Jobs Fullstack

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) 

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.”

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.

The Role

We are looking for a versatile Senior AI Full-Stack Developer who can build, ship, and utilise cutting-edge AI builder platforms (OpenAI, Anthropic, AI Studio, Lovable, Base44, etc), cloud ecosystems (Vercel, AWS, etc), and backend tools (Supabase, Superwall, etc) to accelerate product development, and iterate on web and mobile-ready applications end-to-end, with a knowledge of modern frontend (Vue.js/Nuxt, Webflow) and backend (Python/Django, PostgreSQL).

 

Key Responsibilities

• Utilize AI-first development engines and platforms (OpenAI, Anthropic, Lovable, Base44, Vercel, Supabase, etc) to build, test, and iterate on features at lightning speed.
• Build, maintain, and optimize scalable web applications using Vue.js (2/3), Nuxt, Python (Django/DRF), and PostgreSQL.
• Design secure RESTful APIs, asynchronous tasks (Celery, Redis/RabbitMQ), OAuth flows, and third-party integrations including paywalls/monetization (Superwall) and payments.
• Deploy and manage services using Docker, Vercel, AWS (S3, RDS, CloudFront, SQS), and GitHub Actions CI/CD pipelines.
• Own features from technical requirements to testing, code reviews, release, and monitoring (Sentry).

Requirements

• 5+ years of software engineering experience across full-stack web and cloud applications.
• Hands-on experience with AI development frameworks, low-code/AI builders (OpenAI, Anthropic, Lovable, Base44), and modern backend services (Supabase, Superwall).
• Good knowledge of Vue.js (Vue 2/3, Nuxt 2/3/4), TypeScript/JS, HTML5/CSS3/Tailwind.
• Good knowledge of Python with Django / Django REST Framework, ORM, caching (Redis), and relational databases (PostgreSQL).
• Proficiency deploying on Vercel and AWS, containerizing with Docker, and managing CI/CD pipelines.
• Language: Professional English proficiency (B2+).

Nice-to-Have

• Experience migrating Webflow sites to Vue/Nuxt.
• Knowledge of payment gateways (Mollie, Stripe, PayPal), media/PDF processing, or WebSockets.
• Testing experience with Pytest, Jest, or Cypress.

We're an early-stage product company building an AI-powered analytics platform for the iGaming industry. Users get answers from their data in plain English — an LLM turns questions into validated SQL over a large data warehouse — alongside a set of analytics dashboards and data pipelines. It's live in production.

You'd be our first dedicated engineer, working directly with a technical founder (product) and an experienced CTO (architecture + code review) — with a real path to Tech Lead as the team grows. You won't be flying solo, and you'll help shape the architecture, not just maintain it.

What you'll do

• Build and ship features across the backend and the dashboard.
• Write correct, performant SQL against a large Postgres warehouse — the numbers drive real decisions.
• Extend the LLM→SQL pipeline and the analytics APIs behind the product.
• Own reliability, testing, and deploy stability as we scale.

• Maintain and extend the React / TypeScript front end.

   

Stack

• Backend: Python 3.12 + FastAPI (async, SQL-first with asyncpg — no ORM).
• Data: large Azure PostgreSQL warehouse (tens of millions of rows) + nightly aggregation pipelines.
• AI: Anthropic Claude (natural-language → SQL, agent workflows).
• Frontend: React 18 + TypeScript + Vite, shadcn/ui + Tailwind, TanStack Query, Recharts.
• Infra: Azure, Redis, Docker, GitHub Actions.

Note: the data-science/ML models are owned by the founder — you won't build or maintain those.

You'll thrive here if you have

• Strong SQL and relational-DB skills (Postgres a plus) — the single most important thing.
• Solid Python, ideally with an async framework (FastAPI).
• Good React + TypeScript.
• A correctness-first instinct for data, and the ability to pick up a fast-built codebase and make it solid.

• Comfort with cloud + CI/CD (Azure a plus) and Docker.

   

Nice to have

• LLM app experience (Anthropic/OpenAI, NL→SQL, RAG).
• Data engineering / BI / warehousing background.
• iGaming, fintech, or marketplace domain experience.

Why join

• A live, revenue-generating product — early enough to shape it.
• A clear growth path to Tech Lead.
• Modern stack: large data warehouse + production LLM pipeline + polished React app.
• Real support: a technical founder on product, an experienced CTO on engineering.

