Senior Backend Engineer – AdTech

We are looking for a Senior Backend Engineer to join our AdTech team at Depop, helping to build and scale the systems that power advertising and monetisation across the platform.

Responsibilities

• Partner with Product, Data Science, and Engineering teams to design and build scalable AdTech systems that support ad delivery, ranking, and measurement.
• Develop and maintain backend services that operate at high scale and low latency, supporting real‑time decision making.
• Contribute to the design of event‑driven systems and data pipelines that power experimentation and performance insights.
• Own your services end‑to‑end, including development, deployment, monitoring, and incident response.
• Write high‑quality, maintainable code and contribute to improving engineering standards, performance, and reliability.
• Participate in architecture discussions, helping evolve systems to support future product and business needs.
• Collaborate with engineers across teams to tackle complex problems and deliver impactful features.
• Support a culture of continuous improvement through code reviews, post‑mortems, and knowledge sharing.
• Mentor and support other engineers, contributing to the growth of the team.

Qualifications

You’ll be an excellent fit if you have:

• Experience building and operating scalable backend systems, ideally in a consumer or marketplace environment.
• Strong programming skills in Scala (or willingness to learn), Java, or similar backend languages.
• Experience designing and working with distributed systems and event‑driven architectures.
• Familiarity with messaging systems such as Kafka or RabbitMQ.
• Experience working with relational or non‑relational databases (e.g. PostgreSQL, DynamoDB).
• Experience with cloud infrastructure (AWS preferred) and modern DevOps practices (CI/CD).
• Strong problem‑solving skills and the ability to work independently while collaborating effectively with others.
• Good communication skills and the ability to work cross‑functionally with both technical and non‑technical stakeholders.

Bonus Points

• Experience working in AdTech, recommendations, ranking, or experimentation platforms.
• Experience with high‑throughput systems handling real‑time data or decisioning.
• Experience in eCommerce, marketplaces, or data‑driven product environments.
• Familiar with infrastructure‑as‑code tools such as Terraform.

Equal Opportunity Employer

Depop is an equal opportunity employer. We provide employment opportunities without regard to age, ethnicity, religion, gender identity, sexual orientation, disability, pregnancy, or any other protected status.

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