Sigfrid Couto Fernández

Sigfrid Couto Fernández

Senior Full-Stack Engineer

France · EU

Stack
C# / .NET · Angular
Experience
15+ years
Engagement
Embedded or independent

Senior full-stack engineer with 15+ years designing and evolving enterprise systems across Europe. Specialised in C# / .NET backend architectures and Angular enterprise frontends within large-scale, high-complexity systems.

Based in France, with project experience across Germany and Spain — frequently on cross-border EU programmes where engineering rigour and distributed collaboration are as critical as technical delivery.

Native Spanish and Catalan; fluent German; professional English and French.

I focus on modernising legacy systems without operational disruption, integrating heterogeneous architectures without creating new debt, and delivering solutions that teams can own and evolve independently.

Stack

Technologies

  • Angular
  • TypeScript
  • RxJS
  • NgRx
  • Angular Material
  • Component architecture
  • State management patterns
  • C# / .NET
  • ASP.NET Core
  • RESTful API design
  • Dependency injection
  • Async patterns
  • Entity Framework
  • SQL Server
  • Complex data models
  • Query optimisation
  • Data migrations
  • Clean architecture
  • Distributed systems
  • System integration
  • Legacy modernisation
  • Monolith-to-modular refactoring
  • Cross-border EU programmes
  • Agile / Scrum
  • CI/CD pipelines
  • Git
  • Docker
  • Azure
Approach

Engineering Principles

The principles that guide my engineering and collaboration approach.

Clear Communication

Engineering decisions, trade-offs, and risks are communicated early and transparently to ensure alignment and trust.

Reliable Delivery

Estimates and commitments are grounded in technical reality and long-term system impact.

Sustainable Systems

Architecture and implementation choices prioritise clarity, maintainability, and controlled complexity.

Long-Term Collaboration

Strong partnerships are built on accountability, consistency, and respect for shared goals.

Experience

Career Highlights

  1. 2023–Present

    Independent

    France

    Enterprise REST APIs · Angular platforms · Financial workflow systems

  2. 2017–2023

    netgo

    Berlin

    Enterprise logistics systems · Legacy modernization

  3. 2012–2017

    GVL

    Berlin

    Rights data platforms · XML integrations

  4. 2010–2012

    Jonas & Redmann

    Berlin

    Industrial automation · Hardware integration

  5. 2008–2010

    CC Vossel

    Berlin

    Production software · Document workflows

  6. 2007–2008

    General Lab (Freelance)

    Barcelona

    Web apps · Healthcare workflows

  7. 2006–2007

    Nextret

    Barcelona

    Enterprise web platforms · Database migrations

Communication

Languages

  • ES
    Español Native
  • CA
    Català Native
  • DE
    Deutsch Working proficiency
  • EN
    English Professional
  • FR
    Français Professional
Education

B.Sc. Computer Science · Universitat Politècnica de Catalunya · Barcelona, 2006

Outside work

Outside work, I run regularly, spend time with my children and family, and follow football as a spectator.

Get in touch

Let’s work together

If you’re working on a modernisation, integration, or long-term delivery initiative, let’s talk.

Based in France  ·  Available for EU remote and on-site engagements