You will get Full Stack Developer | Web Developer | SaaS MVP Build
Project details
Building a SaaS product and need it live fast without cutting corners on architecture? As a Full Stack Developer and Web Developer, I build SaaS MVPs designed to scale past launch.
What you get:
• Full-Stack Development: frontend, backend, and database wired together
• Software Development: clean, documented code you can hand to any team
• Stripe API: subscription billing and payment flows built in
• OAuth: secure login and user authentication from day one
• Supabase: fast backend setup for auth, storage, and real-time data
Done = a working SaaS MVP with billing, auth, and core features live.
Recent: launched a SaaS MVP with Stripe billing in under 4 weeks.
Full Stack Developer · Web Developer · Mobile App Developer · SaaS · Stripe API · full-stack development
What's the core feature your SaaS can't launch without?
What you get:
• Full-Stack Development: frontend, backend, and database wired together
• Software Development: clean, documented code you can hand to any team
• Stripe API: subscription billing and payment flows built in
• OAuth: secure login and user authentication from day one
• Supabase: fast backend setup for auth, storage, and real-time data
Done = a working SaaS MVP with billing, auth, and core features live.
Recent: launched a SaaS MVP with Stripe billing in under 4 weeks.
Full Stack Developer · Web Developer · Mobile App Developer · SaaS · Stripe API · full-stack development
What's the core feature your SaaS can't launch without?
Programming Languages
Python, ASP.NET, C#Coding Expertise
Cross Browser & Device Compatibility, Performance Optimization, DesignWhat's included
| Service Tiers |
Starter
$280
|
Standard
$700
|
Advanced
$1,400
|
|---|---|---|---|
| Delivery Time | 10 days | 15 days | 20 days |
Number of Revisions | 1 | 2 | 3 |
Design Customization | - | - | - |
Content Upload | - | - | - |
Responsive Design | - | - | - |
Source Code | - | - | - |
Frequently asked questions
About Valentine
Full Stack Developer | Mobile App Developer | Web Developer | PM BM
Rancho Cucamonga, United States - 1:16 am local time
🔥 ACHIEVEMENTS
✔️ 8+ years, 60+ shipped products as a Full Stack Developer, Mobile App Developer, and Web Developer across SaaS, e-commerce, and marketplaces.
✔️ $2.4M+ in client revenue impact and 98% Job Success Score as a Full Stack Developer on Upwork.
✔️ 25,000+ active users across web and mobile apps built as a Mobile App Developer, with engagement up 30%.
✔️ 40+ responsive, SEO-friendly builds as a Web Developer, cutting load times 55% and lifting organic traffic 3x.
✔️ 15+ apps published to App Store/Google Play as a Mobile App Developer, including 3 senior mobile app developer engagements for enterprise clients.
✔️ 20+ React Native/Flutter builds as a full-stack web developer and react developer, with crash rates below 0.5%.
✔️ 10+ WordPress/WooCommerce projects as a wordpress developer, boosting conversions up to 45%.
✔️ 12+ blockchain integrations as a blockchain developer, covering wallets, smart contracts, NFT marketplaces.
🚚 WHERE I DELIVER
As a Full Stack Developer, I own projects end-to-end - Database Architecture and Software Architecture & Design first, then React, Node.js, JavaScript, PHP, Python, Java, Laravel, Angular. Whether you need a python full stack developer, a wordpress full stack build, or a full stack developer react solution, I execute without handoff friction. Clients hiring a full stack developer, fullstack web developer, or senior fullstack developer get one accountable engineer - full-stack development, done right. I've also shipped a .net full stack module for legacy finance reporting - "full stake developer" searches (javascript fullstack included) land here.
As a Mobile App Developer, I cover the full mobile app development lifecycle: mobile app design, mobile ui ux designer collaboration, mobile application developer builds in React Native and Flutter, plus mobile app marketing hooks like push notifications. I've worked as a flutter developer on booking apps, a senior mobile app developer on healthcare platforms, and a mobile game developer on a puzzle title with 100k+ downloads. Every release goes through a mobile app tester pass, and I've helped founders using a mobile app builder migrate to custom code.
As a Web Developer, I build fast, conversion-focused sites: website developer work on Webflow (webflow developer), Shopify (shopify web developer), and WordPress (wordpress developer) stacks, plus react web developer builds for SaaS dashboards. My web design and web designer background means every site looks as good as it performs - clean HTML, CSS, Bootstrap, Web Application architecture underneath. I'm comfortable as a front end developer polishing UI or a react developer wiring state with react native for shared mobile logic.
📊 RESULTS THAT SPEAK
🔶 Healthcare SaaS (Full Stack Developer, React + Node.js): +30% staff efficiency, 10,000+ users, HIPAA-compliant Database Architecture.
🔶 E-commerce Marketplace (Web Developer, Laravel + PHP): +45% conversion, Core Web Vitals 90+/100, full stack developer react components.
🔶 Fitness Mobile App (Mobile App Developer, React Native + Flutter): 50,000+ downloads, 4.8★ rating, +35% retention.
🔶 Logistics Web App (Full Stack Developer, Python + Java): 90% faster order processing, 2.7x operational capacity.
🔶 Real Estate Website (Web Developer, WordPress + Webflow): +200% organic traffic, launched in 3 weeks.
⚙️ TECH STACK
Frontend: React, Angular, JavaScript, HTML, CSS, Bootstrap. Backend: Node.js, PHP, Python, Java, Laravel, API, API Integration. Mobile: React Native, Flutter. CMS/Platforms: WordPress, Webflow, Shopify. Practices: Agile Software Development, Software Architecture & Design, Software Development, Database Architecture, Git.
💼 EVERY PROJECT INCLUDES
▪️ Clean code following Agile Software Development practices
▪️ Direct communication with a senior Full Stack Developer - no agency layers
▪️ Post-launch support for every Mobile App Developer and Web Developer engagement
▪️ API Integration and Database Architecture built for scale
🏭 INDUSTRIES
SaaS · E-commerce · Healthcare · Fintech · Real Estate · Logistics · EdTech · Web3
🚀 LOOKING FOR A FULL STACK DEVELOPER, MOBILE APP DEVELOPER, OR WEB DEVELOPER?
👉 Send project details - I'll reply within hours with a free technical assessment. Full Stack Developer to own the whole build, Mobile App Developer to ship on iOS/Android, or Web Developer to launch a site that converts. Ready to start.
⭐️⭐️⭐️⭐️⭐️ "One of the best full stack developers we've worked with - reliable, fast, and genuinely cares about the product."
Important note: I'm not a developer myself - I help teams find the right projects, working alongside a business manager and a project manager to deliver them.
📅 Last updated: 08/21/2026
Steps for completing your project
After purchasing the project, send requirements so Valentine can start the project.
Delivery time starts when Valentine receives requirements from you.
Valentine works on your project following the steps below.
Revisions may occur after the delivery date.
Discovery & SaaS Analysis
feature scope and priorities set.
Full Stack Developer Build
frontend, backend, and database build.