"I don't just write software, I ship products with real intent." I am a Backend Developer specializing in Java and Spring Boot, with a focus on building high-availability systems and scalable API architectures. My experience ranges from leading distributed microservices teams during high-pressure delivery cycles to optimizing database performance for real-time applications. I prioritize system reliability (100% uptime), clean code, and performance tuning to deliver production-ready software that scales under load.
- Engineering at Emerj (Inventrix): Contributing to system architecture and API development for an SME inventory management platform.
- Deep Diving: Exploring location-based payment systems and Polyglot Persistence.
- The Problem: Solving photo-sharing friction at live events.
- The Impact: Served 100+ users at 3 live events with 500+ photos uploaded and zero downtime.
- Tech Highlight: Engineered a progressive authentication system that reduced onboarding friction by preserving guest activity until registration.
- Status: Live in production at mymemori.site.
- The Impact: Reduced page load latency by 40% and significantly improved user retention.
- Tech Highlight: Integrated Cloudinary for media optimization, ensuring a high-performance shopping experience.
- Live Site: ramyjooapparel.com
- The Venture: Launched a consumer food brand (Beans Flour) for the Nigerian market.
- Design & Strategy: Handled the full lifecycle from supply chain sourcing to designing "happy, exciting" visual identity and packaging.
- The Takeaway: Engineering is a tool to drive business goals.
- (Optional: Drag and drop a photo of your Avaprim packaging here)
- The Problem: Preventing inventory over-booking and double-reservations during peak periods.
- Tech Highlight: Implemented rigorous database locking strategies and a complex relational schema to track item availability and return deadlines.
- Stack: Java, Spring Boot, PostgreSQL.
- The Solution: A location-based React/Spring application designed to save lives in emergencies.
- Tech Highlight: Optimized geospatial queries to allow users to locate emergency services within a 5km radius instantly.
- The Takeaway: Solved the critical "time-to-care" problem through efficient database indexing and location logic.
| Category | Tools & Technologies |
|---|---|
| Languages | Java (Core/Advanced), SQL, Python. |
| Backend Frameworks | Spring Boot, Spring Security, Hibernate/JPA, REST APIs, Microservices Patterns. |
| Data & Cloud | PostgreSQL, MySQL, Docker, CI/CD Pipelines, Linux (Fedora User). |
| Specialized Skills | Geospatial Queries (MediMap), Custom JWT Security, System Architecture. |
- Optimization: Reduced page load latency by 40% for Ramy Joo Apparel through Cloudinary media optimization.
- Efficiency: Built an automated workflow at GreenTree Capital that reduced manual data entry by 30%.
- Leadership: Led a team of 4 at HNG Internship to design a distributed microservices system with 100% uptime.
- Integrity: Implemented database locking strategies in an Event Rental System to prevent double-reservations.
- LinkedIn: theophilus-adedayo
- WhatsApp Channel: Inside Tech & AI
- Email: [email protected]
- Location: Kaduna, Nigeria
When I'm not shipping code, I'm the Media Director of my church choir and a keyboardist. I also enjoy teaching, having served as a geography and math teacher and a Python co-instructor.