Senior Software Engineer - Time - London

Personio's intelligent HR platform helps small and medium-sized organizations unlock the power of people by making complicated, time‑processing 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.

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 HR.
• The team owns a business‑critical initiative tied to expansion revenue.
• Much 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 workflows.
• Design services that ensure Time data flows accurately into Payroll and Money systems.
• Improve system reliability, scalability, and performance in a correctness‑critical domain.
• Work on greenfield initiatives where requirements are still being shaped.
• Collaborate closely with Product, Design, Payroll, and Platform teams.
• Take ownership of features end‑to‑end, from design through to production.
• Contribute to architectural decisions and raise the engineering bar across the team.

What We’re Looking For

• Strong backend engineering experience in production systems.
• Experience building scalable, reliable services (ideally distributed systems).
• Solid programming skills in Java, Kotlin, or similar.
• Comfort working in ambiguous, fast‑paced environments.
• A strong sense of ownership and accountability.
• Clear communication and collaboration skills.

Nice to Have

• Experience working on systems involving time tracking, payroll, fintech, or other regulated domains.
• Exposure to data‑heavy or correctness‑critical systems.
• Full‑stack experience (helpful but not required).

Team & Environment

• High‑performing, ambitious team based in London.
• Strong in‑office culture with regular collaboration.
• Cross‑functional setup with Product, Design, Money, Payroll, and Platform.
• Greenfield 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 equity.
• 28 days holiday, plus additional days with tenure.
• 1 Impact Day per year.
• Hybrid working (2 days per week in the London office).
• 20 Flex Days to work from anywhere in Europe.
• Strong engineering culture focused on ownership, quality, and growth.