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Sylvain Nana ElongSN

Sylvain Nana Elong

Java/Angular Developer

€450/day
Paris, FR
3-7 years

Average response time: 1 hour

Freelancer profile translated to English.
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About Sylvain

Java/Angular Full Stack Developer - Expert in Web Applications
Looking for an experienced developer to bring your web project to life or urgently resolve a technical issue? I can help you efficiently and pragmatically.

How I can help you :
I develop robust and performant web applications, from design to production. Whether you need to create a new feature, fix critical bugs, or modernize your existing application, I intervene quickly with proven solutions.

My technical expertise :
Backend: Java, Spring Boot, REST API, PostgreSQL
Frontend: Angular, TypeScript, modern and responsive interfaces

What sets me apart :
I don't just code - I understand your business challenges. With experience in application development (booking management, business platforms), I know how to translate your needs into concrete and sustainable technical solutions.
My approach: clean, documented, maintainable code. No over-engineering, just what's needed to make it work perfectly.

Types of projects I handle :
→ Development of new features (authentication, payments, dashboards)
→ Bug fixes and performance optimizations
→ Technical migrations and version upgrades
→ Integration of APIs and third-party services
→ Code audits and architecture recommendations
→ Development of complete web applications (SaaS, management platforms)

My availability :
Flexible for one-off evening and weekend projects. Quick intervention for emergencies. Clear and regular communication on progress.

Let's discuss your project - I will propose a solution tailored to your time and budget constraints.
  • French

    Native or bilingual

Remote only
Primarily works remotely

Experience

  • Sopra Steria,
    Fullstack Developer
    January 2023 - Today (3 years and 5 months)
    Paris, France
    Ensure the evolving TMA of the Schengen FR system within the NSIS team. Anomaly correction. Realization of evolutions. Participate in the build of an application for tracking application batches. Realization of interfaces. Implementation of APIs.
    –Languages used: Java, OpenApi, html, CSS, Javascript, Typescript –Framework: Springboot, Angular –RDBMS: Oracle, PostgresSql
    PostgreSQL Angular Java Spring Boot API REST
  • KREATiS
    Front-end Developer
    December 2020 - July 2021 (7 months)
    Lyon, France
    Redesign of the company's showcase website, application website, and intranet. Analysis of the existing. Creation of web pages. Creation of the API.
    –Languages used: HTML, CSS, JavaScript –Framework: CodeIgniter –RDBMS: MySql –Server: OVH, Xampp
    Angular SQL API HTML5 CSS3
  • ALTRAN,
    Fullstack Developer
    March 2020 - September 2020 (6 months)
    Paris, France
    Design of a hybrid query engine. Proposal of a document and graph type data model. Design of the hybrid query engine.
    –Languages used: JAVAEE, Maven –Framework: Spring, Swing –RDBMS: PostgreSql, MongoDB, Neo4j –Server: Tomcat 8.5
    PostgreSQL JAVA/JEE; MongoDB Neo4j Apache Tomcat

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Education

  • Specialized Engineering Degree
    3IL GROUPE
    2022
    Cycle ingénieur spécialisation
  • IUC
    2017

Skill set

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