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# Senior/Lead.Net Developer

- **Company:** Ascendion
- **Location:** Madrid, Spain
- **Contract:** Permanent contract
- **Skills:** ASP.NET, JavaScript (Programming Language), .NET Framework, Application Programming Interfaces (APIs), Agile Methodology, Amazon Web Services, Automation of Tests, Continuous Delivery, Continuous Integration, Middleware, NoSQL, Nunit, RabbitMQ, SignalR, SQL Databases, Systems Architecture, Multithreading, .NET Core, Git, Moq, Single Page Application, Containerization, Asynchronous Programming, Teamcity, Restful APIs, Cucumber (Software), Software Version Control, TIBCO (Software), Docker, Web Api, Microservices
- **Published:** September 16, 2026
- **Apply:** https://www.buscojobs.com.es/senior-lead-net-developer-en-madrid-ID-372112019

## About the Role

· Experience in ASP.NET Core Web API and RESTful API techniques · Solid understanding of and experience with multi-threading and asynchronous programming.
· Familiar with SQL and NoSql databases · Hands-on experience with containerisation solutions like Docker.
· Experience designing and building api based service oriented or microservice architectures.
· Diligent with automated testing i.e. Nunit/Moq/Cucumber etc.
· Strong experience with middleware messaging services like Rabbit MQ, TIBCO, SignalR etc.
· Solid experience with continuous integration and continuous delivery tools like Git, TeamCity etc.
· Agile development/Software life cycle
Nice to have Skills:
· Fixed Income product knowledge · Experience configuring continuous integration and continuous delivery tools.
· An awareness of/understanding of one or more javascript single page application framework.
· Experience using AWS platform.

## Description

As a Senior developer you will be responsible for the ensuring the team deliver high quality software, using industry best practices for code management, testing and CI/CD.This is an exciting opportunity to build a new greenfield solution, working as part of a small team, to help the business improve their electronic trading capabilities within the fixed income space.The platform itself is built on top of AWS and makes use of many services within the AWS ecosystem.Job Responsibilities / Role · Take responsibility for the software delivery by ensuring quality and scope expectations are met.· Contribute and take ownership of the technical design and ensure all aspects of the system architecture are well documented.· Work closely with partner technology teams and to collaborate effectively.Technical Skills Required:· Very deep understanding of .Net/.Net Core and Solid understanding of OO principles.· Experience in ASP.NET Core Web API and RESTful API techniques · Solid understanding of and experience with multi-threading and asynchronous programming.· Familiar with SQL and NoSql databases · Hands-on experience with containerisation solutions like Docker.· Experience designing and building api based service oriented or microservice architectures.· Diligent with automated testing i.e. Nunit/Moq/Cucumber etc.· Strong experience with middleware messaging services like Rabbit MQ, TIBCO, SignalR etc.· Solid experience with continuous integration and continuous delivery tools like Git, TeamCity etc.· Agile development/Software life cycleNice to have Skills:· Fixed Income product knowledge · Experience configuring continuous integration and continuous delivery tools.· An awareness of/understanding of one or more javascript single page application framework.· Experience using AWS platform.


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