Senior Java Developer (Kafka) - Remote en Spain, España

We are still looking for the very Top Talent…and we would be delighted if you were to join our team!

More in details, UST is a multinational company based in North America, certified as a Top Employer and Great Place to Work company with over 35,000 employees all over the world and presence in more than 35 countries. We are leaders in digital technology services, providing large-scale technological solutions to leading global organizations.

What we look for?

We are currently looking for a Senior Developer (Java & Kafka) to join an exciting international project within a highly collaborative Agile environment.

A passionate and experienced software engineer with strong expertise in Java microservices architectures and Apache Kafka, eager to contribute to high-impact projects while working with modern technologies and best development practices.

⚙ Key Responsibilities:

• Design, develop, and maintain scalable microservices-based applications.
• Develop and optimize event-driven architectures using Apache Kafka.
• Apply software design principles and best practices to ensure high-quality solutions.
• Implement and maintain applications using Java 8+ and Spring Boot.
• Participate in code reviews, testing strategies, and continuous improvement initiatives.
• Collaborate closely with cross-functional Agile teams.
• Contribute to software architecture decisions and technical designs.
• Participate in the team's rotational 24/7 on-call support schedule (approximately one week every 3-4 months).

Mandatory Requirements:

• Minimum 4 years of experience in a similar role.
• Minimum 4 years of professional experience working with Apache Kafka .

Strong experience with:

• Java 8+
• Spring Boot
• Spring Framework
• Microservices architecture
• Functional Programming
• JPA
• Software Design
• Testing methodologies (TDD and/or BDD)

Experience with relational and NoSQL databases such as:

• PostgreSQL
• Oracle
• MongoDB
• Knowledge of Agile methodologies, especially Scrum.
• English level B2 or higher .
• Availability to participate in a rotational 24/7 on-call support schedule .

Nice to Have:

• Knowledge of Reactive Programming.
• Experience with API design and specification standards (OAS3/OpenAPI).
• Additional technical skills or experience that can bring value to the project.
• Experience working in complex enterprise environments.

What can we offer?

• ✈️ 23 days of Annual Leave plus the 24th and 31st of December as discretionary days!
• ❤️ Numerous benefits (Health Care Plan, Internet Connectivity, Life and Accident Insurances).
• Flexible Compensation Program (Meals, Kindergarten, Transport, Online English Lessons, Health Care Plan, and more).
• Free access to several training platforms.
• Professional stability and career development plans.
• Referral Program with attractive rewards for successful referrals.
• The option to choose between 12 or 14 salary payments per year.
• Real Work-Life Balance measures (flexibility, remote work options, summer hours, and more).
• UST Club Platform discounts and gym access discounts.

If you would like to know more, do not hesitate to apply and we'll get in touch to provide all the details. UST is waiting for you!

At UST, we are committed to equal opportunities in our selection processes and do not discriminate based on race, gender, disability, age, religion, sexual orientation, or nationality. We have a special commitment to Disability & Inclusion and actively encourage applications from candidates with disability certificates