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Validate your idea in 8 weeks

Product engineer with 10+ years of experience. Full code ownership. Modern tech. Ship your MVP fast.

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MS KL RP +

10+ MVPs delivered

8 weeks
delivery time
€6,000
starting price
MVP SAAS ● Live
Balance
Sent
3
milestones shipped
Received
€4,340
+€740 this sprint
Revenue — 30 days +12.4%
Mon Tue Wed Thu Fri Sat Today
DS
User Auth & Onboarding
Week 1-2
Complete
BL
AI Insights Engine
Week 3-5
In progress
PD
Stripe Billing
Week 5-6
Next
Technologies I build with
0+
MVPs delivered
+12 this year
0+
Years experience
Senior-level expertise
0 weeks
Average delivery
Fixed timeline, no surprises
0%
Code ownership
You own everything
What you get

Everything your MVP needs

From concept to launch in 8 weeks. Clean code, modern tech, full ownership.

Rapid MVP Delivery

Ship in 8 weeks, not 8 months. Clear timeline, fixed scope, no surprises. Weekly progress updates so you're never in the dark.

8 weeks Fixed scope Weekly updates

Modern Tech Stack

React, Next.js, Flutter, TypeScript, Appwrite. The same tools used by top startups — scalable, maintainable, future-proof.

React Next.js Flutter TypeScript

Full Code Ownership

You own 100% of the code. No lock-in, no licensing fees. Clean, documented, production-ready — delivered to you after launch.

Your code No lock-in Fully documented

Product Engineering

Not just coding. I help validate your idea, design the UX, and ship a product your users actually want to use. Senior-level execution, end-to-end.

UX Design Idea validation End-to-end
Timeline
Discovery
2 weeks
Week 1-2
Development
5 weeks
Week 3-7
W1
Discovery & Architecture
Requirements, UX, tech stack
Done
W3
Core Features MVP
User auth, dashboard, core flow
In progress
W8
Launch & Handoff
Deploy, docs, support
Pending
Frontend
React/Next.js
Web apps
Backend
Appwrite
Open source BaaS
Volume trend — 8 weeks
Web apps 65%
Mobile apps 25%
Full-stack 10%
Source code
100%
Git repo access
Documentation
Full
Setup guides included
GC
Git Repository
Full history, clean commits
Included
DC
Documentation
Setup, API, architecture
Included
DB
Deploy Ready
Vercel, Netlify, AWS
Included
UX Research
Included
Rapid Prototyping
Included
Quality Code
Included
Direct Accountability
Direct contact
How it works

From idea to launch

A proven process refined over 10+ years of building products. Clear milestones, weekly updates, no black boxes.

Portfolio overview
Live data
8 weeks
Week 1-2: Discovery & Architecture
Mon Tue Wed Thu Fri Sat Today
Discovery & Design
Week 1-2
Requirements, UX wireframes, tech decisions
Requirements
40%
UX Design
35%
Architecture
25%
Build & Ship
Week 3-8
Sprint-based development, weekly demos
Development
60%
Testing
25%
Deploy & Docs
15%
Simple pricing

Transparent, fixed price

No surprises. No hidden fees. One clear price for your entire MVP.

Discovery Sprint
€500
Applied as a credit if you move forward
  • 3-day intensive workshop
  • Understand your product end-to-end
  • Detailed scope & requirements
  • UX wireframes for core flows
  • Tech stack recommendations
  • Credited 100% toward MVP Package
Book a sprint
Most popular
MVP Package
€6,000
 
  • Delivered in 8 weeks
  • Web or mobile app
  • Full source code ownership
  • Appwrite backend (or custom)
  • Clean, documented code
  • 2 weeks post-launch support
  • Deploy to production
Start your MVP
Custom Project
Custom
for larger scope
  • Everything in MVP Package
  • Web + mobile (both platforms)
  • Advanced features
  • Longer timeline
  • Ongoing maintenance available
Get in touch
Quality guarantee

Code you'll actually want to keep

Every project is built to production standards. Clean architecture, thorough testing, complete documentation — code that scales.

