Senior Node.js/TypeScript Developer

Czym będziesz się zajmować? YOU WILL Design, develop, and maintain backend applications and REST APIs using Node.js, Express, JavaScript, and TypeScript. Build and maintain middleware layers and service integrations. Write clean, maintainable, and well-tested code following modern software development practices. Develop and maintain unit and integration tests using Jest, Vitest, or similar frameworks, applying TDD principles. Analyze and troubleshoot runtime errors, performance issues, and application regressions. Work with asynchronous processing, batch operations, and database transactions. Identify and resolve security vulnerabilities in application code and dependencies. Configure, maintain, and troubleshoot CI/CD pipelines using Azure DevOps or GitHub Actions. Design and implement observability, monitoring, and corrective tools for operations and support teams. Leverage AI-assisted and agentic coding tools, including Claude Code, GitHub Copilot, and MCP. Collaborate with international development and operations teams. Kogo poszukujemy? MUST HAVE Strong commercial experience with JavaScript (ES6+) and TypeScript. Solid knowledge of TypeScript fundamentals, including interfaces, generics, type inference, and type safety. Experience with TypeScript configuration (tsconfig.json) and integration with build tools. Hands-on experience developing backend applications and REST APIs using Node.js and Express. Good understanding of the Node.js event loop, asynchronous execution, batch processing, and database transactions. Experience with unit and integration testing using Jest, Vitest, or similar frameworks, including TDD practices. Strong debugging and troubleshooting skills, including performance analysis and regression investigation. Experience managing dependencies within the NPM ecosystem, including package versioning and security vulnerability remediation Practical experience with Azure DevOps or GitHub Actions and CI/CD pipelines Experience with AI-assisted development and agentic coding, including Claude Code or GitHub Copilot, MCP, skill design, and context engineering Experience designing observability and corrective tooling for production systems Strong understanding of software engineering best practices and maintainable code design Fluent in English and experience working in international, distributed teams Czego wymagamy? 5 lat doświadczenia na podobnym stanowisku Znajomości: JavaScript TypeScript Node.js Express.js NPM Azure DevOps CI/CD AI Języki: Polski Angielski Jakie warunki i benefity otrzymasz? 26k–31.8k PLN netto/m (B2B) 18.6k–22.8k PLN brutto/m (Umowa o pracę) B2B - Elastyczne godziny pracy (100%) Praca zdalna: W całości Szkolenia wewnętrzne Pakiet medyczny, Ubezpieczenie, Pakiet sportowy Kawa / Herbata Parking rowerowy Kim jesteśmy? Od 20 lat wspieramy liderów IT, dostarczając technologie, ekspertów i pełne wsparcie operacyjne - w tym legalizację pobytu i pracy międzynarodowych specjalistów IT Do naszych projektów poszukujemy specjalistów Java, JavaScript, C embedded, C++, PHP, specjalistów od mobile, testerów oprogramowania, administratorów sieci i systemów i wielu innych.