Senior FullStack Engineer
Posted Updated 12
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Description
Role Overview
FlexAI is looking for a Senior FullStack Engineer who can build end-to-end features across our PaaS platform — including
frontend UI layers, backend APIs, data models, and integrations with compute and infrastructure systems. You will work on developer modules Admin modules, Marketplace, and Licensing, shaping the user experience and backend logic.
What You’ll Do
- Build and ship end-to-end features across our platform (developer tools, marketplace, billing, admin)
- Develop high-performance UIs using React
- Design and implement APIs and backend services using Python (FastAPI) and/or Node.js
- Define clean, scalable contracts between frontend and backend
- Work on data-intensive workflows (jobs, compute orchestration, resource management)
- Collaborate with platform and infrastructure teams to build reliable systems
- Debug and optimize across the stack — from UI to backend performance
- Own features end-to-end: design, build, ship, and operate
What You’ll Need to Be Successful
- 5+ years of experience building Full Stack applications
- Strong hands-on development experience with React + Python (true React-Python fullstack capability).
- Experience with fastapi, pydantic, sqlmodel, and modern async backend development.
- Deep understanding of vite, bun, and frontend build/performance optimization.
- Ability to manage frontend async workflows using react-query and complex data tables using react-table.
- Strong API design skills and comfort working across schemas, data models, and serialization layers.
- Experience building modular services and UI-driven systems with high data throughput.
- Ability to operate independently in a high-speed environment and take full ownership of features.
- Strong communication and cross-functional collaboration skills.
Nice to Have
- Experience working with cloud APIs, compute runtimes, schedulers, or developer tooling.
- Knowledge of SRE concepts (Kubernetes, CI/CD, observability).
- Familiarity with licensing workflows or enterprise cloud marketplaces.
What We Offer
- A competitive salary and benefits package
- Work on cutting-edge AI infrastructure
- Build products used by developers and enterprises
- High ownership, fast execution, real impact
- Collaborative, high-caliber team
