Nov 2025 — Present
Airvend
Lagos, Nigeria
Backend Engineer
Re-engineering consumer and business financial transaction platforms, including transaction recovery, financial accounting and migration of legacy data.
- Designed asynchronous Saga-based purchase orchestration with idempotency, external provider requery and compensating reversals.
- Replaced direct wallet mutations with double-entry journals, customer subledgers, general-ledger postings and auditable settlement workflows.
- Migrated 8,000+ customers and millions of historical transaction records using restart-safe batch imports and reconciliation.
- Optimized MySQL schemas and indexes, reducing previously slow queries to approximately 40 ms or less.
- Integrated banking, identity and value-added services; delivered redesigned B2C to production with B2B undergoing QA.