I will full stack developer, saas web app, mern react php base44, ai software developer


Level 1
About this gig
AI Software Developer | Full Stack Web & App Development | Custom AI Chatbots
Are you looking for a skilled Full Stack Web Developer to build a modern, fast, secure, and scalable web application tailored to your business needs? You're in the right place!
I specialize in full stack development, MERN stack development, custom web application development, frontend development, backend development, React.js, Node.js, MongoDB, APIs, SaaS applications, AI-powered web apps, and AI voice agent integration.
What I build:
- Business websites and landing pages
- Custom web applications
- SaaS platforms and MVPs
- AI chatbots, automation and AI-powered sites
- Admin dashboards with authentication and user roles
- REST APIs and database integration
- Bug fixing and speed optimisation
Tech stack:
React · Openai API · Node.js · Express · Python · MongoDB · PostgreSQL · Tailwind CSS · Vercel · Base44 · Langchain · Supabase
Why clients stay:
- Fast, clear communication, no ghosting
- Clean, maintainable code
- Speed, SEO and mobile optimisation built in
- On-time delivery
- 30 days of support after handover
Every project is different, and the wrong package wastes your money. M
Get to know Jeremiah G
Full Stack Developer SaaS MVP Claude Code AI VOICE AGENT n8n
Level 1
- FromUnited States
- Member sinceFeb 2025
- Avg. response time1 hour
- Last delivery1 week
Languages
English, Spanish, French, German, Dutch
My Portfolio
Other Software Development Services I Offer
FAQ
What tech stack do you use?
I specialize in the MERN stack—MongoDB, Express.js, React and Node.js. This unified JavaScript ecosystem speeds up development and allows for seamless collaboration
Can you build both the front‑end and back‑end?
Yes. I design responsive React/Next.js interfaces and write robust Node.js back‑end services. Using MongoDB or Supabase (PostgreSQL), I deliver fully functional full‑stack solutions.
Do you use Supabase or Firebase?
I usually recommend Supabase because it provides root access to a PostgreSQL database, strong security and real‑time features. However, I’m comfortable working with Firebase or other databases if they better suit your project.
How do you handle authentication and security?
I implement secure authentication flows using Supabase Auth and row‑level security, or JWT/OAuth where appropriate HTTPS, environment variables and role‑based access control are standard in every project.
Will you deploy my project?
Absolutely. I deploy to Vercel or alternatives. I understand that Vercel’s usage‑based pricing and serverless limits can be tricky, so I configure deployments to balance cost, performance and scalability.
Do you integrate third‑party APIs?
Yes. I connect payment gateways, social logins, analytics services and any REST/GraphQL API your application requires. API integration is part of every Standard and Premium package.
How do you ensure scalability?
I design architectures with modular code, environment‑based configurations and cloud‑native patterns. Supabase and MongoDB scale horizontally, while Node.js and React allow for optimized performance under high traffic.
Can you build AI‑enabled features?
Yes. Supabase’s pgvector support enables vector searches and recommendation systems. I integrate AI APIs or custom models to deliver intelligent user experiences.
3 reviews for this Gig
| (3) | ||
| (0) | ||
| (0) | ||
| (0) | ||
| (0) |
Rating Breakdown
- Seller communication level
- Quality of delivery
- Value of delivery
Sort By
A alexx12_2

United States
Ongoing collaborationFrom the start of the project to the end I cannot fault this supplier. He's great in communication and responsiveness. Jeremiah grasped the concept of our requirements straight away and has delivered a first class platform for our start up business. I would highly recommend Jeremiah to others. First class service at a competitive price.
$50
Price
5 days
Duration
Helpful?J john_jerryr

United States
Jeremiah did an excellent job. He understood the issue quickly, communicated clearly throughout the process, and fixed everything exactly as needed. He was professional, responsive, and paid attention to the small details. The final result was clean and worked perfectly. I would definitely recommend Jeremiah to anyone looking for a reliable developer.
$50
Price
2 days
Duration
Helpful?J 
juancamilo143

United States
Jeremiah went above and beyond and was able to connect my Claude code to various other platforms like supabase and vercel and did it while trouble shooting and delivering on time.
$100-$200
Price
1 day
Duration
Helpful?
3 reviews for this Gig
| (3) | ||
| (0) | ||
| (0) | ||
| (0) | ||
| (0) |
Rating Breakdown
- Seller communication level
- Quality of delivery
- Value of delivery
Sort By
A alexx12_2

United States
Ongoing collaborationFrom the start of the project to the end I cannot fault this supplier. He's great in communication and responsiveness. Jeremiah grasped the concept of our requirements straight away and has delivered a first class platform for our start up business. I would highly recommend Jeremiah to others. First class service at a competitive price.
$50
Price
5 days
Duration
Helpful?J john_jerryr

United States
Jeremiah did an excellent job. He understood the issue quickly, communicated clearly throughout the process, and fixed everything exactly as needed. He was professional, responsive, and paid attention to the small details. The final result was clean and worked perfectly. I would definitely recommend Jeremiah to anyone looking for a reliable developer.
$50
Price
2 days
Duration
Helpful?J 
juancamilo143

United States
Jeremiah went above and beyond and was able to connect my Claude code to various other platforms like supabase and vercel and did it while trouble shooting and delivering on time.
$100-$200
Price
1 day
Duration
Helpful?
