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Chukwuma Onuh

@chukwumaonuh

Backend Engineer at SendQwik Pay building a live cross-border remittance platform, including FX quoting, multi-currency funding, and payouts.

Nigeria

Message

What I'm looking for

I’m open to remote full-time or contract roles, and to international relocation with visa sponsorship.

At SendQwik Pay, I built services for a live, FINTRAC-regulated cross-border remittance platform. My work includes FX quotes with transparent fees and locked rates, multi-currency wallet funding, and payouts to recipients’ bank accounts.

I also integrated Persona identity verification and built transfer notifications and the Circle rewards system. I designed services around multiple currency routes so the platform can add sending and receiving countries as it expands.

At Zedcrest Group, I architect and build microservices for a fintech mobile platform serving 600,000+ users. I build ASP.NET Core APIs processing 100,000+ transactions daily and maintain loan origination and eligibility systems.

At Zedcrest Group, I also implemented RabbitMQ-based event processing and improved query and API response times by up to 60% through SQL tuning and caching. I lead code reviews, guide architecture decisions, and mentor three backend engineers.

Experience

Work history, roles, and key accomplishments

Current

Backend Engineer (.NET)

Current

SendQwik Pay

Jan 2026 - Present (9 months)

Built FX quoting service, multi-currency wallet funding, payout flows, and Persona KYC integration for a FINTRAC-regulated cross-border remittance platform. Developed Circle rewards system and real-time transfer notifications.

ASP.NET Core C#RabbitMQ Personas KYC Multi Currency Wallets FX Quoting Payment Processing REST APIs Webhooks

Current

Senior Backend Engineer (.NET)

Current

Zedcrest Group

Sep 2023 - Present (3 years 1 month)

Architected microservices for a fintech platform serving 600,000+ users, processing 100,000+ daily transactions. Implemented event-driven processing with RabbitMQ, optimized SQL queries, and mentored 3 backend engineers.

ASP.NET Core C#Microservices RabbitMQ SQL SQL Server Caching Circuit Breakers Code Review Mentorship

Senior .NET Backend Engineer

Sterling Bank Plc

Sep 2022 - Aug 2023 (11 months)

Designed a central wallet service across multiple banking systems and channels. Built .NET Core services for real-time transaction processing and improved high-traffic services through SQL optimization, cutting response times by around 50%.

ASP.NET Core C#SQL Server SQL Optimization Wallet Service System KYC Payment Gateways REST APIs

Software Engineer

Software Business Solutions Consulting (SBSC)

Nov 2021 - Oct 2022 (11 months)

Built high-throughput REST APIs and microservices for digital banking products. Integrated identity verification, card tokenization, and transaction monitoring, reducing downtime incidents by 25%.

.NET Core C#REST APIs Microservices Identity Verification Card tokenization Transaction Monitoring Error Handling

Software Associate

Decagon

Mar 2021 - Nov 2021 (8 months)

Built ASP.NET Core and MVC applications, including an e-commerce platform, with React front ends and SQL Server, MongoDB, and Redis. Set up CI/CD with GitHub Actions and containerized apps with Docker.