About us
We make business software people like using.
Birrejan is a small software company for small businesses. We design and build custom software and AI that fit the way your team already works, and we teach teams to use AI safely.
Why we exist
A third option.
Small businesses usually get two choices. Off-the-shelf software built for thousands of companies, so your team bends to fit it. Or an agency project that takes months, passes through several hands and ends with an invoice nobody expected.
Birrejan is the third option: one senior engineer who designs and builds exactly what you need, in weeks, at a price agreed in writing. Software that's quick to learn, fast to use and pleasant to open every morning.
What we believe
Good software is quiet.
It does the job and gets out of the way. If your team needs a manual, we designed it wrong.
Small beats big.
The smallest tool that solves the problem, live in weeks, beats a platform that's ready next year.
AI assists, people decide.
AI reads, sorts and drafts. A person approves anything that reaches a customer or your books.
You own what you pay for.
Your code, your accounts, your data. No lock-in and no licence per seat.
The founder
Founded by Jan Gimenez Layola.
Jan is a senior software engineer with 7 years of building production software: first at Nakima, a Barcelona agency, then at SaaS companies and on an AI platform. He has led product teams, automated release pipelines and contributed to Home Assistant, one of the largest open-source projects.
He started Birrejan to bring that experience to small businesses, and he leads every project himself. Originally from Barcelona, based in the Netherlands.
Before Birrejan
Recommendations for Jan from CTOs and colleagues he worked with
“Jan is a key driver within the YieldComputer team, bringing strong initiative, thoughtful decision-making, and a calm, professional leadership style. He combines strategic thinking with solid technical skills and a rare ability to truly listen and align people around the right direction.”
“He consistently delivered high-quality work under pressure and combined solid technical execution with excellent communication and team alignment.”
“Jan combines technical reliability with clear written communication, professionalism, and the courage to give honest feedback.”
home-assistant.io · 2025
Credited in the 2025.10 release notes
Synced zoom across history charts, one of the release's noteworthy changes.
GitHub · 2025–26
Seven merged pull requests to the Home Assistant frontend
Reviewed by maintainers of one of the largest open-source interfaces.
Cisco · 2024
Cybersecurity Foundations
Privacy and data confidentiality: the part of AI training most teams skip.
The company
The details.
Everything you'd want to check before you sign. The full details are in the legal notice.
- Trade name
- Birrejan
- Legal form
- Eenmanszaak (sole proprietorship), owned by Jan Gimenez Layola
- Chamber of Commerce (KvK)
- 42206299
- VAT number
- NL005583152B33
- Registered in
- Roosendaal, Netherlands
- We work in
- English, Spanish and Catalan, remotely across Europe