Senior Software Engineer (C#/Backend)

bunny.net is where individual imaginations gather together to solve next-generation internet challenges. Join a team of experts and, together, help shape the future of the internet. Here, you'll do more than join something — you'll add something.

We're not just saying that, but our culture really hops. We have established values that enable our fluffle to grow stronger with each new team member who joins us: Relentless Innovation. Integrity. Impact. Kindness. Diversity. Transparency & open communication. We also believe "good" is not good enough, and we continue striving to keep pushing things to the next level by learning and improving every single day. Oh, and did we mention that all our positions are 100% remote with a flexible working schedule? There's no need to relocate if you would like to join us, and you can carve out your own work schedule as well!

Senior Software Engineer - (C#/Backend)

We are looking for a talented and driven Senior Software Engineer - Backend to join our team. In this role, you’ll work on developing and scaling core systems that power critical functionalities like Authentication and Billing. You will also take ownership of long-term strategic goals, such as improving abuse prevention, scaling and optimizing billing systems, extracting billing into a standalone service, and making APIs more resilient to failures. This position offers the opportunity to make a lasting impact by solving complex challenges and contributing to the robustness and scalability of our platform.

What will you do?

• Design, develop, and maintain backend systems and APIs, ensuring reliability, scalability, and performance.
• Implement and optimize authentication and billing workflows.
• Write comprehensive tests, including integration tests, to ensure high-quality code.
• Integrate 3rd-party APIs to enhance system functionality.
• Build and refine mechanisms to prevent abuse across the platform.
• Scale and improve billing systems for performance and accuracy.
• Transition billing functionality into a standalone service for modularity.
• Improve API resiliency to ensure high availability.

What will you add?

• Strong experience in backend development using C# and .NET.
• Proficiency with background processing/queueing systems such as RabbitMQ.
• Hands-on experience with databases like Clickhouse/InfluxDB and MariaDB.
• Proficiency in integration testing to ensure robust system interactions.
• Familiarity with monitoring tools like Grafana and CI/CD systems such as GitHub Actions.
• Experience with secure authentication workflows, including protocols like OAuth2 and OpenID Connect, and token-based authentication (e.g., JWT).
• Proven experience in designing and implementing secure systems to protect sensitive customer data, including encryption of data at rest and in transit.
• A proactive approach to solving complex problems, focusing on performance and scalability.
• Independence in managing tasks, paired with excellent collaboration and communication skills.

What will make us extra happy?

• Previous experience with billing or payment systems.
• Expertise in building and optimizing scalable, resilient distributed systems.
• Familiarity with Kubernetes and Prometheus for container orchestration and monitoring.
• Redis knowledge for caching and performance optimization.
• Experience with .NET Framework. Willingness to drive initiatives to upgrade to newer .NET versions
• A proven track record of implementing and optimizing CI/CD pipelines.
• Familiarity with fast-paced environments and a startup mindset.

What is in it for you?

At bunny.net, we invest in you. We want to provide significant benefits while also helping you maintain a healthy work & personal life.

• A competitive salary. You can expect above-average industry salaries.
• 100% flexible working hours. Work from anywhere, at your own schedule.
• Medical, dental, and vision insurance covers you all over the world.
• Paid Time Off. Love visiting the seaside? No problem - us, too. We offer 25 days of paid vacation (plus your local public holidays on top).
• Parental Leave. Bonding with the little ones is super important, so we offer parental leave and flexible scheduling to ease your way into parenthood.
• Home Office Budget. We believe everyone is more efficient working in a comfortable office, and we're happy to help you set it up with an annual budget of €500.
• Paid Sick Leave. Feeling ill? Take time off and get back to 100% without worrying about your finances.
• Mental Health Support. Feeling down? We've got your back. bunny.net provides mental health resources and help via BetterHelp.com.
• Wellness Budget. An annual well-being fund of €480 is here to help you stay fresh and focused.
• Educational Budget. Dedicated yearly learning and educational budget for books, seminars, and online courses.

We're ready if you are!