Jobs Fullstack

We are looking for a Principal Fullstack Developer(Node.js, React) with a passion for creative game design and systems engineering. You won’t just be pulling tickets from a backlog: you’ll be the technical authority for our products. You will lead two completely different engineering ecosystems: the highly optimized, memory-sensitive world of game clients and the backend infrastructure. You will bridge the gap between creative vision and technical reality, ensuring that the incredible experience enjoyed by players is powered by a robust, secure and scalable backend.

Main Responsibilities

What You Will Do:

• E2E Game Architecture: Design, implement, and maintain complete game features. You will seamlessly integrate scalable server-side backend services with high-performance client-side gameplay and UI logic
• Decoupled Systems: Design a flexible, modular backend that efficiently serves data to various frontend game clients, ensuring seamless integration regardless of the client engine used
• Full-Stack Optimization: Balance performance across the entire product. Optimize server-side load management and database queries while simultaneously managing client-side memory and frame rate stability across a wide range of devices
• Unified Observability: Implement robust real-time data collection, logging, and crash reporting, to track the user journey from client-side actions to back-end server responses
• System Health & Proactive QA: Monitor the entire stack to swiftly detect, diagnose, and resolve cross-domain issues – whether they originate as client-side crashes or backend server bottlenecks
• Security & Risk Mitigation: Implement E2E security protocols for secure client-server communication. Protect sensitive user data on the server while deploying client-side risk mitigation, such as anti-cheat mechanisms and exploit prevention
• Act as the Technical Translator: Serve as the core bridge connecting UI/UX designers, Game Designers, and engineering leadership. You will help translate creative requirements into actionable code while ensuring the backend can support those designs
• Elevate the Team: Mentor developers in modern client-side and backend techniques, fostering a culture of high-quality code and technical ownership
• Set the Standard for Documentation: Create and maintain a unified knowledge base covering both sides of the stack – from API specs and server infrastructure to engine integration manuals
• Drive Agile alignment: Holistically scope features during sprints, ensuring technical requirements align with business goals while actively managing and reducing technical debt

What to Expect:

• Strong Planning and prioritization: You will organize the plan so that you and the team can seamlessly shift gears from optimizing a memory allocation issue in the morning to designing a stateless architecture handling thousands of concurrent players in the afternoon
• Stakeholder management: You will work with product owners and game designers to translate their vision into technical reality, reviewing mechanics and proposing a viable, performant alternative
• Architecture engineering: You will marshal monitoring telemetry to ensure the servers stay up during massive traffic spikes and adjust the approach to facilitate high availability
• Product engineering: You will balance the demands of shipping features fast against the necessity of keeping the codebase clean, scalable, and modular
•  
• 6+ years of development experience and 1+ year of leadership experience
• iGaming/Gambling experience will be a huge plus
• Proven Full-Stack Expertise: Deep professional experience in both game client development and scalable server-side backend architectures
• High Tolerance for Complexity: You are comfortable diving into ambiguous problems and designing systems from the ground up
• Proactive Problem Solver: You find and fix memory leaks, architecture flaws, or security vulnerabilities before they ever impact a player
• Exceptional Communicator: You can explain complex backend constraints to non-technical stakeholders and break down creative requirements into clear engineering tasks
• Experienced Leader: You have a track record of mentoring engineers, driving architectural decisions, and leading projects through the full software development lifecycle
• Fluent English + Ukrainian or Russian - must‑have (for communicaton with ukrainian teammates) 

Stack:

• Languages: TypeScript, JavaScript (Node.js), React
• Frontend Graphics & Animation: WebGL rendering, 2D skeletal web animation
• Real-time Communication & Messaging: WebSockets, Event streaming brokers, Remote Procedure Calls
• Video Streaming: Ultra-low latency (sub-second) video streaming architecture utilizing WebRTC, WHIP, RTMP, and SRT for real-time ingest, combined with H5Live, Low-Latency HLS, MoQ, and ABR for global browser-based playback
• Databases & Storage: Relational (SQL), Document (NoSQL), In-memory caching, Columnar/Analytics databases
• Infrastructure & Orchestration: Cloud infrastructure, Containerization, Container orchestration
• Observability & Monitoring: Distributed telemetry, Log aggregation, Time-series monitoring dashboards

We offer

• Competitive Salary in EUR: with annual performance reviews to recognize your growth
• Flexible Remote Work: balance productivity and comfort
• Comprehensive Benefits: including medical insurance, psychologist support and Polish, Slovak speaking clubs
• Generous Paid Time Off: 20 working days of paid vacation, plus 10 additional paid days off, 10 paid sick days, and all national holidays in your country
• Professional Development Support: reimbursement for courses, trainings, and certifications
• Well-being Perks: support for language classes, sports, massages, or life coaching
• 6-Month Probation Period: a standard period to ensure a strong mutual fit for both you and the company

Are you an experienced engineer passionate about building complex, high-performance systems? We are looking for a Senior/Principal Full Stack Engineer to join an innovative project in the autonomous vehicle domain. This role is fully remote within Europe, giving you the flexibility to work from anywhere while collaborating with a global team.

Customer

Our Customer is a global leader in the automotive sector, specializing in autonomous solutions for moving vehicles. With a valuation of $15 billion and a strong international presence, the company drives innovation in mobility and safety. They are known for deploying advanced AI and sensor technologies to create next-generation transportation systems.

Project

The project focuses on developing advanced software solutions for autonomous vehicle systems. Engineers will work on both front-end and back-end components, enabling real-time data processing, control interfaces, and integration with complex hardware systems. The team applies modern development practices, cloud-native architectures, and robust testing methodologies to ensure reliability and safety.

