Senior Software Engineer (Frontend)

Salary: 24,000 - 28,000 PLN/month

Hybrid, Warsaw (2 Days/Week)

Full-time

Employment contract (UOP) via Employer of Record

We're looking for a Senior Frontend Engineer for a software company whose platform lets professionals design real-world physical systems in an interactive, browser-based 3D environment. You'd join the team that owns the core of the product: the design surface where users model actual sites in a 3D canvas, backed by CAD tooling and a data model that keeps designs accurate to the physical world. Working stack: TypeScript, JavaScript, React, GraphQL, three.js, PostgreSQL, Ruby on Rails, and Python.

A senior individual contributor role reporting into engineering leadership. You'll own features end-to-end, from technical design through to production support, and help steer the frontend architecture the team relies on.

Requirements:

• 5+ years building production user interfaces in JavaScript and TypeScript

• React experience and a firm grasp of component-based frontend architecture

• Experience wiring frontends to backend services and APIs

• Comfort owning features end-to-end, from scoping through to production

• Willingness to step beyond the frontend when a feature calls for it, including reading and touching backend code (Ruby on Rails familiarity is a plus)

• Engineering fundamentals: system design, testing, refactoring, and clear technical writing

• A CS degree or an equivalent hands-on track record shipping production software

• Fluent in written and spoken English

Nice to Have:

• GraphQL in production

• three.js or another 3D graphics library

• Ruby on Rails or Python

• Playwright or a comparable end-to-end testing framework

• Git in a collaborative, multi-engineer codebase

• Any exposure to CAD software

• Experience with distributed teams in a hybrid setup

Key Responsibilities:

• Build and ship frontend experiences that make designing faster and more accurate

• Partner with Product, Design, and Engineering to scope, build, and release features

• Write clean, well-tested code and raise the bar through code reviews and technical discussions

• Strengthen reliability with automated tests and a share of the team's on-call rotation

• Contribute to shared frontend architecture, tooling, and technical standards

• Pick up backend work when it's needed to land the features you own

• Support a collaborative engineering culture through mentoring, planning, and cross-team work