Little steps.Whole new worlds.
Lingo Luna01
Big adventures for little language learners. Playful, offline courses in English, Spanish, and German, with privacy built in.
Find it on the App StoreIndependent thinking. Tangible outcomes.
Based in Germany · Working everywhere
Good ideas.
Built into
real things.
AI that earns its place. Software that makes life a little better. From the first question to the thing you actually use.
Explore the work
Curiosity, made concrete.Strategy meets a builder’s mindset.AI consulting / Product development / Independent apps
01 / Selected work
Ideas out
in the world.
A few things we’re building.
Each one starts with a real need.
Little steps.Whole new worlds.
A little closerto home.
Your Apple Home. Right in your menu bar.Home Actions02
Your home, within reach. Lights, rooms, and favorite scenes in a native Mac companion that stays right in the menu bar.
Ask about Home Actions
Build AGI.Try not to end it.
AI Lab Race03
Run a tiny AI lab in pixel art. Start in a garage, race three parody rivals to AGI, and keep P(doom) under 100%.
Visit the gameThe thinking behind the building
The Long
Commit.
Commit.
Writing / Engineering / AISome things deserve
Some things deserve
a longer conversation.
Weekly essays on engineering, AI, and the judgment that matters over a whole career. Notes from more than 20 years of building and leading.
Read The Long Commit02 / How I can help
Less guesswork.
More forward.
Practical help for teams with
something worth building.
01AI consulting
Find where AI is useful in your business, test the idea, and work out what it takes to make it dependable.
- Use-case discovery & prioritization
- Prototypes & feasibility
- AI workflows & integrations
02Product & software development
Turn a promising idea into a product people can use. Hands-on help with scope, architecture, implementation, and the details that make it feel right.
- Product discovery & technical direction
- Web applications & internal tools
- Prototyping through to delivery
03Technical advisory
A builder’s perspective on the decisions in front of you. Work through trade-offs, review an approach, or get an independent view before committing.
- Architecture & code reviews
- Engineering practice & team workflows
- Technology choices & trade-offs
Juan Cruz MartinezBuilder. Writer. Human.
03 / A company with a person behind it
Hi, I’m Juan.
I like making
things work.
GoTo LCS is my independent software company, based in Germany. It’s where I bring together consulting, the apps I build, and a curiosity about what technology can make possible.
I’ve spent more than 20 years building software, working with teams, and figuring things out. I still like getting my hands into the work. You’ll work directly with me.
Have something in mind?
Let’s make
it happen.
A new product. An AI question.
A better way of doing things.