
Nevily Simiyu
Nairobi, Kenya
Nevily Simiyu
Software engineer
Category : Artificial intelligence (AI)
I am a Full-Stack Engineer specializing in building AI-powered SaaS platforms that integrate Large Language Models securely with real business data.
Recent work includes:
• AI-powered customer support SaaS with subscriptions and WhatsApp integration
• Hotel booking platform with Stripe & Mpesa payments
• Real-time collaboration platform using Socket.io
• Multi-module creator platform (courses, email marketing, automation)
I don’t just connect OpenAI to an app — I design production-ready AI systems that:
Query databases securely using structured tool-calling
Respect multi-tenant data isolation (RLS enforced)
Deliver accurate, structured responses
Scale from MVP to production
With 4+ years of experience in the Next.js and MERN ecosystem, I focus on the intersection of:
• Generative AI
• Secure SaaS architecture
• Financial and operational data systems
🚀 AI & LLM Specialization
AI Assistants & Agents
Custom GPT-4o, Claude, and Gemini integrations using structured tool-calling patterns.
Secure Database Integration
Server-side AI routes (Next.js App Router) with Supabase/PostgreSQL.
Strict RLS enforcement — no unsafe SQL generation.
RAG Architecture
Embeddings + Vector Databases (pgvector, Pinecone) for high-accuracy knowledge retrieval.
Openclaw + vps(aws, google console vm instance) installation connection to crm and google calendar
AI SaaS Infrastructure
Multi-tenant chatbot platforms with usage tracking, subscription billing, and scalable architecture.
🧱 Full-Stack Expertise
Frontend
Next.js (App Router), React, Tailwind CSS
Backend
Node.js, Express, Supabase, PostgreSQL, MongoDB
Fintech
Stripe (Subscriptions & One-Time Payments)
M-Pesa Integration
PayPal Integration
Deployment
Vercel, Docker, CI/CD
🛡 Why Clients Hire Me
Security First
I design AI systems that never bypass database protections.
Production Thinking
Clean architecture. Maintainable code. Clear documentation.
Business-Aware AI
I build AI that understands financial data, healthcare logic, and SaaS metrics — not just chatbots.
If you're building:
• A Chat-to-SQL financial assistant
• An AI customer support platform
• A multi-tenant SaaS with LLM integration
• Custom AI agents, open claw installation and integrations
Let’s build it the right way.
Recent work includes:
• AI-powered customer support SaaS with subscriptions and WhatsApp integration
• Hotel booking platform with Stripe & Mpesa payments
• Real-time collaboration platform using Socket.io
• Multi-module creator platform (courses, email marketing, automation)
I don’t just connect OpenAI to an app — I design production-ready AI systems that:
Query databases securely using structured tool-calling
Respect multi-tenant data isolation (RLS enforced)
Deliver accurate, structured responses
Scale from MVP to production
With 4+ years of experience in the Next.js and MERN ecosystem, I focus on the intersection of:
• Generative AI
• Secure SaaS architecture
• Financial and operational data systems
🚀 AI & LLM Specialization
AI Assistants & Agents
Custom GPT-4o, Claude, and Gemini integrations using structured tool-calling patterns.
Secure Database Integration
Server-side AI routes (Next.js App Router) with Supabase/PostgreSQL.
Strict RLS enforcement — no unsafe SQL generation.
RAG Architecture
Embeddings + Vector Databases (pgvector, Pinecone) for high-accuracy knowledge retrieval.
Openclaw + vps(aws, google console vm instance) installation connection to crm and google calendar
AI SaaS Infrastructure
Multi-tenant chatbot platforms with usage tracking, subscription billing, and scalable architecture.
🧱 Full-Stack Expertise
Frontend
Next.js (App Router), React, Tailwind CSS
Backend
Node.js, Express, Supabase, PostgreSQL, MongoDB
Fintech
Stripe (Subscriptions & One-Time Payments)
M-Pesa Integration
PayPal Integration
Deployment
Vercel, Docker, CI/CD
🛡 Why Clients Hire Me
Security First
I design AI systems that never bypass database protections.
Production Thinking
Clean architecture. Maintainable code. Clear documentation.
Business-Aware AI
I build AI that understands financial data, healthcare logic, and SaaS metrics — not just chatbots.
If you're building:
• A Chat-to-SQL financial assistant
• An AI customer support platform
• A multi-tenant SaaS with LLM integration
• Custom AI agents, open claw installation and integrations
Let’s build it the right way.
Working hours
- Monday:08h00 To 18h00
- Tuesday:08h00 To 18h00
- Wednesday:08h00 To 18h00
- Thursday:08h00 To 18h00
- Friday:08h00 To 18h00
- Saturday:Not available
- Sunday:Not available
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