Topic
Backend Engineering
4 case studies tagged with Backend Engineering.
SaaS
Zero-Downtime Currency Migration for a Live Wallet System
0
Ledger rows modified
Migrated ~16,000 live user wallets from NGN to USD on a platform with 150,000+ transaction records — without touching the ledger, without data loss, and with a 15-minute maintenance window.
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Established web product
Migrating a Live Platform from Core PHP to Laravel Without Downtime
0
Data loss
Rewrote an established web product from a custom core PHP architecture to Laravel — with a backward-compatible database migration, dry-run validation, and a one-hour maintenance window cutover.
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SMS activation platform
Automated Expiry Detection for Virtual Numbers
~95%
Polling Reduction
Built an automated expiry detection and refund system for temporary virtual numbers using Redis sorted sets when the provider offered no webhook support.
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Avnac Studio
Boreas - Job Queue Architecture for Background Removal at Scale
<50ms
Upload response
Built a fast, stateless background-removal API that decouples image upload validation from expensive compute work using Redis queues and worker pools, keeping request latency under 200ms regardless of processing time.
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