Consulting · Development · Training · AI
Give me one week. Consider it done.
Thirty years making software work.
30+ years in IT, 10+ of them building scalable backend systems. Expert in modernizing legacy applications, building high-performance APIs, and leading technical transformations. Specialized in Ruby on Rails, Python, and cloud-native architectures.
PlebisHub Rails 4.2 → 8.1
passing specs 12,400+
HFL on PyPI 29 releases
Technologies I work with every day
- Ruby on Rails
- Ruby
- Python
- Go
- PostgreSQL
- MySQL
- Redis
- Docker
- Kubernetes
- GitHub Actions
- Git
- Linux
- FastAPI
- Hugging Face
- Ollama
- JavaScript
What I do
Four ways I can help
Each one has its own site, so you only see what matters to you.
-
01
Consulting
Legacy system modernization without stopping the business.
- A first week of diagnosis and fixes
- Rails, Python and dependency upgrades
- Part-time technical leadership
-
02
Development
Backends, APIs and integrations built to last.
- Ruby on Rails, Python and Go
- Single sign-on with SAML, SCIM and OAuth
- Tests from day one
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03
Training
Courses and mentoring on what I apply every day.
- Modern Rails and testing with RSpec
- Modernizing legacy without breaking it
- On site or remote
-
04
Applied AI
Models on your infrastructure and connectors to your systems.
- Your data never leaves your network
- OpenAI, Ollama and Anthropic compatible APIs
- MCP connectors with authentication
Would you rather get to know me first? Here are my CV and my projects.
Prompting is easy. Production is not.
An AI demo takes an afternoon. Making it work in production, with tests, security, deployment and someone to maintain it, is a different craft.
That craft is mine: software that keeps running, since 1992.
Career
Leading systems and teams since 1996
- 1996–1999 Head of the IT Department Inner Research/Synovate
- 1999–2000 Programmer Analyst Gestoría Calvo Canga
- 2000–2001 Technical and Functional Analyst Cezanne Software
- 2001–2003 Director of IT and Data Processing Departments INRA/ECO IPSOS
- 2003–2005 Freelance
- 2005–2006 Programmer Analyst Norma 4
- 2006–2012 IT Department Director G.T.I.S.A
- 2012–2015 Independent Consultant Freelance
- 2015–2021 Senior Developer - State Development Dept. Podemos
- 2021–2022 Backend Tech Lead Kasaz
- 2022–2023 DevOps Engineer Ambiser
- 2023–2025 Senior Backend Developer (Ruby on Rails) Ifeel
- 2025 → today Senior Backend Developer Freelance
Give me one week.
Consider it done.
Give me one week and I’ll give you a solution: a diagnosis, the most urgent issues fixed and a clear plan for everything else.
No fixed quotes in the dark: first we see it working.
About me
Gabriel Galán Pelayo
Senior Backend Developer & Technical Leader
30+ years in IT, 10+ of them building scalable backend systems. Expert in modernizing legacy applications, building high-performance APIs, and leading technical transformations. Specialized in Ruby on Rails, Python, and cloud-native architectures.
- Madrid · on site or remote
- Spanish native · English for international teams
Contact
Let's talk.
Tell me what you need and I'll show you how I would solve it.