Software Developer (Security Lab) – Germany

Join our innovative Security Lab , an international team solving real-world challenges in email security using modern technologies and practical solutions. Email is still the backbone of global communication—and one of the main targets for cyberattacks. Today, we protect over 1.4 billion mailboxes worldwide. As a Software Developer , you will help build and improve services that secure digital communication while continuously learning new technologies and collaborating with colleagues across Germany, Spain, France, and North Macedonia. This is a full-time position (40h/week) based in our Hannover (List) office , starting as soon as possible.

Your Job

• You design, develop and continuously improve services related to email security.
• You apply pragmatic solutions to optimize the platform for performance, security, scalability, and reliability.
• You collaborate with cross-functional teams to design and implement new email security features .
• You troubleshoot and resolve platform performance and security issues with a practical, results-oriented approach.
• You write comprehensive unit and integration tests to ensure software quality.
• You contribute to platform improvements through code reviews, practical best practices, and continuous refinement .
• You help create and enhance tools for managing and automating email filtering and security policies , always considering real-world use cases and performance.

Your Profile

• You hold a bachelor’s degree in Computer Science, Engineering, or a related field.
• You have at least 4 years in software development , including one year or more of production-level Go experience. Familiarity with C, C++, C# or Java is a plus.
• You have a background in network-based applications , particularly email security or similar messaging services.
• You are proficient with version control systems, particularly Git .
• You are familiar with Linux/Unix environments and command-line tools.
• You have knowledge of containerization technologies like Docker and Kubernetes is a plus.
• You have practical problem-solving abilities and attention to detail.
• You are able to communicate and collaborate effectively within a diverse, international team.
• You are proficient in English , both written and spoken.

Nice to Have

• You have experience working with high-volume email processing or message traffic systems.
• You have practical experience using AI-assisted development tools and workflows.
• You have knowledge of cybersecurity practices related to email services.
• You are familiar with automated testing frameworks and CI/CD pipelines.
• Temporary Employee Exchange Program – we support you in working from our global office locations while exploring the world (e.g., Malta, Madrid, Montréal, Washington, D.C.).
• Work-from-home option and flexible working hours.
• Team events like laser tag, an escape room, or a get-together at our own legendary beer truck in Hanover – let yourself be surprised!
• Be-Active Bonus – we subsidize your gym memberships.
• Whether by car, public transport, or bike – we make your commute easier with free parking, a GVH JobCard (Hanover), a tax-free commuting allowance (Berlin), or bike leasing.
• Employer contribution to the company pension plan.
• Referral Bonus: €1,500 for every successful candidate referral.
• And of course, the usual standards like 30 days of vacation, permanent contracts, development opportunities, coffee, tea, soft drinks & fresh fruit, office dogs, no dress code, and much more!