Sigma Solutions


I am a freelance software developer based in France.


I offer software development services in the following areas:

  • Back-end services using Node.js and Typescript
  • Web UI development with React.js, Next.js, Redux.js, and TypeScript
  • Chrome extension development in JavaScript and TypeScript
  • Cross-platform desktop client development (Windows and macOS)


Examples of projects completed using Node.js, TypeScript, React.js, Next.js, Redux.js:

  •  SellerProtect  shield yourself from unscrupulous and dishonest buyers on eBay.
  •  PowerSniper  automatic last-second bidding for eBay auctions within your web browser.
  •  PowerSearcher  add extra search filters directly to your eBay search page.
  •  Mongomix  client GUI for MongoDB, browse and edit MongoDB databases made easy.

User privacy data for extensions


Please feel free to contact me