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# Mid/Senior .Net Developer - 100% Remote, Spain

- **Company:** UST España
- **Location:** Cantabria, Spain (Remote available)
- **Contract:** Permanent contract
- **Skills:** ASP.NET, .NET Framework, Multitier Architecture, Automation of Tests, Unit Testing, Continuous Integration, Digital Technology, Distributed Systems, NoSQL, Nunit, Object-Oriented Software Development, Performance Tuning, Systems Development Life Cycle, RabbitMQ, Release Management, Mockito, Secure Coding, Service-Oriented Architecture, SignalR, SQL Databases, Multithreading, .NET Core, Git, Event Driven Architecture, Containerization, Integration Tests, Solid Principles, Asynchronous Programming, Teamcity, Api Design, Restful APIs, Cucumber (Software), Software Version Control, TIBCO (Software), Docker, Web Api, Microservices
- **Published:** September 14, 2026
- **Apply:** https://www.buscojobs.com.es/mid-senior-net-developer-100-remote-spain-en-ribamontan-al-mar-ID-371772625

## About the Role

Advanced English (C1 level mandatory).
Expert-level C# and .NET/.NET Core experience.
Strong understanding of Object-Oriented Design (OOP), SOLID principles and Clean Architecture.
Strong experience designing, building and supporting ASP.NET Core Web APIs and RESTful services in production environments.
Advanced understanding of multithreading, asynchronous programming, performance tuning and distributed systems.
Proven experience with SQL and NoSQL databases, including data modelling, performance considerations and operational support.
Hands-on experience with Docker and containerization technologies.
Strong experience designing and delivering API-based microservices and Service-Oriented Architectures (SOA).
Strong discipline around automated testing: Unit Testing, Integration Testing, BDD, NUnit, Mockito, Cucumber
Extensive experience with messaging and event-driven architectures : RabbitMQ, TIBCO, SignalR
Strong experience with CI/CD practices and source control tools:Git, TeamCity

## Description

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 and Great Place to Work company with over ****** 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?We are looking for a Mid/Senior .Net Developer across the project of the client from the banking sector.Remote 100%, SpainMain tasks and accountabilities will be:Design, build and maintain high-quality .NET software components across the full software delivery lifecycle.Take hands-on ownership of technically complex platform components, ensuring they are robust, maintainable, scalable and well documented.Apply strong engineering judgement to architecture, design, implementation, testing and operational considerations.Work closely with trading, product, architecture, infrastructure and partner technology teams to deliver solutions aligned to business priorities.Contribute to strong engineering practices including automated testing, observability, secure coding, CI/CD and effective release management.What do we expect from you?Advanced English (C1 level mandatory).Expert-level C# and .NET/.NET Core experience.Strong understanding of Object-Oriented Design (OOP), SOLID principles and Clean Architecture.Strong experience designing, building and supporting ASP.NET Core Web APIs and RESTful services in production environments.Advanced understanding of multithreading, asynchronous programming, performance tuning and distributed systems.Proven experience with SQL and NoSQL databases, including data modelling, performance considerations and operational support.Hands-on experience with Docker and containerization technologies.Strong experience designing and delivering API-based microservices and Service-Oriented Architectures (SOA).Strong discipline around automated testing: Unit Testing, Integration Testing, BDD, NUnit, Mockito, CucumberExtensive experience with messaging and event-driven architectures : RabbitMQ, TIBCO, SignalRStrong experience with CI/CD practices and source control tools:Git, TeamCityWhat 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).`Retribución Flexible ? Program: (Meals, Kinder Garden, Transport, online English lessons, Health Care Plan...)Free access to several training platformsProfessional stability and career plansUST 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 discountsIf you would like to know more, don't hesitate to apply and we'll get in touch to fill you in detail. We are waiting for you!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.


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