Andrew David

Senior Backend Engineer with 5+ years in Python (FastAPI, Django, Celery) and Go, specializing in distributed systems, black-box functional testing, and reproducible Docker environments.

Track record: 80% operational overhead reduction, 99.5% uptime, 60% API performance improvement. Proficient with modern Python tooling and LLM-assisted development (Claude Code, Roo Code); comfortable reading C/C++/Rust/Go for migration and testing tasks.

Software Engineer - Clear Codes

(2025-01)

• Building scalable backend systems using Python/Django for enterprise clients (Airtel Nigeria, Glovo), serving thousands of concurrent users with strict SLA requirements
• Developed comprehensive HR Management System with automated leave request workflows, manager approval hierarchies, and real-time leave balance tracking for enterprise workforce management

Lead Backend Developer - Looprail

(2025-01)

• Architected microservices backend using Python, FastAPI, Redis, PostgreSQL for scalable financial transaction processing with high cohesion and loose coupling
• Built JWT authentication with Redis session management and implemented distributed locking for concurrent financial transactions
• Designed PII protection layer with encryption (at rest/in transit) and hashing for regulatory compliance and security by design

Software Engineer - emperorsixpacks

(2021-01)

• Developed a Payslip Management System for the Federal Medical Centre, Abuja (fmcabuja.gov.ng), serving 200+ staff members and dramatically reducing HR administrative overhead
• Engineered solutions for SQLite database race conditions under cost constraints by implementing Write-Ahead Logging (WAL) mode, achieving near-zero downtime over 12+ months of continuous operation
• Built a Project Information Management System (PIMS) enabling hierarchical document review workflows for HODs, unit managers, and staff, with sequential approval chains and inline commenting
• Built starknode-kit: production-grade Go CLI managing distributed Starknet node infrastructure (The Buidl Grid), achieving 80% reduction in operator setup time and 99.5%+ uptime

Lead Backend Developer - DMPSIMPS

(2023-11 - 2024-01)

• Architected secure REST APIs with JWT authentication, Redis session management, and RBAC for multi-tenant financial applications handling PII (BVN, NIN)
• Transformed deployment pipeline with Docker and CI/CD (GitHub Actions), reducing deployment time from 4 hours to 8 minutes with zero failures
• Led 4-developer team through code reviews and architecture patterns, improving code quality by 35% and making independent technical decisions on database schema, API contracts, and system architecture

Python Developer - KAEDCO

(2023-08 - 2024-01)

• Built custom Odoo ERP modules automating workflows (65% reduction in manual processing) and NLP sentiment analysis processing 1000+ daily customer feedback entries
• Implemented pytest unit testing suite (40% production bug reduction) and optimized PostgreSQL queries for 50% faster report generation

BEng - Mechatronics Engineering - Air Force Institute of Technology (AFIT)