[Hiring] Middle Frontend Developer @MasterBorn

Role Description

We’re looking for a Frontend Developer to build and improve applications for our US clients - from early-stage MVPs to established products in FinTech, SportsTech, MedTech, and other industries.

TypeScript, React, and Node.js are our bread and butter. We value strong application development fundamentals, engineering judgment, and the ability to learn the tools a project needs.

We’re building a team of engineers who can contribute across the application while developing deep expertise in frontend or backend engineering. In this role, frontend is your primary discipline, and you’ll broaden your contribution across the stack as your experience grows.

AI-assisted development is part of this role. You’ll use it to explore solutions, implement features, and improve your workflow, while taking responsibility for understanding, testing, and maintaining the code you ship.

Qualifications

• At least 2 years of commercial experience building and maintaining web applications
• Strong JavaScript and TypeScript fundamentals, with a practical understanding of HTML, CSS, and browser behavior
• Experience delivering application features involving user interactions, forms, and API integration
• Experience organising frontend code into maintainable components, managing application state, and investigating accessibility and performance issues
• Understanding of HTTP, client–server communication, authentication, and error handling
• Experience with a modern frontend framework and the ability to transfer your knowledge between tools and codebases
• Confidence testing and debugging applications, including investigating unfamiliar code and understanding why a solution works
• Ability to implement straightforward backend changes within an existing application, such as an API endpoint, input validation, or data access, with review and support for unfamiliar or complex areas
• Practical experience using AI coding assistants: breaking work into clear tasks, evaluating their suggestions, and checking correctness through code review and testing
• Familiarity with Git, build tooling, and container-based development environments
• Experience working with CI/CD workflows: running automated checks, investigating build and test failures, and deploying changes through an established pipeline

Requirements

• Care about user needs and the business value of what you build
• Able to independently deliver well-defined features, clarify ambiguity, and ask for support when needed
• Communicate progress, trade-offs, and blockers clearly to teammates and clients
• Approach problems proactively, investigate causes, and propose solutions
• Welcome constructive feedback and share what you learn
• Open to working across frontend and backend and learning technologies beyond your current toolkit
• English at B2 or above for collaboration with international clients
• Polish at C1 for daily team communication

Benefits

• 3,000 PLN annual training budget
• Multisport
• Luxmed
• Cafeteria Platform
• Tech-talks
• Learning sessions
• And more

Recruitment Process

• CV review
• Phone call with our Recruiter - 15 minutes
• Soft-skills interview with our Recruiter - 45 min
• Technical interview with our Specialists - 2 hours
• Decision and feedback 🥳