Senior Backend .NET Software Engineer

About this role

<h2><strong>The Role</strong></h2> <p>Our Development team in Malaga is growing and we are now looking for a Senior Backend Software Engineer to join! Our Campaigns &amp; Rewards unit at Betsson Group ensures our customers come back for more. It’s all about loyalty. We provide a world class customer experience beyond the game play featuring Tournaments, Dynamic personalized campaigns and much more!&nbsp;</p> <p>You will be part of preparing our journey to containerization, increasing the scalability of our systems while also maintaining their high quality. To accommodate new requirements, we are constantly re-evaluating our systems design and working on exciting new features.</p> <h2><strong>What you'll do:&nbsp;</strong></h2> <ul> <li>Design and develop distributed backend services&nbsp;using .NET and event-driven architecture.</li> <li>Collaborate with product and commercial teams&nbsp;to turn engagement ideas into scalable, maintainable, and user-friendly solutions.</li> <li>Optimize our microservice ecosystem&nbsp;for performance, reliability, and observability.</li> <li>Drive our containerization and cloud migration strategy forward.</li> <li>Participate in architecture discussions&nbsp;and help shape technical decisions. <ul> <li><em>For senior engineers</em>: Lead architectural decisions and proactively identify areas for improvement.</li> </ul> </li> <li>Write maintainable, well-tested code&nbsp;and conduct code reviews.</li> <li>Participate in incident resolution and the team’s on-call rotation.</li> <li>Maintain clear technical documentation&nbsp;such as ADRs, runbooks, and guidelines.</li> <li>Build and share your domain expertise&nbsp;within the team.</li> </ul> <h2><strong>What Tech Stack you'll be working with:</strong></h2> <p>We don’t expect you to know everything listed below – but the more you’re familiar with, the better. What matters most is your ability to learn, collaborate, and write high-quality, maintainable code.&nbsp;</p> <h3>Core Technologies</h3> <p>These are essential to the role, and we’re looking for solid experience here – especially for senior candidates.</p> <ul> <li><strong>Languages &amp; Frameworks</strong>: C#, .NET (modern versions after .NET Core)</li> <li><strong>Databases</strong>: SQL Server, PostgreSQL, Redis, Couchbase&nbsp;<em>(experience with relational or document databases, including indexing and query optimization, is a strong plus)</em></li> <li><strong>Cloud &amp; Containers</strong>: AWS, Kubernetes, Docker&nbsp;<em>(experience with any major cloud provider or containerization platform is valuable)</em></li> <li><strong>Testing &amp; Quality</strong>: xUnit/NUnit, mocking frameworks, k6 for load testing&nbsp;<em>(understanding of unit, integration, and performance testing is more important than specific tools)</em></li> </ul> <h3>Additional Tools &amp; Practices</h3> <p>Familiarity with these of similar tools and concepts is a plus.</p> <ul> <li><strong>Messaging &amp; Microservices</strong>: Web APIs, Apache Kafka, RabbitMQ, Orleans&nbsp;<em>(experience with any messaging or actor-based system is valuable)</em></li> <li><strong>Observability</strong>: Prometheus, Grafana, Loki, Splunk&nbsp;<em>(or experience with other observability stacks)</em></li> <li><strong>CI/CD</strong>: GitHub Actions, trunk-based development, progressive delivery&nbsp;<em>(familiarity with continuous delivery pipelines and deployment strategies is more important than specific tooling)</em></li> <li><strong>Architecture</strong>: Domain-driven design, event sourcing, actor model, distributed systems at planet-scale</li> <li><strong>Ways of Working</strong>: Agile and Lean principles, DevOps mindset, strong collaboration</li> </ul> <p>&nbsp;</p> <h2><strong>What we offer</strong></h2> <ul> <li data-leveltext="" data-font="Symbol" data-listid="2" data-list-defn-props="{"335552541":1,"335559685":720,"335559991":360,"469769226":"Symbol","469769242":[8226],"469777803":"left","469777804":"","469777815":"hybridMultilevel"}" data-aria-posinset="1" data-aria-level="1"><span data-contrast="auto">25 working days of paid vacation.</span><span data-ccp-props="{"335559738":240,"335559739":240}">&nbsp;</span></li> </ul> <ul> <li data-leveltext="" data-font="Symbol" data-listid="2" data-list-defn-props="{"335552541":1,"335559685":720,"335559991":360,"469769226":"Symbol","469769242":[8226],"469777803":"left","469777804":"","469777815":"hybridMultilevel"}" data-aria-posinset="2" data-aria-level="1"><span data-contrast="auto">Private health and life insurance.</span><span data-ccp-props="{"335559738":240,"335559739":240}">&nbsp;</span></li> </ul> <ul> <li data-leveltext="" data-font="Symbol" data-listid="2" data-list-defn-props="{"335552541":1,"335559685":720,"335559991":360,"469769226":"Symbol","469769242":[8226],"469777803":"left","469777804":"","469777815":"hybridMultilevel"}" data-aria-posinset="3" data-aria-level="1"><span data-contrast="auto">Flexible compensation package&nbsp; for transport, meals, and more!</span><span data-ccp-props="{"335559738":240,"335559739":240}">&nbsp;</span></li> </ul> <ul> <li data-leveltext="" data-font="Symbol" data-listid="2" data-list-defn-props="{"335552541":1,"335559685":720,"335559991":360,"469769226":"Symbol","469769242":[8226],"469777803":"left","469777804":"","469777815":"hybridMultilevel"}" data-aria-posinset="4" data-aria-level="1"><span data-contrast="auto">Hybrid work policy for the best of office and home.</span><span data-ccp-props="{"335559738":240,"335559739":240}">&nbsp;</span></li> </ul> <ul> <li data-leveltext="" data-font="Symbol" data-listid="2" data-list-defn-props="{"335552541":1,"335559685":720,"335559991":360,"469769226":"Symbol","469769242":[8226],"469777803":"left","469777804":"","469777815":"hybridMultilevel"}" data-aria-posinset="5" data-aria-level="1"><span data-contrast="auto">Up to 10 days per year working remotely from abroad.</span><span data-ccp-props="{"335559738":240,"335559739":240}">&nbsp;</spa