Shopify App Developer Needed – Bundle & Upsell App (Like Kaching / Pumper / AOV.ai)

@OutsourceMan

As a team that strives for excellence at every turn, CnELIndia is more than prepared to take on the challenge of creating your Shopify bundle and upsell app. With our decade and a half of experience under our belts, we've built a reputation on delivering outstanding quality while adhering to tight timelines and budgets. Our extensive skill set including in-depth understanding of HTML, PHP, and Shopify means we're able to harness the power of these technologies to create secure, scalable, and high-performing apps. Furthermore, our proficiency in using the Shopify APIs will prove invaluable in building an app with all the core features you've outlined from fixed and mix-and-match bundles to post-purchase upsells. At CnELIndia, we never rest on our laurels. We are always looking to push boundaries and stay at the forefront of technological advancements. Consequently, our grasp of technologies like Node.js/Remix, Polaris, App Bridge, and webhooks aligns perfectly with your project's needs. Given this unique confluence of skills and commitment to excellence, I believe CnELIndia truly is your best fit for this project.

@kamran2012

Hi there, I will build your bundle and upsell Shopify app — fixed bundles, mix-and-match, BOGO, quantity breaks, and in-cart/post-purchase upsells — with a merchant dashboard covering revenue tracking and A/B testing. For the storefront widget, I will use Checkout Extensibility and Theme App Extensions rather than injecting scripts — this keeps the app compatible across all themes without performance hits and passes Shopify's public app review requirements. I will also structure the offer logic server-side so discount stacking and inventory deductions stay accurate under concurrent traffic. Questions: 1) Do you want AI-powered recommendations from day one, or is that a phase-two feature? 2) Are you planning to monetize via a freemium model — and if so, do you need billing integration through Shopify's Subscription API? Looking forward to talking through the details. Kamran

@durgesh8527

As an experienced and versatile Shopify App Developer with a heavy emphasis on creating clean, scalable, and high-performing web & mobile applications, your bundle & upsell app is well within my wheelhouse. My decade-plus of Full Stack Development experience has enabled me to build end-to-end software solutions across various platforms that help businesses grow, including APIs and CMS platforms like WordPress and Shopify. I'm confident in my ability to deliver your project on time and with the level of performance optimization you're after by leveraging my core skillset in using Shopify APIS (Admin, Storefront, Checkout Extensibility). But what sets me apart? Not only am I comfortable utilizing technologies like Node.js/Remix (or similar), Polaris, App Bridge, and webhooks to create your app's features such as fixed/mix-and-match bundles, quantity discounts, BOGO offers, frequently bought together items, in-cart/post-purchase upsells, and one-click add-to-cart functionality - I am also proficient in technologies key to your offer such as AI recommendations or subscription upsells. AI skills would come in handy with addition/updating eCommerce AI methods and for undertaking A/B testings.

@vishal1145

Your app will fail at scale if you hardcode bundle logic into the storefront – I've seen three apps like this crash during Black Friday because they didn't use Shopify Functions for discount calculations. That's the difference between processing 100 orders per hour versus 10,000. Before architecting this, I need clarity on two things: Are you planning to support Markets with multi-currency pricing from day one, or can we phase that in post-launch? And what's your expected merchant count at 6 months – 50 stores or 5,000? This determines whether we build on Remix with serverless functions or need a dedicated Redis layer for caching. Here's the architectural approach: - SHOPIFY FUNCTIONS + CHECKOUT EXTENSIBILITY: Build discount logic server-side using Functions API to ensure calculations happen at checkout, not in the cart. This prevents discount conflicts and supports stacking rules without breaking themes. - NODE.JS + REMIX + POLARIS: Use Remix for the merchant dashboard with Polaris components for native Shopify UX. Implement webhook handlers with retry logic to sync product catalogs in under 2 seconds when merchants update inventory. - POSTGRESQL + REDIS: Store bundle configurations in Postgres with indexed queries on product IDs. Cache frequently accessed bundles in Redis to serve recommendations in under 100ms, even at 50K requests per hour. - STOREFRONT API + APP BRIDGE: Inject bundle widgets using App Blocks (not theme liquid) so they work across all themes without manual installation. Use GraphQL batching to load product data in a single request instead of N+1 queries. - A/B TESTING ENGINE: Track conversion lift by variant using event-driven analytics. I've built similar systems that increased merchant retention by 35% because they could prove ROI in their first week. I've shipped two Shopify apps that are currently processing $2M+ in monthly GMV. One handles subscription upsells for a brand doing 15K orders per day without rate limit issues. I don't build apps that merchants uninstall after the first sale spike – let's discuss edge cases like partial refunds on bundles and how your pricing model affects the tech stack before we start development.

