JJJoy Joseph
@joyjoseph4
Java backend engineer building scalable, secure systems with Spring Boot and PostgreSQL.
NigeriaWhat I'm looking for
I am a Java backend engineer focused on building scalable, high-performance applications using Spring Boot, PostgreSQL, and Keycloak for secure identity and role-based access. I design clean, testable code following Hexagonal Architecture and integrate third-party APIs to deliver robust backend solutions.
At VentureCloud I implemented MOIC calculations, integrated Google Sign-in and SendGrid, and delivered investor-focused features. Previously at Enum Africa I developed a dynamic shortlisting system, a Reference Data API, and optimized search with Elasticsearch.
I also tutor beginner programmers part-time, mentoring students in Java, HTML, CSS, and block-based platforms, and I build personal projects such as a food-ordering backend and an ecommerce platform to continuously expand my technical expertise.
Experience
Work history, roles, and key accomplishments
Coding Tutor (Part Time)
Tresbontech Academy
Jun 2025 - Present (4 months)
Supported beginner learners in programming fundamentals and web basics, designing custom lesson plans and hands-on exercises to build confidence and deliverable projects using Java, HTML, and CSS.
Java Backend Engineer
VentureCloud
Feb 2025 - Present (8 months)
Designed and implemented MOIC calculation features and core backend services using Hexagonal Architecture, Spring Boot, PostgreSQL, and Keycloak; integrated Google Sign-in and SendGrid to improve authentication and notifications for investor workflows.
Java Backend Engineer
Enum Africa
Jul 2024 - Jan 2025 (6 months)
Developed a dynamic recruiter shortlisting system and a Reference Data API, leveraging Elasticsearch and Hexagonal Architecture to standardize data and optimize search performance.
Education
Degrees, certifications, and relevant coursework
Semicolon Africa
Diploma, Software Engineering
2023 - 2024
Completed a one-year Software Engineering diploma focused on backend development, web technologies, and practical project work.
Tech stack
Software and tools used professionally
Availability
Location
NigeriaAuthorized to work in
Job categories
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