(Product portfolio) 2025—2026 Prague, CZ — --:-- 09 projects / 04 live

Jakub Fidler

I build products. Solo. With AI.

(01) Approach

No clients, no team, no meetings. I build my own products from the first idea to launch — solo, with AI as an extra pair of hands. Short cycles, real users, decisions backed by data. What doesn’t work, I kill. What works, I finish.

— Solo founder
— AI-augmented development
— Own products, not clients

(02) Selected work (09)

The Lab

Every product is its own world. Scroll through them.

01 / 09 Digital legacy Web Live

ARCA

Messages for the people who matter — delivered at the right moment. For loved ones, for your kids’ future, for your older self.

Next.js
TypeScript
Web Crypto
Stripe

02 / 09 EdTech iOS / Android In development

Spello

Write a spell. Change the world. Gamified AI literacy for kids aged 8–13: prompts, games, worlds, Minecraft mods.

Expo
React Native
TypeScript
Claude

03 / 09 LiDAR + AI iOS In development

Nuvoo

Scan your room, let AI design the interior, configure furniture from real brands.

Swift
SwiftUI
ARKit
RoomPlan

04 / 09 Health Web Beta

FIT VII

An autonomous AI fitness and nutrition ecosystem — training, recovery and meals from what’s already in your fridge.

Next.js
TypeScript
Claude
Vercel

05 / 09 Fintech Web (mobile coming) Live

Killsub

Find and kill the subscriptions you forgot about. Tracker, reminders, challenges and a yearly “Wrapped”.

Next.js
TypeScript
TrueLayer
Web Push

06 / 09 Social iOS / Android In development

Metemi

Spontaneous meetups with real people nearby. Launching in Kraków.

Expo
React Native
TypeScript
Supabase

07 / 09 Social Web Beta · waitlist

clipdate

Dating, but safe. Meet through video stories.

Next.js
TypeScript
Supabase
Video

08 / 09 Dev tool Web Live

OptiWeb Studio

Pro-grade image and video optimisation for the web — RAW, PSD, PDF → WebP/AVIF, locally and privately.

React
TypeScript
WebAssembly
WebGPU

09 / 09 Utility Web Live

OmniStream

Universal video and audio downloads in maximum quality.

Next.js
Node.js
yt-dlp
FFmpeg

Full index

All nine products in one table.

To the index ↓

(03) Index

All projects

(04) How I work

From idea to launch

01
Idea

A problem that bugs me, or a market missing something better. I narrow it down to one sentence.
02
Validate

Landing page, waitlist, interviews. Before I write a line of code, I want proof someone cares.
03
Build with AI

AI writes, I own the architecture, design and quality. Weeks instead of months.
04
Launch & iterate

Ship as early as possible. Measure, listen, iterate. Or kill it and move on.

(05) Stack

Next.js
TypeScript
Web Crypto
Stripe
Vercel
Expo
React Native
Claude
Supabase
Swift
SwiftUI
ARKit
RoomPlan
RealityKit
TrueLayer
Web Push
PostGIS
React
WebAssembly
WebGPU
FFmpeg
Node.js
yt-dlp
Docker

(06) Numbers

No embellishment

products in the portfolio: 09
live in production: 04
platforms — Web, iOS, Android: 03
person on the team: 01