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

Join a US-based construction tech project to evolve a cloud-based platform (AWS) used for high-precision cost estimation, digital measurements, and project management. This is a "heavy-logic" role where you will manage complex computational tasks—such as calculating dimensions and material costs—while rendering high-performance interactive graphics. You will balance stabilizing the existing codebase with the development of sophisticated new features for a growing platform.

Details

• Start Date: May 11, 2026 (ASAP).

• Duration: Until January 31, 2027

• Capacity: Full-time (FTE).

• Rate: up to 130 pln/h net B2B

• Location: 100% Remote (USA-based client).

• Work Ratio: Initially 60% Bugfixing / 40% New Features (shifting towards more new features over time).

Responsibilities

• Visual Engine Development: Building and maintaining interactive measurement tools using Canvas API or WebGL.

• Computational Logic: Implementing and optimizing complex business logic for real-time cost estimations, area measurements, and scale calculations.

• Fullstack Engineering: Developing scalable microservices in Node.js and high-performance frontends in React (TypeScript).

• Platform Stabilization: Identifying and resolving critical bugs within the specialized digital measurement toolset.

• Cloud Infrastructure: Working within an AWS cloud environment and managing containerized deployments via Docker.

Requirements

• Graphics Expertise: Proven commercial experience with Canvas API and/or WebGL.

• Business Logic: Strong background in building "computational" applications (handling dimensions, complex math, or financial estimation).

• Fullstack Stack: Senior-level proficiency in Node.js, React, and TypeScript.

• Architecture: Experience with Microservices and Docker.

• Language: Fluent English (C1) for direct collaboration with the US team.