Location: Bucharest, Romania
Work format: Remote
Employment type: Full-time

We are looking for a Senior AI / Java Full-Stack Software Engineer to help design, develop, and operate modern cloud-based applications for the healthcare domain.

In this role, you will work across Front-end, Back-end, and DevOps domains while designing and integrating AI-powered features into business applications used by doctors and clinics. The position requires hands-on commercial experience with modern AI and LLM technologies.

CUSTOMER AND PROJECT

Our Customer operates in the medical domain and develops applications for doctors and clinics.

The project combines Java Full-Stack development, cloud-native engineering, DevOps practices, and the integration of AI-powered capabilities into healthcare applications.

TECHNOLOGY STACK

• React, Angular
• Java, Spring Boot
• Kafka, Terraform
• Kubernetes, Helm, ArgoCD
• Azure OpenAI or similar AI platforms

RESPONSIBILITIES

• Develop and maintain modern web applications using Java, Spring Boot, and modern Front-end technologies
• Design, develop, and integrate AI-powered features into business applications
• Build AI agents, intelligent workflows, and automation solutions
• Work with modern LLM platforms and AI development tools
• Build and operate cloud-native services with a strong focus on reliability, security, and scalability
• Collaborate with Product, UX, Architecture, and Engineering teams
• Drive engineering excellence and AI adoption within development teams

REQUIREMENTS

• Senior-level Java Full-Stack development experience
• Strong Front-end expertise with React or Angular
• Strong Back-end expertise in Java and Spring Boot
• At least 1 year of hands-on commercial experience developing and integrating AI-powered features into software products
• Practical experience building AI agents, intelligent workflows, or automation solutions
• Practical experience with modern LLM ecosystems and AI platforms, such as Azure OpenAI or similar
• Experience with cloud-native architectures and DevOps practices
• Demonstrated practical use of AI tools in software engineering
• Degree in Computer Science or an equivalent technical background
• Strong English communication skills

A product team that works in short delivery cycles and relies heavily on AI tooling throughout the development process. We need a senior engineer who is comfortable owning a product area end-to-end and who already works this way day to day — not someone who is curious about it.
 

Scope of work
• Design and ship complete applications: frontend, backend, data layer, APIs, deployment
• Make architectural calls and keep them pragmatic
• Set engineering conventions and quality standards for the team
• Run code reviews and give technical direction
• Build product features on top of LLMs: semantic search, document handling, summarisation, process automation, agent-style flows
• Apply AI assistants across your own workflow — writing, debugging, testing, refactoring, documenting
• Own authentication, authorisation, API security, data protection, and careful review of AI-generated code
• Judge correctly when something is a throwaway prototype and when it must be production-grade
• Hand over cleanly to the integration team when work moves to production
 

Must have
• 5+ years building software commercially
• Comparable track record in application architecture, setting team conventions, reviewing code, and running projects independently from start to finish
• Solid modern web stack: a major JS framework plus Node or Python, relational and non-relational storage, API design, cloud deployment
• Practical experience with modern hosting and backend-as-a-service platforms
• Strong grounding in secure development
• Active daily use of AI coding assistants — this is central to the role, not a bonus
• Recent work samples (last 2–3 months) of products built with AI assistance — links, repos, or demos
• Clear judgement on prototype vs production quality
 

Nice to have
• Background in operations-heavy products
• Experience moving AI-assisted prototypes into live systems
• Hands-on with LLMs, retrieval pipelines, agents, or automation tooling

Duration: Minimum 3 months, open-ended (evolving product)
Workload: Full-time
Start Date: Target October 15 or earlier

Project:
The company specializes in AI model compression and is expanding its own model development capabilities. Its Model Serving platform provides developers and external users with access to AI models through APIs. The public developer portal serves as the main platform where users can manage their usage, access tokens and APIs, and explore technical documentation. The product has grown significantly over the past 7–8 months and has become a high-priority area for the company.

Experience Level: Senior developer who can work independently across stakeholders and drive features from requirements through to completion.
 

Core Responsibilities:

Take features from concept through implementation and delivery
Drive end-to-end feature development with cross-team collaboration (DevOps, MLOps, Finance & Legal, etc.)
Implement new features and advanced platform capabilities such as RBAC, analytics, monitoring, etc.
Set up metrics and monitoring systems for growth tracking

Required Technical Skills:

Languages & Frameworks: Python, React, PostgreSQL
Third-party Integrations: LogTo (authentication), Stripe (payments), and other external APIs
Infrastructure: AWS hosting (with DevOps team support)
Full Stack Capability: Both backend and frontend development
English: B2+

Client Interview Format:
30–45-minute technical discussion focused on understanding the product and mutual fit

RedCore is an international business group that creates technological solutions for digital markets. Our products and services cover fintech, marketing, e-commerce, customer service, communications, and regulatory technologies.

