Jobs Fullstack

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.

About the project:

Our customer  is a full quote-to-cash ERP/PSA used by field service companies (system integrators) that install and maintain physical equipment - AV systems, security cameras, fire alarms, HVAC. The platform covers:

• Sales: opportunities, quoting, ordering
• Projects: project management, resource scheduling
• Service: dispatch, ticketing, field technician management
• Finance: accounting, GL, invoicing, purchasing (the financial core is central to everything)
• Reporting: data sources, dashboards, report builder

All modules feed into a single financial core. The platform is sold as an all-or-nothing product today - no modular subscriptions.

You will work closely with stakeholders to analyze the current solution, identify technical risks, document findings, and provide recommendations that will shape future development. This is an excellent opportunity for an experienced engineer who enjoys solving complex technical challenges, investigating legacy systems, and making architectural decisions.

Requirements

• 7+ years of commercial software engineering, with Backend and Frontend development using TypeScript
• Hands-on experience with NestJS (or similar JS frameworks for backend development) and React
• Hands-on experience with REST API and GraphQL protocols
• Proven track record leading engineering teams - technical mentorship, code reviews, architectural decisions.
• Strong experience working with complex backend systems (beyond CMS platforms or simple websites). Experience with ERP systems is a significant advantage.
• Solid understanding of distributed and microservices-based architectures.
• Strong expertise with relational databases (MySQL, PostgreSQL, or similar), including schema design, query optimization, and performance analysis.
• Experience working with stored procedures, database functions, and complex SQL is highly desirable.
• Experience with Apache Kafka
• Experience analyzing large legacy codebases and understanding complex business logic.
• Hands-on experience with reverse engineering existing systems is a strong plus.
• Experience participating in system design, architecture discussions, and technical decision-making.
• Strong analytical mindset and excellent problem-solving skills.
• Ability to work independently with limited project documentation.
• Hands-on experience with Azure Cloud
• Upper-Intermediate or higher English level.
• Experience working in Agile / Scrum / Kanban
• PHP and MSSQL stored procedures experience is a significant advantage.

Nice to Have

• Experience with AI-assisted development tools (Copilot, Claude, Cursor)
• Background in SaaS, multi-tenant platforms, or large-scale B2B portals

Responsibilities

• Lead technical delivery, owning architecture and code quality
• Design, develop, and review TypeScript code for backend and frontend systems
• Align with Client engineering leadership on technical direction and delivery
• Break down epics into technical tasks, drive estimation and sprint planning
• Mentor engineers through pair programming, code reviews, and technical guidance
• Drive AI adoption by onboarding teammates to AI tools and practices
• Identify and unblock technical risks early; escalate delivery concerns proactively
• Participate in Agile ceremonies and Client governance cadence
• Contribute to Roadmap planning, risk identification, and dependency management

We offer*:

• Flexible working format - remote, office-based or flexible
• A competitive salary and good compensation package
• Personalized career growth
• Professional development tools (mentorship program, tech talks and trainings, centers of excellence, and more)
• Active tech communities with regular knowledge sharing
• Education reimbursement
• Memorable anniversary presents
• Corporate events and team buildings
• Other location-specific benefits

*not applicable for freelancers

RAYTON is a leading Ukrainian energy engineering group specializing in commercial solar power plants and Battery Energy Storage Systems (BESS). We design and deliver turnkey energy solutions that help businesses achieve energy independence across Ukraine, Europe, the United States, and the Middle East.

With over 2,500 completed projects, RAYTON has established a strong track record of delivering energy solutions for major companies, including OKKO, KyivGuma, and Velmart, using Tier-1 equipment.

As we continue to expand our energy solutions and energy storage business, we are looking for a Full-Stack Developer (Middle Strong) to join our team and contribute to the development of software solutions supporting our technical and business operations.

About the Role

Mandatory

Proven commercial experience working in a manufacturing or industrial company is required. Candidates must have practical experience in a production environment, ideally involving industrial equipment, manufacturing processes, equipment monitoring, or production data analytics

We are developing an internal web platform for real-time monitoring and data analytics, with IoT integrations and a high volume of time-series data.

This is an engineering-oriented role: most of the work involves calculations, data processing and equipment configuration logic rather than typical CRUD or e-commerce features.

Key Responsibilities

— Develop and maintain backend services and APIs using Python and FastAPI (async).

— Implement calculation and optimization logic based on technical specifications with formulas, constraints and acceptance test cases.

— Process and validate time-series data from equipment (gaps, duplicates, units, time zones).

— Develop configuration and settings management for equipment parameters, with validation and audit trail.

— Build and improve frontend applications using React and TypeScript, including dashboards and time-series charts.

— Work with relational databases: data modeling, query optimization on large tables, and schema migrations.