Key Technologies: ReactJS, TypeScript, Golang, Python, Java, PostgreSQL, Docker.

Requirements

• 6+ years of experience in software development
• Strong hands-on experience with ReactJS and TypeScript
• Backend experience with Golang / Python / Java or another server-side language
• Solid knowledge of PostgreSQL
• Experience with Git, Docker
• Upper-Intermediate English level

WILL BE A PLUS

• Customer-oriented mindset – previous client-facing experience and comfort with direct communication
• Previous experience in Automotive domain

Responsibilities

• Design and implement large or complex parts of the software
• Develop unit, integration, and automated end-to-end tests
• Participate in requirements clarification sessions and raise questions regarding task inputs and requirements
• Peer-review design and code with senior specialists; proactively request reviews
• Promote clean code practices and good design principles (modularity, reuse, extensibility) and mentor others
• Participate in project/team meetings and contribute relevant input
• Join conference calls and face-to-face meetings with the Customer
• Be available for business trips to the Customer’s office in the EU region

Ми — українська група ІТ-компаній E-Tech, що розробляє та розвиває три провідні цифрові продукти:

• E-Tender — платформа для автоматизації закупівель та продажів;
• Health24 — медична інформаційна система для лікарів і пацієнтів;
• E-Docs — система електронного документообігу та автоматизації бізнес-процесів.

E-Tech входить до рейтингу Forbes Next 250 — переліку компаній, які формують майбутнє української економіки. Нашими продуктами користуються українські та міжнародні компанії, державні установи й організації.

Requirements:

• 2+ years of commercial development experience;
• Experience with .NET 7;
• Experience with Angular 14+;
• Experience with Entity Framework;
• Strong knowledge of relational databases;

• Good understanding of OOP, SOLID principles and Design Patterns.

   

Will be a plus:

• PostgreSQL;
• RabbitMQ;
• Azure.

Responsibilities:

• Implementation of new features of company projects in a timely and professional manner;
• Close cooperation with project team members;
• Use Jira, Time tracker New features development;
• Perform other related duties as required;
• Front end/back end 50/50.

What will you get from e-Docs?

• Fully remote work format;
• Paid vacation and sick leave;
• Official employment;
• People-oriented management without unnecessary bureaucracy;
• A product team where you can influence technical solutions and see the impact of your work.

A potential invitation to potential minds!

4K-Soft is People. People are most important to us. People are at the heart of every connection we build. Come and join 4K-Soft, where human minds come together to pave the way for the future. We offer a variety of full-time jobs, training programs and internships. Only imagine, how you can help our company and start your career with 4K-Soft!

We are looking for a Middle FullStack Web Developer.

What we expect from you:
English level: B2 or higher
Experience: 3+ years working with Node.js and React

We offer:

Competitive level of remuneration

Convenient work schedule, paid vacation and sick leaves

The opportunity to grow professionally by participating in the implementation of interesting and complex projects, as well as showing personal initiative.

We are looking for an experienced full-stack engineer who works primarily through AI tools and can take ownership of features end to end. You will join a German product team building business software and mobile apps for their clients. 

The working language is German: meetings, specifications and client communication are all in German.

This is not a classic "write code all day" role. Most of the implementation is done together with Claude and other AI agents. What matters is that you understand the whole system, ask the right questions, judge whether a solution is good enough, and move tasks forward independently.

What you will do
• Deliver features across backend, web frontend and mobile apps, working mainly through AI coding agents (Claude Code or similar)
• Research unfamiliar parts of the system, evaluate the existing implementation and propose what to change
• Clarify requirements directly with the German team and with the client, including business questions
• Work with databases, REST APIs and integrations with the client's ERP and third-party systems
• Spot problems on your own and resolve them
• Take tasks from ticket to release, including testing and handover

Requirements
• 5+ years of commercial software development
• Real full-stack experience: backend, web frontend and at least some mobile development
• Experience with .NET/C# or the ability to work in it confidently; Node.js, React and React Native are also relevant
• Good SQL skills and experience with REST APIs and system integrations
• Daily hands-on use of AI coding tools (Claude Code, Cursor or similar) in real projects, not only for autocomplete
• German at C1 level or higher; you must be comfortable leading a technical or business conversation in German
• Independence: you find the information you need and do not wait for detailed instructions

What we offer
• Remote work, long-term project with a German product team
• A role where AI-driven development is the standard way of working, not an experiment

Full Stack (Backend focused) Engineer

[Freelance, Full-time, Remote]

SNEAK PEEK

⇨ Location: Remote, GMT+0/GMT+4

⇨ Interview process: HR interview + take-home challenge ⇨ Technical Interview ⇨ Final Interview

WHO ARE WE? 

At Rounds, we believe in harnessing the power of cutting-edge technology to drive business success. Our transformative, AI technology identifies and optimizes mobile assets, while our team of experts, with their unparalleled human capital and business acumen, provides the strategic direction and support to turn mobile assets into profitable businesses. Together, we are revolutionizing the mobile industry. 

THE ROLE

This is a backend-focused Full-Stack Engineering role to architect complex core platform systems and expand internal tools. It involves shipping production-grade server-side features in Go while contributing to the React frontend to deliver complete end-to-end features.

