Middle Backend Developer (Node.js)

MasterBorn; United States; Remote; USD 120,000 - 160,000; Full time

Benefits offered by this job

Learning budget

Health insurance

Flexible hours

Remote or hybrid

Job summary

MasterBorn is seeking a skilled Backend Developer to join a team serving US clients. The tech stack includes React, Node.js and TypeScript; you will write readable, testable code, own features from requirements to deployment, and collaborate with cross-functional teams.

You should have 2+ years of Node.js experience, familiarity with at least one backend framework, strong TypeScript skills, and exposure to SQL/NoSQL.

Qualifications

• 2+ years of commercial experience in Node.js.
• Proficient with at least one backend framework (Express.js, NestJS, Fastify).
• Strong TypeScript skills with advanced typing and compiler configuration.
• Experience with SQL/NoSQL databases or in-memory data stores.

Responsibilities

• Write readable, testable and maintainable JS/TS code with an OOP flavor.
• Own backend features from requirements through deployment.
• Write documentation for delivered code and technical decisions.
• Perform code reviews and share knowledge with the team.
• Design and modify basic DB structures and API contracts.
• Propose pragmatic improvements and proactive solutions for the product.
• Share insights to diagnose issues and communicate risks.
• Participate in project refinements and technical decisions.
• Listen to client needs and propose practical solutions after team input.
• Mentor less experienced teammates through code reviews and pairing.

Skills

Node.js

TypeScript

Express.js

NestJS

Docker

GitHub Actions

SQL

NoSQL

English (B2)

Polish (C1)

Tools

GitHub

Slack

GSuite

Jira

Coda

FigJam

Claude Code

Job description

We are looking for a skillful Backend Developer to join one of our teams working with US clients - referrals from the high-end American IT market.

Our tech stack is built around React, Node.js and TypeScript. We are working with well-established companies and sometimes startups in their early stages (MVPs), which makes the job full of diversity and exciting challenges while crafting cutting-edge solutions.

Enjoy the flexibility of working within the Polish time zone and collaborate with clients from diverse industries such as FinTech, SportsTech, MedTech, and many others.

Salary: PLN 10.000 - 18.000 + VAT (B2B)

Offer:

• **Required skills:**2+ years of commercial experience in Node.js, SQL and NoSQL DBs, knowledge of JS frameworks (e.g Express.js, NestJS), experience in TypeScript, SOLID and KISS, knowledge about design and architecture patterns, knows how and why Docker and GitHub Actions works, basic usage of AWS services, English B2, Polish C1
• Offer: B2B/UZL, paid days off, 100% remote (or hybrid/onsite - as you prefer), Polish time zone, flexible hours, full-time position, long-term contract, Scrum Teams
• Perks and Benefits: learning budget, budget for health insurance and sports, regular feedback, support, and real learning opportunities, access to internal Design Talks and Tech Talks, and more
• **Tools you'll use:**Apple MacBook Pro, Slack, GSuite, GitHub, Jira, Coda, FigJam, Claude Code

Your future tasks and duties:

• Writing readable, testable and easy-to-maintain JS/TS code with OOP flavor
• Taking ownership of backend features from understanding requirements through implementation, testing and deployment
• Writing documentation for delivered code and technical decisions
• Code review of other developers in the team, including constructive feedback and knowledge sharing
• Direct involvement with the design and modification of basic DB structures and API contracts
• Propose pragmatic improvements and proactive ideas/solutions to enhance the product and team's work processes
• Share insights with the team to diagnose issues, communicate risks and focus on solutions
• Actively participate in project discussions, refinements and technical decision-making
• Listen to the client's needs and, after consulting the team, suggest practical solutions
• Support less experienced team members through code review, explanations and pair programming

Use AI tools responsibly in daily work, verifying and adapting results to production standards

About you - Tech skills & Experience:

• 2+ years of commercial experience in Node.js
• Good experience with at least one Node.js backend framework (e.g. Express.js, NestJS, Fastify, etc) - you know most of its basic APIs/features, worked on at least 1-2 projects involving such technologies
• Strong proficiency in TypeScript. You have practical experience with static typing, advanced types, and configuring TS compilers, treating it as your primary language to build robust and type-safe backend applications
• Potentially worked with NoSQL databases and/or in-memory databases and utilized them as a data store