AI & Software Engineer

Hi, I'm Samwel

I build reliable software and AI systems that

Based in Dar es Salaam, working with growing businesses that need practical backend platforms, messaging workflows, and AI tools.

About me

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Recent projects

A snapshot of what I've been building lately.

E-Commerce Backend

Comprehensive e-commerce backend API with product, order, and customer management, JWT authentication, shopping cart, and role-based access control.

NestJSPostgreSQLTypeORMTypeScriptJWT

Enterprise RAG System

A personal, observable RAG system for structured knowledge built for reliability and traceability in production.

PythonFastAPIChromaDBOpenAI

ETL Data Pipeline

Robust ETL pipeline that extracts data from files, cleans and transforms it, then loads into a PostgreSQL data warehouse. Fully containerized with Docker.

PythonFastAPIPostgreSQLDockerPandas

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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

Blog

Latest Articles

Thoughts on AI systems, engineering, and things I build.

Building Production-Ready Agentic AI Systems

A deep dive into the 7-layer architecture that makes agentic systems reliable, observable, and scalable in real-world deployments.

RAG in the Enterprise: Beyond the Basics

What it actually takes to move a retrieval-augmented generation system from prototype to production observability, chunking strategy, and evaluation.

February 20, 2025

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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.