Is Muhammad Sesay a software engineer in Sierra Leone?

Yes. Muhammad Sesay is a full stack developer and software engineer based in Freetown, Sierra Leone. He builds web applications, backend systems, and AI-powered tools, and is a co-founder of Nexlura, a software consultancy in Freetown.

What kind of software development work does he do?

Full-stack product work (React, Next.js, Node.js, PostgreSQL), AI/LLM systems (RAG, agents, MCP, LangGraph), and developer tooling. Recent public work includes DevAssist, a LEPA support agent, an AI document pipeline, and an AI job application assistant.

What technologies does Muhammad Sesay work with?

Go, Python, JavaScript, and TypeScript, with React, Next.js, Node.js, PostgreSQL, Docker, and LLM tooling such as RAG, embeddings, AI agents, and MCP.

How can I hire or contact a full stack developer in Freetown?

The fastest way is WhatsApp. For a longer note, email contact@sesay.work. Both are on the contact page.

About

Muhammad Sesay

Full Stack Developer & Software Engineer based in Freetown, Sierra Leone.

I build web applications, backend systems, AI-powered workflows, and developer tooling. Lately I've been spending more time on LLMs, MCP, agents, RAG, and the infrastructure that makes those systems usable.

I studied Information Technology at Limkokwing University of Creative Technology. I'm a co-founder of Nexlura, a software consultancy in Freetown.

I don't just ship software — I write down what I learn. That includes technical notes on MCP and agents, and an ongoing knowledge base called Law for Software Developers.

What I'm currently learning

AI / LLM engineering
MCP and developer tools
AI agents and harnesses
RAG and embeddings
Software architecture
Law for Software Developers

Experience

2026
JoinHelix.co
Full Stack Developer · Remote
June 2026 – August 2026
Member platform and AI workflows around community calls, retrieval, and scheduled agents.
- Built an automated ingestion pipeline pulling community call recordings from Google Drive and using LLMs to extract member wins, commitments and profile facts into structured PostgreSQL data.
- Developed the member platform in Next.js, including directory, profiles, onboarding intake and invite flow, with row-level database rules.
- Built a retrieval-augmented chat assistant over call transcripts and member records using embedding search and per-request token cost tracking.
- Delivered scheduled AI agents that generate weekly community summaries and introduction suggestions.
2024 — 2025
Recyclium AG
Full Stack Developer · Remote
September 2024 – September 2025
Product tracking, reporting, and operations tooling for a deposit-return style product workflow.
- Implemented product QR code generation and product stage tracking.
- Built reporting for collection, storage, and export, including PDF exports.
- Developed CRUD for team members and missions.
- Integrated coupon issuance and redemption.
2023 — 2024
Legacy Network AG
Full Stack Developer · Remote
June 2023 – April 2024
Backend work around blockchain-backed client data, referrals, and cloud deployment.
- Programmed a transaction-tool backend for interacting with the blockchain to fetch client information for dashboard rendering.
- Assembled referral program APIs and wired them to the frontend.
- Upgraded in-house app databases for scalability.
- Streamlined application deployment to cloud services.

Education

Limkokwing University of Creative Technology

Bachelor of Science — Information Technology

February 2023 · Freetown, Sierra Leone

Coursework includes Data Structures and Algorithms, Web and Object-oriented Programming, Probability & Statistics, IT Intellectual Property Rights and Ethics, Principles of Software Engineering.

Technologies

Languages

Go
Python
JavaScript
TypeScript

Frontend

React
Next.js
Redux
HTML5
CSS3
Tailwind CSS
jQuery

Backend

Go
Node.js
REST APIs
PostgreSQL

AI / LLM

LLM integration
Prompt engineering
RAG
Embeddings
AI agents
MCP
Ollama

Infrastructure

Docker
Redis
MinIO
Render
Vercel
Git
GitHub

Mobile

React Native
Expo

Writing

Essays go to Medium. Law for Software Developers lives on GitHub as an ongoing series.

Download résumé (PDF)

Frequently asked

Is Muhammad Sesay a software engineer in Sierra Leone?: Yes. Muhammad Sesay is a full stack developer and software engineer based in Freetown, Sierra Leone. He builds web applications, backend systems, and AI-powered tools, and is a co-founder of Nexlura, a software consultancy in Freetown.
What kind of software development work does he do?: Full-stack product work (React, Next.js, Node.js, PostgreSQL), AI/LLM systems (RAG, agents, MCP, LangGraph), and developer tooling. Recent public work includes DevAssist, a LEPA support agent, an AI document pipeline, and an AI job application assistant.
What technologies does Muhammad Sesay work with?: Go, Python, JavaScript, and TypeScript, with React, Next.js, Node.js, PostgreSQL, Docker, and LLM tooling such as RAG, embeddings, AI agents, and MCP.
How can I hire or contact a full stack developer in Freetown?: The fastest way is WhatsApp. For a longer note, email contact@sesay.work. Both are on the contact page.