Senior Backend Engineer (Ad-Tech)

TL;DR

Senior Backend Engineer (Ad-Tech): Designing and scaling high-throughput backend systems and APIs for an Ad-Tech platform with an accent on real-time decision-making, performance tracking, and data-intensive event processing. Focus on building low-latency, reliable services, integrating third-party platforms, and mentoring engineers.

Location: Fully remote with requirement to work within German or European time zones

Company

Hamburg-based mobile marketing agency connecting advertisers with high-value users through owned apps, operating in DACH, US, UK, and Canada regions.

What you will do

• Architect and build scalable backend systems for real-time ad delivery and performance tracking.
• Design efficient REST and GraphQL APIs for internal and external use.
• Work on data-intensive components including event processing and attribution tracking.
• Ensure high performance and reliability under load using profiling, caching, and horizontal scaling.
• Integrate with third-party platforms and analytics tools via RESTful APIs.
• Contribute to containerized deployments and observability with Docker and Kubernetes.
• Mentor engineers and lead architecture reviews.
• Collaborate cross-functionally with product and data teams to improve campaign effectiveness.

Requirements

• Must have 5+ years backend experience, including 2+ years in high-volume data environments (Ad-Tech preferred)
• Strong Python skills with experience in FastAPI, Flask, or similar
• Experience with REST and GraphQL API design
• Knowledge of distributed systems, queues (Kafka, RabbitMQ), and event-driven architectures
• Experience with Docker, Kubernetes, and cloud infrastructure
• Ability to work remotely within German or European time zones

Nice to have

• Ad-Tech domain knowledge including ad serving, tracking, fraud prevention, or real-time bidding
• Strong analytical and problem-solving mindset
• Excellent communication skills for cross-disciplinary collaboration

Culture & Benefits

• 30 days paid vacation
• Annual education budget of €1,500
• Workation opportunities combining work and vacation
• Diverse international team