Senior Backend Engineer (Go) (m/w/d)

To strengthen our international team in Germany, we are offering a remote position starting immediately. If you are based outside of Germany, you need to be able to offer your services as a freelancer in the country you are based in. You need to be able to work Berlin time zone (CET / CEST).

We’re building a next-generation retail media platform that processes millions of events per day in near real time. As a Senior Backend Engineer, you’ll design, implement, and own critical services in Go that power our large-scale distributed systems.

Your Responsibilities

• Design and implement robust, scalable features and enhancements to our platform, with Go (Golang) as your primary language.
• Build and maintain our high-performance retail media platform, addressing near real-time requirements and large-scale data computation challenges.
• Collaborate closely with Product and Frontend teams to deliver innovative, end-to-end solutions in a fast-moving, agile environment.
• Mentor other engineers, promoting clean, maintainable, and high-quality code.
• Contribute to architectural decisions to ensure scalability, reliability, and consistency across distributed systems.
• Ensure best practices in testing, automation, and CI/CD workflows.

• Proven backend engineering experience with deep expertise in Golang, especially around concurrency, performance, and low-level system design.
• Strong background in building and optimizing high-performance, multi-threaded applications.
• Hands-on experience with container technologies like Docker and orchestration tools like Kubernetes.
• Experience working with cloud platforms such as Google Cloud Platform (GCP) or Amazon Web Services (AWS).
• Solid understanding of database systems, both SQL and NoSQL.
• Enjoy mentoring team members and helping others grow through technical guidance and knowledge sharing.

We know that the main reason people love their work is the people they work with. That's why we strive to create an open, collaborative, and inclusive environment where people can challenge each other, create together, and do great things. Our benefits include:

• As an emerging technology company, you participate in addition to your salary through our VESOP program with virtual company shares.
• We offer full flexibility regarding your working hours and location. We work remote-first.
• With many international colleagues in various countries, we offer our employees access to the best thinking on three continents and learning opportunities that come from working in global contexts.
• The base salary may vary depending on job-related knowledge, skills, experience, and location. We offer an annual bonus plan (average annual payout of 15% based on achieving company goals) in addition to the base salary as part of the compensation package, depending on the position offered.

Retail media is one of the fastest-growing segments in advertising and Pentaleap is at the centre of it. Founded just 1.5 years ago by two experienced ad tech specialists, including a WHU alumnus, Pentaleap has been growing revenue 4x YoY and was recently named Retail Media Infrastructure/Platform of the Year at The Drum Awards for Commerce Media 2026.

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