Senior Full Stack Java Engineer

This is us

At Avenga, we believe that human creativity empowers technology that matters. Operating globally, our 6000+ specialists provide a full spectrum of services, including business and tech advisory, enterprise solutions, CX, UX and Ul design, managed services, product development, and software development.

This is the job

You will join an international team working on scalable, high-performance applications for enterprise clients. The project focuses on building robust backend services, integrations, and modern web interfaces in a cloud-based environment, following Agile practices.

We are looking for a Senior Full Stack Developer with a strong backend focus. This role is primarily backend-oriented (approximately 80% backend / 20% frontend) and is ideal for engineers who are proactive, quick to learn, and comfortable taking ownership of complex technical challenges.


This is you

• Strong experience as a Senior Full Stack or Backend Engineer

• Solid expertise in Java and Spring Boot

• Proven experience building and designing REST APIs

• Experience working with NoSQL databases (OpenSearch is a plus)

• Good knowledge of ReactJS or NextJS and modern frontend practices

• Backend-oriented mindset with focus on scalability and performance

• Ability to work independently and proactively in an Agile environment

• English — Upper-Intermediate level

Nice-to-have skills:

• Knowledge or hands-on experience with Identity and Access Management (IAM) concepts

• Experience working with authentication/authorization platforms such as Auth0

• Experience with observability, logging, and performance monitoring tools

This is your role

• Design, develop, and maintain scalable backend services using Java and Spring Boot

• Build and enhance RESTful APIs for high-performance applications

• Work with OpenSearch (or similar NoSQL solutions) to consume and process data

• Contribute to frontend development using ReactJS / NextJS (limited scope, ~20%)

• Collaborate with cross-functional teams to deliver reliable and maintainable solutions

• Take ownership of features end-to-end, ensuring code quality and best practices

• Act as a senior team member: proactively solve problems, support less experienced engineers, and drive technical decisions

What awaits you at Avenga?

At Avenga, everyone matters. We provide equal opportunities in recruitment, career development, and leadership, regardless of race, ethnicity, gender identity, sexual orientation, disability, age, religion, or any other characteristic. We are committed to fostering a work environment where our diverse community of employees, candidates, and business partners actively shapes our growth. By bringing together people from different backgrounds and experiences, we build a workplace where everyone feels free to be themselves while honoring the boundaries of others.