Senior Backend Developer .NET

Signaturit Group; Valencia; On-site; EUR 40,000 - 70,000; Full time

Benefits offered by this job

Flexible working hours

Access to specialized training platforms

Birthday day off

Job summary

A leading digital transactions company in Valencia seeks a Senior Backend Developer .NET to design and implement reliable backend services. Candidates should have over 4 years of experience with .NET and a strong understanding of Clean Code principles. The position offers flexible working hours and opportunities for technical training.

Qualifications

• 4+ years of experience building backend applications using .NET / .NET Framework.
• Deep understanding of Clean Code and SOLID principles.
• Strong background in automated testing (unit, integration, contract testing).

Responsibilities

• Design and implement backend services using .NET.
• Contribute to architectural decisions and discussions.
• Write and maintain automated tests for code correctness.

Skills

Backend application development in .NET

Clean Code principles

Automated testing

Git and CI/CD

Agile methodologies

Problem-solving mindset

Tools

Docker

AWS

Job description

Join to apply for the Senior Backend Developer .NET role at Signaturit Group

Signaturit Group is the European champion of complete and secure digital transactions. Thanks to a modular platform, we automate transactional processes, from identity verification and KYC to electronic signature and legal archiving. More than 100 thousand customers rely on our solutions to accelerate their business activities, while optimizing their operations.

As a certified Trusted Service Provider, we control over 35 million documents and carry out more than 180 million signatures a year, guaranteeing security, compliance and legal value.

Today, more than 400 experts and passionate professionals, based in Paris, Barcelona and Valencia, are working every day towards our shared success.

What you will do at Signaturit

• Design and implement backend services: Build reliable, modular, and testable backend logic using .NET and modern architectural patterns.
• Contribute to architectural decisions: Be part of the conversations that shape how our systems evolve — from domain modeling to tech stack choices.
• Write and maintain automated tests: Ensure code correctness and system stability through thoughtful unit, integration, and contract tests.
• Collaborate across disciplines: Work closely with other colleagues of other teams
• Review code and share feedback. Participate actively in code reviews to maintain high standards and foster team growth.
• Explore and learn continuously: Investigate new tools, libraries, and practices, and bring ideas to the table to improve how we build software.
• Handle production with care: Help monitor, debug, and continuously improve our services in real-world environments.

What skills will make you successful?

• Must-have: 4+ years of experience building backend applications using .NET / .NET Framework
• Deep understanding of Clean Code, SOLID principles, and Hexagonal Architecture
• Strong background in automated testing (unit, integration, contract testing)
• Familiarity with Git, CI/CD pipelines, and agile development methodologies
• Pragmatic mindset: solving real-world problems.
• Willingness and curiosity to explore other programming languages when needed
• Nice-to-have: Experience with languages like Python, C++, and familiarity with cloud environments (especially AWS), Docker, and container orchestration

Why Join Us

• Flexible working hours
• Access to specialized technical training platforms
• Celebrate your birthday with a day off

Be part of Signaturit Group's journey to revolutionize digital transactions across Europe and beyond. We are excited to welcome fresh talent who are eager to make a meaningful impact in the digital world.

We are an equal opportunities employer and welcome applications from all qualified candidates.