Senior Fullstack Engineer

JavaScript

Senior Fullstack Engineer

JavaScript
Centrum, Stockholm Metropolitan Area

emagine Polska

Full-time
Any
Senior
Hybrid

Job description

Role Description

  • Strong full-stack engineering experience with deep expertise in Node.js and React, capable of building and maintaining modern web applications end to end.

  • Proficient in TypeScript with hands-on experience designing scalable, maintainable, and strongly typed codebases.

  • Solid experience designing and developing Backend-for-Frontend (BFF) architecture, creating APIs and orchestration layers tailored for web and mobile clients will be a huge advantage.

  • Strong understanding of system design principles including caching strategies, scalability, reliability, performance optimization, and observability.

  • Proven experience building and operating large-scale, high-traffic applications in production environments.

  • Hands-on experience with modern Node.js frameworks; prior experience with Fastify is a strong advantage.

  • Strong expertise in unit testing and automated quality assurance using frameworks such as Vitest or Jest, with a focus on maintainable test coverage.

  • Strong knowledge of software engineering best practices including clean code, testing, code reviews, CI/CD, security, and maintainability.

  • Excellent communication and stakeholder collaboration skills, with the ability to work effectively across engineering, product, and business teams.

  • Detail-oriented team player with practical experience working in Agile environments, including sprint planning, estimation, iterative delivery, and continuous improvement.

Period from: 2026-05-08
Period to: 2026-12-31

Tech stack

    English

    B1

    Security

    advanced

    Backend

    advanced

    CI/CD

    advanced

    Unit Testing

    advanced

    Testing

    advanced

    System Design

    advanced

    Quality Assurance (QA)

    advanced

    frontend

    advanced

    Agile

    advanced

    Performance optimization

    advanced

Office location