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We're looking for a Senior Full-Stack Developer with a strong backend focus to lead one of the most impactful transitions in our company's history: consolidating 15 Shopify stores into a unified, scalable, appfirst architecture. This isn't a maintenance role. You'll shape technical direction, work directly with product and business, and have real ownership from day one. What You'll Work ODesign and build scalable backend systems on AWSCentralize user authentication and order management across multiple Shopify storesIntegrate legacy systems into a unified app-based architectureContribute to the Breeze mobile app ecosystemLead key initiatives including: o Multi-store order management consolidation o AI chatbot integration (SuperChat) o Dynamic bundle builder for multi-destination travelLeverage AI tools daily to accelerate development and problemsolvingCollaborate cross-functionally with product, marketing, and partner teams Tech Stack• Cloud: AWS • eCommerce: Shopify (multi-store) • Data & Marketing: PostHog, Klaviyo • AI Tools: GitHub Copilot, Claude, Lovable • APIs: eSIM Go API and third-party integrations Engineering Culture We're AI-first by default, not as a buzzword, but as a daily practice. GitHub Copilot and Claude are part of our standard workflow. We move fast, ship continuously, and trust our engineers to make decisions.Job requirementsWhat We're Looking For • 5+ years of full-stack development experience• Strong backend expertise (~70% backend / 30% frontend split)• Proven ability to thrive in startup or high-growth environments• Solid understanding of scalable architectures and API design• Hands-on experience with AI-powered development tools• eCommerce or Shopify experience is a strong plus• Independent, ownership-driven mindset — you don't wait to be told what to do Soft Skills That Matter!• Comfortable navigating ambiguity and fast-changing priorities• Strong communicator across technical and non-technical teams• Collaborative, low-ego, high-impactWhy Join Now • Targeting 40–50% business growth this year• Transitioning from acquisition-only to retention-driven growth• Moving from website-first to app-first within 6 months• Small team → direct impact on product and technical direction• Work with cutting-edge AI tools as a core part of your workflow Benefits & Perks:• Full-time permanent role, based remotely• Competitive salary (40-50K)• Fast-growing international company• Work with top talent across the globe• Direct influence on product features and user experience• Ownership, autonomy, and professional growth • A great, supportive team to work with • The possibility to develop an innovative product in a new market within an international context • Private health insurance • 500 euros trainee budget • English/Spanish classes• Very cool projects with the latest and high-end technology• International experience • A comfortable office based in the city center of Valencia, next to the metro stop• Full remote work • Nice social environment with a game room, joint lunches, drinks, and regular parties
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