Senior Software Engineer — Real-Time Ad Serving

About This Opportunity

We are representing a confidential adtech organization seeking a Senior Software Engineer to join their real-time ad serving team in Berlin. Our client operates a high-performance programmatic advertising platform processing billions of daily transactions, and they need an experienced backend engineer to design and develop the business logic that powers ad selection, targeting, budget pacing, and delivery optimization at scale.

This is a hybrid/remote role based in Berlin, Germany, offering the opportunity to work on systems that handle 200K+ requests per second with strict latency requirements. The platform is built on C++ and Lua, with Lua implementing the core business logic layer. While experience in any backend language is valued, a willingness to learn and work with Lua is essential.

Responsibilities

• Develop and optimize business logic in Lua for ad selection, targeting, frequency capping, and budget pacing
• Design, build, and maintain real-time services processing 200K+ requests per second with strict latency requirements
• Collaborate closely with Product teams to deliver features that meet advertiser and publisher needs
• Ensure code quality through code reviews, automated testing, and continuous integration practices
• Participate in architecture discussions and influence the technical roadmap
• Participate in on-call rotation to support production systems

What We're Looking For

• 5+ years of software engineering experience in backend development
• Deep understanding of computer science fundamentals: data structures, algorithms, and performance optimization
• Experience building and operating distributed systems in production environments
• Exposure to the full software development lifecycle — from design to production and monitoring
• Strong commitment to code quality, automated testing, and documentation
• Proficient English communication skills
• Experience with Lua or demonstrated willingness to learn (training and support provided)
• Experience in online advertising, adtech, RTB, or programmatic platforms is a plus
• Proficiency in a systems-level language (C++, Go, Rust, or Java) is a plus
• Experience with MongoDB and real-time data processing is a plus
• Experience with cloud infrastructure (AWS) at scale is a plus
• Experience with OpenRTB protocol and ad exchange integrations is a plus

How We Work With You

When you apply through Get A Job.ai, our talent team will review your profile and conduct an initial screening to ensure alignment with the role requirements. If we move forward together, we will submit your candidacy to our client and guide you through their interview process. Please do not contact the client directly — all communication should flow through our recruiting team to ensure the best experience for everyone involved.

Pay

Compensation details will be discussed during the screening process and are competitive with the Berlin market for senior backend engineering roles.

Equal Employment Opportunity: Get A Job.ai is committed to inclusive hiring practices. We consider applicants for employment without regard to race, color, religion, sex, sexual orientation, gender identity, national origin, age, disability, veteran status, or any other protected characteristic.