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Tonic Technologies
Senior Backend Engineer (Node.js)
Remote · Lagos, Nigeria · Full time · Senior level
About the role
Build and maintain backend systems powering fintech products for users in Nigeria and Ghana. Ensure reliability and accuracy in payment and wallet services.
What you’ll do
• Build and maintain backend systems for consumer and partner apps. • Design clean APIs and optimize query performance. • Trace and fix webhook and payment issues. • Own critical flows like payments, wallet funding, and withdrawals. • Deploy, monitor, and maintain production services.
What you’ll bring
• 6+ years building backend systems in Node.js and TypeScript. • Understand idempotency, retries, race conditions, transactions. • Experience integrating third-party APIs and handling failures. • Care about logs, alerts, metrics, and incident response. • Treat security and customer data with high priority.
Life at Tonic Technologies
Fully remote Nigeria-based role with HMO, annual leave, work equipment, and learning budget. Work impacts over a million users.
About Tonic Technologies
Tonic Technologies is a fintech startup providing virtual and professional payment solutions for web and mobile users in Nigeria and Ghana.