Available to hire
I am Lionel Kingue Eyoun, a passionate software engineer specialized in FullStack development using Java, Spring, and Angular. I have substantial experience working in Agile teams to deliver scalable and secure applications that meet business needs. I thrive on taking new challenges and continuously improving my skills, particularly in Cloud Computing and DevOps.
I am highly autonomous, proactive, and curious with a strong interest in emerging technologies. My goal is to contribute to impactful projects where I can apply my knowledge of microservices, cloud infrastructure, and modern frontend frameworks while collaborating effectively with cross-functional teams.
Experience Level
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Intermediate
Language
French
Fluent
English
Intermediate
Work Experience
JAVA Software Engineer at Publicis Africa Group (AG Partners)
January 1, 2022 - June 10, 2024Worked in a Scrum team on a web and mobile application to manage a savings product for diaspora clients. Responsibilities included agile development, team collaboration, software architecture, microservices design with Spring Cloud, frontend development using Angular 16, DAO layer design with Spring Data JPA and JDBC Template, Kafka implementation for asynchronous messaging, API documentation with OpenAPI, and comprehensive testing with JUnit and Mockito. Utilized DevOps tools such as Jenkins, Docker, Kubernetes, Terraform, and managed CI/CD pipelines.
Java Software Engineer at Interface SA
February 1, 2020 - January 31, 2022Contributed to the development of an international enterprise HR management platform. Activities involved working in an Agile Scrum team with CI/CD practices, asynchronous communication via Kafka, frontend development using Angular 12, designing RESTful APIs with Spring Boot, integrating Spring Data JPA and Hibernate, implementing security using Spring Security with OAuth2 and JWT, and automating deployments with Jenkins and Docker.
System Administrator & Web Developer at SWECOM PLC Douala
November 1, 2016 - January 31, 2020Led infrastructure and system administration including hardware and software requirements assessments, IT solution designs, system security, and resource management. Managed Active Directory, Microsoft Exchange Server, and Mikrotik configurations. Developed enterprise web applications with Java/J2EE handling backend and frontend duties, including payroll management system development. Authored detailed technical documentation and improved deployment efficiency through optimized workflows.
JAVA Software Engineer at Publicis Africa Group (AG Partners)
January 1, 2022 - June 13, 2024Worked on a web and mobile application for managing a diaspora savings product. Responsibilities included Agile team collaboration using Scrum, software architecture design with UML, microservices development with Spring Cloud including service discovery and load balancing, frontend development with Angular 16, database management with Spring Data JPA and Kafka messaging, and API documentation and testing using OpenAPI, JUnit, Mockito, and Test Containers.
Java Software Engineer at Interface SA
February 1, 2020 - January 31, 2022Contributed to an international HR management platform with responsibilities in Agile development and CI/CD practices, Kafka asynchronous communication, frontend Angular 12 UI development, backend Spring Boot RESTful services, security implementation with OAuth2 and JWT, and automation using Jenkins and Docker for continuous integration and deployment.
System Administrator & Web Developer at SWECOM PLC Douala
November 1, 2016 - January 31, 2020Led infrastructure and system administration, assessed hardware/software needs, managed Active Directory, Microsoft Exchange, and Mikrotik network configurations. Led full-stack web application development including payroll management system, ensured system security, produced technical documentation, and optimized processes for deployment efficiency using Java/J2EE and frontend technologies.
Java Software Engineer at Publicis Africa Group (AG Partners)
January 1, 2022 - PresentWorked as part of a Scrum team developing a web and mobile application for managing savings products targeting the diaspora. Responsibilities included agile team collaboration, sprint planning, and backlog management using Jira and Confluence. Designed scalable and secure software architectures with UML modeling. Developed microservices with Spring Cloud components like Eureka, LoadBalancer, and Spring Cloud Gateway. Developed the frontend using Angular 16, built reusable UI components, and worked closely with UX/UI designers. Managed persistence using Spring Data JPA and JDBC Template, and implemented asynchronous messaging with Kafka. Ensured API documentation via OpenAPI and wrote comprehensive unit and integration test suites.
Java Software Engineer at Interface SA
January 1, 2022 - August 20, 2025Contributed to an international enterprise HR management platform within an Agile Scrum environment focusing on CI/CD practices. Implemented event-driven architecture using Kafka to manage asynchronous microservices communication. Developed responsive user interfaces with Angular 12 and modular component design for maintainability and testability. Created backend RESTful APIs leveraging Spring Boot, Spring Data JPA, and Hibernate, adhering to security best practices with Spring Security OAuth2 and JWT authentication. Automated builds and deployments using Jenkins and Docker. Participated actively in sprint ceremonies using Jira for task tracking.
System Administrator & Web Developer at SWECOM PLC
January 1, 2020 - August 20, 2025Managed infrastructure and systems including hardware and software assessment aligned with business needs, Active Directory, Microsoft Exchange Server, and Mikrotik network configurations. Developed multiple enterprise web applications including inventory management, real-time network monitoring, and payroll systems using Java/J2EE technologies. Led full-stack development efforts, focusing on scalable and secure web solutions. Authored technical documentation and optimized deployment processes to improve maintainability and efficiency.
