Job Title : Senior Frontend Engineer - Chat SDK Lead.

Job Title : Frontend Developer.

Location : Jaipur.

Must Have skills : React 19 (Latest version), ShadCN, Tailwind CSS, Typescript, Tanstack Query.

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.

- Strong 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.