GD
Senior Cyber Security Engineer
Greencastle Digital
Belgrade, RS
Belgrade, RS (Hybrid)1 open job
Belgrade-based technology hub building sports betting, casino, and online gaming platforms for challenger brands, with cybersecurity as a core technical domain.
Greencastle Digital is a Belgrade-based technology hub that builds scalable platforms and customer-first experiences for challenger betting and gaming brands, among them BoyleSports, S Gaming, and Timberazo. In an industry where player accounts, real-money wagers, and transaction flows are the asset, the company lists cybersecurity as a core technical domain alongside platform engineering and product design - stated alongside explicit commitments to player safety, security, and reliable delivery, rather than parked in a separate function.
The engineering surface is concrete. The team is decomposing an Oracle monolith into event-driven microservices as part of a legacy modernization effort, migrating to AWS, and building out casino and online gaming platforms plus a new sportsbook front end currently under development. Adjacent work spans front-end development, product design, customer experience, and marketing technology - the full stack of a modern betting operation, not just a services layer.
Operating model: small, close-knit teams where individual contribution, curiosity, and ownership of problems are expected. The stated culture pairs start-up energy with the rigor of an established betting and gaming operator, prioritizes quality over speed, respects work-life balance, and welcomes new perspectives and calculated risks. The stated values are Personal, Dynamic, Fearless, and Excellence, with close collaboration across colleagues and partners.