Senior Fullstack Developer (React / Node.js / Canvas API / WebGL)

Nasze wymagania: 5+ years of commercial experience, with a senior-level command of the full stack Strong ability to read and reason about complex business and computational logic directly from well-established codebases Proficiency in React and TypeScript Hands-on experience with Canvas API or WebGL, with a proven ability to render thousands of vectors while maintaining high performance. Proficiency in Three.js, Babylon.js, PixiJS, or GIS tools like Mapbox and Deck.gl is equally valued. Solid Node.js experience and familiarity with microservices architecture - you know how services talk to each other and how to navigate a distributed system Comfort working in a cloud environment (AWS: S3, Lambda, RDS) and with containerized workflows (Docker, Docker Compose) - deep expertise not required, but confident daily usage expected A strong commitment to calculation correctness, backed by testing and thorough code review A pragmatic approach to evolving established architectures - knowing when to refactor and when to build on what works English at a B2+/C1 level for daily collaboration with a US-based team and the confidence to proactively ask questions AI Tools: Experience with GitHub Copilot or other LLM technologies, while maintaining a critical eye during code reviews O projekcie: About Role We are looking for a high-caliber Node.js Expert to join our core engineering team on a long-term basis. We are not hiring for a single contract, but for a long-term cooperation where - after the initial 8-month engagement—you will continue to grow as a technical lead within our internal company projects. Project A minimum 8 month deep-dive engagement on a mission-critical platform used in multi-million dollar construction projects across the US market - giving you rare, hands-on exposure to high-precision spatial computing and automated cost estimation systems, a niche at the intersection of ConTech, PropTech and FinTech. You will join a dedicated team supporting one of our key long-standing US clients, directly impacting the financial accuracy of large-scale construction projects. As the Senior Fullstack Engineer, you will represent our company within the client's technical organization and collaborate daily with an experienced domain team. Zakres obowiązków: Building and optimizing precision algorithms for spatial measurements (surfaces, dimensions) and automated cost estimation Developing and maintaining the UI using Canvas API (and elements of WebGL) for 2D/3D visualizations of construction models Delivering features across the entire stack, from Node.js microservices and database schemas to React on the frontend Optimizing rendering and data processing to ensure a smooth user experience when handling large-scale architectural datasets Evolving and improving a mature, production-proven codebase to enhance system maintainability and scalability Ensuring high calculation correctness through testing and participating in a thorough Code Review process Collaborating with long-tenured domain experts to navigate cross-team dependencies and align on technical decisions Oferujemy: Real impact - you will join stable, developed analytical, fintech, or construction projects. Fully Remote Long-term cooperation 30-minute lunch break included in the 8-hour working day Cross-functional collaboration