You will design and deploy production AI/LLM functionality directly into our product ecosystem while leveraging AI tools day-to-day to accelerate development

Responsibilities

• Architect, build, and maintain scalable backend services and core platform systems in Go and NodeJS/TS.
• Design and ship production-grade AI/LLM integrations, intelligent features, and internal tools.
• Develop intuitive, responsive user interfaces in React to deliver complete end-to-end functionality.
• Utilize modern AI tools and agents (such as Cursor, Claude, and GitHub Copilot) to accelerate daily coding, testing, and system design.
• Collaborate closely with team members to assess architecture risks, estimate timelines, and optimize system performance.

WHAT ARE WE LOOKING FOR?

Must-have:

• 5+ years of commercial experience building and running large-scale, production systems
• 3+ years of production experience with Go/NodeJS/TS on the backend - or strong production experience with another backend language (e.g. Java, C#) 
• Hands-on production experience building AI/LLM-powered features into a product (e.g. RAG pipelines, agentic workflows, LLM API integrations, prompt-driven features) - not just personal experimentation.
• Working proficiency in React (or a similar modern UI framework) and comfort moving between frontend and backend code as needed
• Experience with cloud platforms and their core services (AWS, GCP, or similar)
• Experience with at least two of the following: MySQL, PostgreSQL, MongoDB (or other NoSQL DB), Redis
• Excellent written and verbal communication skills in English

Nice-to-have:

• Experience with broader ML/data science technology beyond LLM-based features
• Experience fine-tuning models or working with model evaluation/observability tooling, building harnesses.
• Prior contributions to open-source projects or libraries

INTERESTED?

Our recruitment process consists of the following steps: 

• HR Interview (30 min) - Discuss your background and fit.
• Take-Home Challenge (~2 hours of work) - Practical assignment reflecting real work.
• Technical Interview (60 min) - Evaluate project, AI and software development skills.
• Final Interview (60 min) 

NexaPay (nexapay.one) is an Estonian fintech company in the payments space. Our payment gateway allows merchants to accept Visa, Mastercard, Apple Pay and Google Pay, and receive settlement in USDC. We work with B2B clients worldwide.

We're scaling and looking for a developer who can build high-quality web interfaces fast, making active use of modern AI development tools. We need someone who can take an idea to a working, well-designed product in a short time — and who genuinely understands what they're building.

What you'll do
— Build and develop the company's websites and landing pages, from mockup to production
— Create internal interfaces and panels for the team
— Maintain, improve and update existing pages and functionality
— Test ideas quickly: build prototypes and take the successful ones to completion
— Own the quality: responsiveness, load speed, correct behaviour across all devices

What matters to us
— A strong sense of modern UI/UX: you build interfaces that look polished and expensive, not templated. This is a key requirement
— Portfolio required: live links to websites or interfaces you've built
— Confident use of AI development tools (Claude Code or similar) — and a clear sense of where they can be trusted and where your own review is needed
— Real understanding of code, not just generation: project structure, working with repositories and Git, deployment, reading and editing existing code, a working grasp of backend and APIs
— Experience with a modern frontend stack (React/Next.js or similar)
— English at B2+: documentation, tools and part of our communication are in English
— Independence: the ability to take a task, see it through, and propose a better solution
— Attention to detail: this is fintech, where accuracy and reliability matter more than speed

Nice to have
— Experience in fintech, SaaS or with payment integrations
— Basic understanding of web application security
— Experience working with analytics and SEO requirements at the markup level

Hiring process
Portfolio review → interview → a test task

Schedule
Full-time, 9:00–19:00 Estonian time (EET), fully remote.

What we offer
— Competitive compensation, paid in crypto
— Fully remote work
— Freedom in technical decisions and a fast cycle: your changes reach real clients immediately
— An international fintech product that's actively scaling
— Room to grow with the company

Send your CV along with links to 2–3 things you've built — that matters more to us than formal experience.

Who we are:

Adaptiq is a technology hub specializing in building, scaling, and supporting R&D teams for high-end, fast-growing product companies in a wide range of industries.
 

About the Product:

We are building a security and compliance platform that enables organizations to detect, prioritize, and resolve security risks across employee devices.

The platform provides real-time identification, assessment, and automated remediation of endpoint security and compliance issues across large, distributed environments. It continuously collects and processes telemetry from thousands of devices. Powered by event-driven streaming infrastructure and data-intensive services, the solution must maintain high levels of reliability, performance, and cost efficiency as it scales.
 

About the Role:

You will join a newly established engineering team responsible for building a next-generation, high-scale data platform from scratch. The platform will collect and process substantial volumes of streaming data from multiple products, creating a unified view across the broader ecosystem.

As one of the first engineers to join the team, you will play an important role in defining the architecture, introducing engineering best practices, and developing scalable solutions for one of the company’s most data-intensive platforms.
 

Responsibilities:

• Design and develop scalable backend services and APIs using Java, TypeScript, gRPC, and Protobuf.
• Build and maintain event-driven data pipelines using Kafka, stream-processing technologies such as Flink, PostgreSQL, ClickHouse, and Redis.
• Write, review, and optimize complex SQL queries, improving query execution plans, indexing strategies, and overall database performance.
• Develop and improve frontend functionality using TypeScript and React.
• Build and support features related to employees, departments, devices, and role-based access control.
• Enhance the platform’s scalability, reliability, performance, observability, and cost efficiency.
• Investigate and resolve production incidents, identifying and removing bottlenecks across backend services, data pipelines, and databases.
• Take end-to-end ownership of features, from technical design and implementation through production release.
• Work closely with a small, highly autonomous team, contributing to architectural decisions and the long-term direction of the platform.
   

