Senior Java Engineer - Distributed System

We are 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 company with over 35,000 employees all over the world and presence in more than 30 countries. We are leaders in digital technology services, and we provide large-scale technological solutions to big companies.

What are we looking for? We are seeking a Senior Java Developer with strong software engineering expertise and a DevOps mindset to build and maintain efficient, scalable, and reliable software solutions. The ideal candidate enjoys creating robust APIs, distributed systems, and best-practice frameworks that enable teams to deliver high-quality applications. You’ll work on a global customer project in the financial services sector—a leading provider of credit cards, auto loans, banking, and savings accounts.

Position 100% remote for candidates based in Spain.

On-call support: Paid 24/7 on-call rotation. One week on-call every 5-6 weeks with compensation for on-call hours.

What we’re looking for Essential

• Strong Java programming skills with deep knowledge of building production-grade APIs and distributed systems.

• Solid understanding of all stages in the Software Development Life Cycle (SDLC) and ability to contribute across the full lifecycle.

• Deep understanding of design patterns and principles (e.g., SOLID principles, microservices patterns).

• Experience with multiple testing types: Unit Testing, API Testing, Acceptance Testing, and Load Testing.

• Experience with distributed architectures such as SOA (Service-Oriented Architecture) or MSA (Microservices Architecture).

• Experience designing and implementing event-driven architectures and REST APIs.

• Strong grasp of the “build it, own it, run it” DevOps model—you take responsibility for design, deployment, and maintenance of your solutions.

• Experience with build tools like Gradle or Maven and Enterprise Jenkins for CI/CD.

• Proven ability to work effectively both independently and as part of a team in an Agile environment (e.g., Scrum, SAFe).

• Comfortable operating independently in a fast-moving program and contributing from day one.

• Good engineering practices as second nature: API design, automated testing, observability, documentation, and secure-by-default delivery.

Nice to have

• Relevant experience with AWS services and AWS certifications.

• Experience working in highly regulated environments, particularly banking and financial services.

• Experience with Docker and containerization.

• Experience with serverless technologies (AWS Lambda, AWS Fargate).

• Familiarity with Test-Driven Development (TDD) and Behavior-Driven Development (BDD) practices.

• Experience building and maintaining internal developer platforms or tools.

What you’ll be like

• A hands-on engineer with a builder’s mindset, happy close to the code and shipping practical capability.

• Passionate about software quality, performance, and responsiveness of applications.

• Opinionated about good application development, and able to turn that judgement into patterns others can follow.

• Pragmatic and self-sufficient, able to make progress where priorities shift and drive solutions end-to-end.

• Security- and automation-conscious. You build quality and controls in, rather than relying on manual processes.

• Collaborative across development, architecture, DevOps, and product stakeholders.

• Innovative within your team and technical domain—you contribute ideas and drive improvement initiatives.

• Comfortable working in a highly regulated financial services environment with compliance and quality requirements.

What can we offer?

• 23 days of Annual Leave plus the 24th and 31st of December as discretionary days!

• Numerous benefits (Health Care Plan, teleworking compensation, Life and Accident Insurances).

• Flexible Compensation Program: (Meals, Childcare Support, Public Transport, Professional Development, Health Care Plan options…)

• Free access to premium training platforms and continuous learning opportunities.

• Professional stability, career development, and clear advancement paths.

• Competitive referral bonus program – share your network and benefit!

• Choice between flexible payment schedules (12 or 14 payments per year).

• Genuine Work-Life Balance initiatives (flexibility, 100% remote work policy, compressed schedules during summer…)

• Access to exclusive UST Club Platform discounts and gym access discounts.

• Opportunities to work on cutting-edge banking and financial technology solutions.

• Collaborative, inclusive culture with a global perspective.

Ready to make an impact? If you would like to know more about this exciting opportunity with UST, don’t hesitate to apply and we’ll get in touch to discuss the role in detail. We are waiting for you!