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Haydar Cem DûmanHC

Haydar Cem Dûman

Fullstack Developer Go/TypeScript - web, mobile

€600/day
Liège, BE
15+ years

Average response time: 1 hour

Freelancer profile translated to English.
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About Haydar Cem

Independent full-stack developer, I support companies and agencies throughout the entire cycle: architecture design, web and mobile development, deployment, and maintenance.

Since 2019, I have been managing several long-term projects for clients in e-commerce, automotive, import-export, and services – from developing web platforms and mobile applications to designing APIs and cloud infrastructures. Before that, nearly ten years of experience in employment on various development projects.

My main stack: Go, TypeScript, and PHP on the backend; React, Svelte, React Native, and Flutter on the front and mobile; PostgreSQL, Elasticsearch, Docker, and GCP for data and infrastructure.

Specifically, what I solve for my clients:

- Develop a web or mobile application from scratch, or take over and stabilize an existing project.
- Design and integrate robust APIs between multiple systems.
- Debug and optimize complex e-commerce platforms (especially multilingual PrestaShop).
- Set up a clean, containerized, and automated cloud infrastructure.

Versatile and autonomous, I integrate just as well as a reinforcement to a team as in full project management. Available for staff-counseling or fixed-price missions, remotely or in Belgium.
  • French

    Native or bilingual

  • Kurdish

    Native or bilingual

  • Turkish

    Native or bilingual

  • English

    Conversational

Can work on-site
Liège (up to 50km)

Experience

  • AutoTuner
    Developer
    June 2023 - April 2026 (2 years and 10 months)
    - Participation in the development and architecture of v2 in Go and TypeScript
    - Development of a front-office in Svelte
    - Contribution to the React Native mobile application
    - Execution of POCs; development of a hashing library in TypeScript.
    Svelte Google Cloud Platform React Native GO
  • La Cité des Nuages
    Developer
    March 2020 - April 2026 (6 years and 1 month)
    1410 Waterloo, Belgium
    - Creation and technical management of the e-commerce platform
    - Advanced pre-order system, compliant with legal and accounting requirements.
    - Synchronization with accounting software.
    - Optimized search and catalog with Elasticsearch.
  • Aroneus
    Freelance Developer
    July 2019 - Today (7 years and 1 month)
    Verviers, LG, Belgium
    - Driver and truck scheduling system with real-time geolocation (Svelte), automatic SMS sending, and e-commerce development.
    - PHP e-commerce coupled with a merchandise management tool, with an advanced matching system covering over 17,000 vehicles.
    - React library for graphical binary visualization.
    Google Cloud Platform TypeScript GO PHP

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