> Markdown version of [/jobs/ext/2023687-principal-sw-engineer](https://www.wearedevelopers.com/jobs/ext/2023687-principal-sw-engineer). Every page supports `.md` or `Accept: text/markdown`. Links point to the HTML versions so they work for humans too. Agent guide: [/agents.md](https://www.wearedevelopers.com/agents.md). --- # Principal SW Engineer - **Company:** UST España - **Location:** Spain (Remote available) - **Contract:** Permanent contract - **Skills:** Java (Programming Language), Application Programming Interfaces (APIs), Agile Methodology, Amazon Web Services, Cloud Computing, Continuous Integration, Software Design Patterns, Gradle, Hypertext Transfer Protocols (HTTP), Internetworking, Apache Maven, OAuth, Reliability Engineering, Service-Oriented Architecture, Postman, Spring-boot, Backend, Solid Principles, Kubernetes, Restful APIs, Cucumber (Software), Api Management, Docker, Jenkins, Microservices - **Published:** August 11, 2026 - **Apply:** https://es.trabajo.org/oferta-9000-ceaa1657595b2fbd09af88cf20da5640 ## About the Role requirements:- Production-grade experience of developing and managing APIs using Java & Springboot. Excellent understanding of SOLID principles, SOA, HTTP and REST.- Good knowledge of Maven or Gradle.- Production experience running microservices on container orchestration architectures.- Passionate about API testing utilising tools similar to Wiremock, Pact, Postman and Cucumber.- Good understanding of API authentication and authorisation mechanisms like OAuth.- Knowledge using monitoring & logging tools to troubleshoot problems in a distributed network of systems.- Excellent understanding of infrastructure as code and CI/CD pipeline management via Jenkins.- Development experience within a cloud environment.- Strong experience in back-end architectural and design patterns.- English C1 Nice to have:- Experience working in a highly regulated environment, like banking- Experience with Docker- AWS certification- Experience with TDD and BDD ¿What can we offer?- ️ 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 If you would like to know more, do not hesitate to apply and we'll get in touch to fill you in details. UST is waiting for youIn 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. ## Description You will technically lead a group of engineers responsible for maintaining and improving our back-end services for our most critical customer and/or data applications within the cloud.- Through your team and hands-on engineering, help to shape and deliver the goals and vision set out by your Site Reliability Engineering Manager (SREM).- Contribute to the major optimisation and improvement themes within the team. Identifying opportunities to reduce operational overheads through observability and service automation.- Drive engineering best practice (e.g., Operational Excellence, Security, Quality, Resilience etc.) and set standards across the team and wider SRE community.- Innovate within your team and contribute within your technical domain.- Deliver key pieces of intent from inception through to design and hands-on delivery, in collaboration with your SREM.- Estimate, scope and plan your work within an agile environment.- Be part of a 24/7 on-call rotation (paid additionally). 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