Senior Software Developer

London, England, United KingdomFull-TimeSeniorOther

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For more than 40 years Verifone has established a remarkable record of leadership in the electronic payment technology industry. Verifone has one of the leading electronic payment solutions brands and is one of the largest providers of electronic payment systems worldwide.
Verifone has a diverse, dynamic and fast paced work environment in which employees are focused on results and have opportunities to excel. We take pride in the fact that we work with leading retailers, merchants, banks, and third party partners to invent and deliver innovative payments solution around the world. We strive for excellence in our products and services, and are obsessed with customer happiness. Across the globe, Verifone employees are leading the payments industry through experience, innovation, and an ambitious spirit. Whether it’s developing the next platform of secure payment systems or searching for new ways to bring electronic payments to new markets, the team at Verifone is dedicated to the success of our customers, partners and investors. It is this passion for innovation that drives each one of our employees for personal and professional success.

This role is part of Verifone’s global payment gateway platform, where engineering decisions directly impact the reliability, security, and performance of high‑volume financial transactions worldwide. You will work on backend services that sit at the core of payment processing, balancing scalability, data consistency, and security in a highly regulated environment.
The role is ideal for a senior backend developer who enjoys working on complex distributed systems, modern Java platforms, and cloud‑native architectures, and who takes ownership of systems that must perform reliably under real‑world load.

Java 17 or higher
Spring Boot
Spring Web (REST APIs)
Spring Data
Spring Security with JWT / OAuth2
Microservice‑based architectures
Clean code practices and SOLID principles
Experience designing scalable, fault‑tolerant backend services
Strong understanding of security, authentication flows, and data protection
RESTful API design using JSON and HTTP standards
API versioning strategies
MongoDB / NoSQL experience, including: Data modeling Indexing strategies Performance tuning
Data modeling
Indexing strategies
Performance tuning
Experience with Java concurrency, streams, and performance optimization
Data modeling
Indexing strategies
Performance tuning
AWS services including EC2, ECS/EKS, S3, RDS and/or DynamoDB, and CloudWatch
Docker and containerized deployments
CI/CD pipelines and Git‑based workflows
Unit and integration testing using JUnit and Mockito
Strong focus on testability, quality, and maintainability
Experience working in Agile / Scrum environments

Background in fintech or payments
Experience handling transactions, payment flows, and financial data
Understanding of high‑availability, security, and data consistency trade‑offs
Exposure to event‑driven architectures
Messaging or streaming technologies such as: Kafka AWS SQS Similar eventing systems
Kafka
AWS SQS
Similar eventing systems
Kafka
AWS SQS
Similar eventing systems
Advanced experience with AWS, Docker, and CI/CD practices
Production experience operating distributed systems at scale
Strong ownership mindset for services running in production

Verifone is committed to creating a diverse environment and is proud to be an equal opportunity employer. All qualified applicants will receive consideration for employment without regard to race, color, religion, gender, gender identity or expression, sexual orientation, national origin, genetics, disability, age, or veteran status. Verifone is also committed to compliance with all fair employment practices regarding citizenship and immigration status.