Senior Java Developer - Payments

to join a team developing and supporting modern payment-processing systems. This position is offered initially as a six-month contract on a contractor basis. You will build secure, reliable, and high-performing backend applications using Java, Spring Boot, and microservices. The role involves connecting different systems through APIs and messaging technologies, monitoring application performance, resolving complex technical issues, and helping the wider development team follow software engineering best practices. What you’ll be doing: Developing and maintaining payment systems and platform servicesBuilding microservices, middleware applications, orchestrators, and automated testsIntegrating systems through APIs and messaging technologiesProviding technical guidance and promoting software engineering best practicesOverseeing application monitoring and supporting production implementationsProviding third-line support for complex application issuesImproving application performance

observability, and resilienceWorking proactively within an agile development environment What we’re looking for: At least five years of software development experience using JavaExperience with Spring Boot and microservicesExperience with messaging systems-ideally Kafka and another technology such as RabbitMQ or IBM MQExperience integrating APIs using REST and GraphQLKnowledge of relational and non-relational databasesExperience developing systems using agile methodologiesStrong analytical and logical reasoning skillsA proactive approach and the ability to learn quicklyA completed bachelor’s degree in systems engineering, computer engineering, mathematics, physics, economics, business administration, or a related discipline Desirable experience: Knowledge of UK or international payment standards, including ISO 20022, SWIFT, and MX messagingExperience with Docker and KubernetesKnowledge of AWS or another cloud platformExperience with performance-testing tools such as Gatling or JMeterFamiliarity with Jira and ConfluenceDevOps and continuous-integration experience using tools such as Gradle, GitHub Actions, and Sonar VASS is an Equal Opportunity Employer. We celebrate diversity and are committed to creating an inclusive environment for all employees. Employment decisions are based on qualifications, merit, and business needs, without regard to race, religion, colour, sex, gender identity, sexual orientation, age, national origin, marital status, or disability status. Join us in shaping the future of digital transformation.

Company Overview: Imagine working alongside over 4,000 talented individuals driven by a shared passion for excellence and innovation. We’re not just a company; we are a dynamic ecosystem of companies, including VASS, NATEEVO, Serbatic, vdSHOP, T4S, Comunytek, ECENTA, and CRI group. Our collective strength and the E4 Agile Method empower us to assist large enterprises in their digital transformation journey, executing ground-breaking projects from strategy to operation. Global Impact, Local Commitment: At VASS we are not just a business; we are committed to society. In 2019, we established the VASS Foundation to champion research and training in the digital talent space. We proudly allocate 2% of our profits and encourage our entire team to dedicate 1% of their time to impactful solidarity actions. It is not just about growing the bottom line; it’s about growing together, hand in hand with the community we serve. About the role: We are seeking an experienced Senior Java Software Engineer