Senior Backend Engineer - Remote (f/m/x)

Freelancing, Vollzeit · Remote

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: 30 days of paid vacation.
Professional Development: Annual education budget of €1,500.
Workation Opportunities: Combine work and vacation annually.
Diversity: Join an international team with diverse cultural backgrounds.

Please note: This is a fully remote position, but requires working within a German or European time zone to ensure smooth collaboration with the team.

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About us

Welcome! Bonjour! Selam! Olá! Hej!

We are 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 & fun team, always looking for new talents to join us. Looking forward to meeting you!

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Wir freuen uns auf dich!

Wir freuen uns über Ihr Interesse an der exmox GmbH. Bitte füllen Sie das folgende kurze Formular aus. Sollten Sie Schwierigkeiten mit dem Upload Ihrer Daten haben, wende Sie sich gerne per Email an hr@exmox.com.