Senior Software Engineer (Shopify)

About impact.com impact.com is the world’s leading commerce partnership marketing platform, transforming the way businesses grow by enabling them to discover, manage, and scale partnerships across the entire customer journey. From affiliates and influencers to content publishers, brand ambassadors, and customer advocates, impact.com empowers brands to drive trusted, performance-based growth through authentic relationships. Its award-winning products—Performance (affiliate), Creator (influencer), and Advocate (customer referral)—unify every type of partner into one integrated platform. As consumers increasingly rely on recommendations from people and communities they trust, impact.com helps brands show up where it matters most. Today, over 5,000 global brands, including Walmart, Uber, Shopify, Lenovo, L’Oréal, and Fanatics, rely on impact.com to power more than 225,000 partnerships that deliver measurable business results. Your Role at Impact.com We're looking for someone who knows Shopify well enough to challenge how we're using it. This isn't a role for someone who simply builds Shopify features. It's for an engineer who understands Shopify's platform deeply and wants to influence how one of the world's largest partnership platforms integrates with it. Reporting to the Engineering Manager, E-commerce Platform Integrations, you'll own and evolve impact.com's Shopify integration - a critical platform connecting thousands of merchants directly to our ecosystem. You'll help shape our approach to Shopify Apps, Web Pixels, merchant onboarding, API integrations and platform architecture while ensuring our integration continues to evolve alongside Shopify itself. If you're the kind of engineer who enjoys reading Shopify release notes, experimenting with new platform capabilities, debating architecture decisions and building systems that scale across thousands of merchants, we'd love to talk to you. What You'll Own • Own the development and evolution of our Shopify integration, including Apps, Web Pixels and platform extensions. Build reliable, privacy-compliant solutions that accurately capture conversions, refunds and customer events while adapting to Shopify's evolving platform capabilities. • Design and improve the complete merchant installation experience. You'll build secure OAuth flows, manage credentials, automate onboarding and ensure merchants can install and activate Impact with minimal friction. • Build and maintain the Ruby on Rails application that connects Shopify with Impact's APIs and workflow engine. • You'll design resilient webhook consumers, manage high-volume data pipelines and ensure reliable synchronisation between platforms. • While Ruby on Rails is our primary backend technology, we're happy to support experienced Shopify engineers in developing deeper Rails expertise. • Own the health of our Shopify integration in production. • You'll proactively manage API version upgrades, monitor webhook delivery, troubleshoot merchant-specific issues and ensure the platform remains performant, secure and resilient as Shopify evolves. We don't want someone who simply maintains an integration. We want someone who can improve it. You'll help us identify better ways of using Shopify's platform, evaluate new capabilities such as Checkout Extensibility, Functions and Web Pixels, and influence the future direction of our Shopify ecosystem. What You'll Bring • You've built production Shopify Apps, integrations or platform extensions and understand the Shopify ecosystem beyond storefront development. • Ideally you've worked with technologies such as Shopify Apps, Checkout UI Extensions, Web Pixels, Shopify Functions, App Bridge, GraphQL Admin API, OAuth, Webhooks, Shopify Partner Dashboard • You've built integrations between complex SaaS platforms and understand how to design reliable event-driven systems. • You're comfortable working with REST and GraphQL APIs, OAuth authentication, Webhooks, Rate limiting, Background processing, High-volume event pipelines • You have experience building and maintaining production backend services. • Ruby on Rails experience is preferred, but we're equally interested in experienced Shopify engineers who have worked with technologies such as Node.js, Python, PHP or Java and are excited to work with Rails • You're comfortable working with modern JavaScript or TypeScript and understand how browser-based tracking technologies operate within Shopify's platform You think beyond individual features. You understand how changes to one system affect another and enjoy designing reusable, scalable solutions that work across thousands of merchants rather than solving one-off problems We'd Love To See Experience With • Shopify Plus • Marketing attribution • Affiliate platforms • Conversion tracking • Analytics platforms • Commerce integrations • Workflow automation • CI/CD pipelines • Production monitoring and observability Benefits and Perks: At impact.com, we believe that when you’re happy and fulfilled, you do your best work. That’s why we’ve built a benefits package that supports your well-being, growth, and work-life balance. • Flexible Working: Our Responsible PTO policy means you can take the time off you need to rest and recharge. We're committed to a positive work-life balance and provide a flexible environment that allows you to be happy and fulfilled in both your career and your personal life. • Health and Wellness: Your well-being is a priority. Our mental health and wellness benefit includes up to 12 fully covered therapy/coaching sessions per year, with additional dependent coverage. We also offer a monthly gym reimbursement policy to support your physical health. • A Stake in Our Growth: We offer Restricted Stock Units (RSUs) as part of our total compensation, giving you a stake in the company's growth with a 3-year vesting schedule, pending Board approval. • Investing in Your Growth: We’re committed to your continuous learning. Take advantage of our free Coursera subscription and our PXA courses. • Parental Support: We offer a generous parental leave policy, 26 weeks of fully paid leave for the primary caregiver and 13 weeks fully paid leave for the secondary caregiver. • Technology Financial Support: We provide a technology stipend to help you set up your home office and a monthly allowance to cover your internet expenses impact.com is proud to be an equal opportunity workplace. All employees and applicants for employment shall be given fair treatment and equal employment opportunity regardless of their race, ethnicity or ancestry, color or caste, religion or belief, age, sex (including gender identity, gender reassignment, sexual orientation, pregnancy/maternity), national origin, weight, neurodivergence, disability, marital and civil partnership status, caregiving status, veteran status, genetic information, political affiliation, or other prohibited non-merit factors.