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Sportradar is a NASDAQ-listed sports technology company serving thousands of partners globally with live sports data, odds, and content. You will join the SDK engineering team to build and extend the layer where Sportradar's data reaches partner products through embeddable widgets and SDKs used by hundreds of operators.
In this hands-on role, you will:
**SDK & Widget Development:** Extend the SDK within its existing architecture by building new modules, TypeScript definitions, and integrations. Develop embeddable widgets that render correctly inside any partner page, translating design mocks into responsive, themeable, and accessible UI components.
**API Integration:** Integrate internal services and partner APIs across REST, WebSocket, and SSE protocols, implementing the retries, reconnection logic, caching, and graceful degradation required for live sports data environments.
**AI-Augmented Engineering:** Ship daily with AI coding agents. You will develop context files, reusable skills, MCP server integrations, and maintain fast feedback loops (typecheck, lint, test) that enable agent autonomy. Your workflow experience with modern AI tools carries as much weight as traditional seniority.
**Developer Experience:** Maintain documentation, runnable examples, and error messages that integrating partners depend on. Your users are other developers, so clear communication and developer-first thinking are essential.
You will work alongside experienced Staff and Senior Engineers who provide mentorship and guidance. The team operates around modern tools and AI-assisted development practices.
**Requirements:**
- 3+ years of production JavaScript/TypeScript development (open across mid-to-senior range; depth in AI-assisted workflows counts as much as years)
- Strong proficiency in JavaScript and TypeScript with solid browser fundamentals: DOM, event loop, modern bundling (Vite, Rollup, esbuild), and module formats
- Daily experience with AI coding agents beyond simple prompting; ability to explain how you structure projects for agent effectiveness and where you maintain human control
- Proven ability to consume HTTP and real-time APIs, including browser-side auth, CORS, and graceful failure modes
- Sufficient CSS and layout skill to build moderately complex widgets from mocks independently
- Clear writing for developer audiences and instinct to communicate early
**Preferred Skills:**
- Background in sports betting, iGaming, trading, or other real-time, high-frequency data environments
- Testing depth across unit, integration, and browser automation (Vitest, Playwright), including visual regression
- Performance optimization experience in third-party contexts: bundle size, lazy loading, impact on host pages you don't own
- CI/CD and release automation experience
- Familiarity with AWS services and infrastructure
