Chibueze Aniezeofor

Backend Engineer · Node.js · TypeScript · AI Systems

📍 Nigeria (Remote)  |  🌐 codad5.me  |  ✉️ aniezeoformic@gmail.com

🔗 linkedin.com/in/chibueze-michael  |  github.com/codad5

Summary

Backend engineer with 5+ years building scalable APIs, AI-powered platforms, and production infrastructure. Known for taking products from zero to scale — architected the backend for AwaDoc from the ground up to 100,000+ users, processing 240k+ daily messages with live payment flows. Also builds deep systems-level projects from scratch: designed a custom binary tunneling protocol over TLS, multi-tenant RBAC architecture, and automated ACME certificate infrastructure for raba, an open-source ngrok alternative in Rust. Comfortable owning complex backend systems end-to-end, from system design to production deployment. Background in Mechanical Engineering sharpens how I approach systems thinking and performance under constraints.

Technical Skills

Experience

Founding Engineer — AwaDoc (AI Health Startup, Nigeria)

January 2024 – Present

AwaDoc is an AI-driven health assistant that gives Nigerians access to reliable medical guidance via WhatsApp.

• Architected the full backend from scratch — API layer, WhatsApp bot infrastructure, Admin web app, and payment systems — scaling to 100,000+ active users across multiple Nigerian states.
• Engineered a message processing pipeline handling 240,000+ daily messages, with ~30% converting to paid transactions.
• Engineered a high-throughput queue system capable of sustaining 10,000+ messages per hour with consistent reliability under load.
• Integrated OpenAI and DeepSeek for natural language processing; led prompt optimization work that reduced AI hallucinations by 40%.
• Led security hardening after an early breach: enforced Redis auth, Docker network isolation, SSL termination, and access controls.
• Stack: Node.js, NestJS, Express, MongoDB, Redis, BullMQ, Docker, Qdrant, OpenAI, WhatsApp Business API.

Contract WordPress Plugin Developer — Fusion Intelligence (Nigeria)

December 2024 – Present

• Developed custom WordPress themes and plugins that improved product delivery speed and reliability for the company's client base.
• Maintained 99.9% uptime across deployed plugins; optimized workflow efficiency by 40% and increased user engagement by 50% through responsive design improvements.

PHP Developer — Cyberinfomatic (Nigeria)

March 2024 – December 2024

• Shipped a real-time crypto price tracking plugin for WordPress using PHP.
• Developed a Laravel-based License Management System, cutting validation time by 60% via Redis caching.
• Secured WordPress.org plugin approval within 2 weeks of submission; boosted overall plugin performance by 70%.

Backend Developer — Appsthathelps (Mobile App Agency)

July 2023 – August 2024

• Designed and maintained Laravel APIs powering a mobile app with 5,000+ downloads.
• Integrated OneSignal push notifications; sustained 99.9% API uptime across production.
• Automated recurring data updates via PHP cron jobs, reducing manual engineering work by 90%.

Backend Developer — Clusterlearn (Learning Platform)

January 2023 – June 2023

• Implemented a Node.js learner-matching system that improved platform retention by 40%.
• Integrated Google Calendar API to streamline scheduling, improving efficiency by 50%.
• Strengthened authentication security with Redis-based email validation mechanisms.

Freelance PHP & Web Developer (Upwork)

2020 – Present

• Delivered 10+ production websites and 5+ open-source contributions across industries; 90% client satisfaction rating.
• Delivered custom PHP plugins, scrapers, and dashboards for startups and NGOs.

Projects

raba — Self-Hosted Tunneling Platform (Open Source, ngrok alternative)

Rust · TypeScript/React · Docker · GitHub Actions · github.com/codad5/raba

• Designed and implemented a custom multiplexed binary protocol over TLS from scratch — tunneling HTTP, TCP, and UDP traffic over a single persistent connection per client with no WebSocket or HTTP-over-HTTP dependency.
• Architected a multi-tenant RBAC system with three isolated credential types (JWT sessions, PATs, tunnel secrets); identified and closed a domain-hijack security gap via transactional project revocation.
• Automated Let's Encrypt certificate issuance and renewal via delegated DNS-01, enabling per-tenant custom domains without the platform ever storing third-party DNS credentials.
• Shipped a full CI/CD pipeline (GitHub Actions) publishing Docker images to GHCR and cross-platform CLI binaries for Linux, macOS, and Windows on tagged releases; 176 tests passing, clippy-clean across the workspace.

RISMS — Multi-Tenant School Management SaaS

PHP 8.3 · Laravel · PostgreSQL · Vue 3 · Inertia.js · Docker · Traefik · Cloudflare · staging.risms.xyz

• Architected and built a multi-tenant SaaS platform from scratch supporting three tenant-resolution strategies (path prefix, wildcard subdomain, customer-owned custom domain) behind a single shared route and controller layer — no route duplication across access methods.
• Designed a ledger-first financial subsystem: wallet balances computed from an append-only transaction log (never a mutable column), money as a first-class value object in minor units, and a pluggable per-institution payment provider architecture (encrypted per-tenant credentials, per-tenant webhook signature verification) supporting Paystack and cash without touching call-site code.
• Built a memory-bounded three-pass streaming CSV/XLSX bulk import pipeline — distinct-values pass, user mapping pass, validated import pass — keeping memory flat regardless of file size with per-row transactional isolation so one bad row never aborts the batch.
• Identified and fixed 6+ unbounded-query bugs across production pages (attendance, payment history, wallet ledger, admin dashboard) converting each to properly paginated, indexed queries with deterministic sort keys.
• Enforced strict static analysis (PHPStan/Larastan) and a 780+ automated test suite as real merge gates, catching cross-tenant boundary leaks, nullable-type mismatches, and forged webhook signatures before deployment.

FLI — Rust CLI Framework (Open Source)

Rust · crates.io/crates/fli · github.com/codad5/fli

• Type-safe CLI library for Rust inspired by commander.js — 12,000+ downloads on crates.io.
• Supports hierarchical command structures, subcommands, flexible option types, and compile-time guarantees.
• Auto-generates formatted help output with Cargo.toml metadata extraction.

PDFz — High-Performance PDF Extraction Service

Rust · Node.js · Docker · RabbitMQ · Redis

• Distributed PDF extraction service with support for both Tesseract and Ollama OCR engines.
• Async queue-based processing via RabbitMQ for concurrent workload management; >85% uptime with retry mechanisms.

Resurgee — AI Task Orchestration Platform

Python · FastAPI · PostgreSQL · Redis · Celery · OpenAI GPT-4 · Docker

• AI layer on top of Google Tasks and Calendar: natural language task creation, smart rescheduling based on productivity patterns, bidirectional sync across multiple accounts.
• Unified OAuth flow handling user auth and multi-calendar linking in a single callback.

Education

B.Eng, Mechanical Engineering — University of Nigeria, Nsukka Graduated 2025