— Implement real-time features using MQTT and WebSockets.

— Verify calculation results against reference data and cover them with regression tests.

— Work closely with engineers to translate technical requirements into reliable code.

Preference will be given to candidates with experience in Industrial IoT, SCADA/monitoring systems or industrial automation.

Requirements

3+ years of commercial experience with Python; solid experience with FastAPI.

— Experience implementing calculation-heavy or algorithmic business logic (not only CRUD).

— Ability to read technical specifications with formulas and turn them into tested code.

— Attention to numerical correctness: units of measurement, rounding, precision, edge cases.

— Strong SQL skills and practical experience with SQLAlchemy; MySQL/MariaDB preferred.

— Experience optimizing queries on large datasets (tens of millions of rows).

— Experience processing and validating time-series data.

— Experience handling dates and time zones correctly (UTC storage, local time display, daylight saving time transitions).

— 2+ years of experience with React and TypeScript.

— Experience with Docker and Linux environments.

— Knowledge of MQTT and WebSockets.

— Responsible approach to production systems: safe migrations, environment separation, secrets management.

— Good English for technical documentation and code.

— Strong problem-solving skills and ability to work independently.

Who we are

FansCreator (fanscreator.ai) is an unrestricted AI image and video generation platform. Today our main customers are creators and agencies, but the platform isn't limited to them. We're profitable, growing 30% month over month, and our founders have sold three businesses for seven figures and more.

The work

We're hiring a senior full-stack engineer to become the main person who knows the system end to end. You'll build customer features from 0 to 1 in Python (FastAPI) and TypeScript (React). You'll also harden payments, security and compliance.

What you'll do

• Build customer features from 0 to 1 in Python, TypeScript and React, and keep them working in production. Make the data accurate and the interface clear.
• Investigate production problems using logs, metrics and the actual request and job flow. Identify who is affected, contain the problem and verify the fix.
• Keep payments correct: payment orchestration, checkout, recurring charges, payment webhooks, refunds and chargebacks.
• Keep AI render jobs reliable. Handle retries, duplicate events, slow providers and worker failures without losing data or letting one account hold up everyone else.
• Harden security: separation between workspaces, roles and permissions, webhook signatures. Protect our APIs against abuse.
• Improve database queries, worker capacity and scheduling based on measurements. Add tests for the failures we cannot afford to repeat.
• Challenge a decision when you think we're solving the wrong problem. Explain the alternative and its tradeoffs.

Security issues, payment errors and incorrect customer data take priority. We agree with the team which product work comes next.

What we need from you

• You have 3+ years shipping and maintaining Python applications (FastAPI or Django) with real users, and you're comfortable building in TypeScript and React.
• You have operated queue or worker systems in production. You understand concurrency, retries, duplicate execution, backpressure and how databases and external services limit throughput.
• You have built payment integrations: payment orchestration, hosted checkout, recurring charges, webhooks, refunds and chargebacks.
• You can describe a production incident you personally investigated, the evidence that led to the cause and how you proved the fix worked.
• You check that data means what the product says it means. Missing information, failed requests and legitimate zero values need different handling.
• You use AI regularly and can show how it improves your work. You verify its output and understand the code you ship.
• You investigate problems independently, keep the team informed and raise blockers early. You know when to involve someone else in a decision.
• Strongly preferred: hands-on production work with generative image and video APIs: async render jobs, LoRA fine-tuning, video processing with ffmpeg.

• Preferred: production experience with generative image/video APIs and the checks around them (moderation, face verification, output quality).

   

Your own projects count as much as years. A product you built and shipped yourself tells us as much as time in a job.

Nice to have

Published SDKs, OpenAPI, MCP tools, security testing, PostHog, experience with creator platforms or comfort with the adult creator industry. Public code is welcome; confidential commercial work also counts if you can explain your contribution.

How we work

We're a small team. We work asynchronously and review progress weekly. Keep the team informed about decisions, blockers and incidents. We care about work reaching customers and continuing to work after release.

We will discuss working-hour overlap, incident coverage, response expectations and any on-call arrangement before an offer.

How we hire

A debugging exercise, a 30-minute technical walkthrough, then a decision. You have six-seven 🤷‍♂️ hours, including setup. The process usually takes under two weeks. You can use AI throughout; we'll ask you to explain your code and decisions.

Are you passionate about technology and eager to kickstart your career in software development? Join our dynamic team at DICEUS as an Intern Full Stack Developer and gain hands-on experience in a professional tech environment.

You’ll be contributing to the development of a modern solution tailored for the insurance industry - designed to optimize operations and enhance customer engagement through advanced technologies like cloud computing and AI.

