01
Flutter mobile apps
iOS and Android from a single codebase, from a new app to features inside a large existing product. Clean architecture, tests and smooth releases on both stores.
FlutterDartRiverpodBLoC
7+ years building products
THEO AUGUST, Freelance Flutter Developer
Freelance Flutter Developer
Mobile Engineer · Symfony Backend
They trusted me
Why work with me
Seven years building apps, from side projects to platforms used by 8M+ people.
Mobile, web, AI features. The same level of care for two users or two million.
7+
Years building production code
10+
Apps shipped to production
8M+
Users across apps I've shipped
48h
Reply within 2 business days
How I work
What every project gets, whether startup, side project or scale-up.
Mobile apps
Cross-platform apps built with Flutter. One codebase, iOS and Android, fluid UI.
Web platforms
Next.js, Node, Symfony when it fits, architected to scale with the product.
Product thinking
Seven years across side projects and apps at scale. Honest input to support clearer product decisions.
Stack
The tools I use every day
Filter by category. Click or hover any card to see how I use it.
Services
What I do, end to end
Six capabilities, applied with care to your product.
02
Backend & APIs
Symfony and REST or GraphQL APIs built to serve mobile apps at scale, including on sensitive data. Supabase or Firebase when speed matters more than custom infrastructure.
SymfonyPHPGraphQLSupabase
03
Product engineering, end to end
From the first sketch to the store release: scope, design, build, analytics. You stay in control at every step.
DiscoveryArchitectureDeliveryPostHog
04
Web platforms
Next.js apps, back offices and landing pages to go with your mobile product. Deployed on Vercel, fast and measured.
Next.jsTypeScriptVercel
05
AI features with measurable impact
LLM integration, agents, retrieval, evals. Focused on what moves a real metric.
AnthropicOpenAIAI SDKEvals
06
Tech advisory
Stack decisions, architecture and code reviews, audits of an existing app. Honest input, including when not to build.
ArchitectureAuditCode review
Don't see your exact need? Most projects span two or three of these.
Let's talk →
AI Native
Working with AI, every day.
AI is part of my daily workflow: coding agents, language models and automated reviews speed up delivery, without trading away code quality.
Quicker iterations
Spec → prototype → review → ship in days. Clear iteration loops, frequent check-ins.
Extra pair of eyes
AI-assisted refactors and reviews catch what a manual pass might miss.
Read by a human
Every line that ships is reviewed and validated by hand.
ai pair programming
you
My AI toolkit
Coding agents
IDE and terminal
Language models
Built into products
Human review
Every line signed off
Work
Client projects, side projects, community.
Client projects: production-grade delivery. Side projects: testing new ideas. Talks: staying close to the ecosystem.
Live
For myself
One rare word a week, to speak with more precision. Live on iOS and Android.
FlutterRiverpodSupabaseFirebase
Live
For myself
Shareable countdown counters for launches, weddings, deadlines.
Next.jsSupabaseVercelTypeScript
Shipped
For myself
Pay-per-access link generator for creators: pixelated previews, secure payouts.
SymfonyFlutterStripeAWS S3
Testimonials
What they say
I highly recommend Theo for his work and his kindness!
Léo Satgé
CEO, Golden Cup
Theo is always so responsive, with top-notch communication: an urgent development delivered and shipped to production in 48 hours!
Alexis Palmier
CEO, White Heart
Working with Theo was a very rewarding experience, his motivation and creativity are contagious!
Timé Sadiku
Head of HR, Maplr Consulting Inc.
How we work
From the first coffee to production.
A simple, transparent process. You know what happens next at every step.
- 01
Virtual coffee
30 minutes, free. Your product, your constraints, your timeline. We see if there's a fit.
- 02
Scope & proposal
A written proposal within 48 hours: scope, format, planning. No surprises later.
- 03
Build & ship
Weekly iterations and demos, code in your repository from day one, releases handled to the stores.
Engagement formats
Time & materials
Daily rate, embedded in your team for a long mission. Ideal to scale an existing product.
Fixed price
Defined scope, fixed price, milestone billing. Ideal for an MVP or a new app.
Advisory
Audit, architecture review, technical support for founders. A few days, high impact.
Remote-first · Hybrid possible · French & English · Quote within 48 hours after the coffee
FAQ
Before we talk.
Are you available right now?
I'm currently on a long-term mission. I remain open to advisory, audits and short missions, and a virtual coffee is the best way to plan a longer mission ahead.
Which engagement formats do you offer?
Three formats: time and materials (daily rate, embedded in your team), fixed price on a defined scope, and advisory for audits or architecture reviews. We pick the right one together after the first call.
How does billing work?
Monthly invoicing for time and materials, milestone-based for fixed price. If you prefer, we can also contract through Malt.
Will you sign an NDA?
Yes, before we go into the details of your project if needed.
Who owns the code?
You do. The code lives in your repository from day one, and intellectual property is transferred to you.
Do you work remotely?
Yes, remote-first, with hybrid possible depending on the mission. I work in French and English, with overlapping hours defined together.
Contact
First chat within the week.
Currently on a long-term mission, open to advisory, audits and short missions. A free 30-minute virtual coffee is the simplest first step, including to plan a future mission.
On assignment · Open to advisoryVirtual coffee
Free30 minutesAnywhere in the world
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