Senior Node.js Developer

New

TQLO SP. Z O.O.Insurance technology

Locations: Warszawa, Skierniewicka 10A, Warszawa, Country code: PL; Tryb Współpracy: 100% zdalnieContractSenior

Salary150 - 200 PLN per hour net b2b

Apply NowOpens the employer's application page

Job Details

Languages: Polish C1, English C1; English C1 is specified as a requirement.
Experience: Minimum 5 years of commercial experience
Required Skills: Node.jsPostgreSQLJavascriptMicrosoft SQL ServerMySQLTypeScriptRESTful APIsMicroservicesUnit Testing

Have at least 5 years of commercial experience developing backend applications with Node.js, JavaScript, and TypeScript.
Know the Node.js ecosystem and have experience designing and developing scalable backend services.
Have practical experience designing and implementing REST APIs and integrations with external systems.
Know relational databases such as PostgreSQL, MySQL, or MS SQL.
Have experience with microservice architecture and knowledge of architectural and design patterns.
Be able to make technical decisions independently and assess their effects on architecture, performance, and system maintenance.
Know the Test Pyramid approach and have practical experience with unit, integration, and E2E testing.
Know application security, service-to-service communication, and data protection.
Have practical experience with container environments and understand application deployment processes.
Have experience analyzing production issues, debugging, and optimizing application performance.
Have practical experience with AI-assisted development tools such as Cursor, Claude Code, or Codex.
Know programming best practices, Clean Code principles, and code review processes.
Have strong English proficiency at C1 level.
Nice to have: NestJS, Docker, Kubernetes, AWS, CI/CD, DevOps, backend performance profiling, real-time data-processing systems, insurance or financial products, or technical mentoring experience.

Design, develop, and optimize backend services supporting product functionality.
Build and evolve scalable microservice architecture.
Design and implement integrations with internal and external APIs and third-party services.
Develop data-processing mechanisms for business processes requiring real-time decisions.
Design and optimize data structures and relational database queries.
Deploy and maintain applications in container environments and support deployment automation.
Analyze and resolve production issues across code, data, and service communication.
Create and develop automated tests to support application quality, stability, and security.
Use AI-assisted development tools and contribute to architecture decisions and technical standards.
Conduct code reviews and collaborate with product managers, architects, and engineering teams.

View Full Description & ApplyYou'll be redirected to the employer's site