We are looking for a Software Engineer (Fullstack)!

Requirements:

• Bachelor’s or Master’s degree in Computer Science, Software Engineering, or a related field;
• 5+ years of experience in software engineering, including production fullstack delivery;
• Strong proficiency in Python and TypeScript;
• Experience with back-end frameworks (FastAPI);
• Solid experience with Angular (standalone components, signals, OnPush strategy)Expertise in object-oriented programming and SOLID principles;
• Solid understanding of computer science fundamentals, data structures, and algorithms;
• Strong knowledge of concurrency, parallelism, and related concepts;
  Experience with RESTful APIs and microservices architecture;
• Proficiency in version control systems, particularly Git;
• Familiarity with CI/CD pipelines and DevOps practices;
• Strong understanding of SQL database systems;
• Knowledge of containerization technologies (Docker, Kubernetes);
• Testing and quality mindset; understanding Test Pyramid methodology and different Test Categories (pytest, Jasmine/Karma or similar);
• Understanding of Observability (structured logging, metrics, traces, OpenTelemetry) and Reliability (retries, backoff, idempotency);
• Experience with authentication and authorization (OIDC/JWT; Keycloak or similar identity providers).

Will be plus:

• Experience with message brokers (e.g., NATS JetStream, Kafka, RabbitMQ);
• Experience with ClickHouse or other analytical/OLAP databases;

• Experience with Playwright or similar browser automation;

   

Responsibilities:

• Develop and maintain robust, scalable web applications;
• Design and implement efficient High Load APIs;
• Ensure high performance and responsiveness of applications;
  Implement security measures and data protection in line with industry standards;
• Participate in code reviews and contribute to improving development practices;
• Troubleshoot, debug, and upgrade existing software;
• Write technical documentation and maintain system architecture diagrams;
• Stay updated with emerging technologies and industry trends.

Our benefits to you:

☘️An exciting and challenging job in a fast-growing business group, the opportunity to be part of a multicultural team of top professionals in Development, Architecture, Management, Operations, Marketing, Legal, Finance, and more

🤝🏻Great working atmosphere with passionate experts and leaders, sharing a friendly culture and a success-driven mindset is guaranteed

🧑🏻‍💻Modern corporate equipment based on macOS or Windows and additional equipment are provided

🏖Paid vacations, sick leave, personal events days, days off

💵Referral program — enjoy cooperation with your colleagues and get the bonus

📚Educational programs: regular internal training sessions, compensation for external education, attendance of specialized global conferences

🎯Rewards program for mentoring and coaching colleagues

✈️In-house Travel Service

🦄Multiple internal activities: online platform for employees with quests, gamification, presents and news, clubs for movie / book / pets lovers and more

🎳Other benefits could be added based on your location 
 

Superagent AI is building the AI-native distribution layer for insurance - a $7T industry still run on manual workflows and legacy software. We're an early-stage, fast-moving team reimagining how insurance is sold, serviced, and supported, with AI at the core. Backed by top-tier VCs, we're an international team of exited founders, builders, and technologists.

Already trusted by 100+ agencies, the job now is to build the next version of the platform quickly and run it reliably as we continue to scale rapidly — a real-time voice platform, an agent/skills layer, omnichannel messaging, and deep insurance system integrations.

Why this role exists

Our AI voice agents talk to real policyholders every day, and they're already working. What they say, and how reliably they say the right thing, is the product, and we've built real strength here. Now we want to move faster and take it to the next level.

We're hiring a Voice/Conversational AI Engineer to add firepower to how our agents are prompted, evaluated, and improved. You'll design and scale the prompts and agent behaviors behind live calls, mine real call data for the next set of wins, and build the evals and benchmarks that let us push quality forward with speed and confidence. The goal is leverage: ship more improvements, faster, each one backed by evidence rather than guesswork.

This is a hands-on builder role at the intersection of applied AI, data, and product quality — an opportunity to raise an already strong voice platform to a new level.

