Lukáš Henderson
CZEN
Contact

Build your app

Vývoj aplikace na zakázku

From first commit to the App Store — and kept running after launch.

Build my app

At a glance

Fixed-scope build
8–16 weeks
Architect or fractional CTO
Monthly, 2–3 days a week
Platform rewrite or rescue
Starts with a 2-week audit
Run it after launch
Monthly

Web, iOS, Android, admin and backend as one system, with tests, CI and deploys from day one. I own it end to end: from the brief through design and development to long-term support.

Who it is for

Founders with a validated idea, companies replacing spreadsheets or legacy software, and product teams that need a senior architect for a new build or a rewrite.

What you get

An app in production with end-to-end tests, a preview URL for every branch, monitoring and a runbook. Your team runs it, or I keep running it.

Formats

  • Fixed-scope build

    8–16 weeks

    A written spec, milestones with a demo each week, and launch.

  • Architect or fractional CTO

    Monthly, 2–3 days a week

    Architecture, reviews and hiring help next to your team.

  • Platform rewrite or rescue

    Starts with a 2-week audit

    A plan you can hold me to before any code moves.

  • Run it after launch

    Monthly

    Hosting on Deployik, monitoring, updates and backups.

How it runs

  1. Call

    Thirty minutes on what you are building and why.

  2. Proposal

    A written scope, a timeline and a fixed quote.

  3. Build

    Weekly demos on a preview URL; you see every change before it ships.

  4. Handover

    Your repositories, your infrastructure, a runbook — or I keep it running.

Proof

FixIt

fixit.app

Co-founder and CTO

Like Wolt, but for home services — AI diagnosis, vetted pros and BankID-signed contracts.

Backend
89 API modules
Platforms
iOS, Android, web and admin
First line of code
5 May 2025
Prague launch
1 Aug 2026

Reservine

reservine.io

Co-founder and frontend architect

Booking, payments and smart locks — a venue that runs 24/7 with no staff.

Door access
A time-boxed PIN for every booking
Embeds
A booking widget for React, Vue, Svelte and Angular
In development since
2023

Vitrinka

vitrinka.ai

Author, operated by LEFTEQ

One tunnel for your whole dev team: a tester circles a bug and writes one sentence, an agent fixes it and posts the after-shot.

Findings answered
148 from 37 sessions, across 3 PRs
Tester time
3.9 h
First commit to v5.10
About 12 weeks

Prices on request: tell me the scope and I will send a fixed quote.