I turn ideas into real products.
Designed and built by me, from first idea to working reality.
Open to a full time or founding role, client work and partnerships.
Claude
ChatGPTGPT Image
Nano Banana 2
Codex
Lovable
Next.js
React
Vercel
Supabase
GitHub
Xcode
Three.js
Figma
Shopify
Bambu Lab
UnityProducts I've taken from idea to launch
Live and shipped
8
Web appLiveNewOffices
A search-first marketplace for premium office space in Spain: 449 listings across 10 cities, counted from the data on every load, zero commission, straight to the owner.
Modelled the listing data in Supabase, made search the hero
Web appLiveQuizMaster
A quiz generator that hands you a finished, print-ready quiz in minutes: 1400+ questions, 15 question types, and a QR code that reveals the answers.
Wrote the question bank, print PDF layout, and QR answer key
AI appLiveJobbkompassen
An AI job search that matches your real experience to live roles, explains why each one fits, and drafts tailored applications you can back up. Proof, not bluff.
Match explanations and writing rules that keep applications truthful
AI appLiveFyndpuls
An AI radar for second-hand deals: it values any item from what it has really sold for, then flags the listings priced well below.
Wrote the value-check rules and AI prompts that price each listing
Web appLiveEarth Now Live
A cinematic 3D globe you spin to drop into live views of streets, coasts and city nights happening right now.
Built the 3D globe and the drop-in from planet to street
GameLiveGhost Games
A neon take on the word game Ghost, played in Swedish against a Swedish dictionary: add a letter, never finish the word, and outlast the AI or your friends.
Tuned the Ghost round, built AI opponents, styled it neon
AI appLiveAIsvenskan
An AI tool that finds real betting value in Allsvenskan football: value plays with clear reasoning, and the discipline to sit out when there is no edge.
Defined what makes a bet good, designed the best plays view
GameLiveShadow City
A gritty, text-based mafia browser game in Swedish, with an open season running: eight districts, jobs from petty to serious, businesses for passive income, and the itch that someone out there is earning more than you.
Designed the core loop, the economy and the gothic mood
Early and in progress
3
Web appPrototypeWedding Flow Studio
A studio-grade wedding planner with a 3D venue preview: walk your ceremony, seat your guests, and see the whole day before it happens.
Guest list wired into a visual seating editor, calm premium styling
PrintPrototypeNissen Flyttar In
A free, printable library of Swedish 'nisse' magic: letters, door signs, advent doors and decor on A4, plus a personalised-letter maker.
Designed the A4 printables and the nightly find and print routine
E-commerceIn progressAnkans Stickverk
A warm e-commerce brand for handmade, made-to-order knitwear: you describe the piece, Ankan knits it, and every one is unique.
Designed the brand voice, warm storefront and made-to-order enquiry flow
Physical products
2
Board gamePrintedYrkesproffset
A physical quiz card game about Sweden's professions: 120 jobs, 360 questions, 6 categories, with every card illustration generated using AI.
Wrote 360 questions, designed the cards, box and print files
HardwarePrototypeSeeking a co-builderGyroSpinner
A self-developed mechanical product concept: a fidget spinner with an internal gyroscope, taken from idea to 3D-printed physical prototypes.
CAD modelled with real tolerances, reprinted after each fit test
What I can do, proven by the work
Build & ship, solo
Idea to a live product on my own: design it, build with Lovable and Codex, wire the data, deploy, iterate. No team required.
AI & prompt engineering
Prompt chains that classify, value and generate, with answer-checking and a human in the loop so the output is always usable.
Rigour and detail
I work in a structured way, with clear specs, tested flows and the small details handled, so what goes live holds up in real use.
Range across mediums
Not just web apps: a printed board game, a 3D-printed hardware concept and an e-commerce brand, each built end to end.
From idea to finished product
I start from the problem, not the technology. From there I build the simplest honest version early, so you see a real product instead of a document, then refine it from there. AI lets me work quickly without cutting corners on the details.
I am open to a full time role, client work, and partners on a few upcoming projects. Working with me is calm and direct, honest about what AI does well and clear about what it cannot, with a result you can stand behind. If it is a good fit, I would like to hear about it.
Tell me what you are building, and I will tell you honestly how I can help.
Get in touchProblem before tools
I understand what actually needs solving before deciding what to build or which tools fit.
Something real early
You see something you can click early, and I adjust it from real use, not guesswork.
Clear the whole way
You always know where things stand, what is done, and what comes next.
Say hello, whatever brought you here.
Maybe you are hiring, maybe you have a project in mind, or maybe you just have an idea you want to test. All three are genuinely welcome. Write a line or two, and I will read it properly.
- Hiring a builder. A full-time role, a spot on your team, or a founding seat.
- Working together. A project, some freelance help, or a longer partnership.
- Just an idea. Even a rough idea is fine. Tell me and get an honest read back.
No newsletter, no sales sequence. Just a real reply from the person who would build it.
Or write directly to johan.ruben.larsson@hotmail.com