Senior Fullstack Developers – Test Automation (Stockholm)

About Justera Group Justera Group AB is a leading Swedish IT consulting firm with great experience specializing in building high-performing technology teams and delivering end-to-end IT solutions. Led by dynamic female executives, Justera Group focuses on helping businesses harness the power of digital technologies to continuously evolve in today’s rapidly changing economy. The company has deep expertise in IT consultancy, software development, and recruitment services, providing clients with purpose-driven, well-trained consultants who consistently deliver efficient and effective results. Justera Group manages the entire talent lifecycle, from hiring to ongoing management, ensuring the right fit for each project on time and within budget. With their strong commitment to quality, collaboration, and client success, Justera Group is a trusted partner for technology innovation across Sweden. About the Role: We are looking for Senior Fullstack Developers with strong test automation skills to join a development team working on a modern financial trading platform. You will play a key role in developing and rebuilding solutions for processing external mutual fund orders across multiple Nordic markets. The role combines hands-on software development with a strong focus on automated testing and quality throughout the development lifecycle. You will work with modern technologies including Java 21, Spring Boot, microservices, Microsoft SQL, REST APIs, Kafka and React. Key Responsibilities: Design, develop and maintain scalable backend services, integrations and frontend functionality. Write clean, maintainable and testable code using sound object-oriented design principles and patterns. Develop and maintain automated tests covering functional, regression, integration, API and UI scenarios. Use tools and frameworks such as JUnit, Cucumber and other relevant testing technologies. Validate REST APIs, Kafka-based event flows and database integrity as part of feature development. Contribute to reusable test automation frameworks, test data preparation and reliable test execution within CI/CD pipelines. Perform manual and exploratory testing when automation is not feasible or cost-effective. Analyze test results, troubleshoot defects and work closely with developers, DevOps, Product Management and other stakeholders. Help improve development, testing and delivery processes by identifying opportunities for automation. Contribute to a strong quality culture throughout the software development lifecycle. Requirements: Strong professional experience with Java 21+ and Spring Boot. Experience designing and developing microservices and distributed backend systems. Solid knowledge of REST APIs, Kafka and event-driven architectures. Strong SQL skills and experience with Microsoft SQL or other relational databases. Experience writing unit, integration and acceptance tests using JUnit and Cucumber. Proven ability to design maintainable…