Javascript Developer
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Job Description
Senior JavaScript Developer building scalable, high-performance frontend solutions for e-commerce platform. Collaborating with cross-functional teams across the entire software development life cycle.
Responsibilities:
- Implement scalable, modular, and high‑performance frontend solutions using React, NextJS, AstroJS and TypeScript with modern tooling following team architecture guidelines.
- Build features that handle real-time data updates, fast user interactions and complex state management, contributing to the team's performance and scalability goals.
- Work closely with product, design, quality and backend teams to deliver features with quality and speed.
- Write clean, maintainable code aligned with team coding standards and best practices.
- Contribute actively to the shared component library and design system, building reusable components consistent with established patterns.
- Support code reviews within the team, providing constructive and actionable feedback.
- Participate in incident response and contribute to root cause analysis for production issues.
- Be part of the on-call shift.
- Identify high-impact areas where AI reduces effort.
- Build repeatable prompting workflows for: Generating components aligned with the design system, Generating tests from stories/specs, Code review preparation, Performance analysis of components, Architectural reasoning (state boundaries, component splitting, folder structure), Intelligent debugging (trace render loops, race conditions, stale closures), Detecting anti-patterns in PRs before review.
Requirements:
- Solid experience (5+ years) in modern frontend development with React, TypeScript, and CSS.
- Strong understanding of React patterns, hooks, component lifecycle, and rendering behavior.
- Strong knowledge of state management tools (Redux Toolkit, Zustand, or similar), web performance, and testing practices.
- Working knowledge of web standards, accessibility basics (WCAG), and responsive design.
- Familiarity with SSR frameworks such as Next.js.
- Good knowledge for Express.js and node.js
- Websocket knowledge (socket.io)
- Svelte
- Previous experience building live data applications — e.g. financial trading or similar real-time environments.
- Understanding odds updates or real-time event tracking is a big plus.
- Comfortable working with CI/CD pipelines and automated testing practices (unit, integration).
- B2 English level (written and spoken).
- Ability to evaluate AI-generated output for architectural fit and code quality.
- Experience using AI for refactoring, not just code generation.
- Awareness of AI limitations and ability to critically review AI-generated code before integration.
Benefits:
- 22 days of annual leave
- 10 days of public/national holidays
- Health insurance options
- Access to online learning platforms
- On-site English classes in some countries, and more.
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