What You’ll Be Doing:

• Assisting in the development of scalable web applications (both front-end and back-end) under the guidance of experienced mentors.
• Learning and working with back-end technologies such as .NET (C#) and front-end frameworks like Angular.
• Building responsive user interfaces with Angular and integrating them with back-end APIs.
• Exploring Azure Cloud and understanding how modern apps are deployed and maintained.
• Supporting the implementation of API integrations and other software components.
• Engaging in internal team discussions and learning sessions to broaden your knowledge base.

What We Expect From You:

• Basic understanding of programming concepts in .NET (C#) and front-end fundamentals (HTML, CSS, JavaScript/TypeScript).
• Familiarity with or strong interest in Angular (or other modern front-end frameworks).
• Curiosity about cloud services, web technologies, and how real-world systems work end-to-end.
• Willingness to learn, grow, and take feedback constructively.
• Good communication and team collaboration skills.
• Currently studying or recently graduated in Computer Science or a related field.

What We Offer:

• Hands-on experience with cutting-edge technologies in a professional environment.
• Mentorship and guidance from experienced developers.
• Exposure to real-world full stack development processes in the insurance tech space.
• A collaborative and innovative work culture that encourages learning and growth.
• The opportunity to become a Junior Full Stack Developer after successfully completing the internship period.

Sounds like your kind of challenge? Apply now and let’s start your tech journey together!

We are looking for a Middle/Senior Full-Stack Developer with strong Python/Django and SQL expertise to help develop and maintain a web application for migrating reporting functionality from Oracle APEX.

Our client is a leading Ukrainian bank undergoing significant digital transformation. The team is working on modernizing reporting solutions and migrating existing reporting functionality from Oracle APEX to a Python/Django-based web application. The role combines backend and frontend development with database analysis, reporting, dashboard development, and performance optimization.
 

Responsibilities:

• Analyze existing Oracle APEX reports, dashboards, SQL queries, and business logic.
• Develop and maintain backend functionality using Python and Django.
• Develop web interfaces using Django Templates, HTML, CSS, and JavaScript.
• Build interactive dashboards, tables, charts, and calculated metrics.
• Implement data filtering, search, sorting, grouping, and pagination.
• Develop report generation and export functionality in XLSX, CSV, and PDF formats.
• Migrate and implement user roles, authentication, authorization, and access control for reports and data.
• Analyze and optimize SQL queries and overall application performance.
• Connect Django applications to Oracle Database and work with Oracle SQL and PL/SQL.
• Validate migrated functionality and ensure data consistency between Oracle APEX and the Django application.
• Develop and integrate REST APIs, preferably using Django REST Framework.
• Document implemented functionality and support further development of the solution.

Requirements:

• Strong Python skills and hands-on experience developing web applications with Django.
• Commercial experience with Django backend and frontend development.
• Strong knowledge of Django ORM and experience optimizing database queries.
• Solid SQL skills and practical experience with Oracle Database.
• Good understanding of PL/SQL.
• Experience analyzing Oracle APEX applications, reports, dashboards, SQL queries, and business logic.
• Experience integrating Django with Oracle Database, preferably using python-oracledb.
• Experience developing interactive dashboards, tables, charts, filters, and calculated metrics.
• Strong HTML5, CSS3, and JavaScript skills.
• Experience implementing search, sorting, filtering, grouping, and pagination.
• Experience with data visualization libraries such as Chart.js, Apache ECharts, or similar.
• Experience generating and exporting reports in XLSX, CSV, and PDF formats.
• Understanding of authentication, authorization, role-based access control, and data access restrictions.
• Experience developing and integrating REST APIs.
• Experience optimizing web application performance and SQL queries for large datasets.
• Experience with Git.

Nice to have:

• Experience with Django REST Framework.
• Experience with PostgreSQL.
• Experience with Oracle APEX migration or modernization projects.
• Experience working with enterprise reporting or business intelligence applications.

We offer*:

• Flexible working format - remote, office-based or flexible
• A competitive salary and good compensation package
• Personalized career growth
• Professional development tools (mentorship program, tech talks and trainings, centers of excellence, and more)
• Active tech communities with regular knowledge sharing
• Education reimbursement
• Memorable anniversary presents
• Corporate events and team buildings
• Other location-specific benefits

*not applicable for freelancers

Who we are

Vista Auction is an online auction for returned and overstock goods. Items go up for auction in our mobile app, people bid, and winners pick up at our warehouses near Charlotte, North Carolina.

We serve more than 55,000 customers a month, sell over 25,000 items a day, and take more than 7 million bids a month. And we're just getting started!

We run our own warehouses and build our own technology, so everything a customer experiences, from the first bid to the pickup counter, is ours to make better.

