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Samuel Adebayo

@samueladebayo2

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Backend engineer at Mainstack who migrated 16 services and built billing for 10,000+ merchants.

Nigeria

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At Mainstack, I led a six-engineer team through a monolith-to-microservices migration, putting 16 services into production. I also built payment-critical systems, including subscription billing for 10,000+ merchants across Stripe and Paystack.

At FavesHQ, I architected and built a multi-tenant SaaS backend from MVP through production, including payments and appointment scheduling. I also built Creditsync, a personal fintech platform with a multi-chain wallet and integrations with six financial providers.

Experience

Work history, roles, and key accomplishments

Current

Lead Backend Engineer (Part-Time)

Current

FavesHQ

Jan 2023 - Present (3 years 9 months)

Architected and built the entire backend for a multi-tenant SaaS platform, including payments, appointments, and custom domain systems. Designed AWS architecture and CI/CD pipeline.

NestJS MongoDB Paystack AWS ACM Amazon Cloudfront GitHub Actions Elastic Beanstalk Microservices Webhooks Atomic Transactions CI CD

Lead Backend Engineer

Mainstack

Feb 2025 - Sep 2026 (1 year 7 months)

Led a six-engineer backend team through a monolith-to-microservices migration, defining service boundaries and API contracts. Built webhook infrastructure and mentored engineers to improve technical quality.

NodeJS TypeScript NestJS PostgreSQL Redis AWS Microservices Event Driven Architecture Webhooks Idempotency Reconciliations Docker GitHub Actions CircleCi Nginx

Backend Engineer

Mainstack

Mar 2023 - Feb 2025 (1 year 11 months)

Built event ticketing, subscription billing, point-of-sale, invoicing, affiliate, and export systems end-to-end. Handled high-concurrency ticket sales and processed recurring payments for 10,000+ merchants.

NodeJS TypeScript NestJS PostgreSQL Redis AWS Stripe Paystack Flutterwave Microservices Webhooks Idempotency Reconciliations Event Driven Architecture Docker GitHub Actions CircleCi Nginx

Lead Backend Engineer

HiFast

Nov 2021 - Jun 2022 (7 months)

Led backend and DevOps for a crypto trading platform, building core trading and fund-sharing features. Mentored junior engineers and managed microservices architecture.

NestJS AWS RabbitMQ Microservices KYC DevOps Mentorship

Education

Degrees, certifications, and relevant coursework

MIVA Open University

Master of Information Technology, Information Technology

Pursuing a Master of Information Technology with a dissertation on adaptive payment orchestration frameworks for cloud-based payment systems, expected to complete in 2026.