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Tumininu Ojo

@tumininuojo

Software engineer at TACKSTRY building Subsassistant’s subscription management system, from architecture and APIs to payment processing.

United States

Message

At TACKSTRY, I led the architecture and backend design for Subsassistant, a subscription management tool for apps, services, and SaaS software. I built RESTful APIs and integrated payment processing, subscription management, and automated renewal reminders.

At APEK GROUP, I worked on Javat365’s Android and iOS apps. I implemented e-commerce and payment features, built real-time chat, and migrated the Android app to MVVM; the e-commerce implementation drove user adoption up by almost 500% on the Apple and Google Play Store.

I’ve also worked on backend and full-stack products including Boiboi, Pawhoo, and MakeMyWears. Across these projects, I developed authentication, payment workflows, and APIs, and deployed services using AWS, Docker, Kubernetes, and Terraform.

Experience

Work history, roles, and key accomplishments

Current

Fullstack Engineer

Current

Tackstry

Jan 2025 - Present (1 year 9 months)

Led system architecture and backend design for a subscription management tool. Implemented OAuth-based authentication, payment processing, and automated email reminders.

System Architecture OAuth Payment Processing REST APIs Subscription Management Email Automation

Software Engineer

Apek Group

Sep 2021 - Nov 2025 (4 years 2 months)

Migrated Android app to MVVM architecture and implemented e-commerce features that drove user adoption by nearly 500%. Built realtime chat, offline caching, and integrated video conferencing across Android and iOS.

Android iOS MVVM Jetpack Kotlin Swift Stripe Paystack WebSockets Room DB GRDB ConstraintLayout Video Conferencing Push Notifications Deep Linking

Fullstack Engineer

MakeMyWears

Apr 2025 - Jun 2025 (2 months)

Implemented OAuth 2.0 and JWT-based authentication, developed RESTful APIs for order management, and configured S3 storage for design assets. Built webhook handlers for payment processing with HMAC validation.

OAuth JWT REST APIs S3 CORS Webhooks HMAC NodeJS TypeScript

Backend Engineer

Useboiboi

Jan 2024 - Jan 2025 (1 year)

Led backend architecture and implemented OAuth 2.0 authentication, a wallet system, and webhook handlers for payment events. Designed RESTful APIs and role-based access control.

OAuth JWT Wallet Systems Webhooks HMAC REST APIs RBAC NodeJS TypeScript

Backend Engineer

Pawhoo

Feb 2024 - Aug 2024 (6 months)

Integrated OAuth 2.0 with Google Sign-In, implemented geocoding and reverse geocoding using Google Maps SDK, and engineered payment processing workflows. Designed RESTful APIs for pet listings and bookings.

OAuth Google Sign In Google Maps SDK geocoding Payment Processing REST APIs NodeJS