I started by building software. Today, I build intelligent systems.
I'm Feyijimi Erinle, an AI Engineer and Software Engineer based in Lagos, Nigeria. My work has evolved from frontend development into full-stack engineering, backend systems, cloud infrastructure and AI engineering. Today, I design and build intelligent systems, AI products, automation and scalable software that solve real business problems.
Lagos, Nigeria · Working globally · Building since 2019.
My Story, What Drives Me, Beyond Work
My Story
My name is Feyijimi Erinle, but most people simply call me ERIN. I am based in Lagos, Nigeria, and my journey into tech started long before I realised it. I was the kid who wanted to know why computers behaved the way they did, why websites worked the way they did, and why a single line of code could change everything. I was always exploring, fixing, breaking, and testing things without knowing it was shaping my future.
Things became clearer during my final year at the University of Lagos, where I studied Actuarial Science. I had no defined plan for after graduation. Then one afternoon, someone came to our department to introduce a beginner Python workshop, and that single moment shifted everything for me. I followed the spark and it opened a world I did not know I needed.
I taught myself to code. I built small projects, made mistakes, and learned from them. There were days when nothing made sense, but the joy of solving problems kept me going. Over time, I realised my strength was not just in writing code but in explaining it and making it useful to other people, which is the thread that still runs through everything I build today.
What Drives Me
Today, I lead AI engineering work at Refactrd, where I help startups and enterprise teams move from AI experimentation to systems that actually change how they operate. That work sits on top of years spent as a full stack and frontend engineer, which is why I care as much about how a product feels to use as I do about whether the model behind it works.
What drives me is the gap between what technology can do and what most people actually understand about it. I am genuinely more interested in whether a workflow saves someone real time than in whether it sounds impressive in a pitch deck. Building and teaching have always been the same instinct for me, just pointed in different directions.
Beyond Work
Outside of work, I care about fitness, music, and discovering new places when I get the chance. I enjoy real conversations with other builders and creators, sharing what I have learned and learning from what they are working on in return.
At the core of it all, I believe in continuous growth, as an engineer and as a person. I am always looking for the next thing to learn and the next way to make what I build actually matter to someone.
Building beyond the model.
AI is rarely the whole product. A useful AI system needs software around it, data behind it, workflows connecting it to the business and infrastructure that can support it. That is where my work sits.
AI Engineering
AI agents, RAG systems, LLM applications, multi-agent systems, evaluation and AI workflows.
AI Automation
Turning repetitive business processes into intelligent workflows that can understand information, make bounded decisions and trigger actions.
AI Product Development
Taking AI product ideas from architecture and prototyping through application engineering and production.
AI Systems Architecture
Designing the components, data flows, integrations, controls and infrastructure around AI systems.
Software Engineering
Building full-stack applications, APIs, backend services, platforms and cloud infrastructure.
Technical Writing
Making complex engineering systems understandable through clear technical documentation and developer-focused content.
Refactrd, Remote - Lead AI Engineer
Apr 2025 - Present
At Refactrd, I lead the design and delivery of AI-powered products, intelligent automation, and workflow optimization systems for startups and enterprise organizations...
Datamellon, London, UK - Full-Stack Engineer, AI Solutions
Nov 2022 - Jan 2026
At Datamellon, I built cloud-based fullstack applications and led development on AI-powered tools used across finance, logistics, and enterprise operations...
ERIN The Brand, - Founder & Principal Engineer
Jan 2021 - Present
ERIN is my personal brand and independent practice where I combine software engineering, technical writing, and developer experience to build digital solutions...
Shestel, New York, United States - Founding Software Engineer
Jan 2021 - Sep 2023
I joined Shestel as the first engineer and worked closely with the CEO to lay the technical foundation for the platform...
Dash Language School, Lagos, Nigeria - Frontend Engineer (Team Lead)
Jan 2020 - May 2022
At Dash Language School, I led a small frontend team to design and deploy mobile-first, responsive web applications...
Side Hustle, - Frontend Engineer
Mar 2019 - Dec 2019
At Side Hustle, I led the frontend engineering team during an internship program...
AI is the latest layer, not the only layer.
My AI work is grounded in years of software engineering. That foundation shapes how I build AI systems because production AI still needs applications, APIs, databases, infrastructure, authentication, observability, testing and deployment.
Frontend
Backend
Data
Cloud & Infrastructure
AI
Engineering practices
Building what comes next.
Right now, I'm focused on the space where AI, software engineering and business workflows meet.
AI agents & agentic workflows
Practical, task-bounded automation.
AI-powered products
Internal business systems and products.
Workflow automation
Repetitive, information-heavy work.
Knowledge & retrieval
Making organisational information useful.
Production-ready architecture
Evaluation, controls and observability.
Idea to usable system
Helping businesses actually ship.
The goal is not to put AI everywhere. The goal is to build better systems with it.
Have a problem worth building around?
Whether you are exploring an AI system, building an AI product or need a software product engineered from the ground up, let's talk about what you are trying to achieve.

