Senior JavaScript Developer

Contract Type : Freelance / B2B

Contract Length : 6 months (+ extensions)

Start Date : July 2025

Work Schedule : EU or UK candidates considered

Interview process : 2 Stage (Including live technical assessment)

This is a customer-facing, product-focused role where performance, responsiveness, and clean user experience are top priorities. You’ll contribute to both architectural decisions and hands-on development, collaborating closely with backend engineers and product teams.

Key Skills :

• Proven experience leading end-to-end development of complex web applications
• Strong understanding of API integration and frontend architecture

Bonus Skills :

• Experience working on customer-facing products (web and / or mobile)
• Skilled in integrating and managing API endpoints , including validation and error handling
• Ability to build scalable, reusable UI components and improve existing workflows
• Familiarity with cryptography principles (e.g., symmetric / asymmetric encryption)
• Knowledge of Web Workers and Service Workers

Tech Stack & Focus Areas :

• Frontend Development : Expertise in semantic HTML, CSS styling, and responsive design principles
• API Integration : Comfortable with request lifecycles, status code handling, and tools like AbortController
• Advanced Frontend Concepts : Practical experience with debouncing, memoization, error boundaries, unit testing, and mocking strategies