I am a dedicated Java Developer with extensive hands-on experience in secure payment and wallet systems within the financial sector. My expertise spans building scalable RESTful APIs and microservices with Spring Boot, managing Oracle databases with advanced query optimization, and integrating Kafka for real-time data streaming. I specialize in delivering robust backend solutions tailored to banking applications and financial services. I thrive in remote team environments, having contributed to various projects including restaurant management systems, event registries, and financial platforms. Coupled with skills in React for frontend integration, cloud deployment, and thorough testing, I ensure end-to-end project success from conception through to deployment and user acceptance testing.…

Oloruntobi Ajayi

I am a dedicated Java Developer with extensive hands-on experience in secure payment and wallet systems within the financial sector. My expertise spans building scalable RESTful APIs and microservices with Spring Boot, managing Oracle databases with advanced query optimization, and integrating Kafka for real-time data streaming. I specialize in delivering robust backend solutions tailored to banking applications and financial services. I thrive in remote team environments, having contributed to various projects including restaurant management systems, event registries, and financial platforms. Coupled with skills in React for frontend integration, cloud deployment, and thorough testing, I ensure end-to-end project success from conception through to deployment and user acceptance testing.…

Available to hire

I am a dedicated Java Developer with extensive hands-on experience in secure payment and wallet systems within the financial sector. My expertise spans building scalable RESTful APIs and microservices with Spring Boot, managing Oracle databases with advanced query optimization, and integrating Kafka for real-time data streaming. I specialize in delivering robust backend solutions tailored to banking applications and financial services.

I thrive in remote team environments, having contributed to various projects including restaurant management systems, event registries, and financial platforms. Coupled with skills in React for frontend integration, cloud deployment, and thorough testing, I ensure end-to-end project success from conception through to deployment and user acceptance testing.

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Skills

Experience Level

Java
Expert
Spring
Expert
PostgreSQL
Expert
SQL
Expert
GitHub
Expert
JavaScript
Expert
Docker
Intermediate
AWS
Intermediate

Language

Work Experience

Software Engineer (Java & Springboot) at Consolidated Hallmark Holdings PLC
March 1, 2025 - Present
Implemented wallet, OTP/PIN, and billing & payments systems, enhancing seamless financial transactions with banking domain experience. Designed a Work Breakdown Structure (WBS) for efficient project timeline and dependency management. Developed RESTful APIs for wallet creation, transaction processing, and authentication using core Java features. Engineered OTP/PIN Authentication microservices for increased security and integrated Payment Gateway for real-time billing. Conducted comprehensive testing including Unit, Integration, and User Acceptance Testing (UAT) before deploying to production to ensure system stability and performance.
Backend Developer (Java, Springboot & React) at Orchestra Business Solutions
January 1, 2024 - Present
Led development of a restaurant management system incorporating backend and frontend technologies using Java, Spring Boot, React, and TypeScript. Maintained and optimized RESTful APIs handling data for menus, orders, and customer profiles. Implemented state management using Redux for efficient frontend data flow and enhanced user interactions. Performed backend testing with JUnit and frontend testing with React Testing Library. Authored detailed project documentation to facilitate handover and adoption.
Backend Developer (Java, Spring Boot) at Footprint Mentorship
October 1, 2024 - Present
Developed the ContactUs feature which handles user inquiries via an API endpoint, sends email notifications, and archives data in CSV format. Authored Swagger documentation for API clarity and deployed the solution on Render. Utilized JavaMailSender for email processing and integrated CSV generation for systematic record keeping.
Backend Developer (Java, Springboot) at Moneta (Algomath)
December 31, 2023 - August 25, 2025
Contributed to the Kibou Registry project by creating and testing event management endpoints including scheduling capability. Managed full project lifecycle from requirements gathering to deployment using Render. Developed scalable high-performance Java backend applications. Collaborated cross-functionally to add new features and maintain code quality via reviews. Employed Git for version control and implemented microservices architecture for modularity.

Education

B.Sc Economics at Bowen University
January 11, 2030 - August 25, 2025

Qualifications

Product Management Certification
January 1, 2023 - August 25, 2025
Product Design Certification
January 1, 2023 - August 25, 2025

Industry Experience

Financial Services, Software & Internet, Travel & Hospitality, Retail, Education
    paper Quickbite Restaurant Application

    ● Led the development of a comprehensive restaurant management system, leveraging Java, Spring Boot, React,
    and TypeScript for seamless backend and frontend integration.
    ● Engineered and maintained RESTful APIs with Java and Spring Boot, delivering robust data handling and
    business logic for the QuickBite Restaurant application.
    ● Designed and optimized database schemas for managing restaurant menus, orders, and customer profiles,
    focusing on high performance and scalability.
    ● Implemented state management using Redux in the front end, ensuring efficient data flow and enhanced user
    interactions.
    ● Conductedrigorous testing using JUnit for backend unit testing and React Testing Library for frontend
    components, ensuring high-quality, bug-free code.
    ● Authoreddetailed project documentation including API guides, deployment instructions, and user manuals to
    facilitate smooth project handover and user adoption