Senior Frontend Product Engineer (React + TypeScript) - B2B

Location: Warsaw, Poland - Onsite (4 days/week) Contract: B2B 25-40 k PLN net / month + RSUs Why Fresha & Why Now? Fresha is re-imagining how the global beauty and wellness industry runs. 120k+ businesses, 450k+ professionals, millions of clients, and 1 billion+ appointments already rely on our platform for everything from bookings to payments. Join us at a moment of rapid scale - your work will surface on screens around the world within days, not quarters. What You’ll Do At Fresha, we believe AI is a force multiplier for feature delivery, not just a coding assistant. We provide every engineer with top-tier tooling (Claude, GitHub Copilot, Cursor) to strip away technical toil—so you can focus your energy on shipping high-impact product features. We value engineers who know how to leverage these tools to drive momentum within our 6-week cycles, accelerating the journey from concept to code while maintaining the deep technical judgment to verify, secure, and own the final user experience. Own and evolve our core booking & scheduling engine - the heartbeat of Fresha - ensuring it scales smoothly and delivers seamless experiences for millions. Design, build, and ship new user-facing features in React + TypeScript, reaching millions of professionals and clients. Own features end-to-end: discovery, technical design, implementation, testing, rollout, and observability. Tap into (and extend) our Design System to ship polished UI quickly while raising the bar for consistency. Write robust automated tests (Cypress, Jest, React Testing Library) and keep the CI/CD pipeline green. Partner closely with Product, Design, Backend, Infrastructure, and Mobile engineers to take features from discovery to rollout and beyond. Accelerate with AI: harness AI agents, LLM-powered coding tools, and access to a wide range of AI tools (e.g., chatbots, dev assistants). Curious about backend, DevOps, or mobile? Great - we’ll support you in exploring any part of the stack. What We’re Looking For AI-Augmented Workflow: You have deep experience building and interacting with AI agents, using them to amplify your output to 5x that of manual coding. You are able to integrate agents into our workflow while strictly adhering to our architecture and security standards, taking full accountability for ensuring all generated code meets the quality expectations of a Senior Engineer.Deep expertise in modern React & TypeScript, with a track record of shipping large-scale, consumer-facing web apps.Solid grasp of GraphQL (Apollo or urql) and REST fundamentals.Experience working with design systems.Fluency in web performance, cross-browser, and responsive design best practices.A testing mindset and familiarity with JS/TS testing frameworks. Don’t meet every single requirement? Passion and potential matter more than perfect check-boxes. If this role excites you, apply today and grow with us! Why You’ll Love It Here Direct impact & ownership - your decisions shape the product.Modern tech stack, continuous learning, and innovation.Competitive salary, equity, private healthcare, and more. Our Technology Stack - Frontend Technologies React - Modern JavaScript UI libraryTypeScript - Strongly typed JavaScriptReact Router DOM - Client-side routingReact Redux - State managementZustand - Lightweight state managementFormik - Form management Build Tools & Bundlers Rsbuild - Modern build tool (Rspack-based)esbuild - Fast JavaScript bundlerTurbo - High-performance build systemSWC - Rust-based JavaScript compiler UI & Design System Fresha Design System - Custom design systemSass/SCSS - CSS preprocessorPostCSS - CSS transformationLottie - Animations State Management & Data Fetching Redux with Redux ActionsURQL - GraphQL client Backend Communication GraphQL - API query languageGraphQL Code Generator - Type-safe GraphQLPhoenix - Real-time WebSocket channelsWebSocket & Server-Sent Events support Backend Technologies Node.jsTypeScriptElixirRuby on RailsPostgreSQLRedisDockerKubernetesNginxAWS Testing Framework Jest - Unit testingCypress - Component and integration testingTesting Library - React testing utilitiesMSW - API mocking Code Quality & Linting ESLint - JavaScript lintingTypeScript strict mode Development Tools Storybook - Component documentationHappo - Visual regression testing Mobile Development Capacitor - Native mobile app wrapperiOS & Android - Native mobile platforms CI/CD & DevOps GitHub Actions - Continuous integrationAWS - Cloud infrastructureDatadog - Monitoring and analytics Monitoring & Analytics Sentry - Error trackingAmplitude - User analyticsUnleash - Feature flags Date & Time date-fns - Date manipulationmoment - Date handling (legacy) Interview Process Screen call - Video call with a member from the Talent Team - 60 minutes1st stage - Technical Video call/In-person interview with our Engineers- Up to 90 minutesTech stage - Technical Video call/In-person interview with our Engineers - up to 2 hoursFinal stage - Video call/In person meet with our CTO - up to 60 minutes We aim to finalise the entire interview process and deliver feedback within 4 weeks. Every job application received is reviewed manually by our talent team. While we strive to assess applications within 7 days, the sheer volume of talented individuals expressing interest may occasionally extend this timeframe We may use artificial intelligence (AI) tools to support parts of the hiring process, such as reviewing applications, analyzing resumes, or assessing responses. These tools assist our recruitment team but do not replace human judgment. Final hiring decisions are ultimately made by humans. If you would like more information about how your data is processed, please contact us.