Senior Java Developer

Location : Madrid, Spain (3 days / week onsite in city center)

Eligibility : EU Citizens or Candidates with a Valid European Work Visa

About the Role :

UST is seeking a Senior Software Engineer with strong expertise in Java and Cloud-native platforms. As a Senior Software Engineer, you will take technical ownership of critical systems and influence architectural decisions across multiple teams. In our agile, DevOps-centric environment, you will lead the full lifecycle of high-impact services—shaping design, delivery, and operations—while mentoring engineering leads and promoting best practices at scale.

Key Responsibilities :

• Technical Strategy & Architecture : Define and evolve architecture for large-scale, microservices-based systems. Lead cross-team design reviews to ensure alignment with performance, security, and scalability goals.
• DevOps & Delivery : Architect and optimize CI / CD pipelines for complex workflows. Promote observability, resilience, and infrastructure as code across deployments.
• Feature Delivery & Stakeholder Engagement : Own major feature delivery, collaborating with Product, UX, and Operations. Act as a technical liaison, translating strategic goals into actionable roadmaps.
• Quality & Standards : Establish and enforce coding standards, testing (TDD / BDD), and performance benchmarks. Introduce new tools and processes to enhance productivity and code quality.
• Mentorship & Organizational Growth : Mentor engineers, guide architectural and technical decisions, and foster a culture of continuous learning through activities like brown-bag sessions and hackathons.

Mandatory Requirements :

What We Offer :

Inclusion & Diversity :

We promote equal opportunities and welcome applications from all backgrounds. We are especially committed to hiring individuals with a disability certificate as part of our inclusion initiatives.

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