Senior Full-Stack Java Engineer – Spring Boot, Microservices & React

Job Description

• Design, develop and maintain Spring Boot microservices and libraries
• Work on technical solutions around logging, security, messaging and integration
• Build reliable distributed systems using Kafka, MQs and event-driven architecture
• Apply integration and architecture patterns such as the Inbox/Outbox pattern
• Support frontend development with React and TypeScript when needed
• Collaborate closely with business analysts, product owners and other engineering teams
• Apply Java design patterns and best practices to ensure scalable and maintainable code
• Analyse complex technical problems and develop efficient, innovative solutions
• Work with Oracle databases, including schema design, query optimisation and backend integration
• Contribute to observability, logging and monitoring of backend services

About The Customer For a long-term project in the Swiss financial services sector, we are looking for an experienced Senior Full-Stack Java Engineer with a strong backend focus. This is a 12-month contract with the possibility of extension, starting immediately or by arrangement.

In this role, you will work on robust, scalable backend systems using Java, Spring Boot and microservices . You will also contribute to frontend development with React and TypeScript when required.

Requirements

• Expert-level experience in Java development
• Strong hands-on experience with Spring Boot and ideally Spring Security
• Solid experience with microservices, Maven and distributed systems
• Good understanding of multithreading, concurrency and performance optimisation
• Practical knowledge of Java design patterns and clean software architecture
• Experience with messaging systems such as Kafka, IBM MQ, RabbitMQ or similar MQ technologies
• Familiarity with event-driven architecture and integration patterns
• Experience with Oracle, SQL and query optimisation
• Knowledge of React, TypeScript or other modern frontend technologies is a plus
• Experience with Docker, Kubernetes and Helm is a plus
• Familiarity with CI/CD tools such as GitLab, Jenkins or Azure DevOps
• Experience with observability tools such as Prometheus, Grafana or Loki is an advantage
• Understanding of trunk-based development and backward-compatible software design is beneficial
• Knowledge of authentication protocols such as LDAP, OIDC or Kerberos is a plus
• Fluency in English, both written and spoken
• Independent, analytical and responsible way of working

Compensation Benefits

• Long-term project opportunity in the Swiss financial services sector
• Modern Java/Spring Boot-based microservices environment
• Backend-focused engineering role with an additional full-stack component
• Collaboration with experienced engineering, business and product teams
• Challenging technical tasks around scalability, integration and system reliability
• Contracting setup through an external payroll partner
• Start: immediately or by arrangement
• Duration: 12 months with possibility of extension