Senior Java Engineer – Distributed Systems & Microservices | Remote in Spain

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.

We are seeking a Senior Java Developer with strong software engineering expertise and a Dev Ops 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.

• 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" Dev Ops 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.

• 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.

• 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, Dev Ops, 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.

• 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…