Senior Software Engineer

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? Senior Software Engineer – Time & Money (d/f/m) Time & Money Full Time London About The Role Join the Time & Money domain at Personio, where we’re building critical systems that sit at the heart of our product. The Time domain powers how employee working time, absences, and compensation data are captured and processed. This data directly impacts payroll accuracy, compensation workflows, and ultimately customer trust. As we expand into the mid-market, this area is becoming increasingly central to enabling business growth. You’ll work on high-impact, often greenfield problems, helping shape how Time data flows seamlessly into Money and Payroll systems in a scalable, reliable way. Why This Role Exists Now We’re at a pivotal stage of growth. Time & Money sits at the intersection of payroll, compensation, and core HRThe team owns a business-critical initiative tied to expansion revenueMuch of the problem space is still evolving, with scope for strong engineering ownership This means we need engineers who are comfortable navigating ambiguity, shaping solutions early, and building systems that scale with the business. What You’ll Do Build and evolve backend systems that power time tracking, absences, and compensation workflowsDesign services that ensure Time data flows accurately into Payroll and Money systemsImprove system reliability, scalability, and performance in a correctness-critical domainWork on greenfield initiatives where requirements are still being shapedCollaborate closely with Product, Design, Payroll, and Platform teamsTake ownership of features end-to-end, from design through to productionContribute to architectural decisions and raise the engineering bar across the team What We’re Looking For Strong backend engineering experience in production systemsExperience building scalable, reliable services (ideally distributed systems)Solid programming skills in Java, Kotlin, or similarComfort working in ambiguous, fast-paced environmentsA strong sense of ownership and accountabilityClear communication and collaboration skills Nice to have: Experience working on systems involving time tracking, payroll, fintech, or other regulated domainsExposure to data-heavy or correctness-critical systemsFull-stack experience (helpful but not required) Team & Environment High-performing, ambitious team based in LondonStrong in-office culture with regular collaborationCross-functional setup with Product, Design, Money, Payroll, and PlatformGreenfield scope with real ownership and impact The team works on business-critical problems where engineering quality directly impacts customer trust and revenue. Why Personio At Personio, we’re building the People Operating System for Europe, helping thousands of companies simplify HR and payroll processes. You’ll benefit from: Competitive salary, benefits, and pre-IPO equity28 days holiday, plus additional days with tenure1 Impact Day per yearHybrid working (2 days per week in the London office)20 Flex Days to work from anywhere in EuropeStrong engineering culture focused on ownership, quality, and growth