◆NEW BUILD
You have an idea and no codebase.
- Scope and architecture agreed in writing before a line of code
- iOS, Android and Web from a single Flutter codebase
- Shipped to both stores under your own developer accounts
Hector Waldman · Independent maker, Apps 369I build and ship production apps end to end.One codebase — iOS, Android, Web.
Flutter architecture, the backend behind it, the cloud it runs on, and the AI inside it. Six years shipping cross-platform products to real users — including my own, live on both stores.
Available for freelance, contract & full-time — Europe, overlapping US & LATAM hours
6
years shipping production apps
2
apps live on the App Store & Google Play
3
platforms from one codebase
<24h
first reply to any enquiry
Experience
Six years of shipped work.
2024 — 2026
Flutter Architect & Senior Frontend Developer
Keel Mind
Architecture and design system for a mental-health platform: state management, module boundaries, release pipeline and the front-end team's conventions.
2023 — 2026
Founder & Engineer
Apps 369 · Foodly
Built and shipped Foodly alone — Flutter clients, Laravel API, PostgreSQL, cloud infrastructure, store releases and support.
2020 — 2024
Full-Stack & Mobile Engineer
GuardianAI · agencies · contract work
Cross-platform apps, backends and AI features for products across the US, Europe and LATAM.
Stack
What I work with every day.
Mobile & Flutter
- Flutter · Dart
- BLoC · Riverpod
- Clean Architecture
- Design systems
- iOS & Play releases
Backend & Data
- Laravel · PHP
- PostgreSQL
- Node.js · TypeScript
- REST · WebSockets
- Redis · queues
AI & Cloud
- Voice AI · NLP
- AWS Bedrock
- GCP Cloud Run
- Firebase
- CI/CD pipelines
Practice
- Written scope & estimates
- Two-week demos
- Code review
- Automated testing
- Documented handover
The person
One engineer, accountable for the whole thing.
I am a senior Flutter architect and full-stack engineer based in Europe. I work in Spanish, English and Portuguese, and I have spent the last six years doing the unglamorous parts of shipping software: store rejections, migrations, release pipelines, and the call where you explain why something slipped.
I use AI heavily in my own workflow — for review, scaffolding and research — and I ship AI features inside products. It makes me faster. It does not make the architecture decisions.
"You will never receive an invoice you didn't see coming."
Flagship product
Foodly
My own product, designed, built and shipped alone: a platform where restaurants publish digital menus, take bookings and run promotions, and where diners discover them nearby. Live on the App Store and Google Play.
Flutter · iOS, Android & WebLaravel + PostgreSQLLive on both stores
Work with me
Three ways I usually start.
↻TAKEOVER
You have an app and no one to own it.
- A written audit of what you actually have, before you commit
- Releases unblocked, store rejections resolved, builds reproducible
- Ongoing maintenance, or a clean handover to your next team
▤WEB & LANDING
You need a site, a landing page or something small.
- A fixed price from 700 € and a date, agreed before I start
- Fast, responsive and indexable by Google from day one
- Live on your own domain and hosting, in one or two weeks
Hiring for a full-time or contract role?Download CV→
How a project runs
Four steps. No surprises.
01
Scope
A call, then a written scope with what is in, what is out and what it costs.
1 week02
Architecture
Data model, state management, environments and CI decided before the build.
1 week03
Build
Two-week slices. You get a working build and a demo at the end of each one.
4–10 weeks04
Ship & keep
Store submission under your accounts, then maintenance or a clean handover.
ongoingServices
What I take on.
01→02→03→04→05→06→07→
Websites, landing pages and small sites
A fast, indexable site or landing page live on your domain in one or two weeks.
Build a new app end to end
From an idea to a product in both stores, backend and cloud included.
Take over an existing app
Audit, stabilise and keep shipping a codebase someone else started.
Maintenance and ongoing support
A monthly plan: SDK and store-policy updates, crash fixes and small changes.
Architecture & technical review
A second opinion in writing on structure, state, testing and delivery.
Security and data-protection review
Authentication, roles, dependencies and secrets, GDPR and store privacy requirements.
AI features inside your product
Voice agents, speech pipelines and LLM features that ship, not demos.
Contact
Tell me what you have in mind.
First reply in under 24 hours, always from me. No forms that go nowhere.