@mahig47

Hello! As per your project post, you’re looking to build a Shopify public app focused on bundles, upsells, and AOV optimization similar to leading apps, with a strong emphasis on performance, flexibility, and ease of use for merchants. The app will support multiple offer types like bundles, quantity breaks, BOGO, and post purchase upsells, along with a no code dashboard and analytics. The goal is to create a high converting, theme compatible app that merchants can easily adopt and scale. My focus will be on delivering a complete Shopify app solution, featuring: bundle creation with fixed and mix and match options, quantity discounts and BOGO offers, frequently bought together and one click add to cart functionality, in cart and post purchase upsells using checkout extensibility, and a clean merchant dashboard for managing offers tracking revenue and conversion rates with A B testing. I will also ensure a mobile friendly customizable UI compatible with all themes. I specialize in building scalable ecommerce applications with strong experience in Shopify ecosystem, API integrations, and conversion focused features. My focus is on delivering high performance apps that are easy for merchants to use and effective in increasing sales. Let’s connect to review your feature priorities, app roadmap, and launch goals so we can define a clear execution plan. Best regards, Nikita Gupta.

@technologiesit

As an experienced Shopify App Developer, I am confident I can deliver the high-performance bundle & upsell app your business needs. My 10+ years of experience spans a myriad of technologies including the central ones you've listed: Node.js, React.js, and PHP. I also have strong command over Shopify-specific web development tools (Polaris and App Bridge) and backend utilities like PostgreSQL—which I can easily call upon to build the scalable, performant Shopify app you envision. Over the years, I've successfully delivered 100+ projects similar in scope to yours. My process focuses not just on creating a stable product but also on understanding and leveraging modern digital strategies to maximize its impact, which aligns neatly with your goal of elevating conversions and boosting AOV. Most importantly, my work doesn't end at delivery. I assure you promptness, consistent communication, and end-to-end support post-launch including not only maintenance but documentation too to ensure that your team can hit the ground running with confidence with this new addition in their tool-set. With me onboard as your freelancer choice, all you need to do is sit back while I convert your vision into reality.

@kishanbwts

Building a bundle and upsell app like Kaching or Pumper quickly comes down to smart API use and clean, modular design. I’ve helped a client in retail launch a Shopify upsell app that boosted their average order value by 15% within weeks by focusing on easy-to-configure bundles and smooth cart integration. I’d start by outlining the core app layers—product selection logic, discount calculation, and UI components—then build using Shopify’s Admin and Storefront APIs with Node.js backend and Polaris for UI consistency. For mix-and-match bundles and BOGO offers, I suggest building flexible rules that merchants can customize through a no-code dashboard. Have you considered which checkout extensibility points you want to use for post-purchase upsells? That choice affects both UX and technical complexity. Performance tuning is key, so I’d focus early on caching strategies and minimizing API calls. Also, creating clean, theme-friendly UI components is vital for mobile compatibility, which I’ve done before by leveraging Polaris and App Bridge. Once the core is solid, I can add A/B testing and revenue tracking in the dashboard. The onboarding flow will guide merchants step-by-step for fast setup. Ready to map out your app’s architecture and start building the first MVP layer this week.

@AZTURK1

Hi there, I understand you need a scalable public Shopify bundle & upsell app built with Shopify Admin, Storefront and Checkout Extensibility; I will use Node.js/Remix (or similar), React/Polaris and App Bridge to deliver a performance-optimized, theme-compatible integration. - Deliverable: Implement fixed & mix-and-match bundles, quantity discounts, BOGO, frequently-bought-together, in-cart + post-purchase upsells, and one-click add-to-cart using Shopify Admin API, Storefront API and Checkout Extensibility. - Deliverable: Build a no-code merchant dashboard (React + Polaris) with PostgreSQL analytics, revenue/conversion tracking and A/B test workflows, plus theme-compatible storefront widgets and webhooks. - Optional: Add AI recommendation engine or subscription upsell hooks if requested. - Risk/QA: staged deployment with rollback plan and post-deploy validation. Skills: ✅ Shopify APIs ✅ Node.js / Remix ✅ React.js / Polaris / App Bridge ✅ Checkout Extensibility ✅ PostgreSQL Certificates: ✅ Microsoft® Certified: MCSA | MCSE | MCT ✅ cPanel® & WHM Certified CWSA-2 I’m available to start immediately; Do you want the app published to the Shopify App Store at launch or kept private first for staged rollout? Best regards,

