Senior Software Engineer

Unstoppable starts with people. The future of payments is being built today, and at Paymentology, we are looking for people who want to help shape it. We power card issuing for leading banks, fintechs and digital brands across the globe, and as we continue to grow, we are looking for curious, ambitious people who thrive on solving complex challenges, embrace innovation and want to make a tangible impact at global scale. Our Engineering culture values autonomy, excellence, ownership, and curiosity. We encourage engineers to lead solutions end-to-end, mentor others, and continuously improve how we build and operate software. If you’re excited by solving complex global payments challenges and enjoy working with smart, kind, mission-driven people — this is the place for you. What you get to do: We’re looking for a Senior Software Engineer to design, build, and scale Java backend services that power our global payments infrastructure. You’ll lead end-to-end delivery, contribute to technical strategy, and help raise the engineering bar across the organisation. Lead the design and development of backend services, distributed systems, and APIs. Own features end-to-end (architecture, coding, testing, observability, and deployment). Write clean, maintainable, well-tested code, following engineering best practices and test-driven development. Break down complex technical work into manageable chunks Work in a collaborative, cross functional, agile team environment Mentor associate and mid-level engineers, fostering a culture of technical excellence Identify, document, and deliver technical improvements (performance, reliability, scalability). Participate in incident response and support rotations This role includes participation in an on-call rotation, with on-call duties scheduled for one week out of every five weeks. Requirements: Experience: Significant commercial experience with modern Java 15 (We’re currently moving to 21. As a guide, multiple projects with 5+ years of experience. Proven experience designing, building and maintaining distributed systems and microservices) Deep understanding of Object-Orientated programming Familiarity with event-driven architectures or Domain Driven Design. Strong system design experience, including designing scalable, resilient, and high-performance distributed applications, with the ability to make architectural decisions and evaluate technical trade-offs. Love to work using TDD Strong grasp of relational databases (PostgreSQL, MySQL) and data modeling. Solid understanding of cloud infrastructure (AWS preferred), containerisation, CI/CD, and Infrastructure-as-Code. Experience in fintech, payments, or other high-throughput/regulated domains. Most importantly, a desire to learn, grow and collaborate with an amazing team What you can look forward to: 100% remote, globally distributed team We value engineers that closely understand our customers and business High-impact role supporting real-time global payments Growth path toward Senior Engineer 2, Staff Engineer, or Engineering Manager A diverse, mission-driven engineering culture At Paymentology, we believe that making a difference starts with the people behind the work. You will be part of a diverse, global team of Paymentologists who are united by a shared mission to advance the world through payments. This is an opportunity to contribute to meaningful work, collaborate across markets and functions, and help shape the future of a business with global reach and real impact. We are an equal opportunity employer committed to fostering a diverse and inclusive workplace where everyone can thrive. We welcome applications from people of all backgrounds and do not discriminate on any unlawful ground, including race, colour, ethnicity, sex, gender, pregnancy, marital status, family responsibility, age, disability, sexual orientation, religion, belief, language or HIV status. Paymentology will never request any form of payment from applicants at any stage of our recruitment process, including for applications, interviews, training or job placements. If anyone asks you for money while claiming to act on behalf of Paymentology, please treat this as fraudulent and do not make any payment. All legitimate Paymentology vacancies are advertised via our official careers page , and our recruitment emails are sent only from official Paymentology domains.