Principal UI Engineer (Shopify) Web & eCommerce - Front End Leeds

At IDHL, we're more than a digital agency, we're a strategic partner to ambitious brands, helping them accelerate growth in the digital economy.

Our expertise is delivered through three core divisions: Performance, Web & eCommerce, and Intelligence - all working closely together to create impact across channels.

We're also home to Fostr, a Shopify Plus agency for luxury and lifestyle brands, and The MTM Agency, specialists in integrated marketing and audience engagement.

What connects it all is our focus on outcomes, not just outputs. We back each other, take pride in what we do, and make sure the way we work works for everyone.

• Lead the technical delivery of complex Shopify projects across themes, apps, checkout, and headless builds
• Own architecture decisions, code quality, performance, and long-term maintainability
• Act as the go-to technical authority and escalation point for teams and clients
• Drive best practices in JavaScript/TypeScript, OOP, testing, and documentation
• Shape and improve development tooling, CI/CD pipelines, and local environments
• Mentor developers and set high standards for delivery across the team
• Partner closely with PMs, designers, and clients to deliver exceptional ecommerce solutions
• Work with cutting-edge Shopify features including GraphQL, Markets, Hydrogen/Oxygen, and checkout customisation

• Is an expert in Shopify development and ecommerce architecture
• Enjoys solving complex technical challenges and leading by example
• Cares deeply about performance, code quality, and scalability
• Thrives in a client-facing, collaborative agency environment
• Wants real ownership, influence, and progression

Full Job Spec Available Upon Request