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Charles EssienCE

Charles Essien

Full Stack Developer

€500/day
Mainz, DE
8-15 years

Average response time: 1 hour

About Charles

I'm a Full Stack Developer with a strong focus on backend development, bringing over 5 years of hands-on experience in building scalable, secure, and high-performing systems. My primary expertise lies in Java Spring Boot and C# (.NET Core), where I've designed and implemented robust APIs, microservices, and backend architectures for various domains including fintech, healthcare, and e-commerce.

I also work with Flutter to create seamless cross-platform mobile apps, ensuring clean integration between front-end interfaces and backend systems. From setting up clean RESTful APIs to deploying containerized applications with Docker and Kubernetes, I focus on performance, reliability, and maintainability.

I'm skilled in working with SQL/NoSQL databases, cloud platforms (AWS, Azure), and CI/CD pipelines. I approach every project with a deep commitment to clean code, best practices, and transparent communication.

Whether you need to upgrade a legacy system, design a new architecture from scratch, or build a mobile app with solid backend support, I can deliver high-quality results, on time and within scope.

Let's build something reliable and future-proof.

  • English

    Native or bilingual

  • German

    Conversational

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

Experience

  • DC SMARTER
    Backend Developer
    DIGITAL AND IT
    January 2025 - Today (1 year and 5 months)
    • Leading the migration of Unity-based apps to Flutter, focusing on Augmented Reality (AR) integration.
    • Conducting research to implement AR features for enhanced user experience.
    • Collaborating with cross-functional teams to build scalable backend services.
    • Working with Flutter and AR libraries to create interactive mobile apps.
    Python JavaScript Microsoft Azure Java
  • 4 Rivers GmbH
    Full Stack Developer
    January 2023 - January 2024 (1 year)
    • Developed responsive web and mobile applications using C#, Flutter, and Angular.
    • Built and maintained RESTful APIs for frontend-backend communication.
    • Used C# for backend logic and integrated it with Flutter for mobile app development.
    • Designed and implemented microservices architecture for improved scalability and maintainability.
  • Livv GmbH
    Flutter Developer / Backend Java Engineer
    January 2022 - January 2023 (1 year)
    • Worked as a Flutter Developer and Backend Java Engineer on mobile and web applications.
    • Designed high-quality, scalable mobile apps with Flutter.
    • Built backend services using Java and Spring Boot, enabling seamless communication between backend and mobile apps.
    • Optimized backend systems for performance and scalability.

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Education

  • Bachelor of Science in Computer Science
    Cross River University of Technology
    2017
    Bachelor's Degree in Computer Science

Skill set

Categories