Senior .NET Backend Developer

At Funstage, our players come first. The Backend team creates the technology behind our social casino games, from bonus engines and progression systems to leaderboards, battle passes and real-time gameplay that keep players coming back for another round. As a Senior .NET Backend Developer, this is a chance to turn great game ideas into reality, tackle exciting challenges at scale, and see your work make a real difference to the player experience. From idea to production, there’s plenty of room to shape how things are built, bring fresh ideas to the table, and have fun solving tricky technical problems along the way. Your tasks Analyse Turn technical discussions and stakeholder feedback, including insights from Customer Support and CRM, into clear, actionable requirements and practical solutionsExplore, evaluate, and manage libraries and tools that help the team choose the right solution for each project Develop Design and build optimised distributed backend systems and real-time gaming features capable of handling hundreds of thousands of operations per second and up to 50.000 simultaneous playersCreate and optimise databases and ETL pipelines to keep data reliable and systems performing at their bestBring new features to life in our Vue.js Admin Panel by implementing their configuration Test Create and maintain automated and performance tests that keep features reliable under pressureDevelop and maintain Vue.js Test-Client features that make backend features easy to test and validate Deploy Build and maintain CI/CD pipelines and fast, reliable rollback strategiesWork with web and mobile frontend teams to integrate backend services seamlessly across their platforms Maintain Build and continuously improve Kubernetes infrastructure and monitoring across Azure and local development environmentsMaintain security protocols covering user roles, access controls, encryption, and security updatesDocument incidents from root cause through resolution and post-mortem analysis, turning issues into opportunities to improveShare your expertise with your colleagues and improve the overall team quality Tools Technologies: .NET 10, Vue.js, GraphQL via Hasura, WebSockets via SignalR, PostgreSQL, Cassandra, Redis, OpenTelemetry, and Identity Server The Team Architecture is a team effort. New solutions are discussed openly and shaped together, with team buy-in before development beginsCode reviews are part of how we grow. Every pull request is reviewed by the rest of the team within a few hours, helping us maintain quality while sharing knowledge along the wayWe work as peers. The manager is part of the team, and technical decisions are discussed openly and made togetherChoose what you build. Features aren’t simply assigned, team members can choose which features they want to work on from the sprintQuality comes built in. Unit tests and Gherkin-based acceptance tests are part of our definition of done and are kept up to dateKeep it simple. We follow the YAGNI principle, avoiding unnecessary complexity and focusing on solid, evolvable architecturesOwn the full picture. Everyone builds a strong understanding of our Kubernetes components and CI/CD, so infrastructure knowledge is shared across the team Your profile Professional experience working with .NET technologies, with .NET 5+ experience preferredStrong knowledge of database technologies, with experience across SQL and NoSQL preferredFamiliarity with the API technologies that connect our backend to frontend experiences, including REST, GraphQL, and WebSocketsFamiliarity with Docker, Kubernetes, and cloud-native technologiesUnderstanding of distributed systems and the challenges of building technology capable of supporting millions of players worldwideCapable of building event-driven systems using message buses like Kafka, RabbitMQ, and Azure Service BusStrong product thinking, with the ability to turn stakeholder needs into clear and effective technical requirementsCollaborative mindset with experience in pair programming, team workshops, knowledge sharing, and supporting the growth of othersAgile mindset and a pragmatic approach to building solid, evolvable solutionsConfident communicating and collaborating in English, both written and spoken Our offer We believe great work happens when people feel supported, inspired, and balanced. By investing in our employees, we create an environment where everyone can thrive and reach their full potential. This commitment has been recognized through our Great Place to Work® certification. We offer the following benefits: Flexible working hours and a hybrid model that fit your lifestyle, backed by a strong culture of work-life balanceA dedicated training budget to explore new skills, deepen your expertise, and shape your career journeyA welcoming office atmosphere at our Vienna HQ with daily fresh fruit, a wide range of teas, fair-trade coffee, and meals at our company-subsidized restaurantSubsidized public transportation, plus access to pool e-bikes and e-cars — for both business and personal usePlenty of ways to stay active and connected, from MyClubs app points to regular sports and company eventsAttractive local employee discounts and healthcare benefits that make everyday life a little easierThe minimum gross annual salary for this position according to the applicable collective agreement is €58,000 (full-time basis). A higher salary is possible depending on qualifications and experience About Greentube Greentube GmbH, the global interactive unit of NOVOMATIC, is a leading developer and supplier of iGaming solutions. Greentube is a wholly-owned subsidiary of the NOVOMATIC Group, one of the biggest producers and operators of gaming technologies and one of the largest integrated gaming companies in the world. Greentube’s industry leading omni-channel technology allows the convergence of online, mobile and land-based games. The well-diversified product portfolio includes Classic Slots, Table Games, Live Dealer Gaming, AWP Reloaded Slots, Server-Based Gaming, Social Casino Gaming, Bingo and more. Greentube GmbH Wiedner Hauptstraße 94, 1050 Wien www.greentube.com