Principal Engineer; d​/f​/m

Job description

is Germany’s largest vehicle marketplace, with more than 1.6 million listed cars, commercial vehicles, motorcycles, and e-bikes (annual average 2025). Both private customers and registered vehicle dealers use the platform and benefit from more than 140 million visits per month*. As a “one‑stop shop,” ’s offering includes not only buying and selling, but also financing and leasing solutions. Founded in 1996, the company is a subsidiary of Adevinta, a global leader in online classified portals.

Based in Berlin‑Charlottenburg, we offer a dynamic environment where growth, learning, and collaboration are at the heart of everything we do. If you are driven by an eagerness to disrupt, have a passion for collaboration, and are excited about shaping the future of mobility, we would love to hear from you.

This role is embedded in the Consumer Orientation & Specification (COS) cluster, one of 's three core Product & Tech (P&T) clusters. We are looking for a hands‑on Principal Engineer to provide technical leadership across our Consumer engineering organization. This is a senior individual‑contributor role for someone who combines deep technical expertise with strong collaboration, communication, and mentoring skills. You will work closely with Tech Leads, engineers, product, QA, and data stakeholders – including external contractor teams – to improve alignment, reduce duplication, and enable teams to build scalable, maintainable, and high‑quality solutions.

As the majority of our Consumer traffic comes from our Native Apps, a solid understanding of Native engineering and mobile‑first thinking is important in this role.

You are someone who doesn’t just keep up with AI — you lead by example, making AI tooling a natural part of how you and your teams work. And when it comes to aligning people around a technical direction, your communication and storytelling skills are just as sharp as your engineering instincts.

As a Principal Engineer, you are the key connection between the Consumer engineering organization and the Platform Team, acting as a multiplier by translating platform direction into actionable guidance for the Consumer Area’s Tech Leads. You actively build and nurture a technical community among those Tech Leads, while staying closely connected to fellow Principal Engineers across  Together, this group of senior technical leaders drives alignment on guidelines, architectural decisions, and the Tech Radar – ensuring that technical direction is consistent, well‑communicated, and grounded in a shared understanding of 's system landscape.

• Extensive hands‑on experience in software engineering, with a proven track record at senior or principal level
• Experience working on high‑volume traffic platforms
• Interest in Native App development, including its ways of working and software delivery processes
• Ability to design and evolve architectures for complex, large‑scale software systems, with a strong sense of strategic and system‑level thinking
• Experience with scalable distributed systems, APIs, and end‑to‑end system design
• Strong understanding of QA practices, observability, operational excellence, and cost‑aware engineering (Fin Ops) to demonstrate end‑to‑end ownership, from development through to operations
• Experience collaborating closely with data teams or working on data‑intensive systems
• Excellent communication and storytelling skills, with the ability to manage stakeholders and influence and align across teams and functions without direct authority
• Drives decisions by informed consent — ensuring the best technical argument wins, and committing decisively once a direction is set
• Experience providing technical guidance and mentoring to Tech Leads or senior engineers
• Participation in or leadership of cross‑team technical communities such as a Community of Practice
• Active user of AI coding and productivity tools, with a growth mindset towards further AI adoption
• Fluent English;
  German is a nice‑to‑have given our Berlin office context

• Lead and align Consumer Area‑wide architectural decisions, enabling teams to make sound technical…