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Middle Backend Developer (Node.js)

21 hours, 5 minutes ago
Europe, Poland
Full-time
Mid Level
Backend Engineer
Software Development
Agile AWS Docker Express.js Fastify GitHub JavaScript JIRA Knex LLM NestJS Node.js Prisma React Scrum 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
51-200
Founded 2016
View All Jobs 10

Description

  • Write readable, testable, and maintainable JavaScript and TypeScript backend code.
  • Own backend features from requirements analysis through implementation, testing, and deployment.
  • Design and modify database structures and API contracts.
  • Document delivered code and technical decisions.
  • Review code, provide constructive feedback, and share knowledge with teammates.
  • Identify product and process improvements and propose pragmatic solutions.
  • Diagnose issues, communicate risks, and contribute to project discussions and technical decisions.
  • Consult with clients to understand needs and recommend practical solutions.
  • Support less-experienced developers through reviews, explanations, and pair programming.
  • Use AI tools responsibly, validating and adapting outputs to production standards.

Requirements

  • 2+ years of commercial Node.js experience.
  • Proficiency with at least one Node.js backend framework, such as Express.js, NestJS, or Fastify.
  • Strong TypeScript skills, including static typing, advanced types, and TypeScript compiler configuration.
  • Experience working with SQL databases, including basic schema design and ORM or query-builder tools such as Prisma or Knex.
  • Experience with NoSQL and/or in-memory databases is beneficial.
  • Practical understanding of AI/LLMs and experience contributing to AI-powered backend features, such as LLM API integrations, RAG flows, or agent-style workflows.
  • Experience using AI tools for prototyping, boilerplate, and testing while validating outputs for production use.
  • English at B2 level and Polish at C1 level.
  • Strong problem-solving and communication skills, including translating business requirements into technical estimates and solutions.
  • Experience with Agile/Scrum, AWS, Docker, or early-stage MVP product development is preferred.

Benefits

  • PLN 10,000–18,000 plus VAT on a B2B contract.
  • Paid days off.
  • Flexible full-time schedule in the Polish time zone, with remote, hybrid, or onsite work options.
  • Long-term contract with Scrum teams and Europe-based collaboration.
  • PLN 3,000 annual training budget.
  • Multisport membership, Luxmed healthcare, and Cafeteria Platform.
  • Tech talks and learning sessions.
  • Apple MacBook Pro and development tools including GitHub, Jira, Slack, and GSuite.

Interested in this position?

Apply directly on the company website

Apply Now

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