What you'll own

• Prompt engineering at scale — design, structure, and version the prompts and agent behaviors that drive live voice calls, in a way that stays maintainable as the number of agents and use cases grows.
• Reliability of agent behavior — make the same prompt behave consistently across calls, edge cases, and model updates; catch regressions before customers do.
• Call analysis — dig into real transcripts and call data to find failure patterns, missed intents, and opportunities, and turn those findings into concrete improvements.
• Evals & benchmarks — build the eval harnesses, datasets, and benchmarks that measure agent quality (accuracy, task completion, latency, tone), and make them part of how we ship.
• Data-driven decisions — set the metrics, run the experiments, and bring evidence to every change, so we push quality forward with speed and confidence.
• Velocity through AI-native engineering — you use Claude Code and Codex every day to orchestrate coding agents and raise your leverage, without letting speed erode the reliability bar.

About you (must-haves)

• Strong applied-LLM experience — you've built and shipped LLM-powered features in production, not just prototypes.
• Serious prompt-engineering craft — you can decompose a hard task into reliable prompts/agent steps, and you have opinions on structure, versioning, and keeping prompts maintainable at scale.
• Evals-first mindset — you've built (or badly wished you'd built) eval harnesses, benchmarks, and test sets, and you believe quality is something you measure, not vibe-check.
• Comfortable in data — you can pull, slice, and analyze call/transcript data (SQL and Python/TypeScript) to find signal and quantify impact.
• Solid engineering foundation — you write production code (TypeScript/Node preferred) and can integrate your work into a real backend, not hand it off as a notebook.
• Rigor over intuition — you default to experiments and evidence, and you make the case with data.
• You live in Claude Code / Codex (or equivalent) — fluent and opinionated about AI-assisted engineering. In 2026, we treat this as table stakes.

• Ownership mindset — you own agent quality end-to-end, including in production, and you stay close to how it affects real agencies and their customers.

   

Bonus

• Real-time voice/telephony context (Twilio, SIP, ASR/TTS, latency-sensitive audio) and how it shapes prompting and evals.
• Building agentic systems in production — tools/skills frameworks, MCP, guardrails.
• Fine-tuning, distillation, or eval-driven development at a deeper level.
• Experience building LLM-as-judge or automated grading pipelines.
• Insurance, fintech, or another regulated/compliance-heavy vertical.

Our stack & tools

• Backend: TypeScript, Node, NestJS · monorepo (libs + apps)
• Voice: real-time streaming audio, ASR/TTS, telephony (Twilio / SIP)
• Data: PostgreSQL on AWS RDS (multi-tenant, row-level security)
• AI: Anthropic + OpenAI models, prompt/agent orchestration, evals; fine-tuned/distilled models on our own data
• Frontend: React / Next.js
• Platform: AWS · Clerk (auth) · Datadog (observability) · Pylon + HubSpot (CS/CRM)
• How we ship: Linear (with agent delegation), GitHub, and Claude Code + Codex as part of daily engineering

How we build (engineering principles)

• Reliability is a feature. We don't ship what we can't keep running. The quality bar is non-negotiable.
• AI-native by default. Claude Code, Codex, and coding agents are part of how we work, not a novelty. We expect leverage from them, every day.
• Close to the customer. We prioritize real agency calls and feedback, not opinions in a room.
• Ship small, ship often. Short cycles, fast feedback, evals over guesswork.
• Ownership. Engineers own their work end-to-end — including in production.

How we work

Fast-moving distributed team with an AI-native engineering culture. We're closer to our customers than most competitors — that's our edge, and it drives how we prioritize. We ship things that work for real agencies, not demos.

Senior Full Stack Engineer

We’re building the Production ready system from the PoC and looking for a Senior Full Stack Engineer who enjoys creating scalable products and taking ownership of real technical decisions. You’ll work closely with product and design teams, shape parts of the architecture, and help turn ideas into a production-ready platform.

Requirements:

• 5+ years of software development experience with JavaScript, TypeScript, and modern ES6+
• Strong experience with React and Next.js
• Strong experience with backend development using Node.js / NestJS
• Hands-on experience with MongoDB and PostgreSQL
• Hands-on experience with MQTT
• Experience building applications that can be deployed on both OnPrem and Cloud platforms
• Experience building scalable applications and contributing to system architecture
• Ability to take ownership of features and technical solutions
• Comfortable working in fast-paced, product-driven environments
• Strong communication skills and ability to collaborate with both technical and non-technical stakeholders
• Upper-Intermediate English (B2+)

Nice to Have:

• Experience with React Native or WebSockets
• Experience working in startup or early-stage environments
• Experience with Azure, IoT Hub, Microsoft Entra ID
• Previous experience mentoring engineers or contributing to technical leadership

Responsibilities:

• Develop and deliver key features of a new product from concept to launch
• Contribute to the design and implementation of scalable frontend and backend architecture
• Collaborate closely with product, design, and engineering teams
• Take ownership of technical solutions and help drive implementation
• Participate in code reviews and maintain high engineering standards
• Contribute to development best practices and team workflows
• Support and mentor less experienced engineers when needed
• Continuously improve performance, reliability, and scalability of the platform.

