Senior Full-Stack JavaScript Developer – Sports Betting (Fullstack-Entwickler/in)

We are partnering with a fast-growing international technology company within the sports betting and iGaming industry to recruit a Senior Full-Stack JavaScript Developer for their team in Sofia, Bulgaria.This is an opportunity to work on high-performance, real-time betting products used in a fast-paced environment where scalability, reliability, and user experience are critical. You will take ownership across the full development lifecycle, working with modern JavaScript technologies to build and continuously improve complex sports betting platforms.Your Role- Design, develop, and maintain scalable full-stack JavaScript applications- Build responsive and high-performance user interfaces using modern frontend technologies- Develop robust backend services, APIs, and integrations supporting real-time sports betting products- Work with high-volume, real-time data and ensure applications remain reliable during peak sporting events- Design and integrate RESTful APIs, WebSockets, and third-pa…