@NEHABHAT92

In your search for a highly skilled Shopify App Developer, you've stumbled upon my profile, and I'm genuinely excited about the prospect of bringing your 'Bundle & Upsell' app to life. Throughout my 9+ years of web and mobile development experience, I've continuously honed my skills in HTML, JavaScript, Laravel, Node.js, and PHP. With such expertise under my belt, I am confident in my ability to build an app that meets all your requirements and more. I bring more than just technical know-how to the table. I understand the value of a seamless user experience and how that can directly impact conversion rates and AOV. As such, not only will the app I build for you incorporate core features like fixed and mix-and-match bundles as well as quantity discounts, in-cart and post-purchase upsells, but it will also have a fully customized and mobile-friendly UI across all themes. Additionally, managing your app with ease will be a breeze with the simple yet intuitive merchant dashboard I'll provide. This UI will track critical metrics like revenue, conversion rates while creating offers, so you maintain complete control over your campaigns. Lastly, as an ardent believer in thorough documentation and impeccable support even after delivery is complete, rest assured that my commitment to your project remains steadfast even far beyond its completion. Thanks for considering my profile; let's get started on making your Shopify app a grand success!

@bridgestonetech1

Hi, I read your requirement and this is a proper Shopify app build, not just a feature plugin. You’re aiming for a scalable, public-ready upsell & bundle app, and that’s exactly how we’d approach it. We’ll handle this with our full-stack team using Node.js + Remix, Shopify App Bridge, Polaris, and the latest Checkout Extensibility APIs to ensure performance and long-term compatibility. We’ll build: Bundle system (fixed + mix & match, BOGO, quantity breaks) Frequently bought together + one-click add-to-cart In-cart + post-purchase upsells Theme-compatible, mobile-first UI (no-code setup for merchants) Merchant dashboard with analytics (AOV, conversions) + A/B testing Clean onboarding flow for public app readiness The focus will be on speed, compatibility across themes, and conversion performance, similar to apps like Kaching and Pumper, but with a more scalable architecture. We’ve worked on Shopify custom apps and API-heavy systems, so handling webhooks, checkout flows, and performance optimization is well within scope. Let’s connect, I can outline the architecture and timeline to hit your 3–6 week goal.

@KarthikTechCon

Hi, I’m Karthik with 15+ years of experience building scalable eCommerce solutions, custom apps, and conversion-focused platforms. I can help build your Shopify bundle & upsell app with a clean, high-performance architecture suitable for private launch first and public app readiness later. I’m comfortable with Shopify Admin API, Storefront API, Checkout Extensibility, Polaris, App Bridge, webhooks, Node.js/Remix, and merchant-friendly dashboard workflows. Core features I can deliver: Fixed & mix-and-match bundles Quantity breaks / volume discounts BOGO offers Frequently Bought Together In-cart + post-purchase upsells One-click add-to-cart Theme-compatible, mobile-friendly widgets Merchant dashboard for offer creation, analytics, conversion/revenue tracking A/B testing foundation Onboarding flow, docs, and deployment support Suggested stack: Shopify app using Node.js + Remix, Polaris UI, App Bridge, webhook-driven sync, optimized data model, and scalable offer engine for future AI recommendations/subscription upsells. My approach is to first build the core offer engine + theme-safe frontend widgets, then merchant dashboard, analytics, onboarding, and public-app hardening. Focus will be on performance, compatibility, and clean merchant UX. I’ve worked on custom eCommerce platforms, checkout/payment flows, admin systems, and scalable SaaS-style builds, so I can keep this production-ready and extensible. Warm Regards, Karthik

@abdf2010

Hey, your project, Shopify App Developer Needed – Bundle project looks like a great fit for my skills. I've worked on similar PHP projects and can deliver solid results. Let me know if you'd like to chat about the approach.

@Andyloredo

Building a scalable Shopify app with features like mix-and-match bundles and post-purchase upsells requires careful attention to API integration and performance. I’ve previously developed similar Shopify apps leveraging Node.js and Polaris to manage complex product configurations and offer logic, ensuring a smooth merchant experience and efficient data handling. I'm confident in delivering the core features you've outlined, including the merchant dashboard and one-click add-to-cart functionality, within the 7-day timeframe, focusing initially on the fixed bundle and in-cart upsell components. Given the desired level of customization, could you clarify the anticipated complexity of the merchant dashboard UI?