Why we are hiring

We need a full-stack developer to build and maintain our web-based brokerage platform. The person will work across the product—from customer-facing React interfaces to backend services, integrations, and cloud infrastructure.

What the person will own

• Product development

1. Build React experiences for onboarding, account management, trading, funding, and portfolio management.
2. Develop backend services and APIs supporting the platform.
3. Integrate external brokerage, payments, KYC, authentication, and other third-party services.

• Platform and infrastructure

1. Design secure and scalable services using TypeScript, Node.js, MongoDB, and AWS.
2. Deploy and operate containerized workloads using ECS and Fargate.
3. Manage cloud infrastructure using Terraform.

4. Monitor production systems and investigate performance and reliability issues.

    

Level and experience

• 5+ years of professional full-stack development experience.
• Strong production experience with TypeScript, React, and Node.js.
• Experience building and operating customer-facing web products.

• Ability to own features from product requirements through deployment and production support.

   

Must-have skills

• Strong proficiency in React, TypeScript, and Node.js.
• Experience designing REST APIs and integrating external services.
• Production experience with MongoDB, including data modelling and query optimization.
• Understanding of authentication platforms such as Clerk, Auth0, or Cognito.
• Knowledge of OAuth 2.0, OpenID Connect, JWTs, sessions, MFA, and role-based access control.

• Experience with automated testing, CI/CD, monitoring, and incident investigation.

   

Nice-to-have skills

• Strong AWS experience, particularly ECS, Fargate, IAM, CloudWatch, and networking.
• Experience managing infrastructure with Terraform.
• Experience with brokerage, trading, fintech, payments, or KYC products.
• Familiarity with WebSockets and real-time applications.

• Experience handling financial data, audit trails, and reconciliation.

   

Tech stack

• Frontend: React, TypeScript
• Backend: Node.js, TypeScript
• Database: MongoDB
• Authentication: Clerk, OAuth 2.0, OpenID Connect
• Cloud: AWS, ECS/Fargate, IAM, CloudWatch
• Infrastructure: Terraform, Docker
• Delivery: CI/CD and automated testing

Our Customer:

Our client is a global technology company developing an advanced cloud platform for AI-powered voice communication. Their product enables organizations to build, integrate, and deploy intelligent voice services by combining modern AI technologies, large language models, and enterprise-grade communication infrastructure. The engineering team focuses on creating scalable, cloud-native SaaS solutions that process real-time interactions while maintaining high performance, reliability, and security.

Your tasks:

• Design and develop new product features across both backend and frontend components.
• Build scalable backend services using modern .NET technologies.
• Develop responsive Single Page Applications using the latest React ecosystem.
• Design and integrate REST and GraphQL APIs.
• Work with relational and NoSQL databases while ensuring data consistency and performance.
• Participate in designing microservices-based architecture and distributed systems.
• Collaborate with product managers, architects, and other engineers throughout the entire development lifecycle.
• Leverage AI-assisted development tools (such as Claude, GitHub Copilot, etc.) to improve productivity while maintaining full
• ownership and understanding of the implementation.
• Write clean, maintainable, and well-tested code following modern engineering best practices.
• Contribute to architecture discussions, code reviews, and continuous product improvements.

Required experience and skills:

• 3+ years of commercial experience in Full Stack development.
• Strong experience with modern C#, .NET Core, and ASP.NET Core.
• Solid hands-on experience with the latest versions of React, including Functional Components, Hooks, and modern state management.
• Experience building Single Page Applications (SPA).
• Strong knowledge of Entity Framework.
• Experience designing and developing microservices-based applications.
• Practical experience with REST APIs and GraphQL.
• Experience with SQL and NoSQL databases (SQL Server, PostgreSQL, MongoDB, or similar).
• Good understanding of asynchronous programming, distributed systems, and cloud-native application development.
• Experience using AI-assisted development tools (Claude, GitHub Copilot, or similar) as part of the software development workflow.
• Ability to explain architectural decisions, coding approaches, and engineering best practices independently, without relying solely on AI-generated code.
• Strong analytical thinking, problem-solving skills, and ownership mindset.
• Experience working in Agile development environments.
• Upper-Intermediate (B2) or higher level of English.