The Platform Team

The Platform Team is a group of engineers and product people across the US and Europe that owns the whole Vista Auction platform: the mobile app and website, the auction engine, the warehouse and pickup systems, and the internal tools and AI agents. 

It is led by our Head of Engineering, who works directly with the founder. An idea can ship and be measured in days.

You will join the team as a fullstack developer. You are responsible for the API and the app. The same person who writes the endpoint ships the screen.

The team is universal. Engineers pick up each other's work across the warehouse API, the warehouse app, and the customer app, whichever part the release needs. You do the same. Stack on that work is Python and Django on the API, Kotlin on the warehouse app, and Flutter on the app customers use. You ship in small releases. 

AI is part of how this team builds: you are expected to use it every day and to know when the output is ready to merge.

What You'll Do

• Own the feature on both sides.
• Turn a product idea into a release in days. Keep the change small enough to ship, watch the result, and follow with the next one.
• Use AI to move faster. 
• Pick up work another engineer started, and leave yours in a state someone else can finish. The team covers the API and both apps together.
• Leave the system clearer than you found it. Tests on the logic you add, and a change another engineer can review quickly.

What You'll Bring

Must have:

• Production experience with Python, Django, and Django REST Framework. You have designed endpoints, validation, and PostgreSQL queries yourself.
• Mobile experience in Kotlin (Android), Flutter, or both. You are ready to take the app side of a feature, on the warehouse app or the customer app, next to the API.
• Daily use of AI coding tools, with a clear sense of where they help and where they waste time. You review generated code before it ships.
• A habit of small, frequent releases. 
• About 3 to 5 years of commercial development.

• You work directly with engineers and product, and you write changes that are easy to review.

   

Nice to have:

• Celery on RabbitMQ, Redis, and Docker in a real deployment.
• React and TypeScript.

• A mobile release process you have run yourself: build, test, ship.

   

What we offer

• You are responsible for the API and the app. A small universal team.
• Real customers, real numbers, fast.
• AI is part of the job, with the expectation that you use it well and stay responsible for what merges.
• Growth with the team.

We are looking for 🚀 Fullstack Engineer 🚀 who enjoys learning, building, and switching between projects.
 

💻 Responsibilities:
• Advanced backend and frontend development (TypeScript / Node.js / Next.js / React)
• Build and maintain GraphQL and REST APIs
• Integrate with third-party platforms (CRM, ERP, headless CMS, search, auth, marketing)
• Build serverless and event-driven workflows on AWS
• Mentor / coach other team members
• Code reviews and refactoring, with a focus on code quality and security
• Analyze and solve advanced problems in production
• Fix bugs, follow them up and find workarounds; spot pain points in the platform
• Own the performance and reliability of services in the cloud
• Write technical specifications and implementation plans when needed
• Automate and optimize repetitive tasks, including with AI agents
 

⚙️ Required skills:
• 3+ years of experience in JavaScript / TypeScript fullstack development (Node.js / Next.js / React)
• Skilled at building and consuming APIs: GraphQL (Apollo, Federation) and REST
• Comfortable building SSR/SSG/ISR web applications
• Solid SQL skills, including query optimization
• Experience with AWS (serverless, containers / Kubernetes, monitoring, CDN)
• Infrastructure as Code (Terraform or similar)
• Git workflows with multi-environment promotion and CI/CD pipelines
• Automated testing (unit and end-to-end)
• Good knowledge of accessibility (a11y), SEO best practices, semantic HTML and metadata
• Daily, hands-on use of AI coding tools
• Great analytical skills, adaptability and responsiveness
• Fluent in English
• Team player
 

🤖 AI tools we use:
• AI coding agents (Claude Code) and AI-assisted IDEs (Cursor)
• Shared, team-maintained agent skills and specialized subagents for everyday engineering tasks
• MCP integrations that connect AI agents to issue tracking, source control, team chat and observability tools
• Spec-driven development with AI (spec, then plan, then tasks)
• LLM-powered product features built on cloud AI services
• We expect engineers to use these tools well, help improve shared skills and prompts, and critically review AI-generated code.
 

⭐ Nice-to-have:
• Experience with CRM or ERP platform development (e.g. Salesforce, NetSuite)
• Experience with a headless CMS
• Experience with a hosted search engine (e.g. Algolia)
• React Native
• Vue / Nuxt
• C# / .NET
• Python and data platforms
• Tailwind CSS, UI libraries (Radix UI, Material UI)
• Observability tools (error tracking, log management, alerting)
• i18n in Next.js
 

🤝 Interview process:
1. Intro-call with the Recruiter.
2. Technical Interview.
3. Test Task
4. Client Interview.

