About

AI & Software Engineer | Backend Engineer

Samwel Ngusa

Software engineer focused on backend systems and AI-enabled product development. Experienced in REST APIs, event-driven microservices, messaging platforms, RAG, and agentic AI workflows.

Strong with TypeScript/NestJS and Python/FastAPI, with production work across PostgreSQL, Redis, RabbitMQ, Docker, and LLM integrations. I use agentic coding workflows with Codex, Claude, and Junie for repository analysis, implementation planning, debugging, testing, code review, and refactoring.

My Skills & Tools

Practical tools I use to build backend platforms, AI workflows, and product interfaces.

Backend Systems

NestJS
FastAPI
PostgreSQL
Redis
RabbitMQ
Docker
REST APIs
Microservices

AI & Automation

OpenAI
LangChain
LangGraph
RAG
AI Agents
Ollama
Hugging Face

Frontend

Next.js
React
TypeScript
Tailwind CSS

Developer Tools

Codex
Claude
Junie
Git
Testing
Spec-driven workflows
Spec Kit

Experience

Where I've been building and learning.

Nov 2025 - Present

iPF Softwares · AI & Software Engineer

Participating in production software and AI-enabled systems that solve real business problems through reliable backend services and intelligent automation. Building APIs, service integrations, and AI features with TypeScript/NestJS, Python/FastAPI, PostgreSQL, Docker, and modern LLM tooling.

Python
FastAPI
NestJS
TypeScript
OpenAI
Ollama
PostgreSQL
Docker
REST APIs
Microservices
Codex
Claude
Junie

Nov 2025 - Present

Notify Africa · Backend Engineer

Building backend services and integrations for Notify Africa's marketing and sales communication platform for SMEs across Africa, including SMS and WhatsApp communication workflows, message processing, webhooks, and business-facing APIs.

NestJS
TypeScript
PostgreSQL
RabbitMQ
Redis
Docker
REST APIs
Microservices

June 2024 - Present

Freelance · Machine Learning, AI & Backend Engineer

Freelance ML and AI Engineer specializing in AI Agents, RAG systems, model finetuning, and scalable backend development. Building intelligent AI-powered solutions and custom backend systems for clients worldwide.

Python
FastAPI
NestJS
Langchain
LangGraph
OpenAI
HuggingFace
RAG
LLM Finetuning
PostgreSQL
Docker
Next.js
TypeScript

Testimonials

What people say about working with me

Hadoram M.

CEO & Founder | Website Portfolio

Sep 2025

I hired Samuel N. to build my website. Of course he did an outstanding work it helped me reach more clients internationally and within the country. My company has secured a good profile and more visitors. All thanks to Mr. Sam. I recommend him for different tasks concerning his talent and professionalism. 

Get in touch

Have a project in mind or want to collaborate? I'd love to hear from you.