Senior Backend Developer (.NET/Golang) – Global Customer Platform

<h3>Your tasks</h3> <p>At i3D.net, we provide world-class global coverage with one of the most interconnected networks in the world. Our solutions focus on low latency, zero packet loss, and unmatched scalability, enabling seamless experiences for millions of users worldwide. With dedicated support, bespoke solutions and cutting-edge technology, we deliver reliable, cost-efficient infrastructure that empowers game developers and businesses to scale effortlessly. Partnering with major names like Nvidia, DuckDuckGo, Discord, and Ubisoft, we are shaping the future of gaming and network technology. </p><h4>Why your role matters </h4><p>As a Senior Backend Developer in our Customer Success team, you’ll help design and build the platform that supports our next generation of customer-facing services. The focus is on modernizing a complex backend, replacing legacy systems with a clean, scalable foundation built in .NET and Golang. You’ll be the one connecting the dots—both technically and across the team—making sure everyone understands how the system works and where it’s headed. <br/> <br/><strong>???? The Vision </strong><br/>We’re creating a backend platform that powers customer onboarding, self-service, automation, and the configuration of services like dedicated servers, colocation, and networking. At the heart of it is a role- and permission-based service layer that bridges legacy infrastructure with a modern interface. <br/> <br/>The goal? A unified API surface that simplifies the customer experience and enables internal teams to gradually phase out legacy code—without disruption. This isn’t just about building endpoints; it’s about laying the groundwork for a platform that scales globally, supports automation, and drives the next chapter of our evolution.  </p><p><strong>Key Responsibilities </strong></p><ul><li><span><span>Build backend-for-frontend (BFF) services that enable customer self-service features.</span></span></li><li><span><span>Design and implement role- and permission-based access control (Auth0-based).</span></span></li><li><span><span>Migrate business logic from legacy PHP APIs into clean, scalable services in .NET and </span><span>Go</span><span>.</span></span></li><li><span><span>Develop APIs that unify legacy and modern systems, improving usability and maintainability.</span></span></li><li><span><span>Enable automation for infrastructure services like server leasing, colocation, and networking.</span></span></li><li><span><span>Collaborate closely with team members to explain and document a complex codebase.</span></span></li><li><span><span>Take ownership of your work—including deployment—while contributing to architectural decisions.</span></span></li><li><span><span>Help reduce key-person dependency by sharing knowledge and improving system transparency.</span></span></li></ul><h4>Tech stack</h4>At i3D.net, you’ll work with: <ul><li><strong>Languages</strong>: Golang, .NET, PHP (legacy).</li><li><strong>Infrastructure &amp; Tools</strong>: Docker, Kubernetes, Ansible, GitLab pipelines, OpenSearch</li><li><strong>Databases</strong>: MariaDB</li><li><strong>Practices</strong>: Test-Driven Development (TDD), CI/CD pipelines, Agile methodologies—we follow a "you build it, you deploy it, you support it" philosophy</li><li><strong>IDE</strong><strong>:</strong> Choose the development environment that you're most comfortable with</li></ul><h4>What success looks like in the first year</h4><ul><li><span><span>You’ve</span><span> delivered new, maintainable services that replace key legacy components.</span></span></li><li><span><span>You’ve</span><span> helped the team navigate and understand the backend landscape.</span></span></li><li><span><span>Our customer platform runs smoother, faster, and is easier to extend.</span></span></li><li><span><span>You’ve</span><span> contributed to knowledge sharing that reduced risk and increased team autonomy.</span></span></li><li><span><span>You’re</span><span> prepared to transition into broader backend roles in teams like Metal or API.</span></span></li></ul> <h3>Your profile</h3> <ul><li><span><span><strong>Experience</strong></span></span><span><span>: </span><span>You’ve</span><span> been building backend systems for 5+ years, </span><span>mainly with</span><span> .NET and </span><span>Go</span><span>lang</span><span>, and </span><span>you’re</span><span> comfortable diving into existing PHP code when needed.</span></span></li><li><span><span><strong>Tech Explorer</strong></span></span><span><span>: You enjoy working across different technologies and figuring out how complex systems fit together, and </span><span>you’re</span><span> not afraid to help shape the bigger picture.</span></span></li><li><span><span><strong>System Thinker</strong></span></span><span><span>: You know how to design APIs that connect old and new, and </span><span>you’re</span><span> good at untangling problems without needing a detailed roadmap.</span></span></li><li><span