💎 Benefits:
• Full remote work and meetings for brainstorming.
• Freedom and flexibility.
• A team of top experts and synergy of the entire organization.
• Competitive salary.
• Vacation and sick leaves.
• Therapy sessions with our psychologist.
• Budget for professional development.
• Corporate events and team building.

Mirko Solutions is an international IT company specializing in web and mobile development for clients in the US, Canada, EU, and Australia. We deliver high-quality digital solutions including web applications, mobile apps, cloud systems, and custom software for businesses worldwide.

Due to the rapid growth of our company, we are currently looking for an experienced Middle Fullstack Developer (Node.js + React) to join our team and work on a new international project in our Tallinn office.

Responsibilities:

• Develop and maintain scalable backend and frontend functionality
• Build and integrate REST APIs and third-party services
• Develop backend services using Node.js
• Build and maintain frontend applications using React
• Work with databases and complex business logic
• Investigate and fix production and integration-related issues
  Participate in code reviews and technical discussions
• Collaborate with QA, Team Leads, and other developers during feature delivery

Requirements:

• 3+ years of commercial software development experience
• Strong hands-on experience with Node.js
• Solid experience with React
• Good knowledge of TypeScript
• Experience designing and integrating REST APIs
• Experience with SQL and relational databases
• Experience with Git and Docker
• Understanding of CI/CD practices
• Good understanding of software development principles and best practices
• Good command of English
• Ability to work from our Tallinn office

We offer:

• Opportunity to work on an international project
• Professional growth and development
• Friendly and supportive team environment
• Collaboration with experienced international teams

We’re looking for an AI-forward Full-Stack Developer to help build a platform focused on international payments, crypto infrastructure, and blockchain integrations.

The platform connects third-party services, payment infrastructure providers such as Bridge, and blockchain-based systems. The product involves API integrations, stablecoin-related functionality, on-chain interactions, and reliable data processing.

We’re looking for someone passionate about developer platforms, experienced in integrating external APIs into real-world products, and enthusiastic about using Claude and other AI-powered tools to build software faster and more effectively.

Responsibilities

• Build and maintain full-stack applications using Node.js, TypeScript, React, and Next.js.
• Develop backend services and REST APIs using Express.js.
• Integrate third-party APIs for international payments, financial services, and crypto infrastructure.
• Work with providers such as Bridge and similar payment and stablecoin infrastructure services.
• Implement blockchain integrations, on-chain interactions, and crypto-related workflows.
• Design and maintain MongoDB schemas and data models.
• Build responsive frontend interfaces and connect them to backend services.
• Implement webhooks, asynchronous workflows, transaction status tracking, and error handling.
• Deploy, maintain, and monitor applications on AWS.
• Use Claude and other AI-powered development tools throughout the development lifecycle.
• Contribute to architecture decisions, code quality, and developer experience.

Requirements

• Strong experience with Node.js and TypeScript.
• Hands-on experience with React and Next.js.
• Experience building backend services and APIs with Express.js.
• Practical experience with MongoDB and database-driven applications.
• Experience integrating third-party APIs into production products.
• Familiarity with AWS and cloud-based application deployment.
• Understanding of REST APIs, webhooks, authentication, and asynchronous processing.
• Knowledge of crypto, blockchain fundamentals, and on-chain transactions.
• Experience using Claude or similar AI coding tools as part of everyday development.
• Ability to work independently, solve technical challenges, and deliver features end to end.

Nice to Have

• Experience with fintech, international payments, or cross-border payment systems.
• Previous integrations with Bridge or similar payment and crypto infrastructure providers.
• Experience with stablecoins, crypto wallets, blockchain APIs, or smart contracts.
• Familiarity with Ethereum and EVM-compatible networks.
• Experience with AWS services, background jobs, queues, and distributed systems.
• Experience building developer platforms, public APIs, or SDKs.

Who We’re Looking For

We’re looking for an AI-first engineer who actively uses Claude to research, implement, debug, and improve code while maintaining a strong understanding of the systems being built.

You’re passionate about developer platforms and enjoy making complex integrations simple and reliable. You can move comfortably between frontend and backend development, connect external services, and build practical solutions involving payment systems and blockchain infrastructure.

You value speed, ownership, and maintainable code over unnecessary complexity.

What We Offer

• The opportunity to build a product at the intersection of international payments, crypto, and blockchain.
• An AI-first development workflow using modern tools such as Claude.
• A lean team, direct communication, and ownership of technical decisions.
• The opportunity to work on real-world financial infrastructure and API integrations.

If you enjoy full-stack development, API-driven products, crypto infrastructure, and AI-assisted engineering, we’d love to hear from you.

Intetics Inc., a leading American technology company specializing in custom software application development, distributed professional teams creation, software product quality assessment, and “all-things-digital” solutions, is looking for a Senior Full-Stack PHP Developer (Laravel + React/Vue) to join its innovative team.


