WHO WE ARE
First Day stands at the forefront of health and wellness, driven by a passion for empowering families to live their healthiest, most vibrant lives. Guided by cutting-edge research, we’ve created a lineup of science-backed products designed to foster total well-being. By championing innovative solutions for every stage of life, First Day remains steadfast in our commitment to helping individuals and families unlock their full potential for health and vitality.

THE ROLE
We are seeking a Full Stack Shopify Developer who brings deep hands-on expertise across the full Shopify ecosystem, a track record of driving measurable growth at brand-forward CPG ecommerce companies, and an AI-native engineering mindset.

This role will play a key part in building, optimizing, and scaling Shopify storefronts and applications in a fast-paced, high-growth environment.

RESPONSIBILITIES
Develop and maintain Shopify storefronts, custom themes, and apps
Build and manage integrations across Shopify, third-party APIs, and internal systems
Collaborate with product, design,



and operations to deliver high-quality user experiences and ship features quickly
Build, own, and maintain custom Shopify apps and checkout UI extensions to ensure optimal performance and reliability
Author and maintain Shopify Functions, metaobjects, and subscription integrations in production
Support the instrumentation, tracking, and ongoing management of on-site data to enable accurate insights
Own accessibility quality for on-site experiences, including testing, issue resolution, and continuous alignment with best practices and standards
Optimize site performance, scalability, and conversion rates — connecting technical improvements to business outcomes
Support experimentation efforts (A/B testing, pricing, shipping, checkout, and UX flows)
Troubleshoot and resolve complex full-stack technical issues
Work with structured data, schemas, Shopify metafields, and metaobjects
Contribute to scalable system desig

📌 Software Engineer (Modena)
🏢 First Day
📍 Modena