Senior Frontend Developer (JavaScript, Shopify)

Avomind

Cologne, North Rhine-Westphalia, Germany Hybrid permanent

Posted: May 4, 2026

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Quick Summary

Develop and implement complex A/B tests in live Shopify environments, take ownership of frontend development, mentor junior developers, and contribute to planning.

Required Skills

Shopify Frontend Development HTML CSS JavaScript Git jQuery QA

Job Description

We’re working with a data-driven e-commerce growth agency and they’re looking for a Senior Frontend Developer.

About the Company:

• Specialized in A/B testing and conversion rate optimization
• Focus on scaling Shopify-based e-commerce brands
• Culture built on: Ownership, Respect, High Standards, and Team Spirit

What You’ll Do

• Develop and implement complex A/B tests in live Shopify environments
• Take ownership of the frontend domain and technical decisions
• Mentor and support junior developers
• Provide accurate effort estimations and contribute to planning
• Ensure high QA standards across releases
• Communicate directly with clients on technical topics

Ideal Profile

• Proven Shopify experience (beyond basic landing pages)
• Confident in client-facing technical discussions
• Able to lead, mentor, and make decisions independently
• Proactive and comfortable in a fast-paced environment

Requirements:
• 4+ years experience in Frontend Development (Senior level)
• Strong skills in HTML, CSS, JavaScript
• Solid experience with Shopify (themes, sections, live environments)
• Working knowledge of jQuery and Git
• Experience delivering production-ready code for real clients
• Comfortable owning timelines and managing scope
• Interest in AI-assisted development (e.g. Copilot, Cursor)

Benefits:
• Flexible working model: Office, hybrid, or fully remote
• 30 days vacation + 3 additional regional holidays
• MacBook Pro + professional setup from day one
• Extras: Workations, team events, €30/month benefit voucher

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