We’re looking for a senior frontend engineer to maintain and improve our JavaScript agents (FingerprintJS and the browser SDK of Fingerprint Pro). This position doesn’t imply making user interfaces, it implies working with browser and server APIs. JavaScript agents are projects made by developers for developers with love.
Examples of Projects you may work on:
- Design, document and implement new features of the JavaScript agents
- Conduct experiments with the agents
- Use native browser JavaScript APIs (we use few third-party libraries in runtime)
- Push TypeScript and other tools to their limit
- Contribute to an OSS project with 17K+ stars and 23B+ monthly usages
- Optimize the code (both size and performance)
- Write unit tests for their code and check it manually
- Work with engineers who develop the backend for the SDK
- Make Node.js scripts that help build, test and update the agents
Requirements:
- Strong TypeScript knowledge
- Experience of writing asynchronous code with parallel execution
- Being comfortable working with browser APIs (DOM, AJAX, page lifecycle events, etc.)
- General understanding of the HTTP protocol and web security
- Jasmine, Jest or a similar test framework
- Passion for writing ideal code
- High level of personal ownership and autonomy, which requires experience working without clearly defined requirements
- Good English for verbal and written communications inside the company
An ideal candidate will also have:
- Experience with Rollup
- Experience configuring GitHub Actions
- Deep knowledge of browser JavaScript APIs
- Browser automation experience
- Experience with Open API
- Historical record of open source contributions
- Experience with technical writing
- Willing to learn something new
Our stack:
- Backend: TypeScript, Node, Express.
- Frontend: TypeScript, React, Storybook.
- AWS (Elastic Beanstalk, RDS/Aurora, SQS)
- Netlify/CloudFront.
- PostgreSQL.