Senior .NET Engineer

Product Pulse; Barcelona; Hybrid; EUR 70,000 - 100,000; Full time

Job summary

Product Pulse is seeking a backend-focused engineer to own a core, isolated .NET system in production. You will maintain and extend a legacy codebase built on .NET Framework 4.8 while improving reliability, performance and tooling.

You will collaborate with other engineering teams, diagnose complex production issues and make pragmatic decisions balancing risk with business needs. Fluency in Spanish and English is required for this role and its regulatory constraints.

Qualifications

• 5+ years building and maintaining production systems with .NET.
• Strong expertise in .NET Framework and Windows-based services.
• Relational databases and transactional systems experience.
• Ability to work autonomously on business critical systems.
• Fluent English and Spanish language skills.

Responsibilities

• Own a core, isolated .NET system in production.
• Maintain, extend, and stabilize an existing codebase.
• Improve reliability, performance and correctness.
• Diagnose and resolve complex production issues.
• Collaborate with other engineering teams.
• Make pragmatic decisions balancing risk and business needs.
• Improve internal structure and tooling where possible.

Skills

.NET Framework experience

.NET Core not primary

Autonomous work

Debugging & problem solving

Team collaboration

Tools

Docker

AWS/GCP

PostgreSQL

Windows services

Job description

You will take ownership of a core backend system that is critical to the company and our customers. This system operates independently from our main platform and supports key business workflows under strict client and regulatory constraints.

While the platform is constrained by customer requirements, there is room to improve internal structure, reliability, and tooling over time.

Your responsibilities:

• Technical ownership of a core, isolated .NET system used in production.
• Maintain, extend, and stabilize an existing codebase built on .NET Framework 4.8.
• Ensure reliability, performance and correctness.
• Diagnose and resolve complex production issues.
• Collaboration with other engineering teams.
• Make pragmatic decisions balancing risk, maintainability, and business needs.
• Improve code quality and internal structure where possible.

What we are looking for:

• 5 years plus experience building and maintaining production systems with .NET.
• Strong experience with .NET Framework (not only .NET Core / .NET 6+).
• Solid understanding of relational databases and transactional systems.
• Ability to work with legacy or constrained systems.
• Experience owning systems that are business critical.
• Methodical approach to debugging and problem solving.
• Comfortable working autonomously with high ownership.
• Advanced level Spanish and English.

Tech Stack:

Language & Platform: C#, .NET Framework 4.8

Data: PostgreSQL or similar relational databases

Infrastructure: Windows-based services, Docker where applicable, and cloud infrastructure on AWS or GCP.

Location:

Barcelona, Spain > along with a hybrid working model