Project Responsibilities

Build and maintain scalable, full-stack web applications using Laravel on the back end and React/Vue on the front end
Contribute to architecture decisions for applications built to scale: service design, data modeling, caching, and queue-based processing
Design and build RESTful APIs and integrations with internal and third-party systems
Develop reusable Laravel packages and front-end components shared across projects
Own quality and performance: refactor legacy code, optimize queries, and improve response times
Write automated tests and take part in code reviews and CI/CD improvements
Document technical decisions, APIs, and specifications
Work with product, design, QA, and engineering teams to scope and deliver features
Ensure software development best practices and timely delivery of product functionality


Candidate's Portrait

We're looking for a full-stack developer who owns features end to end, from database design and APIs to the React/Vue interface users actually interact with. You'll build and scale business-critical web applications, working closely with product, design, and QA teams to transform requirements into reliable, maintainable, and high-performing software. We value engineers who understand the bigger picture, question unclear requirements early, and care about long-term maintainability as much as delivery.

Must-haves:
5+ years of professional experience with modern OOP PHP (8.x)
3+ years of hands-on experience with Laravel
Strong knowledge of the Laravel ecosystem: Eloquent, Queues, Jobs, Events, Service Container, Middleware, Authentication
3+ years of production experience with React or Vue
Strong TypeScript and modern JavaScript skills
Experience designing RESTful APIs, including authentication, validation, and error handling
Solid SQL skills (MySQL or PostgreSQL)
Experience with schema design, indexing, and query optimization
Hands-on experience with Redis and queue-based architectures
Experience with automated testing (PHPUnit, Pest, Jest, Vitest, or Playwright)
Comfortable with Git-based workflows, pull requests, and CI/CD pipelines
Experience working in AI-assisted development environments (Copilot, Cursor, Claude Code, etc.)
Strong analytical and problem-solving skills
Good written and spoken English


Nice-to-have:
Inertia.js, Livewire, or Next.js/Nuxt
Tailwind CSS
Docker and cloud infrastructure (AWS, Forge, Vapor)
Static analysis tools (PHPStan, Larastan)
Code quality and formatting tools (Pint)
Real-time features (WebSockets, Reverb)
RabbitMQ or other message brokers
Microservices architecture experience
Experience with event platforms
Experience with ticketing systems
Experience with payment integrations (Stripe, PayPal)

We are looking for a Mid/Senior Fullstack Engineer to join the insurance division of a large Polish software company. This is a true fullstack role: you will build both the Java/Spring Boot backend services and the Angular frontend of in-house platforms used by insurers in Poland and abroad. The platforms cover the full policy lifecycle and claims handling and process millions of operations every month. You will work in an international team with colleagues from Scandinavia, Belgium and Poland, on modules such as financial settlement, accounting, investment funds and claims. The team works in a Spec Driven Development model with AI agents, using them for specs, planning, documentation and tests. This role suits an engineer who has shipped real production code on both sides of the stack and wants to work on large, business-critical systems.

Details:

• Schedule: Full time
• Location: Hybrid – Kraków, Gdańsk, Łódź or Poznań, Poland (3 days in the office, 2 remote; more office time during onboarding, up to 3 months)
• Start: ASAP
• Duration: Long-term
• English: Upper-Intermediate (B2)
• Polish: Elementary (A2) or higher
• Type of collaboration: Internal Employment (UoP) or B2B Contract – your choice

About the project:
The company is one of the largest software vendors in Poland. Its insurance division builds its own platforms for insurance companies in Poland and other European markets. These systems support the whole policy lifecycle, from product setup and sales to policy servicing and claims processing. They handle millions of operations a month, so performance, reliability and data accuracy really matter. The division is growing fast and is adding engineering teams in several Polish cities. Teams are international and work closely with business analysts and insurance domain experts. Engineering is moving toward structured, AI-assisted development, where AI agents support specs, planning, documentation and testing.

You have:

• 4+ years of commercial software development experience
• Strong experience with Java (21+) and Spring Boot in production systems
• Experience designing and building REST APIs
• Hands-on commercial experience with Angular (ideally recent versions) and TypeScript: you have written and shipped Angular code yourself, not only worked next to frontend developers
• Experience with MongoDB and/or PostgreSQL
• Structured use of AI tools in development (specs, planning, tests), not only autocomplete
• Polish at A2 level or higher (everyday conversation), as some teams work in Polish
• English at B2 level (team communication and technical documentation)
• Legal right to work in Poland (e.g. Karta Pobytu, permanent residence or EU citizenship)
• Readiness to work from the office in Kraków, Gdańsk, Łódź or Poznań 3 days a week

Nice to have:

