We’re seeking a Web SDK Developer to lead the development of a reliable, scalable, and user-friendly JavaScript SDK used by customers worldwide.
Key Responsibilities:
- 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.
What will set you apart?
- Experience with mobile SDK development (iOS, Android) or cross-platform frameworks (React Native, Flutter) is a bonus. (remove??? - could frighten potential candidates)
- Knowledge of web analytics, tracking technologies, identity management, and data privacy regulations (GDPR, CCPA).
Not checking all of the above boxes, but still feeling strong about a career in software development?
We want to hear from you anyway!
Benefits
What We Offer:
- 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.
Top Skills
What We Do
Acoustic is a global marketing and customer engagement provider delivering solutions that give brands a deeper understanding of their customers and the ability to act in the moments that matter. Our mission is to help brands build closer customer connections through data-driven visibility and personalized engagement. We know that marketers need powerful solutions that enable them to transform how their brand connects with customers — not tools that limit their potential and complicate their day-to-day. Our solutions are purpose-built to enable marketers to build, scale, and optimize customer experiences throughout the customer lifecycle.
We have approximately 650 employees around the globe, allowing us to maintain a local presence with a global footprint. With 25+ years of MarTech experience, our team of trusted experts is focused on helping brands across industries exceed expectations and build meaningful, lasting customer relationships.
Why Work With Us
We’re not only building our company’s future but the future of an industry. That’s why our values — team and passion, trust and security, rapid innovation, customer delight, and respect for all people — guide everything we do. Join our collaborative, global team that’s dedicated to helping brands deliver exceptional customer experiences.
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