AbdulHafeez
AbdulRaheem
Full-Stack Engineer with 7+ years building scalable systems at the intersection of systems design, performance, and business outcomes.
Selected Work
View all projects →Beeva.ai
Technical Lead building AI-powered skincare analysis platform for people with darker skin tones using React, TypeScript, Python, and LLMs.
IBM Weather Company
Architected authentication microservice serving 100M+ users and GraphQL API gateway consolidating 15+ microservices.
UN Drone Tasking Manager
Built drone imagery upload system with resumable multipart uploads for humanitarian mapping in disaster-prone regions.
Folawej Laundromart
Nigeria's first self-service laundromat platform generating $500K+ revenue with payment processing handling $20K+ monthly.
Ubenwa.ai
Built scalable data pipeline processing 10,000+ audio datasets and React Native apps achieving 100K+ downloads.
Recent Thoughts
View all posts →If it was observed, then it happened
Why does scrubbing yourself in the shower make you clean if you never actually touch anything? A first-principles journey through electron clouds, quantum forces, and the physics of getting clean.
The 22MB Return Value That Broke My Workflow
How a perfectly working activity silently broke a Temporal workflow by returning too much data through gRPC, and why passing data by reference beats passing it by value in distributed systems.
Why Indexes: A Story of 5 Billion Calculations
How a single index turned a bulk import doing 5 billion distance calculations from hours of agony into minutes. A deep dive into PostGIS, GiST indexes, and why spatial data breaks the rules.
A Fun Way to Imagine Memory Management
An interesting way to view computer memory and how to manage it, from stack vs heap to game dev techniques and real-world SAP data streaming.
Open Source
View GitHub →Canary
Open-source email template designer with a visual drag-and-drop builder. Self-host your email infrastructure with support for multiple email providers.
Possum
A TypeScript library designed to enhance the reliability of HTTP requests in web applications.
Crete
TypeScript Data Structures and Utils You Might Need.
UseZap
A spotlight-inspired macOS launcher that supercharges navigation across apps, monitors, and workspaces.
Experiments
View all experiments →USAG-1 Tooth Regeneration
Humans quietly carry a third set of teeth, frozen mid-development by a single protein. An interactive 3D walkthrough of TRG-035 — the Kyoto University antibody now in human trials that releases the brake and lets a real tooth grow back.
Goalpost Physics
Why does the goalpost sound different? Explore how angle and spin affect sound frequency with an interactive 3D simulation.
Newcomb's Paradox
An Oracle predicts your choice before you make it. Explore expected utility, strategic dominance, and three conflicting decision theory frameworks with interactive simulations.
Let's Connect
Always interested in new opportunities, collaborations, and conversations about technology and software architecture.