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Middle Backend Developer (Node.js)

2 hours, 59 minutes ago
Poland
Full-time
Mid Level
Backend Engineer
Software Development
AWS Docker Express.js Fastify GitHub GitHub Actions JavaScript JIRA Knex LLM Microservices NestJS Node.js Prisma React Scrum Solid.js SQL TypeScript
Apply Now
MasterBorn Group

MasterBorn Group

MasterBorn Group: World-class experts building secure, cost-effective software for American startups with a focus on modern web apps.

Internet Software & Services
51-250
Founded 2016
View All Jobs 4

Description

  • Write readable, testable, and maintainable JavaScript/TypeScript backend code with an object-oriented approach.
  • Own backend features from requirements analysis through implementation, testing, and deployment.
  • Write documentation for delivered code and technical decisions.
  • Review teammates’ code and provide constructive feedback and knowledge sharing.
  • Design and modify basic database structures and API contracts.
  • Propose pragmatic improvements to the product and team workflows.
  • Participate in project discussions, refinements, and technical decision-making.
  • Collaborate with the client and team to translate business needs into practical solutions and estimates.
  • Support less experienced team members through code review, explanations, and pair programming.
  • Use AI tools responsibly in day-to-day development while verifying outputs to production standards.

Requirements

  • 2+ years of commercial experience in Node.js.
  • Strong experience with at least one Node.js backend framework such as Express.js, NestJS, or Fastify.
  • Strong proficiency in TypeScript, including static typing, advanced types, and compiler configuration.
  • Experience with SQL databases and integration or basic design work using ORM/query builder tools such as Prisma or Knex.
  • Exposure to NoSQL databases and/or in-memory databases as data stores.
  • Basic knowledge of Docker and GitHub Actions.
  • Basic experience with AWS services.
  • Understanding of design and architecture patterns, SOLID, and KISS principles.
  • English level B2 and Polish level C1.
  • Hands-on experience with AI/LLM-powered backend features such as LLM API integrations, basic RAG flows, or simple agent workflows (preferred).
  • Daily experience working in Agile/Scrum environments and monitoring code quality (preferred).
  • Experience working on products in the MVP or early product development stage (preferred).

Benefits

  • Salary of PLN 10,000–18,000 per month plus VAT on B2B.
  • B2B or UZL contract options.
  • 100% remote work, with hybrid or onsite available if preferred.
  • Flexible working hours within the Polish time zone.
  • Full-time, long-term contract.
  • Paid days off and paid time off.
  • Paid health break.
  • Budget for self-development.
  • Healthcare and sport activity benefits.
  • Mentoring program and individual career path.

Interested in this position?

Apply directly on the company website

Apply Now

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