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# Senior/Lead.Net Developer

- **Company:** Ascendion
- **Location:** Toledo, Spain
- **Contract:** Permanent contract
- **Skills:** ASP.NET, .NET Framework, Application Programming Interfaces (APIs), Amazon Web Services, Automation of Tests, System Configuration, Continuous Delivery, Continuous Integration, Middleware, NoSQL, Nunit, RabbitMQ, SignalR, SQL Databases, Systems Architecture, Multithreading, .NET Core, Git, Moq, Containerization, Asynchronous Programming, Teamcity, Restful APIs, Cucumber (Software), Software Version Control, TIBCO (Software), Docker, Web Api, Microservices
- **Published:** October 11, 2026
- **Apply:** https://www.buscojobs.com.es/senior-lead-net-developer-en-toledo-ID-374351509

## 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.
Nice to have Skills: Fixed Income product knowledge Experience configuring continuous integration and continuous delivery tools.
Experience using AWS platform.
#J-*****-Ljbffr

## 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.Nice to have Skills: Fixed Income product knowledge Experience configuring continuous integration and continuous delivery tools.Experience using AWS platform.#J-*****-Ljbffr