Skip to main content
01 / Founder

Sergio ValentínFaúndez Velasco

Software architect. Hands-on technical leader.

Enterprise AI · Robotics · .NET platforms

Eighteen-plus years building mission-critical enterprise software: native desktop applications, robotics control systems, AI/ML platforms, private RAG systems and containerized web platforms. Founder of Fëanor's Code — focused on private enterprise AI, on-prem LLM deployment, autonomous agents and industrial-grade software delivery.

02 / By the numbers
  1. 18+
    years

    enterprise engineering and architecture

  2. AI · Robotics
    domains

    private RAG, computer vision, ROS2, inspection systems

  3. .NET depth
    stack

    C#, WPF/MVVM, Blazor, REST APIs, microservices

03 / How I work

Production systems, not demos.

I build software the way I'd want it built if it ran my own business: tested, observable and reproducible from day one. Demos are easy. What I deliver has to hold up Monday at 3 a.m. — that's the bar.

I work senior-end-to-end. Whoever designs the system also writes the code that ships it. No proxies, no handoffs to juniors, no architecture documents that drift away from the codebase. Architecture and implementation live in the same head.

Fëanor's Code exists for companies that need data sovereignty and senior execution — typically because their data is regulated, sensitive or strategically valuable. Cloud LLM providers are off the table; the work has to run on their infrastructure, with auditable behavior.

04 / Core technical strengths

Three disciplines, one engineering bar.

Every block below maps to systems I've shipped to production — not just experimented with.

01

AI · ML · RAG

Private RAG systems, on-prem LLM deployment, autonomous agents and the document-understanding pipelines that feed them. The discipline that cannot send data to cloud LLM providers — and the engineering that makes that constraint work in production.

  • Private RAG
  • On-prem LLM
  • Agent Framework
  • TensorFlow
  • OpenCV
  • FAISS
  • Qdrant
  • Model quantization
02

Custom application development

Custom software for web, desktop and cloud — from containerized full-stack platforms to native WPF/MVVM desktop applications. Enterprise architecture, observability and CI/CD baked in from the first sprint.

  • C#
  • .NET 10
  • WPF
  • MVVM
  • Blazor
  • REST APIs
  • Microservices
  • Docker
  • Kubernetes
  • PostgreSQL
  • RabbitMQ
  • AWS
  • Azure
03

Robotics · Systems

Robot control, real-time telemetry, hardware integration, 3D simulation and industrial inspection in production environments. Where performance and reliability are non-negotiable.

  • ROS2
  • C++
  • Linux/Yocto
  • FastDDS
  • Robot control
  • Telemetry
  • 3D simulation
  • Computer vision
05 / Selected experience

Eighteen years. A handful of formative chapters.

The full timeline lives in the PDF — what follows is the curated version that explains how I got here.

  1. Current venture
    Alicante, Spain

    Fëanor's Code S.L.

    Founder & Software Architect

    Founded an enterprise AI and software-engineering studio for companies that need data sovereignty, senior-level execution and production systems — not demos. Shipped TENGWAR, a private on-prem RAG platform that ingests internal documents and returns cited answers without sending data to cloud LLM providers.

    • .NET 10
    • Blazor
    • MudBlazor
    • Agent Framework
    • Qwen / GLM / M2M
    • PostgreSQL
    • MinIO
    • Qdrant
    • RabbitMQ
    • Docling
    • NVIDIA DGX Spark
  2. Feb 2021 — Present
    Houston, US

    ARIX Technologies

    Lead Application Software Developer (Remote)

    Built Mission Control — the WPF desktop application that drives custom pipe-inspection robots and processes their telemetry. Backend reporting service that turns raw inspection data into client-ready PDF reports. Contributed to the firmware migration from custom C to Variscite SOM hardware running ROS2 on Debian/Yocto.

    • .NET 9
    • C#
    • WPF MVVM
    • Telerik
    • VisioForge
    • RabbitMQ
    • AWS
    • OpenXML
    • C++
    • ROS2
    • Linux/Yocto
  3. Sep 2025 — May 2026
    Valencia & Brussels

    UNOPS

    Senior Software Developer (Remote)

    Modernized an internal project-management system from ASP.NET legacy to React and .NET Core, working alongside the in-house team.

    • .NET Core 10
    • C#
    • React
    • DevExtreme
  4. Dec 2019 — Jun 2021
    Alicante, Spain

    EUIPO via Intrasoft

    Technical Lead (.NET) · Data Science Dev Support Lead

    Technical lead for contractor .NET projects and dev-support lead for the EUIPO Data Science team. Delivered the Image Search Engine that flags conflicting figurative trademarks, the Vienna Codes Suggester (image classifier), and the SpeechToText gateway integrating Azure ML Speech with .srt outputs.

    • React
    • TypeScript
    • Python
    • FastAPI
    • TensorFlow
    • OpenCV
    • FAISS
    • .NET Core 3.1
    • Azure Event Grid
    • Cosmos DB
    • Kubernetes
  5. Aug 2018 — Nov 2019
    Switzerland & Spain

    Hexagon Metrology

    Senior Software Developer · UI Team Lead (Remote)

    Led UI implementation on BlueFire — a desktop platform for modelling, simulating and executing robotic inspection cells with 3D visualization and multi-vendor robot program generation. Integrated HOOPS 3D and containerized simulation/control microservices.

    • .NET 4.7
    • .NET Core 3.1
    • C#
    • WPF MVVM
    • Prism
    • HOOPS
    • RabbitMQ
    • ZeroMQ
    • Docker
    • Kubernetes
    • CUDA
  6. Aug 2012 — Oct 2017
    Alicante, Spain

    EUIPO via Altia

    Senior Software Developer

    Maintained and evolved the Document Access System (DAS) — the proprietary examiner-facing document management system providing access to 80M+ documents. .NET/WPF desktop client integrated with a JEE/Spring backend vault over REST.

    • .NET 4.5
    • C#
    • WPF MVVM
    • Spring .NET
    • Entity Framework
    • REST
    • NUnit
    • TestStack White
    • Sonar

Earlier roles at CareWorks (Dublin), Cesser and Grupo Ibergest (2008 – 2017) are listed in the PDF.

06 / Education & languages

Where the foundations came from.

Education & certifications

  1. Dec 2016 — May 2017
    Deep Learning Foundation Nanodegree
    Udacity

    CNNs, RNNs, LSTMs, GRUs, GANs · ~200 hours

  2. 2015
    Expert in Design and Creation of Video Games with Unity 3D
    University of Alicante

    Unity 3D, 3D Studio Max, game design, art direction, final project

  3. 2012 — 2014
    Microsoft Professional Certifications (MCPD · MCTS)
    Microsoft

    Web Developer 4, Windows Developer 4, Silverlight Developer 4, .NET Framework 4, WCF

  4. 2007
    Network and Communications Training
    SERVEF

    Local Area Network Administration · Satellite Communication Systems

Languages

  • SpanishNative
  • EnglishC2
  • CatalanC2 / C1
  • FrenchB1 / A2 / A1
07 / Take it with you

Want this as a PDF?

Download the canonical CV — same content, formatted for ATS systems and printing. Use the contact button if it's easier to just talk.

Download CV (PDF)

PDF in English · ~100 KB Replies within 24 hours.