Senior Frontend Engineer – Chat SDK Lead

Job Title: Frontend Developer

Location: Jaipur

Experience: 5–10 Years

Role Summary

We are looking for a Senior Frontend Engineer – Chat SDK Lead to own a React-based component library powering AI chat interfaces across the organization. The role involves technical ownership of the SDK, release management, real-time streaming capabilities, testing, and direct collaboration with consumer engineering teams.

Mandatory Skills

- 5+ years of hands-on experience building and shipping React component libraries or SDKs consumed by multiple teams.
- Solid expertise in TypeScript, including generics, discriminated unions, strict mode, and declaration emit.
- Strong experience with React and modern frontend architecture.
- Hands-on experience with SSE/streaming protocols and real-time application development.
- Strong understanding of AbortController lifecycle and cancellation patterns.
- Experience with real-time state management using React Query, useReducer, Context, or equivalent approaches.
- Experience designing and maintaining public APIs/component libraries with a focus on backward compatibility and extensibility.
- Hands-on experience with release management, including Semantic Versioning (semver), changelogs, breaking-change management, and monorepo tooling.
- Experience with Turborepo, Changesets, or equivalent monorepo/release management tools.
- Ability to lead technical discussions with product/engineering teams, negotiate API contracts and technical trade-offs,



and prepare migration documentation.
- Strong experience with automated testing for complex frontend/public API surfaces.

Preferred Skills
- Experience building AI/LLM chat interfaces, including streaming completions and tool-call rendering.
- Experience with React 19, including Server Component boundaries and "use client" patterns.
- Experience with multi-model/provider integrations or AI gateway abstractions.
- Experience with Storybook, Biome and tsdown.
- Experience with TanStack React Query.
- Exposure to OpenAI SSE and AG-UI/custom streaming events.
- Experience with local-first storage and client-side data eviction strategies.
- Experience with Portkey AI Gateway or similar multi-provider abstraction layers.

Tech Stack TypeScript 5.7 | React 19 | tsdown | Turborepo | Biome | Storybook 10 | TanStack React Query | SSE | Changesets | Private npm Registry

Key Responsibilities

- Own the technical direction and architecture of the Chat SDK.
- Design and maintain streaming interfaces and real-time state management.
- Handle complex streaming scenarios including tool-call correlation and provider-specific events.
- Own SDK release lifecycle, versioning and breaking-change coordination.
- Establish and maintain comprehensive automated test coverage.
- Work directly with consumer teams on integration, troubleshooting, API contracts and extensibility.
- Create migration guides and technical documentation for SDK consumers.

📌 Senior Frontend Developer– Chat SDK Lead (Jaipur)
🏢 Celebal Technologies
📍 Jaipur