• Experience in the insurance, banking or fintech domain
• Experience with microservices, event-driven architecture (Kafka), sagas or DDD

What to do:

• Build and maintain backend services in Java 21+ and Spring Boot for insurance platforms
• Develop Angular frontend features end to end, from UI components to integration with backend APIs
• Design and implement REST APIs and work with MongoDB and PostgreSQL databases
• Work on business modules such as financial settlement, accounting, investment funds and claims
• Use AI agents in a Spec Driven Development process to write specs, plan work, document solutions and create tests
• Collaborate with an international team (Scandinavia, Belgium, Poland), business analysts and domain experts
• Take part in code reviews and help keep code quality high across the stack
• Help improve the performance and reliability of systems that process millions of operations a month

CoreWillSoft GmbH is a German-based company working on secure IoT software solutions and services. The mission of CoreWillSoft is to help businesses protect their assets, employees, and data by providing advanced software solutions and services in the security industry. 

We are looking for a Full-Stack Software Engineer with strong backend experience in Kotlin/Java and either: 

• solid Frontend (React) expertise, or 
• experience in Kotlin Multiplatform / Android development 
   

You will work on products used by businesses across Western Europe and North America. 

Our team operates in a scaled agile approach across Europe with a headquarter in Bonn, Germany. It is responsible for the complete software development lifecycle; including ideation, implementation, and operation of the secure IoT software operating smart buildings and smart homes across the world. 

This is an exciting opportunity to work on cutting-edge projects involving high-security hardware and technology in a creative, international environment. 

We offer: 

• Meaningful Impact: Build solutions that are used every day by thousands of businesses your work will directly improve real-world security and connected device experiences.  
• Product & Process Ownership: Help shape not only the product, but also how we build and deliver it  your ideas and decisions will have visible impact.  
• Industry Influence: Contribute to key security standards and best practices, staying ahead of the curve in a fast-evolving industry.  
• Modern Tech Stack & Hardware: Work with the latest hardware and the tools you need to do your best work.  
• Time Off & Flexibility: Vacation days, paid sick leave, and public holidays in line with German legislation plus flexibility built around outcomes, not micromanagement.  
• Learning & Development Budget: We support continuous growth by covering hard and soft skills courses, trainings, and access to e-learning platforms.  
• Coworking Support: Prefer not to work from home every day? We offer coworking compensation so you can choose the environment that fits you best.  
• Language Learning Support: Monthly fixed compensation you can use to improve your English or German through the learning format of your choice.  
• Strong Team Culture: Open collaboration, a flat structure, and thoughtful onboarding your voice is heard, and you can make an impact from day one. 

Your skills: 

Backend: 

• Proficiency in Kotlin and/or Java for backend development.  
• Strong experience with Spring Boot framework.  
• Experience with Docker and containerized applications.  
• Familiarity with cloud platforms such as AWS, Azure, or Google Cloud.  
• Experience in designing and consuming RESTful APIs.  
• Knowledge of microservices architecture and patterns.  
• Experience with on-premise and cloud-based deployments.  
• Proficiency in secure coding practices and understanding of security best Ko practices for backend systems.  
• Familiarity with scalability strategies and performance optimization in backend services.  
• Knowledge of monitoring and observability tools (e.g., Prometheus, Grafana, ELK).  
• Knowledge of cryptography and security  
• Familiarity with CI/CD processes, including GitHub Actions, GitLab CI, or similar tools.  
• Experience with version control systems (e.g., Git).  

• Experience with database technologies, both relational (e.g., PostgreSQL) and NoSQL (e.g., MongoDB). 
  
  Frontend (one of the following paths is required) 

  Option 1 – Web Frontend: 

• Strong experience with React.js or Angular or Vue 
• Solid knowledge of TypeScript / JavaScript, HTML5, CSS3 
• Experience with modern tools (Vite, Webpack, npm, etc.) 

• Understanding of state management (e.g., Redux) 

  
  Option 2 – Mobile / Multiplatform: 

• Experience with Kotlin Multiplatform and/or Android development 
• Strong knowledge of Kotlin Coroutines and Flow 
• Experience with Jetpack Compose (or Compose Multiplatform) 
• Familiarity with dependency injection frameworks (e.g., Koin) 
• Experience with networking libraries such as Ktor

Nice to have: 

• Experience with Kotlin Multiplatform in production 
• Knowledge of modern Kotlin ecosystem (Coroutines, Flow, Compose, Koin, Ktor) 
• Knowledge of additional programming languages 
• Experience with system architecture and distributed systems 
• Understanding of UI/UX design and performance optimization 
• Knowledge of building automation or access control systems 

We're seeking a talented Full-Stack Developer to build modern SaaS products using Next.js, React, Node.js, and PostgreSQL for clients in the US and Europe. If you're comfortable working across the stack and enjoy turning product requirements into reliable features, we'd love to hear from you!

