Senior Frontend Engineer

We support tech companies in building engineering teams in Poland. For this role, we act as a recruitment partner handling the hiring process on behalf of our customer.

Haptiq is an AI-native enterprise solutions company with purpose-built technology for public & private companies, governments, institutions, asset managers, and family offices.

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With headquarters in New York City and four global offices, Haptiq is supported by more than 300 engineers and delivery professionals across the globe.

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By centralizing and unifying data, automating workflows, and surfacing predictive nsights, Haptiq enables organizations to scale operational excellence and generate alpha across complex enterprise environments.

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As a Senior Frontend Engineer on the Haptiq's team, you will build responsive, high-quality user interfaces using React, with a strong focus on testing, accessibility, and performance.

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The role involves close collaboration with design, backend, QA, product, project, and sales teams to deliver robust, user-centric products on time.

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• Design and document the complete end-to-end technical architecture for new and existing Shopify (primarily Shopify Plus) stores, including storefront design (headless or theme-based), backend services, integration strategy, and security.
• Evaluate and implement modern commerce patterns (headless, composable commerce).
• Lead decisions on build vs buy vs extend within the Shopify ecosystem.
• Build and maintain complex custom themes and storefronts.  Expertly develop, customize, and maintain high-quality Shopify themes, working extensively with Liquid, HTML5, CSS3/SCSS, and JavaScript/TypeScript or other JS frameworks (React).
• Integrate or build/maintain custom Shopify applications (private or public) and implement advanced functionality using Shopify Functions and Checkout Extensibility to meet unique client requirements.
• Implement advanced Shopify features related to Shopify Functions, webhooks,  and checkout extensibility.
• Customize checkout, cart, and product flows for conversion optimization and analytics.
• Lead and manage integrations with ERP systems, PIM systems, and payment gateways.
• Partner with product managers, stakeholders, and designers for changes and enhancements.

• 5+ years of experience in e-commerce solution architecture, technical consulting, or an equivalent senior technical role with at least 3 years of Shopify experience.
• Proven expertise with the Shopify platform, especially Shopify Plus, its admin features, Liquid templating, and the app ecosystem.
• Proven expertise with the headless Shopify architectures, including Hydrogen/Oxygen implementations.
• Experience developing custom Shopify apps, utilization of Shopify functions, and Checkout UI extensions for advanced customizations.
• Strong hands-on experience with Shopify's APIs (REST and GraphQL) and a solid understanding of modern web technologies (HTML, CSS, JavaScript/TypeScript, React/Next.js).
• Experience in architecting and implementing integrations with major enterprise back-office systems (ERP, OMS, PIM).
• Excellent communication skills.
• Ability for critical thinking & creativity.
• Having a systematic and logical approach to problem-solving and teamwork skills is crucial.

• Shopify Certification or other relevant e-commerce platform certifications.
• Prior experience in re-platforming from legacy systems.
• Familiarity with back-end languages (e.g., Node.js).

We value creative problem solvers who learn fast, work well in an open and diverse environment, and enjoy pushing the bar for success ever higher. We do work hard, but we also choose to have fun while doing it.