You will get Expert Full-Stack SaaS Developer | React Next.js Node.js Python PostgreSQL
Project details
🚀 A SaaS Platform That's Built to Scale, Not Just Launch
Plenty of developers can ship an MVP that works in a demo. Fewer can build one that still holds up once real users, real data, and real edge cases show up. I've led architectural refactors at a UK fintech company that improved system performance by ~20%, and co-founded a startup where I owned the full MVP build, shipping it in under 3 months and acquiring 1,000 users in the first month.
🧱 Architecture-First, Not Feature-First
Before I write a line of code, I map out the data model, API structure, and how the system will hold up under growth. That upfront thinking is what separates a platform you can build on for years from one you'll be rebuilding in six months.
⚙️ What You Actually Get
✔️ Clean, documented code your future team can actually maintain
✔️ Multi-tenant, role-based architecture designed for real growth, not just your first 10 users
✔️ A deployment pipeline that's ready from day one, not bolted on later
✔️ Direct ownership from architecture through production monitoring
📩 If you're building a SaaS product you actually intend to scale, not just demo, let's talk about how to build it right the first time.
Plenty of developers can ship an MVP that works in a demo. Fewer can build one that still holds up once real users, real data, and real edge cases show up. I've led architectural refactors at a UK fintech company that improved system performance by ~20%, and co-founded a startup where I owned the full MVP build, shipping it in under 3 months and acquiring 1,000 users in the first month.
🧱 Architecture-First, Not Feature-First
Before I write a line of code, I map out the data model, API structure, and how the system will hold up under growth. That upfront thinking is what separates a platform you can build on for years from one you'll be rebuilding in six months.
⚙️ What You Actually Get
✔️ Clean, documented code your future team can actually maintain
✔️ Multi-tenant, role-based architecture designed for real growth, not just your first 10 users
✔️ A deployment pipeline that's ready from day one, not bolted on later
✔️ Direct ownership from architecture through production monitoring
📩 If you're building a SaaS product you actually intend to scale, not just demo, let's talk about how to build it right the first time.
Programming Languages
JavaScript, Python, TypeScriptCoding Expertise
Cross Browser & Device Compatibility, Performance Optimization, SecurityWhat's included
| Service Tiers |
Starter
$150
|
Standard
$450
|
Advanced
$750
|
|---|---|---|---|
| Delivery Time | 3 days | 7 days | 14 days |
Number of Revisions | 3 | 5 | 7 |
Number of Pages | 3 | 8 | 12 |
Design Customization | - | - | |
Content Upload | - | ||
Responsive Design | |||
Source Code |
Optional add-ons
You can add these on the next page.
Fast Delivery
+$50 - $150
Additional Revision
+$50
Additional Page
(+ 1 Day)
+$50
Design Customization
(+ 2 Days)
+$100
Content Upload
(+ 2 Days)
+$100Frequently asked questions
4 reviews
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EL
Eric L.
Oct 9, 2023
Store register api
EL
Eric L.
Sep 4, 2023
Pdf generation
AA
Alex A.
Aug 13, 2023
Node Js Backend Developer needed to Resolve Authentication Issues
I am extremely grateful for Emmanuel's exceptional skills in resolving an authentication issue in my application. His adept time management, extensive knowledge, understanding, and expert problem-solving make him the top choice for technical support. I highly recommend him
AP
Angie P.
Aug 10, 2023
React Native Developer for Neat and Responsive iOS and Android App
Exceptional experience working with Emmanuel on completing our mobile app project. His commitment to timely delivery was truly impressive, as he ensured that the project was completed without any delays. His communication skills, attention to detail, and technical expertise were instrumental in achieving a successful outcome. Looking forward to collaborating again in the future!
Thanks
Thanks
About Emmanuel
Full-Stack AI Developer | SaaS | AI Voice Agent | Vapi | Retell | N8N
Lagos, Nigeria - 2:44 pm local time
With 5+ years shipping software in fintech and startup environments, I bring engineering discipline from systems that move real money (deposits, withdrawals, coin exchange) into the AI agent and automation space. That background matters: when your voice agent books an appointment or your workflow touches customer data, you want someone who has already built for correctness under pressure.
𝗪𝗵𝗮𝘁 𝗜 𝗕𝘂𝗶𝗹𝗱
🤖 AI Agents & Automation: multi-agent orchestration (LangGraph), RAG pipelines, n8n workflows, voice agents (Vapi, Retell)
🏗️ SaaS Platforms: multi-tenant architecture, auth, billing-ready backends, admin dashboards
⚙️ Backend & APIs: Node.js, NestJS, FastAPI, Go, REST APIs, microservices
🖥️ Frontend: React, Next.js, React Native, TypeScript
🗄️ Data: PostgreSQL, MongoDB, Redis, Qdrant, pgvector
𝗣𝗿𝗼𝘃𝗲𝗻 𝗥𝗲𝘀𝘂𝗹𝘁𝘀
✅ Led architectural refactors at a UK fintech company resulting in ~20% system performance improvement and ~25% higher team delivery velocity
✅ Reduced API response times by ~30% (800ms to 560ms) through database optimization and backend refactoring
✅ Cut frontend-backend integration issues by ~40% through clean, well-documented REST API design
✅ Co-founded a startup and shipped the MVP in under 3 months, acquiring 1,000 users in month one
✅ Built and maintained systems handling 50,000+ daily requests on a high-traffic fintech platform
✅ Architected a production RAG system processing 10,000+ documents with sub-200ms retrieval latency
✅ Built a multi-agent research orchestration system with parallel agent coordination and real-time streaming updates
𝗪𝗵𝘆 𝗪𝗼𝗿𝗸 𝗪𝗶𝘁𝗵 𝗠𝗲
✔ Fintech-grade backend discipline: I've built systems where correctness isn't optional
✔ Full ownership from architecture to deployment, not just feature delivery
✔ Clear communication and fast iteration
✔ Certified in AI Agents Fundamentals (Hugging Face) and backend/database development (Meta)
If you're building an AI-powered SaaS product, need a voice agent or automation workflow that actually holds up in production, or want a fullstack engineer who treats your system like it's handling real money, message me with what you're building. I'll tell you honestly what it'll take.
AI Agent Developer, Voice AI Agent, Voice Agent Developer, Vapi Developer, Retell AI, n8n Automation, n8n Developer, AI Automation Expert, SaaS Developer, Full Stack Developer, Full Stack SaaS Developer, MVP Developer, LangChain Developer, LangGraph, RAG Developer, RAG Pipeline, LLM Integration, OpenAI API Developer, AI Chatbot Developer, Multi-Agent Systems, AI Workflow Automation, React Developer, React Native Developer, Next.js Developer, Node.js Developer, NestJS Developer, TypeScript Developer, Python Developer, FastAPI Developer, Go Developer, Golang, PostgreSQL, MongoDB, Redis, Qdrant, Vector Database, REST API Development, Microservices Architecture, Backend Developer, API Developer, Fintech Developer, Payment Systems, Stripe Integration, CI/CD, Docker, AWS, GCP, SaaS MVP Development, Startup MVP Developer, Automation Engineer, Business Process Automation
Steps for completing your project
After purchasing the project, send requirements so Emmanuel can start the project.
Delivery time starts when Emmanuel receives requirements from you.
Emmanuel works on your project following the steps below.
Revisions may occur after the delivery date.
Discovery & Architecture Planning
We align on core features, data model, and system architecture before any code is written, so the foundation supports where the product is headed, not just where it starts.
Database & API Design
I design the database schema and REST API structure, and share it for your review before backend development begins.