Senior Software Engineer - Pay Sustainable Engineering

About Us

Perk (formerly TravelPerk) is the intelligent platform for travel and spend management. Built to tackle the time-consuming, manual work that gets in the way of real work, our tools automate everything from travel bookings to expenses, invoice processing, and more. By eliminating this shadow work that wastes hours, erodes morale, and saps innovation, we’re on a mission to power real work, with real impact. We’re trusted by more than 10,000 companies worldwide, including Wise, On Running, Breitling, and Fabletics, and we’re tackling the 7 hours of lost productivity per employee each week, a $1.7 trillion problem. Founded in 2015, Perk has grown into a global company of more than 1,800 people across 12 offices globally, with headquarters in London and Boston. We combine innovation, control, and simplicity to transform how businesses work and how people feel at work. At Perk, we’re driven by our values, like being an owner, delivering a 7-star experience, and working as one team. We value curiosity, purpose, and mindset, not just knowledge, to unlock the power in your potential. Our talent team brings together leading minds from the travel and SaaS industries, representing over 70 countries. If you’re excited about having a real impact and shaping how millions of people experience work, we’d love you on the team. Visit www.perk.com to learn more. As a Senior Software Engineer on the Pay Sustainability Engineering team, you’ll help drive the long-term reliability, scalability, and evolution of our payments, financial and billing ecosystems. The team operates across two complementary tracks. The first focuses on firefighting and platform support, helping engineering teams navigate critical incidents, unblock complex technical challenges, and improve coordination across the broader payment infrastructure. Rather than acting as a delivery team for operational work, you’ll provide technical leadership, platform-wide visibility, and guidance that helps teams resolve issues effectively and prevent recurring problems. The second track focuses on medium- to large-scale sustainability initiatives across the payments domain. This includes identifying technical debt, platform limitations, architectural weaknesses, and product gaps that impact the long-term health of the ecosystem. You’ll lead initiatives that improve the resilience, maintainability, and scalability of the platform through thoughtful refactors, system redesigns, and engineering improvements that create lasting impact. As a senior engineer, you’ll play a key role in defining what sustainability engineering means within the Pay organization. You’ll partner closely with engineering and product teams to shape the value proposition of the function, prioritize high-impact opportunities, and provide technical direction across complex cross-functional initiatives. Through strong technical leadership, systems thinking, and a focus on sustainable engineering practices, you’ll help build a healthier, more scalable payments platform that enables teams to move faster with greater confidence. ##