Required Competence and Skills:

• 10+ years of experience developing production-grade backend systems, with strong expertise in Java, distributed architectures, and scalable data-processing solutions.
• Hands-on experience with Kafka and event-driven streaming systems, including topic design, partitioning, consumer groups, and delivery guarantees.
• Practical production experience with Apache Flink or another stream-processing framework.
• Strong experience with PostgreSQL and ClickHouse or comparable OLAP databases, such as TimescaleDB or Aerospike, including data modeling, query optimization, indexing, and performance tuning.
• Familiarity with Redis and effective caching strategies.
• Experience with gRPC, Protobuf, and high-volume, low-latency data-processing systems.
• Experience designing and implementing RBAC, permission models, and multi-tenant architectures.
• Experience building frontend applications with TypeScript and React.
• Strong practical experience using AI coding agents such as Claude Code, GitHub Copilot, or Cursor, including reviewing and validating AI-generated code.
• Familiarity with CI/CD practices, Docker, Kubernetes, and production observability.
• Proven experience as a key contributor to complex backend or data-platform projects, with the ability to work independently and deliver scalable solutions.
   

Nice to Have:

• Experience developing Kafka-based data pipelines that consolidate data from multiple backend systems.
• Experience with identity and access management technologies such as Okta, Active Directory, SCIM, or SSO.
• Hands-on experience with Azure or AWS and data-intensive cloud infrastructure.

• Experience integrating AI or LLM capabilities into production backend systems.

   

Why Us:

• 20 days of paid vacation per calendar year, in addition to the official public holidays of the country where you are based.
• Full accounting and legal support in all countries where we operate.
• A fully remote work model, including a powerful workstation and access to a co-working space when needed.
• A competitive compensation package with annual performance and salary reviews.

Requirements:

• Strong experience with React / Next.js
• Strong Python / FastAPI backend experience
• Hands-on experience working with Strapi CMS, including API integrations and customizations
• Experience leading technical decisions, architecture discussions, and code reviews
• Solid understanding of scalable, secure, production-grade systems
• FinTech experience is required
• Experience with trading, brokerage, payments, banking, or other financial products is a strong plus
• Good understanding of cryptocurrency and blockchain product logic, including wallets, transactions, deposits/withdrawals, balances, token networks, and related workflows
• Experience integrating crypto / blockchain APIs, exchanges, custodial providers, or Web3 services is a strong plus
• Understanding of security considerations relevant to financial and crypto products
• Ability to work independently, take ownership, and contribute to technical and product decisions

Please note that completing a test assignment is a mandatory part of the hiring process.

If you’ve read this far, please start your cover letter with the word “apple.”

The Role

We’re looking for a Strong Junior/Middle Full Stack Angular/.NET Developer who is eager to learn, grow, and contribute to real-world projects from day one. This is a great opportunity if you have a solid foundation in programming and want to put your skills into practice while building modern, user-friendly applications.

In this role, you’ll work closely with experienced developers, gaining hands-on experience in Angular, .NET Core, and MS SQL. You’ll be part of a supportive team that values collaboration, knowledge sharing, and continuous improvement.

📋Key Responsibilities

• Assist in identifying and fixing bugs and issues in the codebase
• Contribute to front-end development using Angular by designing and implementing user-friendly interfaces
• Support database maintenance tasks, including writing SQL queries and helping optimize performance
• Participate in code reviews with more experienced developers to learn best practices and coding standards
• Help refactor existing code to improve efficiency, readability, and maintainability
• Collaborate closely with senior developers, gaining hands-on experience and guidance in both front-end and back-end development

📝Requirements

• Completed or ongoing Bachelor’s degree in Computer Science or a related field
• Solid understanding of software development principles and best practices
• Demonstrated coding skills with pet projects available on GitHub (or similar platform), preferably in C#
• Hands-on (non-commercial) experience with:
  • .NET Core (EF Core, MVC, Onion Architecture, or CQRS)
  • SQL databases
• English proficiency at B2+ level
• Availability for a full-time schedule: 12:00 – 20:30 (Mon–Fri, including a 30-minute lunch break)
• Willingness to participate in regular team meetings during working hours
• Strong analytical and problem-solving skills
• Excellent communication and teamwork abilities
• Experience with Angular (or any other JS) framework

What We Offer

📈  Growth opportunities — clear paths for professional development and career advancement

🔋 Supportive culture — a friendly, collaborative environment where your ideas matter

🖥️  Modern projects — work with cutting-edge technologies on meaningful, real-world applications

💡 Talented team — join a motivated group of professionals who are always ready to share knowledge and help you grow

Join our team at SoftPlus Ukraine and contribute to the success of our innovative projects.

Apply now!

We are building a digital orthodontics platform with interactive browser-based 3D tools and backend mesh-processing services.

This is a hybrid role combining native computational geometry in C++, browser-based 3D development with Three.js and TypeScript, full-stack development with Angular and Node.js, and deployment of geometry-processing workloads to AWS.

You will be able to take a 3D feature through its complete lifecycle: implement the geometry algorithm, expose it through a backend service, build the browser interaction, and deploy the complete workflow to production.

Important: this is not a 3D visualization-only position. The role requires hands-on experience with mesh manipulation, computational geometry, 3D mathematics, and geometry-quality validation.

