Platform Engineer - Developer experience L4 (f/m/d)

Personio's intelligent HR platform helps small and medium-sized organizations unlock the power of people by making complicated, time-consuming tasks simple and efficient. Our team of 1,500 Personios is building user-friendly products that delight our 15,000+ customers and their 1.5 million employees. Ready to make an impact from day one? The Role This role requires 2 days per week in the office and is based in Munich or Dublin. Join us to shape the future of software in the underserved and high-impact HR technology industry. Your work will have a direct and tangible impact on customers, offering ownership and the chance to make a meaningful difference. As we prepare for significant growth, you'll face exciting challenges and have the opportunity to influence our path toward becoming one of the world's leading tech companies. This role is ideal for a highly collaborative engineer who thrives in a centralised platform role and is passionate about developer productivity and platform excellence. As a Platform Engineer (Developer Experience), you will play a key role in building and evolving platform solutions—such as internal tooling, SDKs, paved-road workflows, and middleware—that empower hundreds of developers to ship faster and more reliably. What You'll Do Design and support platform solutions that empower 300+ developers across 40+ product teams (e.g., internal tooling, standards, SDKs, and middleware that improve developer workflows)Build and evolve our gRPC-GraphQL gateway that connects frontends with backend servicesCreate internal tools and libraries/SDKs to enhance developer productivity and platform adoptionAnalyse and optimise platform systems to enhance scale, performance, reliability, and developer experienceWork hand-in-hand with product teams to ensure seamless platform integration and a strong feedback loopDocument platform capabilities and run internal training sessionsCollaborate with other platform teams to create a coherent developer platformDrive technical excellence by simplifying platform architecture and managing technical debt What You Need To Succeed 3+ years of experience in platform engineering and/or backend developmentStrong programming skills in a JVM language (e.g., Kotlin, Java, Scala); Kotlin is a bonusExperience building production-grade backend systems with attention to reliability, performance, and maintainabilityA strong engineering mindset for enabling other teams: you enjoy reducing friction, improving “paved roads,” and raising standards through tooling and automationExperience with modern engineering practices for high-availability platforms, including testing strategies, performance optimization, and reliability considerationsExperience in establishing observability practices and instrumenting platforms for monitoring and debuggingYou are data-driven and passionate about using metrics to evaluate platform performance and adoptionStrong communication skills, with the ability to build relationships across teamsComfortable working in a highly collaborative environment, engaging in code reviews, pair programming, and cross-team discussions Nice to Have Experience building developer tooling / Developer Experience initiatives (e.g., internal platforms, CLI tools, SDKs, templates, golden paths, CI/CD improvements)Experience with gRPC and GraphQL, particularly in building middleware or gateway layersExperience working with KafkaStrong Gradle experience Note: We welcome Backend Engineers who are excited to move closer to Developer Experience and platform enablement. Direct DevEx/platform-tooling experience is great, but not required. Why Personio? Personio is an equal opportunities employer, committed to building an integrative culture where everyone feels welcomed and supported. We embrace uniqueness and understand that our diverse, values-driven culture makes us stronger. We are proud to have an inclusive workplace environment that will foster your development no matter your gender, civil status, family status, sexual orientation, religion, age, disability, education level, or race. At Personio, we value in-person collaboration while also offering flexibility. This role is office-based, with 2 days per week required in your contracted office location. The remaining days can be worked from home or in the office if you prefer. In addition, you’ll have 20 Flex Days per year to work remotely from other locations. Aside from our people, culture, and mission, check out some of the other benefits that make Personio a great place to work: Receive a competitive reward package – reevaluated each year – that includes salary, benefits, and pre-IPO equity.Enjoy 28 days of paid vacation, plus an additional day after 2 and 4 years.Make an impact on the environment and society with 1 (fully paid) Impact Day.Receive generous family leave, child support, mental health support (including 24 sessions per year with Oli for yourself and 10 sessions for a significant other), and sabbatical opportunities.We enjoy gathering for meals, cultural initiatives, and events like local Summer Sessions and year-end celebrations. There's also healthy snacks, drinks, and a weekly catered lunch.