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# Software Engineer C# .Net - Fintech

- **Company:** Client Server
- **Location:** Madrid, Spain
- **Salary:** €120,000
- **Contract:** Permanent contract
- **Skills:** Clean Code Principles, Java (Programming Language), C Sharp (Programming Language), C++ (Programming Language), Data Structures, Software Design Patterns, Distributed Systems, Python (Programming Language), Microsoft Servers, Object-Oriented Software Development, Software Construction, Software Engineering, Information Technology
- **Published:** November 9, 2026
- **Apply:** https://www.jobleads.com/es/job/software-engineer-c-net-fintech--madrid--e55f1cf82769a0ca282c69db9f895637f

## About the Role

* You have studied at a top 10 university in Spain (or top 200 globally) and have achieved 9.0 and above in Bachillerato and 7.0 and above in University - Computer Science or Mathematics preferred
 * You're a technologist who enjoys collaborating and problem solving, working on complex, distributed systems
 * You have expertise with modern C# .Net (will also consider other OO languages e.g. Java, C++, Python but you must be happy to use C# going forward)
 * You have a strong knowledge of modern software engineering best practices and have experience across the full software development lifecycle
 * You have a thorough understanding of Computer Science fundamentals such as OOP, Data Structures, Design Patterns, Algorithms
 * You're excited to join a start-up in a role that you can shape and influence
 * You have fluent English language skills

## Description

Software Engineer / Developer Madrid onsite to €120,000

Are you a back end focused Software Engineer with a strong academic background, looking to take the next step in your career? This is an opportunity to work on complex, high-impact systems at a growing FinTech scale-up with solid financial backing, a major Hedge Fund partnership, and ambitious plans for expansion.

What's in it for you:

As a Software Engineer / Developer you will earn a competitive package:

 * Salary to €120,000
 * Bonus
 * 25 days holiday
 * Social team atmosphere with a range of events

Your role:

As a Senior Software Engineer you will collaborate with a small, talented team to deliver the core platform within a Microsoft environment using the latest versions of C# .Net to produce high quality code. You'll take ownership of technical projects, working across the full development lifecycle to understand business needs.

The company has ambitious growth plans, this is a great opportunity to be involved from the ground up and progress your career.

Location:

You'll be based in Madrid on a fulltime basis (Monday to Friday).

About you:

 * You have studied at a top 10 university in Spain (or top 200 globally) and have achieved 9.0 and above in Bachillerato and 7.0 and above in University - Computer Science or Mathematics preferred
 * You're a technologist who enjoys collaborating and problem solving, working on complex, distributed systems
 * You have expertise with modern C# .Net (will also consider other OO languages e.g. Java, C++, Python but you must be happy to use C# going forward)
 * You have a strong knowledge of modern software engineering best practices and have experience across the full software development lifecycle
 * You have a thorough understanding of Computer Science fundamentals such as OOP, Data Structures, Design Patterns, Algorithms
 * You're excited to join a start-up in a role that you can shape and influence
 * You have fluent English language skills