Senior Fullstack Engineer Jobs

Lead the development of cloud-native automation tools for power systems as a Senior Fullstack Software Engineer, working across backend, frontend, and cloud infrastructure with hybrid remote options in the US and Canada.

F2, a YC-backed AI platform for private markets, is hiring a Senior Software Engineer to build scalable full-stack features with AI at the core and help shape the architecture and engineering culture.

Swiftly seeks a Senior Full-stack Software Engineer to design and deliver backend APIs and rich front-end experiences that help transit agencies analyze and improve service performance.

Senior FullStack Engineer needed to lead architecture, deliver scalable web features, and mentor engineers across Shippo’s remote-first App team.

Senior Software Engineer needed to build scalable backend and frontend systems for a fast-growing healthcare billing platform, with initial onsite onboarding in Santa Monica and flexible remote work thereafter.

Lead frontend architecture and build accessible, secure Veteran-facing digital forms and multi-party workflows for a mission-driven federal platform as a Senior Fullstack Engineer.

Experienced Senior Software Engineer needed to build cloud-native, TypeScript-based IoT applications using React and NestJS with serverless Azure deployments and strong automation/testing practices.

An experienced full-stack engineer needed to lead end-to-end feature development for GridUnity’s cloud-native platform, focusing on scalability, observability, and secure data stewardship in a remote-first environment.

Build and shape Kit’s publishing tools as a Senior Software Engineer II, driving frontend excellence (React/JS/CSS) and fullstack solutions for creators on a 100% remote team.

Experienced fullstack engineer (frontend-focused) needed to craft pixel-perfect React/TypeScript interfaces and end-to-end features for a well-funded fintech startup reimagining accounting.

Build scalable full‑stack solutions and AI/LLM integrations at StudyFetch, working in-person with the founding team to impact millions of learners.

Senior Fullstack Engineer needed to modernize and extend .NET and Java systems for Member Solutions, a remote-first subsidiary of Constellation Software.