Java Software Engineer at Publicis Africa Group (AG Partners)
January 1, 2022 - PresentDeveloped a web and mobile application for managing a savings product enabling diaspora savings accounts in their home country. Worked in an agile Scrum team with bi-weekly sprints and participated in sprint planning, backlog grooming, and retrospectives. Designed scalable, secure, and high-performance software architectures using UML diagrams. Developed microservices with Spring Cloud, including service registry, load balancing, circuit breakers, and API gateways. Built responsive front-end applications using Angular 16 in collaboration with UX/UI teams. Managed database design using Spring Data JPA and JMS with Kafka for asynchronous service communication. Documented REST APIs with OpenAPI and implemented unit and integration testing using JUnit, Mockito, and Test Containers.
Java Software Engineer at Interface SA
January 31, 2022 - August 20, 2025Contributed to the international enterprise HR management platform development in an agile Scrum environment with continuous integration and delivery (CI/CD). Implemented asynchronous communication using Kafka between microservices for robust integration. Developed responsive and modular UI components using Angular 12 and enhanced front-end maintainability. Designed and built RESTful APIs using Spring Boot with integration of Spring Data JPA and Hibernate for database management. Secured APIs with Spring Security including OAuth2 and JWT. Automated build and deployment pipelines using Jenkins and containerized applications with Docker.
System Administrator & Web Developer at SWECOM PLC Douala
January 31, 2020 - August 20, 2025Led analysis, design, and full-stack development of three key enterprise applications including Inventory Management, Real-time Network Monitoring, and Payroll Management systems. Managed IT infrastructure and system security involving Active Directory, Microsoft Exchange Server, and Mikrotik network configurations. Developed scalable, secure web solutions using Java/J2EE technologies. Authored technical documentation and optimized software deployment processes for improved efficiency and maintainability.
Java Software Engineer at Publicis Africa Group (AG Partners)
January 1, 2022 - PresentContributed as a Java Software Engineer in a Scrum team to develop a web and mobile application that manages a savings product for diaspora clients. Responsibilities included designing scalable, secure architectures; implementing microservices with Spring Boot, Spring Cloud, and Kafka; building frontend modules with Angular 16; ensuring API security with Spring Security and JWT; developing CI/CD pipelines using GitLab, Jenkins, and Docker; containerizing applications with Kubernetes; writing unit and integration tests; and documenting APIs with OpenAPI. Collaborated through sprint planning, daily stand-ups, and retrospectives using Jira and Confluence.
Java Software Engineer at Interface SA
January 31, 2022 - August 20, 2025Worked in an Agile Scrum team delivering an international enterprise HR management platform. Focus areas included backend development with Java 11, Spring Boot, Spring Cloud, and secure API implementation with OAuth2 and JWT. Utilized Kafka for asynchronous communication between microservices. Developed responsive frontend components using Angular 12. Automated the CI/CD pipeline with Jenkins and Docker. Participated actively in sprint planning, backlog grooming and daily stand-ups using Jira and GitLab.
System Administrator & Web Developer at SWECOM PLC Douala
January 31, 2020 - August 20, 2025Led the full-stack development of key web applications including inventory management, real-time network monitoring, and payroll systems using Java/J2EE technologies. Managed system infrastructure, security, and resource optimization. Administered Active Directory, Microsoft Exchange Server, and Mikrotik network configurations. Improved deployment processes with effective technical documentation and operational procedures contributing to enhanced maintainability and efficiency.
Education
Ingenieur de Conception en Informatique at Institut d’Ingénierie Informatique de Limoges en Afrique centrale
January 1, 2010 - December 31, 2013DEUG at Université de Yaoundé 1
January 1, 2005 - December 31, 2010Baccalauréat Scientifique at Lycée Général Leclerc
January 1, 2005 - December 31, 2005Ingénieur de Conception en Informatique at Institut d’Ingénierie Informatique de Limoges en Afrique centrale
January 1, 2010 - December 31, 2013DEUG at Université de Yaoundé 1
January 1, 2005 - December 31, 2010Baccalauréat Scientifique at Lycée Général Leclerc
January 1, 2005 - December 31, 2005Ingénieur de Conception en Informatique (Bac +5) at Institut d’Ingénierie Informatique de Limoges en Afrique centrale
January 1, 2010 - January 1, 2013DEUG (Bac+2) en Sciences Mathématiques at Université de Yaoundé 1 (Cameroun)
January 1, 2005 - January 1, 2010Baccalauréat Scientifique (BAC C) at Lycée Général Leclerc (Cameroun)
January 1, 2005 - January 1, 2005Ingénieur de Conception en Informatique (Bac +5) at Institut d’Ingénierie Informatique de Limoges en Afrique centrale
January 1, 2010 - January 1, 2013DEUG (BAC+2) En Sciences Mathématiques at Université de Yaoundé 1 (Cameroun)
January 1, 2005 - January 1, 2010Baccalauréat Scientifique (BAC C) at Lycée Général Leclerc (Cameroun)
January 1, 2005 - January 1, 2005Ingénieur de Conception en Informatique (Bac +5) at Institut d’Ingénierie Informatique de Limoges en Afrique centrale
January 1, 2010 - January 1, 2013DEUG (BAC+ 2) En Sciences Mathématiques at Université de Yaoundé 1 ( Cameroun )
January 1, 2005 - January 1, 2010Baccalauréat Scientifique (BAC C) at Lycée Général Leclerc ( Cameroun)
January 1, 2005 - January 1, 2005Qualifications
Industry Experience
Software & Internet, Financial Services, Professional Services, Telecommunications, Government
Experience Level
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Intermediate
Hire a Full Stack Developer
We have the best full stack developer experts on Twine. Hire a full stack developer in Douala today.