Fullstack Developer

🏢 Summary: Senior frontend/full-stack developer role focused on building resilient, enterprise-ready product features for a sports and health platform. The position involves React, TypeScript, Next.js, REST APIs, PostgreSQL, and close remote collaboration, with a hybrid schedule in Kraków. 🗂️ Requirements: 5+ years of professional development experience, Production experience with React and TypeScript, Production experience with Next.js App Router, REST API and data-validation experience, PostgreSQL and ORM experience, Ability to follow architectural documentation and team conventions, Git, code review, and Jira experience, Independent problem analysis and written feature planning/ADRs, Careful handling of healthcare data, schemas, and access logic, Strong written technical communication, Remote and asynchronous collaboration skills, Advanced English, Ability to complete a technical coding test without assistance, Availability to start within one month, Ability to work from the Kraków office 3 days per week 📃 Skills: React, TypeScript, Next.js, REST, Zod, PostgreSQL, Drizzle, Prisma, TypeORM, Git, Jira, Claude 🏢 Description: About the role You will be assisting in the understanding of, architecture, implementation, and quality of core Product Roadmap items intended to drive the project for our client forward. The ability to work with the team and collaborate is essential. You will have an immediate impact and be an early figure in the company today to help drive our growth. You will focus on solidifying our product and making it resilient as well as learning how to roll out enterprise-ready features. Required skills /knowledge and production experience/ React + TypeScript Next.js (App Router) — routing, server/client components, API routes REST API, data validation (example - Zod) PostgreSQL and ORM (Drizzle or similar — Prisma/TypeORM) Work according to the team's conventions and architectural documentation(ADR-y) — the ability to read and follow established standards before writing code Git, code review, ticketing (Jira) Coding with Claude /on daily basis/ Minimum of 5 years of professional experience developer with hands-on skills. Communication and other required skills Git, code review, ticketing (Jira) Independence in problem analysis and a willingness to plan before implementation (the project requires a written plan/ADR before each new feature). Accuracy and attention to detail—working with healthcare data requires caution when changing the schema and access logic. Good written communication—documentation, PR descriptions, tickets, and code review comments. Comfortable working in a distributed/remote team and asynchronous communication. Openness to feedback and a willingness to propose simpler solutions instead of over-engineering (the project explicitly avoids over-engineering). Sense of responsibility (ownership) for the delivered functionalities from design to implementation. Advanced English - hard must - daily calls with native CTO or CEO(weekly) . Ability to discuss technical problems, describe concept, architecture or planned feature. There's going to be (online or onsite in Krakow) technical coding test (without extra help) and English general and/or tech conversation. Awesome but not a must: Supabase (Auth, RLS, Postgres) AWS: S3, SQS, Lambda - designing or integrating with data processing pipelines (multipart upload, task queuing, workers) Terraform / IaC - ability to read infrastructure definitions (no need to write them yourself) Working with video / media data / large-volume files (e.g., recording processing, LiDAR, wearable data) Designing permission systems (RBAC) for multiple user roles OpenAPI / API contracts, documenting endpoints Experience in health, sports, telemedicine, or other sensitive/regulated data Application observability (Sentry, PostHog, or similar) Real-time integrations (chat/video SDKs like CometChat, WebSocket) Our benefits: Awesome and highly intense product /sports and health/ Private medical care and multisport card Flexible working hours (you can start between 8:00 -10:00 a.m.) Your choice of computer: Mac OS/Linux/Windows Upskilling budget English discussion classes every week Parking spot few mins from office Employee recommendation program. 🟢 The office is based in Kraków. We work 3 days from the office a week. 🟢 The process consists of 2 stages. We recruit remotely :) Ideal candidate should start within a month (no longer).

