Senior Software Engineer (m/f/d)
- Compensation
- Not disclosed
- Location
- Ljubljana, si
- Work setup
- Onsite
- Seniority
- Senior
- Employment
- Not specified
- Experience
- 3+ years
- Category
- Software engineering
- Posted
Skills
Nice to have
- Background in sports betting, iGaming, trading, or another real-time, high-frequency data environment.
- Testing depth across unit, integration, and browser automation (e.g., Vitest, Playwright), including visual regression for widget rendering.
- Experience with performance optimisations in a third-party context: bundle size, lazy loading, and impact on a host page you do not own.
- CI/CD experience and release automation.
- Familiarity with AWS services and infrastructure.
Full description
ABOUT US
Come work for one of the fastest-growing sports tech and iGaming companies in the world. Our NASDAQ-listed organization is aligned around shared passions for sports and technology, supporting thousands of partners with data and content worldwide.
We are seeking a full-stack SDK engineer to build the layer where our data reaches our partners' products. Our new SDK concept and embeddable widgets are how hundreds of operators put live sports data, odds, and content in front of millions of users. The ideal candidate is a strong engineer who writes for an audience of other developers and works fluently with AI coding agents.
This is a hands-on delivery role. You will ship within established foundations along with experienced Staff and Senior Engineers who will provide mentorship and guidance. We are building our engineering practice around modern tools and AI agents. Your workflow experience carries as much weight here as seniority.
THE CHALLENGE
- SDK Development: Extend the SDK within its existing architecture. New modules, integrations, TypeScript definitions, and ensure quality and test coverage.
- Widget Development: Build embeddable widgets ensuring they render correctly inside any partner page. Translate mocks into responsive, themeable, and accessible UI without requiring a front-end specialist for the last mile.
- API Integration: Integrate internal services and partner APIs into the SDK and widget layer across REST, WebSocket, and SSE, with the retries, reconnection, caching, and graceful degradation that live sports data demands.
- AI-Augmented Engineering: Ship daily with AI coding agents and embed that practice into our repositories. Develop context files, reusable skills and commands, MCP server integrations with various tools. Maintain fast feedback loops with typecheck, lint, and test commands that enable agent autonomy.
- Developer Experience: Maintain the documentation, runnable examples, and error messages that our integrating partners depend on. Your users are other developers.
ABOUT YOU
- Experience: 3+ years of production JavaScript/TypeScript development. We are open across the mid-to-senior range, and depth in AI-assisted workflows counts for as much as years on the CV.
- Tech Stack: Strong proficiency in JavaScript and TypeScript, with solid browser fundamentals — DOM, event loop, modern bundling (Vite, Rollup, esbuild), and module formats.
- AI Fluency: Daily experience with AI coding agents that goes beyond simple prompting. You can explain how you structure a project so agents work well within it, and where you do not trust them.
- API Integration: Proven ability to consume HTTP and real-time APIs, including browser-side auth, CORS, and failure modes that degrade gracefully.