Senior Front-End Developer (React)

Quick Facts

• Role: Senior Front-End Developer (React) (Full-stack focus, ~90% front-end / 10% back-end)

• Team/Product: Mobile-first CMMS (QRmaint) used by hundreds of organizations

• Work model: Hybrid (3 days/week from Cracow or Warsaw office)

Description

You’ll work on a React + TypeScript frontend rewrite and deliver features end to end—from REST APIs and PostgreSQL to the UI. Collaboration, code reviews, and strong testing practices are central to how the team builds reliable, secure software, with AI-assisted development as part of the daily workflow. A smaller portion of the role includes backend work in .NET 10 and C# 14.

Responsibilities

• Build user interfaces in React and TypeScript

• Implement responsive, accessible, and performant screens using maintainable code

• Contribute to shared components and a design system

• Extend backend features in .NET 10 and C# 14

• Design and develop secure, consistent, well-documented REST APIs

• Support PostgreSQL database work and help optimize queries, indexes, and performance

• Deliver with unit, integration, and end-to-end testing as a standard practice

• Participate in code reviews and provide constructive feedback

• Use AI tools (e.g., Cursor, Claude Code, Copilot) to accelerate coding and refactoring, while validating correctness, security, and performance

• Work within GitHub and CI/CD; own features through production and support

• Participate in product discovery, technical breakdowns, estimation, and Agile ceremonies

Requirements

• 3+ years of commercial React development with strong TypeScript

• Proven experience integrating and designing REST APIs

• Working knowledge of PostgreSQL

• Experience with unit and integration tests as standard practice

• Comfort with code reviews and giving useful feedback

• Ownership of features from technical design to production and support

• Practical experience with AI-assisted development tools and critical evaluation of AI output

• English communication skills (B2+)

• Polish communication skills (B2+) due to internal team language

Benefits

• Hybrid work arrangement (3 days/week onsite in Cracow or Warsaw)

• AI-assisted development tools included in the daily workflow