🏢 Summary: Opportunity to design and build secure application services and APIs, lead technical design, and resolve complex production issues. The role emphasizes reliability engineering, independent ownership, and cross-team collaboration using Python, web frameworks, cloud infrastructure, and DevOps tooling. 🗂️ Requirements: Strong Python and object-oriented programming skills, Hands-on Django or FastAPI experience, Hands-on TypeScript framework experience, RESTful API design expertise, CI/CD and DevOps tooling experience, GCP, Kubernetes, Terraform, and Helm experience, Relational database experience, Spoken English proficiency 📃 Skills: Python, Django, FastAPI, TypeScript, Angular, NestJS, REST, Jenkins, GitHub, GitLab, GCP, Kubernetes, Terraform, Helm, PostgreSQL 🏢 Description: 10+ Years of Experience is required Roles and RESPONSIBILITIES Design and build secure application services and APIs. Drive technical design discussions and translate requirements into robust solutions. Troubleshoot complex production issues and lead root-cause analysis. Improve service reliability and resilience through proactive engineering practices. Work independently with strong ownership while collaborating across teams. SKILLS & EXPERIENCE REQUIRED Strong Python skills (Python 3.11+ preferred) and solid object-oriented programming fundamentals. Hands-on experience with Django/FastAPI and TypeScript frameworks (Angular/NestJS). Excellent spoken English communication skills for day-to-day collaboration with teammates. Strong understanding of RESTful API design best practices. Familiarity with CI/CD and DevOps tooling (Jenkins, GitHub Actions, GitLab CI). Experience with GCP, Kubernetes, Terraform, and Helm. Experience with relational databases, preferably PostgreSQL. PUBLIC Strong analytical mindset, learning agility, and a problem-solving approach. Nice to have: Basic understanding of open-source software licenses (e.g., Apache-2.0, MIT, GPL) and their practical implications in software delivery. Familiarity with modern Python tooling (uv, Ruff, Rye) and Git workflows. Familiarity with Go and Java. Familiarity with identity protocols and standards: SAML, OAuth2, OpenID Connect. Proficiency with AI-assisted engineering tools such as Claude Code and Codex. Familiarity with OpenTelemetry and OpenAPI. Visible technical engagement (blogging, GitHub portfolio, open-source contributions).

🏢 Summary: Lead a full-stack development team in building, maintaining, and scaling applications in an agile environment. The role combines hands-on .NET/C# development with technical leadership, strategic project direction, and close collaboration with Business Analysts. 🗂️ Requirements: Proficiency in .NET, Proficiency in C#, Full-stack development experience, Front-end development experience, Document-based database knowledge, Event-based messaging framework knowledge, Cloud services experience, Containerization experience 📃 Skills: .NET, C#, Full-stack, Frontend, Databases, Messaging, Cloud, Containerization, Angular, MongoDB 🏢 Description: Summary: The role focuses on leading the development team to create new solutions and maintain systems within an agile environment, emphasizing the importance of robust applications and strategic direction. Main Responsibilities: Lead the development team in creating and maintaining applications. Adopt wider technology practices and address the speed of new application delivery. Engage in hands-on development while guiding the strategic direction of projects. Collaborate with teams to gather specifications and perform technical analysis. Navigate complex systems and ensure they are built to scale. Manage developer quality and capacity amidst organizational constraints. Key Requirements: Proficient in .NET and C#. Experience with full-stack development, including front-end technologies. Familiarity with document-based databases. Knowledge of event-based messaging frameworks. Experience with cloud services and containerization. Nice to Have: Prior experience in the banking or financial services sector. Familiarity with Angular or other modern front-end frameworks. Experience with MongoDB or similar environments. Other Details: Environment: .NET, C#, Angular, MongoDB, moving towards cloud solutions. Team Structure: Full Stack Developers working closely with Business Analysts.

