Senior Backend Engineer (f/m/x) - #2182963

Your mission

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'll work alongside data scientists, product specialists, and frontend developers to drive measurable impact across millions of daily user interactions.

• 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.
  
  

Your profile

• 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.
  
  

Why us?

• 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

Please note: this is not a remote only position, we offer you a flexible hybrid model here in Hamburg, Germany - working from home on Mondays & Fridays, coming to the office on Tuesday, Wednesday & Thursday!

About Us

Welcome! Bonjour! Selam! Olá! Hej!

We are exmox - a Hamburg based mobile marketing agency, connecting advertisers with their highest value users through our owned and operated apps. We created an innovative business model that focuses on rewarding users for testing and engaging with the apps of our clients. Our products are available in DACH, US, UK & Canada.

Right now round about 80 employees from all over the world are working here with us in Hamburg. We are a divers & funny team, always looking for new talents to join us. Looking forward to meeting you!