Acoustic

Web SDK Developer, JavaScript

Acoustic

full-time

Posted on:

Location Type: Hybrid

Location: Gdańsk • Poland

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Tech Stack

JavaScriptJestMochaTypeScriptWebpackYarn

About the role

  • Design, build, and maintain the Acoustic Connect Web SDK, enabling enterprise-grade customer engagement and behavioral analytics features for web applications.
  • Deliver high-quality, performant, and scalable SDK modules that integrate seamlessly with client websites and web applications across different browsers and environments.
  • Take ownership of the full SDK lifecycle: from architectural design to public documentation and ongoing developer support.
  • Continuously improve SDK codebase with best practices in modularity, testability, and maintainability.
  • Refactor or retire legacy code and modules, aligning the SDK with modern JavaScript/TypeScript best practices and long-term maintainability.
  • Proactively identify performance bottlenecks and lead improvements using browser profiling tools and web performance monitoring.

Requirements

  • Minimum 3-5 years of experience in JavaScript development.
  • Proven ability to develop concise and lightweight SDKs with excellent performance and minimal impact on page load times.
  • Deep understanding and experience with modern JavaScript (ES6+) and TypeScript.
  • Strong knowledge of browser APIs, DOM manipulation, event handling, and cross-browser compatibility.
  • Experience with build tools (Webpack, Rollup, Vite), package managers (npm, yarn), and module systems (CommonJS, ES modules, UMD).
  • Knowledge of web app lifecycle, memory management, and performance optimization techniques specific to browser environments.
  • Understanding of best practices for API versioning, backwards compatibility, and public SDK API design.
  • Experience with testing frameworks (Jest, Mocha) and ensuring high code coverage through unit and integration testing.
  • Keeping up to date with web ecosystem changes (new browser APIs, privacy changes like third-party cookie deprecation, security best practices) and applying them in SDK development.
Benefits
  • Direct impact on our product and three growth paths: Architect, Principal Software Engineer, or Manager.
  • Remote or hybrid work from our Gdansk office (up to you!)
  • Competitive benefits, including tax-deductible costs, MacBook Pro, medical and life insurance, meal allowance, and a Multisport card.
Applicant Tracking System Keywords

Tip: use these terms in your resume and cover letter to boost ATS matches.

Hard Skills & Tools
JavaScriptTypeScriptSDK developmentbrowser APIsDOM manipulationevent handlingperformance optimizationunit testingintegration testingAPI versioning
Soft Skills
ownershipproactive identificationleadershipcommunicationproblem-solvingattention to detailadaptabilitycollaborationcritical thinkingtime management