Senior Frontend Engineer (Reactjs/Nextjs - JTL Shop 6.0) - DC22

YOUR NEW ROLE
This role is for CODE LEAP's client company - JTL-Software
JTL-Software is one of Germany's leading providers of e-commerce and ERP solutions. More than 50,000 retailers rely on JTL every day to run their business. Our global development center in Vietnam is looking for talented people to build the next generation of these products. You'll work in an international team that pairs German software quality and Vietnamese speed to innovate.
JTL Shop 6.0 is a new, cloud-native multi-shop SaaS platform: headless, API-first, built on Microsoft Azure, and closely integrated with the JTL ERP Cloud as the leading cloud ERP system. The goal is a scalable, economically operable platform that lets growth-oriented merchants run multiple shops, brands, and markets from a single backend. To build this platform - from architecture through MVP launch - we are assembling a new, interdisciplinary project team.
As a Senior Frontend Engineer, you define the frontend architecture of the new, headless JTL Shop 6.0 and build a scalable, reusable component system for a multi-shop frontend. You ensure the storefront's performance, SEO, and accessibility, and integrate the frontend closely with the backend APIs.
This role is part of the interdisciplinary JTL Shop 6.0 project team (Tech Lead, Product Owner/Project Manager, UI/UX, Frontend, Backend, DevOps, QA) and works in short, agile cycles with clear definition-of-done and review processes.
YOUR EXCITING TASKS
Define the frontend architecture of the new, headless JTL Shop 6.0, including rendering strategy (SSR/ISR) and routing
Build scalable component systems and a reusable UI architecture for a multi-shop/multi-tenant frontend
Ensure the storefront's performance (Core Web Vitals), SEO, and accessibility
Integrate the frontend closely with the backend APIs and data flows from the JTL ERP Cloud and other platform services
Conduct code reviews and define binding standards for frontend development across the team
Work closely with UI/UX design to implement design systems cleanly
YOUR PROFILE AND YOUR PERSONALITY
Several years of experience (typically 5+ years) as a frontend developer, including proven experience in a senior role
Strong knowledge of [protected info] (SSR, ISR, routing, middleware) and React (advanced patterns, hooks, state management)
Experience in SEO optimization (metadata, structured data) and performance optimization (Core Web Vitals)
Experience building component libraries or design systems for scalable frontends
Confident handling of REST APIs and modern data-fetching strategies, e.g. caching, ISR, streaming
Understanding of headless/PWA architectures in an e-commerce context
Personal competencies
High quality standards for code, performance, and user experience
Independent, structured way of working
Enjoys technical discussion and constructive feedback within the team
Motivated to help shape a frontend from scratch rather than maintain an existing one
Nice To Have
Experience with multi-shop/multi-tenant frontends (theming, internationalization, locale/currency handling)
Knowledge of accessibility standards (WCAG)
Experience working closely with UI/UX teams, e.g. via Figma handoff
Experience with AI-assisted development tools (Claude Code, GitHub Copilot) in daily work
Benefits Await You At Code Leap
Competitive salary and benefits
Year-end bonus (13th-month salary)
Generous annual leave of up to 18 days
Additional premium health insurance
Enjoy an endless selection of delicious refreshments, including gourmet coffee, beverages, snacks, and fresh fruits, all complimentary
1-on-1 coaching with experienced professionals
Flexible work policy, which provides flexible hours to accommodate personal schedules and commitments
Dynamic, fun, and agile environment, perfect for sharing and creativity
Open-minded, kind & humble colleagues
CONTACT
Come to talk to us at [protected info]
About Us
With our expert teams spread across two continents, CODE LEAP provides innovative software solutions for venture-backed companies and leading enterprise businesses in Germany. Our teams in Berlin (Germany) and Ho Chi Minh City (Vietnam) work hand in hand to develop state-of-the-art solutions of the highest quality.
Because collaborating with the right people is the secret to our successful growth.
We future-proof organizations - be part of it!