Senior Platform Engineer

Who you are

• This is a role for someone who wants to push the frontier on AI tooling and also cares about the platform work that hundreds of people quietly rely on every day
• 6+ years of experience shipping web-based software, with a strong preference for TypeScript or Kotlin stacks
• AI-first mindset: you are actively exploring where AI helps, you champion responsible adoption, and you run quick experiments measured against real impact rather than hype
• You are comfortable owning work end to end: understanding an ambiguous problem, shipping it, and seeing it through to real adoption rather than handing off a prototype
• You have a genuine product sense for your users. You would rather watch an engineer hit friction than guess at it, and you use data and telemetry to decide what to fix
• You learn fast, unblock yourself and your team, and stay on a problem until the right version of it is solved
• Experience building developer tooling / Developer Experience initiatives (e.g., internal platforms, CLI tools, SDKs, templates, golden paths, CI/CD improvements)
• Experience with GraphQL, particularly in building middleware or gateway layers
• Strong Gradle experience
• Note: We welcome Senior Backend Engineers who are excited to move closer to Developer Experience and platform enablement. Direct DevEx/platform-tooling experience is great, but not required

What the job involves

• 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
• Build and maintain the core developer platform: CI/CD, everyday developer workflows and tooling, our Backstage developer portal and service catalog, and the build, test, and release infrastructure the whole organisation runs on
• Design and ship AI-assisted developer tooling: plugins, skills, agents, and automations that remove real toil from how engineers write, review, test, and ship code
• Help take our AI ambitions further, from the internal Claude Code platform to cloud-hosted agents running inside Personio's own infrastructure and automated code review
• Treat developer experience like a product: talk to your users (other engineers), find the friction, measure it with real telemetry, and ship improvements that move the numbers
• Own work end to end, from a rough problem statement through design, build, rollout, and the adoption work that makes sure people actually use what you built
• Run platform-wide migrations and upgrades that span many services, keeping things moving without breaking the teams who depend on you
• Keep the platform reliable and fast, reason about failure modes, performance, and cost, and take your turn on call for the systems we own
• Raise the bar across engineering: make it hard to do the wrong thing, evangelise the tools that work, and remove the organisational friction that slows adoption

Benefits

• 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 (because we love what we do, but we also love vacation!)
• Make an impact on the environment and society with Impact Days
• Receive generous family leave, child support, mental health support, and sabbatical opportunities with PersonioCares
• Connect with your fellow Personios at regular company and team events like All Company Culture Week and local year-end celebrations
• Engage in a high-impact working environment with flat hierarchies and short decision-making processes
• Find your best way to work with our office-led, and remote-friendly PersonioFlex!