You Are

• A Software Engineer with commercial experience building 3D, CAD, mesh-processing, medical 3D, 3D-printing, scientific visualization, or similar systems.
• Strong in modern C++17 or later, including memory management, performance profiling, native libraries, and dependency management.
• Strong in JavaScript/TypeScript and experienced with browser-based 3D development using Three.js or raw WebGL.
• Experienced with computational geometry and direct manipulation of triangle meshes.
• Familiar with mesh topology, normals, boundaries, connected components, non-manifold geometry, coordinate systems, units, and numerical tolerances.
• Have implemented or integrated mesh operations such as repair, remeshing, simplification, smoothing, cutting, Boolean operations, offsets, distance queries, collision/contact detection, or registration.
• Have practical experience with at least one geometry-processing library or SDK such as VTK, CGAL, Open3D, libigl, MeshLib, OpenMesh, or similar.
• Comfortable with the mathematics behind 3D systems, including vectors, matrices, transformations, projections, quaternions, linear algebra, and spatial queries.
• Familiar with spatial data structures and acceleration techniques such as BVH, octrees, or k-d trees.
• Experienced with Three.js concepts including BufferGeometry, materials, cameras, raycasting, object transforms, interaction tools, and rendering-performance optimization.
• Have practical experience with Angular and reactive application architecture using RxJS or equivalent patterns.
• Have backend experience with Node.js and Express or a comparable framework.
• Comfortable integrating native C++ processing with web services through a CLI, native library, binding, API, or containerized worker.
• Experienced with CMake, Linux, Docker, Git workflows, pull requests, and code review.
• Able to write automated tests for geometry code using fixtures, invariants, tolerance checks, and regression datasets.

• Able to investigate problems across the entire system—from incorrect geometry output to API integration, browser interaction, or cloud execution.

   

Will Be a Plus

• Experience with multiple geometry-processing libraries or commercial 3D SDKs.
• Experience with AWS services such as S3, SQS, Step Functions, ECS/Fargate, AWS Batch, Lambda, ECR, CloudWatch, and IAM.
• Experience designing asynchronous and long-running processing workflows.
• Experience with Infrastructure as Code using Terraform, AWS CDK, or CloudFormation.
• Experience with C++ bindings such as pybind11 or nanobind.
• Experience with Python, NumPy, trimesh, or similar geometry tooling.
• Experience with WebAssembly or compiling native C++ libraries for the browser using Emscripten.
• Experience with Web Workers, transferable buffers, SharedArrayBuffer, or moving CPU-intensive calculations outside the browser’s main thread.
• Experience with three-mesh-bvh, GLSL shaders, large-mesh rendering, or custom Three.js interaction tools.
• Experience evaluating third-party geometry SDKs, including benchmarks, licence restrictions, and headless deployment.
• Background in medtech, healthcare, dental CAD/CAM, scientific visualization, or 3D printing.

• Familiarity with AI-assisted development tools such as Cursor, Claude Code, or Codex.

   

What We Expect from You

• Own 3D features from geometry implementation through backend integration, browser tooling, and production deployment.
• Work directly with mesh data and geometry algorithms, not only with rendering and visual appearance.
• Define clear tolerances, invariants, validation rules, and quality checks for geometry operations.
• Identify cases where an operation cannot produce a reliable result and report them clearly.
• Make practical engineering decisions that help us deliver quickly without unnecessary overengineering.
• Proactively identify geometry-quality, rendering, performance, memory, and scalability issues.
• Maintain clear contracts between C++ processing, backend services, and browser-based 3D tools.
• Be comfortable working in an evolving product with changing priorities and early-stage ambiguity.
• Review, test, and validate AI-generated code before using it in production.

• Communicate effectively with domain experts, frontend engineers, backend engineers, and infrastructure engineers.

   

Responsibilities

• Build and improve native C++ mesh-processing tools and libraries.
• Implement and integrate computational geometry algorithms for processing and modifying complex 3D meshes.
• Build interactive browser-based 3D tools using Three.js and TypeScript.
• Implement Angular components, services, state management, and user workflows for 3D features.
• Develop Node.js/Express APIs that connect browser tools with native geometry-processing services.
• Define stable contracts for mesh formats, metadata, units, coordinate systems, transforms, inputs, outputs, and errors.
• Package C++ geometry operations as reliable headless Linux workers using Docker.
• Deploy geometry workers to appropriate AWS compute services and orchestrate them using Step Functions, queues, and object storage.
• Implement asynchronous job execution, progress reporting, retries, timeouts, failure handling, and structured error reporting.
• Optimize geometry-processing time, memory usage, output quality, browser rendering, and data transfer.
• Write unit, integration, end-to-end, and geometry-regression tests.
• Create representative mesh fixtures and tolerance-based quality checks.
• Investigate issues across C++, Node.js, Angular, Three.js, Docker, and AWS.
• Participate in technical design discussions, pull-request reviews, and engineering best practices.

• Use AI-assisted development tools responsibly to improve development speed and code quality.

   

What We Offer

• Work on an innovative product in the medical-tech and 3D geometry domain.
• High ownership and direct impact on product and technical decisions.
• The opportunity to work across computational geometry, browser 3D, backend systems, and cloud infrastructure.
• Flexible working hours within the European time zone.
• Fully remote, full-time, long-term cooperation.
• A fast-moving environment where strong engineers can influence the product and architecture.
• Company-paid AI development tools.
• Professional development support, including courses and certifications.
• 20 paid business days of vacation.
• 5 paid sick-leave days.
• Paid national holidays.

What We Offer

• 100% remote work opportunity and flexitime - choose working hours between 8:00-20:00 Kyiv time.
• Personal Growth Budget in USD (Travel, Health & Psychotherapy, Sports, Education & Training, Software, Work Equipment).
• Competitive compensation in USD with regular salary reviews.
• Paid vacation, holidays, and sick leave.
• Continuous professional growth through mentorship, feedback, and knowledge sharing.
• English Speaking Club with a native speaker.
• Access to AI tools, including coding assistants for engineers and LLM subscriptions for non-technical specialists.
• Projects with clients across Europe and North America across FinTech, Logistics, Hospitality, E-commerce, Legal, Music, and other industries.
• Transparent processes, flat management structure, and a supportive team culture.

