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Fatai Akeju

@fataiakeju

I build high-scale backend platforms for fintech, gaming, and e-commerce.

I build and scale distributed, multi-tenant backend systems across fintech, gaming, and e-commerce. My work spans Scala/Akka, Node.js/TypeScript, event-driven microservices, databases, and production support.

At Beamable, I worked on a multi-tenant platform handling approximately 9 billion API calls monthly with average execution time of 30 ms. I improved batch API execution time by approximately 48%, prevented 10-second timeouts, optimized MongoDB indexes, and used Locust load testing to guide scaling decisions.

At Nestcoin, I managed core credential services used by three products, including password management, TOTP/2FA, encryption, rate limiting, and OTP handling. I also worked on wallet, tournament, and compliance services, built tested APIs and OpenAPI specifications, and integrated backend applications with blockchain systems.

I've redesigned e-commerce backends, led payment-provider integrations and data migrations, and delivered finance products including PlanCrux, an offline-first personal finance app live on Google Play. Earlier, I reduced report-generation time by 50% for banking systems and built APIs, Android apps, and government collection platforms.

Experience

Work history, roles, and key accomplishments

Current

Independent Software Engineer

Current

PlanCrux

Mar 2026 - Present (6 months)

Designed and built an offline-first personal finance mobile app, including expense tracking, budgets, and a statement import pipeline. Shipped end-to-end with app store listing and support infrastructure.

React Native Expo SQLite TypeScript JavaScript Google Play Admob PAYE Calculation

Senior Back-End Engineer

Beamable

Feb 2024 - Dec 2025 (1 year 10 months)

Worked on a multi-tenant backend platform handling ~9 billion API calls per month. Implemented performance improvements, optimized MongoDB indexes, and conducted load testing.

Scala Akka MongoDB Locust Microservices Performance Optimization Load Testing

Senior Back-End Engineer

Nestcoin

Nov 2021 - Sep 2025 (3 years 10 months)

Developed applications using microservices architecture with event-driven and request-driven patterns. Managed core services including credentials, wallet, tournament, and compliance.

Microservices Event Driven Architecture Scala Akka OpenAPI SQL NoSQL Blockchain TOTP 2FA Rate limiting

Back-End Engineer (Lead)

Vendease

Aug 2021 - Nov 2021 (3 months)

Redesigned the backend for an e-commerce application using Express, PostgreSQL, Redis, and AWS. Implemented a dynamic role-access system and led data migration from MongoDB to PostgreSQL.

Express PostgreSQL Redis AWS MongoDB Data Migration Role Based Access Control Payment Integration

Back-End Engineer + Android

Hazon Technologies

Sep 2020 - Jul 2021 (10 months)

Developed APIs for mobile agents and web portal users in a healthcare subsidiary. Built an Android app for real-time multiplayer board games and managed a wellness device reading app.

API Development Android Kotlin Real time Multiplayer Game Development

Software Engineer

Cynergy Solutions

Jan 2018 - Aug 2020 (2 years 7 months)

Reduced report generation time by 50% by automating optimized SQL queries. Developed reporting applications for financial institutions and implemented merchant enrollment solutions.

ASP.NET Oracle DB SQL C#Data Migration Reporting Financial Systems