Senior Backend Engineer - Remote

Overview

As a Senior Backend Engineer, you’ll be instrumental in designing and scaling the systems that power our Ad-Tech platform including high-throughput tracking pipelines. You will work alongside data scientists, product specialists, and frontend developers to drive measurable impact across millions of daily user interactions.

In Short

• Architect and build high-scale backend systems to power real-time decision-making, ad delivery, and performance tracking.
• Design efficient APIs and services that serve internal teams and external partners with low-latency and high reliability REST and GraphQL included.
• Work on data-intensive components, including event processing, attribution tracking, and campaign performance monitoring.
• Ensure high performance under load, applying profiling, caching strategies, and horizontal scaling to keep systems fast and reliable.
• Integrate with third-party platforms, including MMPs, and analytics tools, using RESTful APIs.
• Contribute to containerized deployments and observability using Docker, Kubernetes, and modern monitoring stacks.
• Mentor and guide engineers through complex technical challenges, architecture reviews, and clean, scalable design.
• Collaborate cross-functionally with product and data teams to deliver features that directly influence campaign effectiveness and advertiser ROI.

Requirements

• 5+ years of backend engineering experience, with at least 2+ in a high-volume, data-rich environment (Ad-Tech preferred).
• Strong Python expertise, with production experience in FastAPI, Flask, or similar frameworks.
• Deep understanding of API design and backend system integration. Familiarity with both REST and GraphQL.
• Experience with distributed systems, queues (e.g., Kafka, RabbitMQ), and event-driven architectures.
• Strong performance tuning and scaling skills, especially in latency-sensitive systems.
• Experience with Docker and Kubernetes, and a solid grasp of cloud infrastructure and container orchestration.
• Ad-Tech familiarity: Experience with ad serving logic, tracking systems, fraud prevention, or real-time bidding is a significant plus.
• Analytical mindset: You think in systems, solve problems holistically, and love optimizing for scale and efficiency.
• Strong communicator: Comfortable working across disciplines and articulating complex technical concepts in a business-aware context.

Benefits

• Work Life Balance - We value rest and work life balance, we offer you 30 days of paid vacation days.
• Commuter Benefits - We provide you with public transportation tickets.
• Professional Development - We support you in deepening your skills and provide you an annual education budget of 1.500€.
• Workation - Combine Vacation with work: we offer annual workation opportunities.
• Gym membership - Wellpass - With Wellpass you can use more than 7000 Spas/ Gyms/ etc. in Germany.
• Catering - We offer monthly team lunches, daily fruits and vegetables and every beverage you could wish for.
• Flexibility - Benefit from flexible working hours and working from home.
• Corporate Benefits - Benefit from exclusive discounts for big brands & platforms.
• Diversity - We are an international team of talented people with different cultural backgrounds.
• Fun and Games - We have a big socializing area to make room for having relaxing activities within the working day.
• Desk Setup - Wherever you work, we will provide you with your workspace utensils.