Core Competence:

• At least 3 years of professional experience in software development, with strong TypeScript, React, and Next.js skills.
• Hands-on experience with Next.js App Router, server components, and modern React development.
• Strong Node.js backend experience with NestJS, Express, or a similar framework, including REST API design.
• Solid knowledge of PostgreSQL and experience with ORMs such as Prisma, Drizzle, or TypeORM.
• Experience implementing authentication, role-based access, payments, third-party integrations, and multi-tenant functionality.

• Experience with automated testing using Jest, Playwright, Cypress, or similar tools, together with Git-based development workflows.

   

Preferred Qualifications:

• Experience with Supabase, including Auth, Row-Level Security, and Edge Functions.
• Practical experience with Vercel, AWS, and CI/CD.
• Experience integrating Stripe, including Stripe Connect and webhooks.
• Experience adding LLM-powered features using OpenAI, Claude, or similar APIs.
• Experience with React Native or Expo is an asset.

• Upper-intermediate level of English for clear and effective communication with international clients.

   

What We Offer You:

• Competitive compensation aligned with your skills, experience, and career ambitions.
• An innovative work environment where you can build production SaaS and AI-powered products using a modern technology stack.
• Direct communication with clients from the US and Europe and the opportunity to participate in product and technical discussions.
• Long-term cooperation with opportunities to move between projects and continue growing with the team.

In one line
We’re looking for a senior engineer who builds software by directing AI agents rather than typing code, and who can lead a production SaaS platform that way.
 

About the project
The project is a SaaS platform for culture-first hiring. It matches candidates on skills and cultural fit using psychometric profiling, a matching engine and AI-assisted assessment. The product is built and about to launch with its first pilot customers.
 

How we build: fully AI-native
The project has been built from day one with Claude Code as the main development tool. Agents write most of the code. Humans set direction, define the rules, review the output and own the result.

Concretely, the codebase has:

• CLAUDE.md files and binding playbooks (security, frontend architecture, styling) that agents must follow
• About 20 custom Claude Code skills for planning features, backend and frontend development, testing, security review, CI, dependency audits and more
• Hooks and guardrails, for example blocking agent commits to protected branches
• Parallel agents running in separate git worktrees
• MCP integrations: Playwright for visual and end-to-end testing, Jira (the roadmap syncs to Jira through Claude), Claude Design, and an accessibility checker
   

The new hire won’t just use this setup. They’ll own it, improve it, and decide how future engineers and agents work together.
 

The role
This a lead technical hire. The person drives the platform from pilot to production and owns its technical quality. They’ll work closely with the team, who also builds with Claude Code daily. We want someone who takes real ownership and pushes back, while the team keeps the final say on product direction.
 

What they’ll own

• The AI-native workflow: skills, playbooks, hooks and agent orchestration, and making the agents produce better output over time
• Judgment over agent output: reviewing AI-written code at scale, catching what drifted, and blocking what shouldn’t be merged
• Production: taking the platform live and keeping it running (deploys, monitoring, incidents)
• Security and GDPR-safe handling of sensitive candidate data
• LLM features in the product: evals, consistency, cost, prompt-injection defence and fallbacks
• Pilot feedback: turning it into scoped work
   

Must-haves

• Builds with Claude Code or a comparable agentic tool as their primary way of working, every day, for at least 6 months
• Has written their own CLAUDE.md files, skills, subagents or MCP setups, and can show them
• Can explain where agents fail and how they guard against it (tests, review, constraints, isolation)
• 7+ years in web development, with senior or lead responsibility for a SaaS product in production
• Strong TypeScript, React and Node; solid PostgreSQL. Agents write the code, but the lead has to know when it’s wrong.
• Has shipped LLM features to real users
• Pragmatic, with business sense and a startup mindset
• Excellent English and clear async communication
   

Not a fit

• “AI experience” means Copilot autocomplete or pasting into ChatGPT
• Uses AI only for boilerplate and writes the “real” code by hand
• Accepts agent output without reading the diff or running it
   

Nice to have
HR tech, recruitment or ATS experience; GDPR or EU AI Act exposure; security hardening; BullMQ, Prisma, Railway or Vercel; experience mentoring or leading.
 

Stack
React 19, Vite, Fastify 5, Prisma, PostgreSQL, Redis/BullMQ, TypeScript, Vitest, Playwright, Vercel, Railway, Anthropic models via the Vercel AI SDK.
 

Setup

• Fully remote
• Full-time and long-term
• Contract: B2B only. The candidate must have their own registered business and invoice us directly every month.
• No employment contract, and no invoicing through an agency or outsourcing company