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Olaitan Olanrewaju

@olaitanolanrewaju

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I build scalable backend platforms, APIs, and microservices for financial, government, and web products.

Nigeria

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What I'm looking for

I'm looking to collaborate with new minds on impactful products where I can build scalable systems, keep learning, grow as a technical leader, and help others grow.

I'm building scalable backend platforms and APIs at EMPLE Life Assurance Limited, where I developed a SaaS platform from the ground up using a microservice-based architecture. I also manage deployments, CI/CD, Docker, Kubernetes, monitoring, and logging across services.

At Eco Online Global, I collaborate across teams to design and maintain web applications, review code, implement authentication, and build secure databases. I've also led backend developers on the Enugu e-governance portal, delivering APIs, payment gateway integrations, and services for government ministries.

My project work includes backend solutions for Squarebox's crypto trading and digital asset platform, covering trading, wallets, deposits, withdrawals, and financial-provider integrations. I've built services for banking, e-learning, music streaming, applicant management, blockchain applications, and Discord message archiving.

I work across Node.js, Express.js, NestJS, TypeScript, MongoDB, PostgreSQL, React, and REST and GraphQL APIs. I value collaboration, clean maintainable code, learning, and helping others grow.

Experience

Work history, roles, and key accomplishments

Current

Senior Backend Developer

Current

EMPLE Life Assurance Limited

May 2025 - Present (1 year 4 months)

Designed and developed a SaaS platform with scalable microservice architecture. Built and maintained an API portal, authored API documentation, and managed microservice infrastructure including CI/CD, Docker, and Kubernetes.

Microservices Docker Kubernetes CI CD API Development API Documentation Monitoring Logging SaaS

Current

Technical Lead/Solution Architect

Current

Eco Online Global

Jun 2023 - Present (3 years 3 months)

Collaborated with cross-functional teams to design, develop, and maintain web applications. Implemented authentication and security measures, developed databases, and participated in code reviews.

ExpressJS MongoDB Authentication Security Code Review Database Management Responsive Design

Fullstack Developer

Doheney Services

Nov 2023 - Jun 2024 (7 months)

Worked on both front-end and back-end of web applications, creating responsive designs and implementing authentication, data storage, and security best practices. Conducted end-to-end testing and optimized databases.

React Next.js MUI Tailwind ExpressJS MongoDB NestJS Git SQL NoSQL Unit Testing Integration Testing Security Database Design

Senior Backend Engineer

Enugu State Tech Hub

Jul 2023 - Aug 2023 (1 month)

Oversaw backend developers in building the Enugu e-governance portal. Developed robust backend APIs, integrated payment gateways, and implemented authentication and security measures.

ExpressJS MongoDB API Development Payment Gateway Integration Authentication Security Code Review

Software Engineer

HTMLFoods

Feb 2023 - Jun 2023 (4 months)

Worked on backend projects using NodeJS and Express, handled database management with MongoDB, and wrote optimized reusable code. Used JIRA and Github for bug tracking and issue management.

NodeJS ExpressJS MongoDB Jira GitHub API Development Testing

Trade Services Office (Export)

Zenith Bank PLC

Dec 2021 - Aug 2022 (8 months)

Facilitated NXPs for customers, maintained transaction records, and prepared export proceeds reports for the Central Bank of Nigeria. Processed NESS and Export Levy payments and monitored repatriation of NXP proceeds.

HTML CSS JavaScript Export Documentation Regulatory Reporting Reconciliations