About the Role

• We are hiring a Senior Full-Stack Engineer to become one of the strongest technical contributors on the team.
• The single most important thing we’re looking for is experience scaling a SaaS product. We want someone who has already seen what happens as a live platform grows: increasing complexity, technical debt, scaling bottlenecks, evolving data models, unreliable integrations, and engineering decisions that worked at one stage but became expensive at the next.

• This is a hands-on senior engineering role with strong technical leadership expectations. You will design and write production code, own substantial systems end to end, influence architectural decisions, challenge technical direction when needed, and raise the engineering level of the people around you.

   

Project

• FinTech SaaS platform built for the restaurant and hospitality industry. Our products handle tip pooling and payouts, payroll, reporting and compliance, labor and operational data, and integrations with the systems hospitality businesses already use. The platform is live, serves thousands of customers and moves millions of dollars.

   

Required Hard Skills

• Several years operating at Senior Engineer level on a SaaS product that grew significantly while you were there. You have seen a system become meaningfully bigger and understand the problems that tend to arrive next.
• Strong Python and Django / Django REST Framework experience, or deep experience in a closely comparable backend stack.
• Strong React and TypeScript experience, with the ability to work effectively across backend and frontend when required.
• Strong PostgreSQL and data modeling skills. You should be comfortable designing schemas that can evolve as the business grows into new products and safely changing them once they contain production data.
• Production experience with asynchronous and distributed workloads using Celery or comparable technologies.
• Strong understanding of API design and third-party integrations, including failure handling, retries, idempotency, data consistency, reconciliation, and situations where the system on the other side is unreliable or outside your control.
• Strong understanding of software architecture and the ability to make pragmatic architectural decisions inside a large existing codebase rather than only designing systems from scratch.
• Experience identifying and addressing performance, scalability, reliability, and maintainability problems before they become critical.
• Strong testing practices and experience safely evolving systems that must remain operational while they are being changed.
• Production experience with Docker, CI/CD, monitoring, error tracking, and observability. 
• Strong Linux knowledge. 
• Sound judgment about technical debt: knowing the difference between an acceptable shortcut and one that will create significant problems later, and being able to improve a system while it remains in production.
• Everyday experience with using AI agents for work (Claude Code or Codex). Familiar with configuring AI toolset, understanding pros and cons of modern AI.

Current Stack

• Django / DRF, PostgreSQL, Redis, Celery, Docker, Traefik, Datadog, Sentry, Mailgun, GitHub Workflows.
• Next.js, MUI, TanStack Query, React Hook Form, Zod, Vitest.

Nice to Have

• FinTech or financial systems experience, particularly payments, payouts, ledgers, reconciliation, payroll, banking, audit trails, or other systems where financial correctness matters.
• Experience with restaurant or hospitality technology, including POS, scheduling, workforce management, payroll, or similar systems.
• Experience with high-volume or business-critical third-party integrations.
• Experience improving a system with meaningful legacy code or technical debt while the product remained actively developed.
• Experience with multi-tenant SaaS architectures.
• Experience improving engineering practices across a team rather than only within your own work.
• Experience as a Senior Engineer in a company of roughly 20–200 people, where your role included helping decide what technical work actually mattered.

Required Soft Skills

• Ability to take technical ownership beyond your own tickets and think about the health of the product and engineering system as a whole.
• Strong engineering judgment and the confidence to challenge technical decisions constructively, including decisions made by Staff Engineers and engineering leadership.
• Comfort with ambiguity. Problems will not always arrive fully specified, and part of your job is asking the questions that make them clear before code gets written.
• Ability to explain complex technical trade-offs clearly to engineers, Product, and non-technical stakeholders.
• A strong teaching mindset. You explain your reasoning, document important decisions, review code seriously, and make the engineers around you better rather than becoming the only person who understands a difficult system.
• Comfortable taking leadership during difficult technical situations without waiting for someone else to define every step of the solution.
• Strong written communication and self-direction. The team is distributed across Canada and Europe with limited live overlap, so you need to communicate clearly asynchronously and drive your own work.
• Fluent English, written and spoken.

Key Responsibilities

1. Own substantial systems end to end

• Take meaningful problems that have been identified but not fully solved and work with Staff Engineers and Product to determine the right technical approach.
• Own complex initiatives from problem definition through design, implementation, migration, testing, rollout, and production monitoring.
• Design not only for the expected path, but also for what happens when something goes wrong in production.

• Remain responsible for the systems you build once they are carrying real customer data and real money.

   

2. Help strengthen the architecture of a growing product

• Work closely with Staff Engineers and the VP of Engineering on architectural decisions and technical direction.
• Understand the existing architecture and identify where today’s decisions may create tomorrow’s problems.
• Identify areas where the platform may struggle as product complexity, integrations, customers, data volume, and transaction volume increase.
• Challenge architectural decisions constructively when you see a better approach.

• Help evolve the architecture incrementally through small, safe improvements rather than unnecessary rewrites or over-engineering.

   

3. Protect correctness, reliability, and engineering quality

• Treat financial correctness as a first-class engineering concern.
• Design for reconciliation and auditability: how we prove a number is correct, understand how it was produced, and detect discrepancies before customers do.
• Use Datadog, Sentry, logs, production data, and other signals to identify recurring problems and their root causes.
• Improve observability, error handling, testing, deployment safety, performance, and operational reliability.