🏢 Summary: Opportunity to maintain, support, and enhance existing web applications while delivering reliable, business-focused solutions. The role requires advanced SQL/database problem-solving and hands-on .NET, ASP.NET Web API, SQL Server, PostgreSQL, Kafka, Docker, GitHub Actions, AWS Lambda, AWS CDK, and Terraform experience. It offers Monday–Thursday hours, private medical care, sports card co-financing, consultant support, and a referral program. 🗂️ Requirements: Strong written and verbal English, Advanced SQL and database problem-solving expertise, Hands-on .NET Web experience, Hands-on ASP.NET Web API experience, Practical SQL Server experience, Practical PostgreSQL experience, Experience with Kafka, Experience with Docker, Experience with GitHub Actions, Experience with AWS Lambda, Experience with AWS CDK, Experience with Terraform, Understanding of design patterns, Strong analytical and problem-solving skills, Ability to work autonomously and proactively, Careful, secure handling of sensitive data, Risk-aware approach to operational stability 📃 Skills: SQL, DotNet, ASP.NET, WebAPI, SQLServer, PostgreSQL, Kafka, Docker, GitHub, AWS, Lambda, CDK, Terraform 🏢 Description: Responsibilities: Maintain, support, and enhance existing applications Deliver reliable solutions and improve existing functionality Ensure customer satisfaction through a customer-first approach Solve business and customer problems with a focus on business value Build and maintain effective relationships with client stakeholders Analyze issues and provide creative problem-solving solutions Respond quickly to changing priorities and urgent requests Work autonomously while ensuring operational stability Handle sensitive data responsibly and securely Minimize risk and reduce operational disruption Requirements: Strong English communication skills, both written and verbal Advanced expertise in SQL and database-related problem solving Hands-on experience with .NET (Web) and ASP.NET Web API Practical experience with SQL Server and PostgreSQL Experience working with Kafka, Docker, GitHub Actions, AWS Lambda, AWS CDK, and Terraform Understanding of Design Patterns Strong analytical and problem-solving skills Ability to work autonomously and take a proactive approach Proven ability to build effective relationships with stakeholders High attention to detail Demonstrated responsibility and trustworthiness when working with sensitive data Risk-aware mindset focused on stability and minimizing operational disruption Ability to work effectively in a fast-paced and dynamic environment Nice to have: C# development experience Offer: Working Hours: Monday-Thursday- 6 AM- 4 PM Private medical care Co-financing for the sports card Constant support of dedicated consultant Employee referral program

🏢 Summary: Full Stack Developer role focused on building scalable Java and React applications, including backend microservices, responsive frontend architecture, REST integrations, and AWS-based operations. The offer includes long-term international project work, flexible hours, modern tooling, and influence over architectural decisions. 🗂️ Requirements: 4–5 years of professional software development experience, Commercial Java experience, Commercial Spring Framework experience, Commercial Spring Boot experience, Commercial React.js experience, Commercial TypeScript experience, JavaScript ES6+ knowledge, Production AWS experience, Microservices architecture knowledge, SQL and relational database experience, REST API integration experience, HTML5, CSS3/SCSS, responsive design, and cross-browser compatibility knowledge, Jest and React Testing Library experience, Modern frontend tooling and build process familiarity, Agile environment experience 📃 Skills: Java, Spring, SpringBoot, React, TypeScript, JavaScript, AWS, SQL, HTML5, CSS3, SCSS, Jest, Kafka, Hadoop, Spark, Next.js, Redux, Zustand 🏢 Description: Your responsibilities: - Design, develop, and maintain scalable full stack applications using Java and React. - Build and maintain backend services with Java, Spring Framework, Spring Boot, SQL, and AWS. - Develop modern, reusable, and responsive user interfaces using React, TypeScript, and JavaScript. - Design and implement scalable frontend architecture and reusable UI components. - Collaborate closely with Product Owners, QA Engineers, and other development teams. - Integrate frontend applications with REST APIs and backend microservices. - Contribute to architectural decisions and technical discussions. - Ensure application performance, scalability, security, and maintainability. - Participate in code reviews, sprint planning, and Agile ceremonies. - Support deployment automation, production operations, and troubleshooting. - Mentor less experienced developers and promote engineering best practices. Our requirements: - Minimum 4–5 years of professional software development experience. - Commercial experience with Java, Spring Framework, and Spring Boot. - Commercial experience with React.js and TypeScript. - Solid understanding of JavaScript (ES6+). - Experience working with AWS in production environments. - Understanding of microservices architecture. - Hands-on experience with SQL and relational databases. - Experience integrating and consuming REST APIs. - Very good knowledge of HTML5, CSS3 / SCSS, responsive design, and cross-browser compatibility. - Experience with frontend testing using Jest and React Testing Library. - Familiarity with modern frontend tooling and build processes. - Ability to work independently, take ownership of delivered solutions, and contribute to system design. - Excellent communication skills and experience working in Agile environments. Nice to have: - Experience with Kafka or other event-driven architectures. - Knowledge of Hadoop or Apache Spark. - Experience with Next.js. - Experience with Redux, Zustand, or similar state management solutions. - Previous experience in Healthcare or Life Sciences projects. What we offer: - Long-term cooperation on an international project. - Flexible working hours. - Opportunity to influence architecture and technical decisions. - Modern technology stack. - Supportive, collaborative engineering culture. - Learning and development opportunities. - Modern equipment and comfortable working environment.

