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Malt Strategy
Calvin Iloki NgakossoCI

Calvin Iloki Ngakosso

Java Backend Developer

€250/day
Lisbonne, PT
8-15 years
Java Spring Boot
Apache Kafka
Oracle Database
SQL
Jakarta EE

Average response time: 1 hour

About Calvin

Highly experienced Java Developer with 6+ years in designing, developing, and optimizing robust, high
performing software solutions. Possesses creative thinking, strong problem-solving skills, and
technological fluency, underpinned by a solid mathematical background and sharp analytical and critical
thinking. Proficient in Java (including Spring Boot), Hibernate, and foundational front-end technologies.
Proven ability to thrive in challenging situations, self-directed, and capable of working effectively in highly
innovative and fast-paced environments. Demonstrates a strong work ethic and motivation, keen attention to
detail, excellent collaboration mindset, and high adaptability. Eager to leverage expertise in Microservices,
Cloud, and Container Architectures, SQL/NoSQL databases, and desirable knowledge in Domain-Driven Design,
Event Driven Architecture, Hexagonal Architecture, Reactive Programming, Automated Testing, and Security to
drive uncompromised engineering excellence and contribute to transformative projects.

  • French

    Native or bilingual

  • English

    Fluent

  • Portuguese

    Basic

Can work on-site
Lisbonne (up to 50km)

Experience

  • Aubay
    Java Backend Developer
    DIGITAL AND IT
    October 2025 - Today (10 months)
    Lisbon, Portugal
    Working in investment banking sector, my core responsibility is the development and maintenance of specific microservices. I ensure its stability, functionality, and continuous evolution by leveraging modern Java technologies and collaborative tools.
    ● Microservices Evolution: Development and maintenance of microservices using Java and Spring Boot, ensuring high availability and scalability for client-facing applications.
    ● Agile Excellence: Active participant in Agile/Scrum ceremonies, including Daily Sprints and PI planning; meticulously review user stories in Jira/Confluence to ensure alignment with business goals.
    ● Modern DevOps: Streamlined deployment cycles by managing CI/CD pipelines in GitLab and utilizing Argo CD for automated GitOps-based deployments.
    ● Data Persistence: Optimized data retrieval and storage using MongoDB and Spring Data MongoDB, handling complex data structures within a NoSQL environment.
    Java Spring Boot MongoDB Argo CD Kubernetes Apache Kafka
  • Port Autonome de Pointe-Noire
    Software Engineer
    LOGISTICS AND SUPPLY CHAIN
    February 2018 - October 2025 (7 years and 8 months)
    Pointe-Noire, Republic of the Congo
    ● System Architecture: Designed, implemented and maintained a multi-source Data Processing System to feed a reporting infrastructure, utilizing Java and Oracle Database to improve decision-making efficiency.
    ● Integration Services: Designed and developed a Cargo Manifest Web Service to facilitate data interchange with Customs Systems (SYDONIA), increasing data accuracy by 80%.
    ● Distributed Tracking: Built an AIS Data Fetching Application to enhance real-time vessel tracking, demonstrating expertise in handling concurrent data streams.
    ● Legacy Modernization: Modernized a legacy entreprise application, significantly accelerating business process times through robust error correction and data processing.
    ● Collaboration: Partnered with external service providers on software requirements and mentored end users on system administration.
    Oracle Database Java Spring Boot Jakarta EE RabbitMQ Analyse de données
  • High School Ceminace
    Java Full Stack Developer
    August 2022 - April 2023 (8 months)
    Pointe-Noire, Republic of the Congo
    • ● Full Cycle Development: Designed a comprehensive web application using Java 8, PrimeFaces, and Hibernate to automate student results, reducing processing time by 60%.
    • ● Quality Assurance: Applied TDD (Test-Driven Development) and automated testing principles to ensure software reliability and "Clean Code" standards.
Check out Calvin's experience

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Education

  • Master's Degree
    University Cheikh Anta Diop
    2015
    Master's Degree
  • Bachelor's Degree
    University Cheikh Anta Diop
    2012
    Bachelor's Degree

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