Would be a plus:

• Experience with Docker and CI/CD pipelines.
• Experience with Azure and Azure Kubernetes Service (AKS).
• Knowledge of cloud-native SaaS architecture.
• Experience with high-load or real-time communication systems.
• Familiarity with modern software architecture patterns and system design.
• Experience participating in technical design discussions and architectural decision-making.

Our Customer:

Our customer is an international technology company developing a modern cloud-based SaaS platform used by businesses to automate and optimize their daily operations. The product serves enterprise customers and is built with scalability, reliability, and long-term maintainability in mind. The engineering team follows modern development practices, values clean architecture, and actively collaborates across product, design, and QA to deliver high-quality software.

Your Tasks:

• Design, develop, and maintain scalable full-stack web applications using .NET and React.
• Build reusable, maintainable, and high-quality backend and frontend components.
• Design and implement RESTful APIs and integrate backend services.
• Collaborate with Product Managers, UX/UI Designers, QA Engineers, and other developers throughout the development lifecycle.
• Participate in architecture discussions and contribute to technical decisions.
• Optimize application performance, scalability, reliability, and security.
• Troubleshoot and resolve issues across both frontend and backend systems.
• Work with Docker, CI/CD pipelines, deployment configurations, and monitoring tools to support reliable software delivery.
• Perform code reviews and share technical knowledge within the team.
• Follow Agile methodologies and software engineering best practices.

Required Experience and Skills:

• 5+ years of commercial experience in full-stack software development.
• Strong hands-on experience with .NET / C#.
• Strong experience with React and modern JavaScript/TypeScript.
• Experience designing and consuming RESTful APIs.
• Solid knowledge of SQL databases.
• Experience working with Docker, deployment pipelines, and monitoring tools.
• Experience with Git and modern CI/CD workflows.
• Strong understanding of object-oriented programming, software architecture, and design patterns.
• Experience working for a large, globally recognized product or technology company.
• Excellent analytical and problem-solving skills.
• Ability to work independently and effectively in a cross-functional Agile team.
• Upper-Intermediate English or higher.

Would Be a Plus:

• Experience with cloud platforms (AWS, Azure, or GCP).
• Experience with microservices architecture.
• Knowledge of Kubernetes or container orchestration.
• Experience with automated testing and TDD.
• Previous mentoring or technical leadership experience.

Our Customer:

Our customer develops specialized software products for professional business workflows. The engineering team works on established production applications and is looking for a full-stack engineer who can contribute across both frontend and backend development.

Your Tasks:

• Develop and maintain full-stack applications across React/TypeScript frontend and C# backend.
• Work on medium and large-scale production applications throughout the development lifecycle.
• Develop and maintain frontend functionality using React, including both Hooks and class-based components.
• Build and maintain backend functionality using ASP.NET MVC and Web API on the classic .NET Framework.
• Investigate, debug, trace, and resolve complex frontend and server-side issues.
• Apply software engineering principles, design patterns, and clean development practices.
• Quickly learn and adopt new technologies when required.
• Work independently while contributing across the full technology stack.

Required Experience and Skills:

• 3+ years of experience working with medium or large-scale React applications.
• 2+ years of experience working with medium or large ASP.NET MVC or Web API applications.
• Strong knowledge of React Hooks and classic class-based components.
• Strong TypeScript skills.
• Good understanding of core web technologies, including JavaScript, XHTML, and CSS.
• Production experience with Redux, Redux Saga, and Immutable.js.
• Strong frontend debugging and problem analysis skills.
• Hands-on experience with the classic .NET Framework; working experience with .NET Core is not required, but solid knowledge of .NET Core is required.
• Strong knowledge of C#, OOP, SOLID principles, design patterns, reflection, and algorithms.
• Strong understanding of XML and JSON serialization.
• Ability to debug, trace, and resolve complex server-side issues.
• Strong ability to learn new technologies quickly and work independently.
• University degree in Computer Science or a related field, or equivalent industry experience.
• Excellent English.

Would Be a Plus:

• Experience with AWS services such as SQS, EKS, and Fargate.
• Experience with cloud-oriented systems.
• Experience with Kubernetes.
• Experience with Node.js.
• Knowledge of nw.js or similar technologies.