Principal Software Engineer at Verifone

Verifone

London, England, United Kingdom·9h ago

LeadFull-timeJavaSpringAWSDockerMongoDBREST APIMicroservicesAgileScrumCI/CD

Salary Range

$114,750 - $155,250 /year

Estimated

This salary is estimated based on similar roles. The actual salary may vary.

About the Role

We are looking for a Principal Software Engineer to join Verifone's global payment gateway platform. This role involves shaping the technical direction of systems that process high-volume, mission-critical financial transactions worldwide.

Key Responsibilities

→Design and evolve core platform capabilities for our global payment gateway system
→Guide architectural decisions across microservices
→Mentor engineers while remaining hands-on with critical systems
→Work closely with senior engineering, platform, product, and infrastructure partners
→Ensure systems scale globally, remain secure, and meet high standards for availability and performance

Requirements

✓Java 17 or higher
✓Spring Boot, Spring Web, Spring Data, Spring Security with JWT / OAuth2
✓Deep experience designing and operating microservice-based architectures
✓Strong application of clean code practices and SOLID principles
✓Ownership of system-level architecture and cross-service design decisions
✓Strong understanding of security, authentication flows, and data protection in distributed systems
✓Design and governance of RESTful APIs, JSON, and HTTP standards
✓API versioning and backward-compatibility strategies
✓MongoDB / NoSQL expertise, including data modeling, indexing strategies, and performance optimization
✓Advanced experience with Java concurrency, streams, and 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
✓Experience designing systems for scalability, resilience, and operability
✓Strong unit and integration testing practices using JUnit and Mockito
✓Ownership of quality standards, testability, and CI discipline
✓Experience working in Agile / Scrum environments and influencing engineering best practices
✓Principal-level backend engineering experience building and operating large-scale, high-performance systems
✓Approximately 8+ years of backend development experience, with several years working on production Java and Spring Boot services
✓Proven experience owning architecture and technical direction for critical backend platforms
✓Extensive production experience with MongoDB, including modeling, indexing, and performance optimization