Fullstack Developer

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 on digital technology services, and we provide large-scale technologic solutions to big companies.

What we look for?

A Fullstack Engineer with a strong expertise in React and Java or .NET Core to design, develop, and maintain frontend and backend components.

Work Location

Hybrid. Madrid city center (Sol area). 3 days a week in the office + 2 days remote.

Main Tasks And Accountabilities Will Be

• Design, develop, and maintain frontend components using React, aligned with enterprise UI standards.
• Implement user interfaces that integrate seamlessly with backend services built in Java (Spring Boot) or .NET Core.
• Consume RESTful APIs and ensure correct data handling, error states, and performance.
• Design, develop, and maintain backend services in a distributed, service‑oriented architecture.
• Write and maintain unit and integration tests across frontend and backend components.
• Collaborate closely with backend developers, QA engineers, DevOps, and product stakeholders.
• Participate actively in refinement, planning, development, and delivery activities.
• Ensure code quality, maintainability, and alignment with architectural standards.
• Support applications running in production, including analysis of frontend and backend issues.
• Contribute to continuous improvement of development practices, tooling, and technical solutions.

• Proven experience as a Full‑Stack Developer in enterprise environments.
• Strong hands‑on experience with React for frontend development.
• Solid experience integrating frontend applications with RESTful APIs.
• Proven experience with backend development using Java and Spring Boot or .NET Core / ASP.NET Core.
• Experience working with relational databases and SQL (Oracle, SQL Server, or equivalent).
• Familiarity with JavaScript / TypeScript and modern frontend practices.
• Experience with version control systems (Git).
• Understanding of Agile ways of working (Scrum / Kanban).
• Basic understanding of CI/CD concepts and DevOps environments.
• Awareness of production and operational aspects of applications.
• Strong problem‑solving skills and ownership mindset.
• Comfortable working in complex, regulated enterprise environments.
• Good communication skills and fluency in English.

• 23 days of Annual Leave plus the 24th and 31st of December as discretionary days!
• Numerous benefits (Heath Care Plan, Internet Connectivity, Life and Accident Insurances).
• `Retribución Flexible´ Program: (Meals, Kinder Garden, Transport, online English lessons, Heath Care Plan…)
• Free access to several training platforms
• Professional stability and career plans
• UST also, compensates referrals from which you could benefit when you refer professionals.
• The option to pick between 12 or 14 payments along the year.
• Real Work Life Balance measures (flexibility, WFH or remote work policy, compacted hours during summertime…)
• UST Club Platform discounts and gym Access discounts

In 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, so we are interested in hiring people with disability certificate.

Skills

reactjs,spring boot,asp.net,sql,