🏢 Summary: Full Stack Developer role focused on building scalable Java and React applications, including backend microservices, responsive interfaces, REST integrations, and AWS-based operations. The offer includes long-term international project work, flexible hours, influence on architecture, and development opportunities. 🗂️ Requirements: 4–5+ years of professional software development experience, Commercial Java experience, Spring Framework and Spring Boot experience, React.js and TypeScript experience, JavaScript ES6+ knowledge, Production AWS experience, Microservices architecture knowledge, SQL and relational database experience, REST API integration experience, HTML5, CSS3/SCSS, responsive design, and cross-browser compatibility knowledge, Jest and React Testing Library experience, Modern frontend tooling and build process familiarity 📃 Skills: Java, React, Spring, SpringBoot, SQL, AWS, TypeScript, JavaScript, HTML5, CSS3, SCSS, Jest, Microservices, REST, ReactTestingLibrary 🏢 Description: ✅ Your responsibilities: Design, develop, and maintain scalable full stack applications using Java and React. Build and maintain backend services with Java, Spring Framework, Spring Boot, SQL, and AWS. Develop modern, reusable, and responsive user interfaces using React, TypeScript, and JavaScript. Design and implement scalable frontend architecture and reusable UI components. Collaborate closely with Product Owners, QA Engineers, and other development teams. Integrate frontend applications with REST APIs and backend microservices. Contribute to architectural decisions and technical discussions. Ensure application performance, scalability, security, and maintainability. Participate in code reviews, sprint planning, and Agile ceremonies. Support deployment automation, production operations, and troubleshooting. Mentor less experienced developers and promote engineering best practices. 🧠 Our requirements: Minimum 4–5 years of professional software development experience. Commercial experience with Java, Spring Framework, and Spring Boot. Commercial experience with React.js and TypeScript. Solid understanding of JavaScript (ES6+). Experience working with AWS in production environments. Understanding of microservices architecture. Hands-on experience with SQL and relational databases. Experience integrating and consuming REST APIs. Very good knowledge of HTML5, CSS3 / SCSS, responsive design, and cross-browser compatibility. Experience with frontend testing using Jest and React Testing Library. Familiarity with modern frontend tooling and build processes. Ability to work independently, take ownership of delivered solutions, and contribute to system design. Excellent communication skills and experience working in Agile environments ⭐ Nice to have: Experience with Kafka or other event-driven architectures. Knowledge of Hadoop or Apache Spark. Experience with Next.js. Experience with Redux, Zustand, or similar state management solutions. Previous experience in Healthcare or Life Sciences projects. 🌟 What we offer: Long-term cooperation on an international project. Flexible working hours. Opportunity to influence architecture and technical decisions. Modern technology stack. Supportive, collaborative engineering culture. Learning and development opportunities. Modern equipment and comfortable working environment.