• Make sure recurring production problems are solved systematically rather than repeatedly patched.

   

4. Own technically difficult areas of the product

• Lead work involving complex third-party integrations, asynchronous workflows, data synchronization, reconciliation, migrations, and failure recovery.
• Design systems that behave predictably when external APIs fail, requests are duplicated, jobs execute late, or data arrives in an unexpected state.
• Work closely with Product to make technical feasibility and engineering constraints visible before implementation begins.

• Help break large technical initiatives into safe, incremental pieces that can be built, migrated, and released without unnecessarily putting the existing platform at risk.

   

5. Make the case for important technical work

• Identify technical debt, platform investment, reliability work, and architectural improvements that may not naturally appear on the product roadmap.
• Distinguish between debt that can safely remain and debt that is materially affecting reliability, engineering speed, or future product development.
• Make the business and technical case for that work using evidence rather than engineering preference alone.

• Help sequence improvements so they support product development rather than competing with it unnecessarily.

   

6. Raise the level of the engineering team

• Be a strong technical reference point for other engineers.
• Review architecture, designs, and pull requests with a focus on correctness, reasoning, and long-term maintainability.
• Explain why you would make a decision differently rather than simply leaving a verdict.
• Mentor engineers through reviews, pairing, technical discussions, and example.
• Document important knowledge and decisions so understanding stays with the team rather than with one individual.

• Take leadership when a difficult technical problem crosses multiple areas or engineers.

   

7. Remain hands-on

• Design and write production code across the backend and frontend.
• Take direct ownership of technically difficult or risky work when appropriate.
• Debug difficult production issues and establish their root causes.
• Read and understand the existing codebase before changing it.

• Build enough direct knowledge of the platform to ensure your technical decisions are grounded in how the system actually works.

   

Who this position is not for

• This is not a role for someone whose definition of seniority is simply delivering more complicated tickets. 
• If you prefer receiving clearly defined tickets and technical solutions and then implementing them, this role will probably be frustrating.
• It is not a management role. You won’t have direct reports or headcount responsibility. Leadership here comes through technical ownership, judgment, mentoring, reviews, and influence.
• It is also not a Staff Engineer role. Our Staff Engineers and VP of Engineering set the overall technical direction and architecture. You will help shape that direction, challenge it when needed, and fully own the design and implementation of substantial systems within it.
• It is not a greenfield role. You will be joining a live platform with thousands of customers and a roadmap that does not pause while technical improvements are made. Much of the work involves understanding existing systems, migrating them safely, and improving them incrementally rather than replacing them.
• If you naturally ask what happens when the system gets significantly larger, how it fails, how we know the data is correct, and what today’s shortcut will cost us a year from now, you’ll recognize the work.

Things You Should Know Before Applying

• The engineering challenge is no longer simply building features quickly. It is continuing to ship while improving reliability, scalability, architecture, and the technical foundation required for significant year-over-year growth
• There is technical debt. Part of your job is determining which debt actually matters, making its impact visible, and helping address it without stopping product development.
• Requirements will sometimes be incomplete. We expect you to help shape the solution rather than wait for perfect specifications.

• You will be expected to disagree when necessary, propose better approaches, and explain the reasoning behind them.

   

MANDATORY — hands-on experience with Odds88 or a comparable sports data / betting platform providers (Sportradar/Genius Sports/BetConstruct/Hub88/Softswiss ). This is the key selection criterion for this role.

The engineer must be able to build the full sports betting system: Odds88 integration, betting logic, and the bonus system around it.

Requirements

Position Name: Senior Full-Stack Developer (React + Node.js), Sports Betting
Level: Senior (only)

Hard skills requirements:

• Hands-on experience with Odds88 or a comparable provider — Sportradar, Genius Sports, BetConstruct, Hub88, Softswiss (MANDATORY, key requirement)
• At least 6 years of software engineering experience
• At least 4–5 years production experience with Node.js (Nest.js / Express.js / Koa.js), building and operating backend services
• At least 4 years with React — ability to deliver high-quality UI: responsive / mobile-first layouts, attention to detail, basic frontend performance hygiene
• TypeScript in production: typing API contracts, safe refactors, avoiding any
• Strong PostgreSQL + SQL: joins, aggregates, pagination patterns, indexing implications, transactions and isolation, row-level locks (SELECT … FOR UPDATE), handling double-submit/double-spend scenarios
• Third-party API integration experience — external feeds, webhooks, retries, idempotency, reconciliation
• Modern backend architecture: microservices, asynchronous communication, distributed systems basics (timeouts, retries, idempotency, backpressure)
• Strong software design knowledge: OOD, FP fundamentals, design patterns, maintainable modular code
• Proficient Git (PRs, reviews, branching, conflict resolution), Docker and CI/CD
• Agile / SCRUM development practices

Would be great:

• Direct Odds88 integration experience (strongest possible match)
• Experience building bonus systems / promotions engines in iGaming
• WebSockets at scale (live odds, real-time updates)
• Messaging / eventing fundamentals (Kafka, RabbitMQ, SQS+SNS, NATS)
• Tech/Team Lead experience
• Observability: logs/metrics/tracing, SLO thinking

Soft skills requirements:

• Strong communication — can discuss past integration work in technical detail
• Proactivity and ownership
• Able to reason about tradeoffs and defend technical decisions
• Fast and independent learner

Responsibilities:

• Build sports betting functionality for the client's platform
• Integrate with Odds88 and related sports data feeds
• Build the system supporting bonuses, betting and everything related to sports
• Deliver full-cycle features: design → implementation → testing → rollout → monitoring
• Own data correctness and performance in Postgres (transactions/locking, indexes, migrations, query optimization)
• Participate in architecture discussions, code reviews, documentation and production support

English: Upper-Intermediate — must have
Office/Remote: Remote, full-time, long term

Our Customer:

A global product company in the cybersecurity domain, focused on helping organizations identify and reduce risks across modern IT environments.

