logo inner

Senior JavaScript Engineer

CompanyairSlate
LocationPoland
TypeRemote, Onsite
Sub
Software Engineer

About the Marketing Engine team:


The marketing team handles comprehensive 360º communication and comprises over 150 people. We manage all aspects in-house and operate a robust automation engine. Our combined monthly traffic across all brands exceeds 31 million. As a marketing team member, you'll play a crucial role in the upcoming phase of our brand's growth as we expand and introduce new products to the market.And now, we are looking for a Senior JavaScript Engineer who is prepared to contribute to the next chapter of our company's growth.

What you'll be working on:


  • Develop and deliver new product features from concept to release
  • Maintain, improve, and refactor existing functionality to ensure scalability and reliability
  • Continuously enhance product performance and user experience
  • Collaborate closely with Product and Design teams to iterate on ideas and transform prototypes into high-quality solutions
  • Optimize application performance, including load time and runtime efficiency
  • Partner with engineering teams across the organization to align on architecture and shared initiatives

What we expect from you:


  • 5+ years of professional experience building production-grade applications with TypeScript/JavaScript
  • Advanced experience with React, including modern rendering patterns (SSR, CSR, hydration, Server Components)
  • Hands-on experience with Next.js
  • Experience building and maintaining reusable component libraries and design systems, including Web Components
  • Solid experience developing Single-Page Applications and scalable frontend systems
  • Strong foundation in modern CSS/SCSS and utility-first styling approaches
  • Deep understanding of client-side architecture (state management, data synchronization, form handling, validation patterns)
  • Experience delivering performant, accessible (WCAG-compliant), and production-ready user interfaces
  • Ability to write maintainable, testable, and reliable code
  • Comfortable working in collaborative, Git-based environments
  • Takes ownership of work, proactively addresses dependencies, and supports team delivery
  • Demonstrates curiosity, continuous learning, and knowledge sharing

We may use artificial intelligence (AI) tools to support parts of the hiring process, such as reviewing applications, analyzing resumes, or assessing responses. These tools assist our recruitment team but do not replace human judgment. Final hiring decisions are ultimately made by humans. If you would like more information about how your data is processed, please contact us.apply for this job

Your tracker settings

We use cookies and similar methods to recognize visitors and remember their preferences. We also use them to measure ad campaign effectiveness, target ads and analyze site traffic. To learn more about these methods, including how to disable them, view our Cookie Policy or Privacy Policy.

By tapping `Accept`, you consent to the use of these methods by us and third parties. You can always change your tracker preferences by visiting our Cookie Policy.

logo innerThatStartupJob
Discover the best startup and their job positions, all in one place.
Copyright © 2025