Hello, I'm Abdulkhalek Muhammad
I build high-performance systems and clean user interfaces with a focus on reliability and scalability. My work bridges the gap between complex backend architecture and seamless product experiences using Python, Go, and React.
I design systems with clear module boundaries and explicit contracts between components. Starting with the data model and working outward ensures every layer has a well-defined responsibility.
Strict module separation, explicit interfaces, and dependency injection for testable, maintainable code.
OpenAPI specs and type-safe contracts before implementation. The interface drives the architecture, not the other way around.
Focused test coverage on business logic and integration points. Testing what matters, not chasing metrics.
The best code is the code you don't write. I favor straightforward solutions, proven patterns, and boring technology over complex abstractions. Every line of code is a liability.
Understanding both backend systems and frontend experiences leads to better architecture decisions. The best APIs are designed with the consumer in mind.
My toolbox is selected for stability and ecosystem maturity. I don't chase trends; I choose tools that solve problems efficiently.
A voice recorder application with built-in AI transcription powered by OpenAI Whisper. Records audio from any device and converts speech to text with high accuracy.
Integrating real-time audio recording with on-device ML model inference while maintaining a responsive UI. Handled using async processing and efficient audio buffering.
A production-ready WebSocket signaling server for voice calling with Redis-backed state management. Supports horizontal scaling via Redis pub/sub, JWT auth, and atomic session management using Lua scripts.
Ensuring race-condition-safe call state transitions across multiple server instances. Solved using Redis Lua scripts for atomic operations and pub/sub for cross-instance messaging.
A full-featured e-commerce platform for digital software licenses serving 100k+ customers. Handles product catalog, payment processing, order fulfillment with activation codes, and customer support integration.
Building a secure digital product delivery system with license key management, payment gateway integration, and automated fulfillment — all from scratch with custom code.
Full-stack web applications, REST APIs, database design, authentication, payment integration, deployment pipeline.
System design document, database schema, OpenAPI specification, tech stack recommendation, scalability plan.
WebSocket/WebRTC implementations, signaling servers, real-time data pipelines, pub/sub architectures.