Book a discovery call
Clean Architecture
Well-structured, maintainable code that's easy to onboard other developers to
Every project
Test Coverage
Unit and integration tests as standard. Your code works — and keeps working.
Standard
Full Documentation
Setup guides, architecture decisions, API reference. You can run this without me.
Always included
Post-Launch Support
2 weeks of bug fixes included after delivery. Ongoing maintenance available.
2 weeks free
What founders say

Trusted by builders

"Mario delivered our MVP in exactly 8 weeks. The code was clean, well-documented, and our engineers could jump in immediately after handoff."

SC
Sarah Chen
Founder at Relay

"Finally found a developer who understands product, not just code. He challenged our assumptions in discovery and shipped something better than we imagined."

JO
James Okonkwo
CEO at Kora

"We interviewed 10 developers. Mario was the only one who asked about our users first, tech second. That alone told me he was the right choice."

ER
Elena Rodriguez
Co-founder at Loop

"The full code ownership was a game-changer. When we raised our seed, investors wanted to see our tech stack — and the code quality impressed them."

DP
David Park
CTO at Meridian

"Other agencies gave us timelines of 4-6 months. Mario shipped our MVP in 8 weeks at a fraction of the cost. No brainer."

AP
Aisha Patel
Founder at Stash

"I've worked with agencies and in-house teams. This was the smoothest project I've ever run. Weekly updates, clear milestones, delivered exactly on time."

MS
Michael Santos
Product Lead at Vertex
About me

I am Marios Antonoudiou.

Product engineer with 10+ years of experience. Building AI-powered products that feel simple, useful, and ready for real users.

Arrange a call Athens, Greece · No obligations, just an honest conversation.
Marios Antonoudiou
10+ years building products
AI Product Engineer
Got questions?

Frequently asked

What is a Discovery Sprint?
A 3-day paid intensive workshop (€500) where we deeply understand your product, define detailed requirements, and produce UX wireframes for your core flows. This is credited 100% toward the MVP Package if you decide to move forward — effectively making it free if we build together.
What exactly do I get after 8 weeks?
A fully functional MVP ready to ship. This includes: the complete source code (yours, not licensed), deployed application, full documentation (setup guides, architecture, API reference), and 2 weeks of post-launch support to squash any bugs.
What tech stack do you use?
I primarily use React/Next.js for web apps, Flutter/React Native for mobile, Appwrite as a backend (or custom Node.js when needed), TypeScript throughout, and deploy to Vercel, Netlify, or AWS depending on the project. If you have specific requirements, we discuss them during discovery.
Do I really own the code?
100%. No licensing, no lock-in. You get full Git repository access with clean, commit-by-commit history. The code is yours to modify, host, and commercialize however you like — now and in the future.
What if my project needs more than 8 weeks?
We scope honestly during discovery. Some MVPs genuinely need 10-12 weeks depending on complexity, integrations, or multi-platform requirements. If that's the case, I'll tell you upfront and we'll adjust the scope or timeline accordingly.
Can you build both web and mobile?
Yes. I can build a web app, a mobile app, or both as part of a single MVP package. Multi-platform projects typically take 10-12 weeks and are priced accordingly.
How does the process work?
It starts with a free discovery call where we discuss your idea. If we're a good fit, I send a detailed proposal. Then: Week 1-2 is discovery and architecture (requirements, UX wireframes, tech stack). Week 3-7 is sprint-based development with weekly demos. Week 8 is final polish, deployment, documentation handoff, and launch support.
What about after launch?
2 weeks of bug-fix support are included. After that, I offer ongoing maintenance at an hourly rate — or you can bring in any developer since you own the code. Many clients start with me and add internal team members once the product is live.
How do we communicate during the project?
Direct access to me — no project managers, no gatekeepers. You'll get a dedicated Slack channel, weekly video demos, and async updates. You can reach out anytime. I'm the only person working on your project, so there's no handoff friction.