Senior/Staff Android Engineer (d/f/m) – Advertising Platform

Overview

Kleinanzeigen is the leading online classifieds market in Germany. Users buy and sell on Germany's No. 1 for classifieds mainly second-hand. In this way they make an active contribution to more sustainability. On average, more than 55 million ads are available in numerous categories – from children's supplies to electronics and real estate. Kleinanzeigen also offers small and medium-sized businesses the opportunity to present their services online. Around 35 million users per month make Kleinanzeigen one of the most widely used websites in Germany. Kleinanzeigen was launched in September 2009 as eBay Kleinanzeigen. Since June 2021, the company has been part of Adevinta, a global provider of online classified ads. In May 2023, the name was changed to Kleinanzeigen.

Job Description

Job Description Kleinanzeigen is the leading online classifieds market in Germany. Users buy and sell on Germany's No. 1 for classifieds mainly second-hand. In this way they make an active contribution to more sustainability. On average, more than 55 million ads are available in numerous categories – from children's supplies to electronics and real estate. Kleinanzeigen also offers small and medium-sized businesses the opportunity to present their services online. Around 35 million users per month make Kleinanzeigen one of the most widely used websites in Germany. Kleinanzeigen was launched in September 2009 as eBay Kleinanzeigen. Since June 2021, the company has been part of Adevinta, a global provider of online classified ads. In May 2023, the name was changed to Kleinanzeigen.

In Berlin, we are looking for a Senior/Staff Android Engineer (d/f/m) to join our Advertising Team!

Our team's mission is to drive monetization through a highly advanced advertising infrastructure. We integrate industry-leading advertising SDKs and build shared technical foundations that enable multiple feature teams to seamlessly distribute advertising campaigns across our applications. We focus on scalability, consistency, and the long-term sustainability of our mobile platforms and SDKs, requiring deep technical expertise and strong cross-platform collaboration.

This is a hybrid role, based in Berlin, offering flexibility to work remotely and in-office.

Job requirements

Who You Are

• 5+ years of professional experience developing Android applications, ideally in large-scale or multi-team environments.
• Proven experience providing technical leadership beyond a single team (e.g. platform ownership, guild leadership, architectural responsibility).
• Strong expertise in Android application and platform architecture, including modularization, dependency management, and API design.
• High proficiency in Kotlin and Gradle, with a solid understanding of modern Android development practices.
• Experience working with shared codebases, frameworks, or platform-level components.
• Strong understanding of performance optimization, stability, security, and privacy considerations on Android.
• Hands-on experience with CI/CD systems and automated testing strategies (e.g., Jenkins, GitHub Actions, unit and UI testing).
• Excellent communication skills, able to explain complex technical concepts to a wide range of stakeholders.
• Comfortable driving alignment and influencing technical decisions without formal authority.
• Familiarity with agile development methodologies and cross-functional collaboration.
• Bachelor’s degree in Computer Science, Software Engineering, or equivalent professional experience.

Job responsibilities

The Role

• Provide technical leadership and architectural ownership for cross-team Android advertising initiatives, focusing on our built-in monetization SDKs and advanced infrastructure.
• Lead the technical strategy and integration of complex third-party advertising SDKs (Google, Amazon, Meta), ensuring optimal performance, privacy compliance, and stability.
• Cross-coordinate actively with the iOS team to ensure unified architectural approaches, seamless cross-platform ad distribution, and alignment on overarching technical strategies.
• Act as a technical authority for Android platform topics, supporting and advising multiple feature teams to ensure the holistic delivery of high-quality experiences.
• Collaborate closely with platform architects to shape a robust, scalable, and maintainable mobile architecture aligned with the company’s monetization goals.
• Identify systemic technical challenges (e.g., ad load performance, stability, SDK fragmentation, tech debt) and proactively drive sustainable solutions.
• Improve developer experience and productivity by evolving tooling, CI/CD pipelines, testing strategies, and platform abstractions for ad integrations.
• Mentor and coach Engineers and emerging technical leaders, helping raise overall mobile engineering standards.
• Create and maintain technical documentation, including architecture overviews, ADRs, and cross-platform guidelines for ad distribution.

Job benefits

Benefits at Kleinanzeigen

• Flexible working time (hybrid)
• 20 days “work from anywhere”
• Paid additional parental leave for both parents
• Extra paid days off for special occasions (e.g. your wedding or a move)

• Confidential support & coaching for you and your loved ones
• Annual company sports events
• Pension and life insurance

• Personal development budget
• Learning opportunities to grow your skills and career

• Corporate benefits and exclusive discounts
• An attractive referral program
• Transportation allowance
• Free shipping on Kleinanzeigen Direktkauf

Kleinanzeigen is an equal opportunity employer that values diversity and inclusion. We welcome people of all backgrounds, races, religions, colours, national origins, gender identities, sexual orientation, ages, marital status, or disability.

If this role sparks your interest but you’re not sure you meet every single requirement, we’d still love to hear from you anyway.