Middle Backend Developer, Node.js

🕒 September 18

🇵🇱 Poland – Remote

💵 zł10k - zł16k / month

⏰ Full Time

🟢 Junior

🟡 Mid-level

🔙 Backend Engineer

🚫👨‍🎓 No degree required

👻 Ghost score 2%

What it means: how likely this posting is sitting open without active hiring.How to read it: 60% or higher means we think this is a ghost. Lower scores are less of a worry.How we score it: age, reposts, open roles vs team size, how fast jobs close, and whether pay is listed.Fine print: an estimate from public data, not a judgment of the company. Real jobs can score high, so treat it as a hint, not a fact.

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MasterBorn Software

WebsiteLinkedInAll Job Openings

51 - 200 employees

☁️ SaaS

🏢 Enterprise

Software Development • SaaS • Enterprise

MasterBorn Software is a company that specializes in software development, offering world-class experts who provide seamless solutions and ongoing support for businesses. They have a dedicated team of professionals in design, development, product management, and project management, ensuring high-quality and efficient product design. MasterBorn helps clients build their software with ready-to-go tech solutions and a proven technology stack, offering stable and scalable products with minimal risk. With over 60 projects delivered, they bring expertise in avoiding common pitfalls of complex software projects, supporting long-term success with thoughtful architecture. They also emphasize creating a community of clients and founders dedicated to mutual success.

📋 Description

• Write readable, testable, and maintainable JavaScript/TypeScript code with an OOP approach • Own backend features from requirements analysis through implementation, testing, and deployment • Write documentation for delivered code and technical decisions • Review other developers’ code and provide constructive feedback and knowledge sharing • Design and modify basic database structures and API contracts • Propose pragmatic improvements and proactive ideas for the product and team processes • Share insights to diagnose issues, communicate risks, and focus on solutions • Participate in project discussions, refinements, and technical decision-making • Understand client needs and suggest practical solutions after team consultation • Support less experienced team members through code review, explanations, and pair programming • Use AI tools responsibly, verifying and adapting results to production standards • Collaborate with US clients across FinTech, SportsTech, MedTech, and other industries

🎯 Requirements

• 2+ years of commercial experience in Node.js • Good 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 TypeScript compiler configuration • Experience with NoSQL and/or in-memory databases • Experience with SQL databases and ORM or query builder tools such as Prisma or Knex • Hands-on experience contributing to AI-powered backend features, such as LLM API integration, basic RAG flows, or simple agent-style workflows • Practical understanding of AI/LLM context, prompts, and limitations • English level B2 • Polish level C1 • Ability to work with different frameworks and understand MVP priorities • Strong problem-solving abilities • Knowledge of SOLID and KISS principles • Knowledge of design and architecture patterns • Knowledge of Docker and GitHub Actions • Basic usage of AWS services • Agile/Scrum experience, Docker, AWS, and early-stage product development experience are nice to have

🏖️ Benefits

• B2B/UZL • Paid days off • 100% remote, or hybrid/onsite according to preference • Flexible hours • Full-time position • Long-term contract • Polish time zone • Scrum Teams • Learning budget • Budget for health insurance and sports • Regular feedback, support, and real learning opportunities • Access to internal Design Talks and Tech Talks • Apple MacBook Pro • Slack, GSuite, GitHub, Jira, Coda, FigJam, Claude Code