Your Tasks:

• Develop and maintain production features across the full stack, from the React UI through the API to the database.
• Design, maintain and troubleshoot Node.js and TypeScript backend services and production APIs.
• Maintain and enhance the React front end, including modern React patterns, data flow and UI performance.
• Own the data access layer in Node.js/TypeScript, keeping control over generated SQL and performance-critical behavior.
• Design and evolve database schemas, relationships, constraints and data integrity rules.
• Diagnose and optimize slow queries and production bottlenecks using execution plans and index analysis.
• Plan and execute production database migrations with backward compatibility and minimal downtime.
• Trace and resolve production incidents across the UI, API, data access layer and database.
• Interface directly with the international client and engineering team in live technical discussions.
• Deliver high-quality, resilient software updates with limited supervision.

Required Experience and Skills:

• 8+ years of professional software engineering experience, including recent hands-on full-stack work in production systems.
• Strong hands-on experience with Node.js and Node.js frameworks such as NestJS or Hapi.js.
• Expert-level knowledge of TypeScript in both backend services and data access layers.
• Strong production experience with React, including modern React patterns and state and data flow.
• Hands-on experience with state management libraries (MobX or Redux).
• Strong practical SQL skills, preferably with PostgreSQL.
• Hands-on experience with complex JOINs, aggregations and filtering on large datasets.
• Proven ability to diagnose slow queries using EXPLAIN and ANALYZE, execution plans and index effectiveness validation.
• Experience designing and maintaining data access layers with query builders or ORM tools.
• Practical experience with schema design, normalization and denormalization decisions, constraints and data integrity.
• Hands-on experience with multi-step transactional operations, rollback behavior, race conditions and transaction isolation trade-offs.
• Experience with production database migrations, schema versioning, backward-compatible changes and zero-downtime deployment approaches.
• Strong REST API experience, including over-fetching, N+1 problems, latency and efficient mapping of database data into API responses.
• Demonstrated ability to trace production issues across the UI, API, data access layer and database.
• Experience in production environments with large record volumes and high load.
• Experience working in an Agile environment, maintaining code quality through peer reviews and testing.
• Proven ability to work autonomously, clarify requirements and drive tasks to completion without continuous follow-up.
• Proven ability to take ownership of outcomes across the full stack rather than a single component.
• Proven ability to raise risks, blockers and missing information early and provide clear status updates.
• Ability to enter an existing codebase and domain, absorb context quickly and adapt to established engineering practices.
• Ability to receive direct feedback, discuss disagreements professionally and adjust quickly.
• English – Upper-Intermediate

Would Be a Plus:

• Hands-on experience with GraphQL schemas, resolvers and integration
• Experience with Next.js and server-side rendering
• Experience with stored procedures and database-side performance-critical logic
• Experience with Redis and caching strategies that reduce unnecessary database load
• Experience with AWS and cloud-based production environments
• Exposure to Docker, Kubernetes and CI/CD pipelines
• Background in cybersecurity or identity management
• Experience with large-scale identity data (Active Directory or Entra ID)
• Experience with data-intensive, analytics or enterprise high-load products

We are looking for a Senior AI-Native Full-Stack Developer to join remote team and work on a long-term project for a client in the real estate industry.

Remote | Full-time | Long-term engagement | Start ASAP | Preferred candidate location: EU

Client: Real Estate Domain

We are building an AI-native delivery team that ships working software in days, not quarters. You will combine strong full-stack engineering and architecture skills with an AI-first development workflow, using tools such as Claude Code, Cursor, Replit, v0, Lovable, Bolt, or similar.

What You'll Do

Build and deploy end-to-end applications across frontend, backend, databases, APIs, and cloud infrastructure.

Architect applications and make pragmatic technical decisions.

Lead development patterns, coding standards, and best practices.

Own projects end-to-end, from A to Z.

Conduct code reviews and provide technical guidance.

Build AI-powered features such as AI search, document processing, summarization, workflow automation, and agentic experiences.

Use AI for coding, debugging, testing, refactoring, and documentation.

Ensure security, data protection, authentication/authorization, secure API design, and safe handling of AI-generated code and data.

Balance speed of prototyping with code quality, security, maintainability, and production readiness.

Work closely with the integration engineering team when solutions move toward production.

Requirements

5+ years of software development experience.

5+ years of application architecture experience.

5+ years establishing coding patterns and engineering practices.

5+ years conducting code reviews.

5+ years leading projects end-to-end.

• Strong experience with modern web technologies: React/Vue, Node.js/Python, databases, APIs, and cloud platforms.
• Experience with platforms such as Vercel, Railway, Supabase, or similar.
• Strong understanding of application security and secure development practices.
• Daily experience with AI coding assistants such as Claude Code, Cursor, or similar.

Required: Portfolio of AI-built products shipped within the last 90 days.

Strong ability to distinguish between prototype-quality and production-ready solutions.

Nice to Have

PropTech, real estate, or operations-focused product experience.

Experience taking AI-assisted prototypes into production.

Experience with LLMs, RAG, AI agents, or automation workflows.

German language skills.