Osaretin JohnsonFull-Stack Developer & 4× Hackathon Winner
I'm a full-stack developer based in the Eastern Cape, South Africa. I build real-world AI systems, client platforms, and tools that solve problems people actually have — and I've won 4 national hackathons doing it.
Education & Certifications
My academic journey and professional certifications that shaped my expertise
BCom Honours
BCom Honours
Bachelor of Commerce Honours in Information Systems
University of Fort Hare
✓ CompletedBCom Degree
BCom Degree
Bachelor of Commerce in Information Systems
University of Fort Hare
✓ CompletedCertifications
AI & ML
AI & ML
Certificate in AI and Machine Learning
MICT-SETA
Data Science
Data Science
Certificate in Introduction to Data Science
Cisco Networking Academy
JavaScript
JavaScript
Certificate in Basics of JavaScript
Cisco Networking Academy
Cybersecurity
Cybersecurity
Certificate in Cybersecurity
EBL Institute of Business and Technology
Arduino
Arduino
Arduino Certification on Electronics and Physical Computing
Cortex Hub
Community & Leadership
Beyond building products, I invest in people. I mentor young learners in AI, robotics, and programming — and I founded and organise community initiatives that bring technology to students who wouldn't otherwise have access to it.
MCP Hackathon Africa 2025
Organiser & digital marketing lead
I contributed to the planning and coordination of the MCP Hackathon, supporting logistical and organisational aspects of the event. In addition, I cre...
AI for Good 2025
Mentor, Robotics for Good Youth Challenge
I was selected as a mentor for the AI for Good – Robotics for Good Youth Challenge, where I supported young teams as they worked through technical and...
Arduino Sessions
Facilitator, primary and high school learners
I planned and facilitated Arduino workshops for primary and high school learners during the school holidays. The workshops introduced young participan...
Dash Robot Sessions
Lead, hands-on robotics learning
I led hands-on sessions with Dash robots, teaching young learners the fundamentals of robotics and guiding them through interactive activities. In add...
The Cortex Hub Student Club
Founder
It started simply: a group of us coming to the hub to get our school assignments done. But the more time we spent there, the more we realised the spac...
My Tech Stack
C#
Intermediate
ASP.NET
Intermediate
JavaScript
Intermediate
Python
Intermediate
ReactJS
Intermediate
NextJS
Intermediate
SQL
Intermediate
HTML
Proficient
Figma
Intermediate
How I Work
Understand
I start by talking to the people the problem actually affects. Before building the SMME funding platform, I needed to understand why small businesses were failing to access grants that existed — not just that they were failing.
Ideate
I think in systems before I think in code. At the Swedish-South African hackathon, the winning idea wasn't the most technical — it was the one that made the most sense for the communities it was meant to serve.
Build
I ship under pressure. I've delivered production-ready AI systems in 48-hour hackathons and maintained clean architecture doing it. Speed doesn't excuse mess.
Deploy
Getting it live is only the beginning. The platforms I've built for clients — WasteTakers, InnoCom, CitizenTV — are up and running.
Learn
Every project leaves me with something I'd do differently. I write it down. That's why each build is faster and cleaner than the last.