Services · frontzen.com
App development & MVP
Custom web applications and product MVPs — full stack, from architecture design through development to deployment and long-term operations.
- React / TypeScript frontend
- APIs & backend (Node.js, Hono, Go)
- MVP in weeks, not months
- Scalable architecture
From idea to a product you can click through
I build web applications and digital products full stack — frontend, backend, infrastructure, and deployment. I co-founded motion.page and led engineering there. Since then I have been the lead platform engineer on a multi-supplier ticketing platform, and the top committer across its frontend organisation: a custom React SSR engine on Cloudflare Workers serving 45 locales for several partner brands, the edge router that compiles 23,000+ redirects into the bundle, the B2B partner dashboard, and the multi-tenant white-label system. I know what a product that has to survive production traffic looks like.
You work with the engineer who writes the code. On larger builds I bring in a second developer I’ve shipped with before, and I stay on the project as the lead — the architecture, the reviews and the client relationship stay with me.
What I typically build
- Product MVPs — the smallest meaningful version that lets you validate demand. Fast, but on an architecture that can carry further growth. From $20,000.
- Custom web applications — customer portals, order systems, configurators, SaaS products.
- Rescues and inherited codebases — adding features to an existing app, technical audits, refactoring, stabilization.
- Payments and checkout — Stripe from the first API key to a complete payment flow: Stripe Connect and payouts for marketplaces, ACH and bank transfers via Plaid, webhooks, recurring billing and subscriptions, refunds, chargeback handling, reconciliation — architected to keep card data out of your PCI DSS scope.
How I build
I design for growth: typed code (TypeScript), tests where they earn their keep, and Cloudflare infrastructure with minimal running costs. The code is written so another team could take it over — no dependency on me.
How the engagement works
Fixed price against a written scope, billed across milestones tied to working demos. Intellectual property assigns to you on final payment and the code lives in your repository from day one. Delivered scope carries a 30-day bug-fix warranty.
When it makes sense
- You have a product idea and want to validate it with an MVP
- You need a customer portal, ordering system, or configurator
- An existing application needs rescue or extension
How this works
- 01
Discovery workshop
Goals, users, constraints. Together we carve the smallest version that validates demand out of the big vision.
- 02
Architecture & plan
Technical design, milestones, risks. You know what lands when.
- 03
Iterative build
A working demo you can click through every few weeks. Not slide decks about progress.
- 04
Beta & testing
Real users, real data, error monitoring. Tuning before production.
- 05
Operations & scale
Production deployment, monitoring, further development — with me or your team.
What you get
- Application running in production
- Source code in your repository — IP assigns on final payment
- CI/CD pipeline and deployments
- Technical documentation
- Monitoring and error tracking
- Handover with no vendor lock-in
FAQ
What is an MVP and why start with one?
An MVP (minimum viable product) is the first working version of a product with just the core value — no extra features. You validate the idea with real users before investing in full development. I built the MVP for Rendero.ai, among others.
What technologies do you use?
TypeScript and React on the frontend, Node.js with Hono or Go on the backend, PostgreSQL for data, Cloudflare Workers for infrastructure. I choose per project — the goal is an application another team could take over.
Can you take over an existing application?
Yes. I run a technical audit, fix the riskiest parts first, and agree on a plan for further development. You don't have to start from scratch.
How much does a web application cost?
Web applications and MVPs start at $20,000. You get a fixed price against a written scope, billed across milestones, so you always know what the next payment buys.
How long does an MVP take?
Typically six weeks to a few months depending on scope. The proposal includes a timeline with milestones and a working demo at each one.