# Senior Fullstack Engineer

**Company:** [FlexAI](https://hotfix.jobs/companies/flexai)
**Location:** Bengaluru, India
**Role:** Fullstack Engineering
**Experience:** 5+ years
**Skills:** React, Python, FastAPI, Node.js, Pydantic, Sqlmodel, Vite, Bun, React Query, React Table, Kubernetes, CI/CD, Cloud Apis, API Design, Async Programming
**Posted:** 2026-01-27

> Builds end-to-end features for an AI compute infrastructure platform, spanning React interfaces, Python or Node.js APIs, data models, integrations, and compute workflows. The role requires 5+ years of full-stack experience and strong ownership across frontend and backend systems.

## Job Description

## Responsibilities
- Build and ship end-to-end features across the platform, including developer tools, marketplace, billing, and admin modules.
- Develop high-performance user interfaces using **React**.
- Design and implement APIs and backend services using **Python**, **FastAPI**, and/or **Node.js**.
- Define clean, scalable contracts between frontend and backend systems.
- Work on data-intensive workflows involving jobs, compute orchestration, and resource management.
- Collaborate with platform and infrastructure teams to build reliable systems.
- Debug and optimize performance across the frontend and backend.
- Own features end-to-end: design, build, ship, and operate.

## Requirements
- 5+ years of experience building full-stack applications.
- Strong hands-on experience with **React** and **Python**.
- Experience with **FastAPI**, **Pydantic**, **SQLModel**, and modern asynchronous backend development.
- Understanding of **Vite**, **Bun**, and frontend build and performance optimization.
- Ability to manage frontend asynchronous workflows using **React Query**.
- Experience working with 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 work independently in a fast-paced 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, including **Kubernetes**, **CI/CD**, and observability.
- Familiarity with licensing workflows or enterprise cloud marketplaces.

## Compensation and Benefits
- Competitive salary and benefits package.
- Opportunity to work on AI infrastructure products used by developers and enterprises.
- High ownership, fast execution, and meaningful impact.
- Collaborative, high-caliber team.

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**Canonical:** https://hotfix.jobs/jobs/ea60bdd9-41fc-4cd4-a7c1-4fb81b8cf37c