2025 — Present
CTO
Hexad Spain SL · Barcelona
Leading technology strategy, innovation and high-performing teams to drive business growth and digital transformation.
Barcelona · Available for ambitious problems
FERNANDO RUEDA
01 — Profile
I build the systems that build the business. Fifteen years across banking, mobility and enterprise software — now leading technology strategy and engineering teams, and shipping sovereign AI platforms where the intelligence goes to the data, never the other way around.
Sharing knowledge — the part of the job I enjoy most
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Years shipping software
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Years at Hexad
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Connectors on the AI platform I help build
Currently
CTO & AI Engineer at Hexad Spain — designing agentic AI systems, RAG pipelines and MCP integrations, running local LLMs on constrained hardware, and putting human approval gates where decisions carry weight.
02 — Experience
The road so far
2025 — Present
AI Engineer
Hexad Spain SL · Barcelona
Agentic systems with local & API LLMs: tool calling, MCP integrations, RAG and long-term memory. vLLM / Ollama tuning on constrained GPUs, with guardrails, observability and budget-aware controls.
2017 — 2025
Solutions Architect
Hexad · Digital:Lab Volkswagen, Berlin
Real-time vehicle-tracking platform end to end — from a Linux FPGA device transmitting telemetry to processing, analysis and display. TDD and pair programming in a multidisciplinary product team.
2015 — 2017
J2EE Developer
Profile Software Services
Solutions architecture in an agile centre: home-insurance platforms, a polling-station finder for the Spanish general election, city-council job boards and a microservices foundation for the product line.
2014 — 2015
Programmer Analyst
Indra Software Labs · Lleida
Architecture team: electronic-invoice management for public administrations, Facturae 3.2 signing, document custody with Alfresco, distribution to FACe and the AOC hub.
2011 — 2014
J2EE Developer
Tecnocom · Castellón
Online-banking front end for mobile devices for a major Catalan bank. Mainframe-to-midrange migrations and 24/7 on-call production support.
2009 — 2010
Network Admin & Developer
Grupo Gestimed · Benidorm
Deployed the full Microsoft Exchange infrastructure and a company VPN for secure remote connectivity; internal application maintenance.
The next chapter
could be yours.
03 — Stack
Tools I think in
Highlighted — what I work with day to day
AI & LLMs
- AI Agents
- RAG
- MCP
- vLLM
- Ollama
- Generative AI
- Guardrails
- Prompt Design
- AI Governance
Cloud & Platform
- AWS
- Kubernetes
- Docker
- Helm
- OpenShift
- Cloud Foundry
- Concourse CI
Architecture
- Distributed Systems
- Microservices
- Event-driven
- Spring Cloud
- Netflix OSS
- OAuth 2
Languages, Frameworks & Data
- Go
- Kotlin
- TypeScript
- Java
- Spring Boot
- Node.js
- Angular
- MongoDB
- Oracle
Architecture first
Distributed systems, microservices and event-driven design that survive contact with production.
Data sovereignty
AI that runs under the customer's governance — no data egress, audit ledgers, revocable permissions.
Craft
TDD, pair programming and knowledge sharing — I run internal workshops, from Unix & shell scripting to microservices.
04 — Proof of work
Credentials & code
Certification · AWS
AWS Certified Solutions Architect — Associate
Certification · Udemy
Deep Learning A-Z: Neural Networks, AI & ChatGPT
Badge · HackerRank
Gold Badge — Problem Solving
Education · 2021 — 2022
Postgraduate Degree — Quantum Engineering
Education · 2006 — 2010
Ingeniero Técnico en Informática de Sistemas
Open source · Kotlin
Collaborative TODO List
Open source · Kotlin
WebFlux Comparison
Workshop · URV
Docker Workshop
Workshop · Java