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johnson Eyo

@johnsoneyo

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Experienced Java Developer with over 11 years in software development.

Germany

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What I'm looking for

I am looking for a role that challenges my skills and fosters growth in a collaborative environment.

I am a Java Developer with over 11 years of programming and software development experience, dedicated to delivering cost-effective technology solutions that meet challenging business demands. My journey has equipped me with a deep understanding of design patterns, data structures, and big data technologies, which I leverage to create robust applications.

In my recent role as a Senior Java Architect at Mitigant GmbH, I collaborated with teams to architect and build a vulnerability management system integrated with cloud service providers. My contributions included designing microservice architectures and developing Angular SPA components, all while ensuring high code quality through rigorous unit testing.

Throughout my career, I have consistently focused on improving system performance and user experience. I have successfully refactored legacy systems, developed predictive algorithms, and integrated various microservices, all while adhering to best practices in software engineering. I am passionate about continuous learning and thrive in agile environments where I can contribute to innovative projects.

Experience

Work history, roles, and key accomplishments

Senior Java Architect

Mitigant GmbH

Aug 2020 - May 2025 (4 years 9 months)

Collaborated with Senior Java/Kotlin Developers to architect and build a vulnerability management system integrated with cloud service providers (AWS, Azure, Red Hat OpenShift, Kubernetes Hybrid Cloud, Exoscale) to generate security posture data. Integrated the vulnerability system as an AWS partner in the AWS Marketplace. Designed microservice architectures to support faster vulnerability scans u

Java Kotlin AWS Azure Kubernetes Microservices RabbitMQ Spring Boot PostgreSQL Angular TypeScript

Senior Java Developer

Melita

Jun 2019 - Jun 2020 (1 year)

Extracted billing API microservice and exposed REST API from an existing Spring Boot application, then refactored integration to Amdocs facade using OpenFeign. Extended IOT (Internet of Things) back office application to aggregate new services. Ensured to write tests up to 85% coverage for all projects with testing frameworks such as Mockito and Hamcrest.

Java Spring Boot REST APIs OpenFeign IoT Mockito Hamcrest Microservices STOMP

Senior Java Developer

Crown Interactive Software

Apr 2017 - May 2019 (2 years 1 month)

Developed a predictive algorithm to determine energy consumption tolerance interval with a confidence level of 25% in a Spring Boot Energy management control microservice. Designed and developed Customer IR (Information Retrieval) search engine using Porter's stem algorithm. Refactored a legacy Java EE Issue tracking System to conform to design principles such as DRY and SOLID, and also the DAO la

Java Spring Boot Microservices Algorithms Java EE Design Patterns Apache POI Netty

Full Stack Developer

Misys (USL)

Sep 2015 - Mar 2017 (1 year 6 months)

Developed a multi-migration tool for batch processing between CSV, XLSX, and databases using the Spring Batch framework, dynamic proxies, and reflection. Led a team in replicating a Red Hat production server in the form of a UAT (User Acceptance Test) and Disaster Recovery server for a regional product customer overseas. Configured Spring Bridge XML config files to connect between a Spring library

Java XML Java EE Batch Processing UAT Disaster Recovery

Java Developer

Crown Interactive Software

Jan 2014 - Aug 2015 (1 year 7 months)

Developed a work order management product using Activiti BPM core to manage the life-cycle of issues. Developed RESTful API for Big Games Integration. Integrated Infonova BSS/OSS to back office applications and Betware games.

Java Activiti RESTful APIs Infonova BSS OSS

Java Developer / System Integrator

Zenith Bank

Oct 2013 - Jan 2014 (3 months)

Extended existing mobile top-up product used by bank customers and provided by Telcos and PSP (payment service provider) systems. This involved integrating with various payment service provider systems to ensure seamless transactions.

Java System Integration Mobile Top Up Payment Systems

Education

Degrees, certifications, and relevant coursework

Estam University

B.sc, Computer Science

Studied Computer Science at Estam University, focusing on core principles and applications. Completed the program in 2014, gaining foundational knowledge in the field.