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Olusola Ojewunmi

@olusolaojewunmi

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I build reliable fintech, wallet, and SaaS backends with PHP and PostgreSQL.

Nigeria

Message

What I'm looking for

I'm looking to lead or build reliable financial, payments, and multi-tenant SaaS systems, with room to strengthen engineering quality, mentor teams, and deliver clean, maintainable backend platforms in remote environments.

I've led engineering for Send24, CLRD, and Residifi at NQB8 Limited, building products ranging from a dual-ledger wallet handling around 5,000 daily transactions to a multi-tenant residential management system.

For Send24, I designed financial workflows, invoicing, reporting, VAT calculation, and PostgreSQL safeguards that support zero-fault reconciliation and double-entry accounting. I also built CLRD as a microservice-based government logistics platform using RabbitMQ and developed Fufila's logistics API with Uber H3 routing.

As a consultant with Squadio on Gathern, I engineered OTA availability and pricing integrations, reducing booking failures by roughly 15% and pricing conflicts by 25%. I work across Laravel, Yii2, MongoDB, gRPC, queues, and distributed services handling over 200,000 daily requests.

I'm committed to clean, testable systems and stronger engineering teams through code reviews, pair programming, static analysis, and Agile delivery practices.

Experience

Work history, roles, and key accomplishments

Current

Independent Technical Consultant (B2B)

Current

Squadio

Jan 2025 - Present (1 year 8 months)

Engineered the OTA integration layer, focusing on unit availability and pricing orchestration. Introduced Spatie Laravel Data DTOs to handle concurrent pricing checks and refactored data aggregators, reducing booking failure rates by roughly 15%.