@arshig8

Hello, I have carefully reviewed your project requirements and understand you are seeking a reliable professional who can deliver a well-planned, high-quality digital solution with clarity, commitment, and long-term value. I am a full-stack developer and digital solution consultant with 4+ years of freelance experience, passionate about building scalable, user-friendly, and business-oriented web and mobile applications. My approach to work is structured and transparent, ensuring the final output aligns exactly with the client’s expectations. Why I’m a strong fit for your project: Hands-on experience in MERN Stack, PHP, Laravel, HTML, WordPress, Shopify, and modern UI design. Application development for Android and IOS in Flutter Strong background in website design, graphics, and customer-centric interfaces Proven ability to manage projects end-to-end, from planning and development to deployment and support Experience working with clients who value quality, timelines, and clear communication I focus on clean code, intuitive design, and performance optimization, ensuring the solution is reliable, secure, and easily scalable. I believe in honest commitments, realistic timelines, and delivering exactly what is promised. I want to discuss your goals further and clarify any details needed before moving ahead. Thank you for your time and consideration. Looking forward to the opportunity to work together. Best regards, Arshiya

@Mayanks010

Hi, I have experience in developing websites and can help you build a clean, responsive, and user-friendly solution based on your requirements. To provide an accurate timeline and cost, I’d like to understand a few details such as features, design preference, and platform. Let’s connect on chat so I can share relevant work and discuss the best approach for your project. Best regards, Mayank

@umekayani01

Hey there, Need a Shopify bundle and upsell app..? but the real challenge is building a scalable conversion system that works across themes, handles checkout extensibility safely, and processes real time pricing logic without slowing storefront performance or breaking Shopify constraints. buildShopifyApp bundleEngine upsellLogic mixMatchOffers quantityBreaks checkoutExtensibility webhookSync aovOptimization adminDashboard analyticsAB testing scalableArchitecture Key point a high performance Shopify app that increases AOV through smart bundles and upsells with smooth checkout integration Do you want MVP version first or full scalable public app build Warm regards Umer Kayani

@GobindSawarn

With over 5 years of experience, I take pride in my ability to understand not just the technical aspects of a project, but the business goals driving it. Building upon my HTML, JavaScript, Node.js, React.js and Shopify expertise, I actively stay on top of emerging technologies such as Polaris, App Bridge and webhooks to rapidly build versatile and scalable applications. Notably, I have considerable experience working with Shopify APIs and building Shopify apps from scratch which aligns perfectly with your project requirements. Your demand for AOV boosting through bundle offers and upsells resonates strongly with me, given my knack for creating practical solutions aimed at generating real value. Drawing on that expertise, I assure you a clean and performance-optimized app. Further, rest assured the UI aspect won't be relegated - all interfaces bundled would be fully customizable with a mobile-friendly design that functions coherently with any Shopify theme your merchants may use. And finally, something unique I bring to the table is not only delivering robust applications ready for your usage but providing comprehensive documentation and necessary support even after the delivery - thereby ensuring long-term maintainability and smooth dependency management. I’m eager to discuss how I can deliver an app and experience that exceeds your expectations within your proposed budget and timeline.

@sjohn117

Hi Merchant, I'm Sean, a Senior Full-Stack & AI Developer with 8 years' experience specializing in Shopify apps, Node.js, and React. I led development of a public bundle & upsell app that helped merchants increase average order value by 18% through mix-and-match bundles and frictionless in-cart offers. My experience building scalable, theme-compatible Shopify extensions and Checkout Extensibility integrations means I will design a no-code merchant flow for fixed and mix-and-match bundles, quantity discounts, BOGO, frequently-bought-together modules, in-cart and post-purchase upsells, and one-click add-to-cart with full performance optimization; I can do this project perfectly. I typically deliver this scope in 28 days, including onboarding flow, documentation, and deployment-ready CI/CD. I ensure quality with unit and E2E tests, logging/monitoring, OWASP basics, clean code and docs, webhook reliability, and privacy-aware AI recommendation evals/guardrails where applicable. Please review the outlined priorities and next steps below Which 2–3 offer types (e.g., mix-and-match bundles, BOGO, quantity breaks) do you consider highest priority for launch, and do you need AI-driven recommendations on day one? Best regards, Sean

@shailender18

Hi, I’m an experienced full-stack developer with a strong background in Shopify app development and API integrations. I have previously built custom Shopify apps using Node.js and Remix, and I am well-versed in implementing Shopify’s Post-Purchase and Checkout Extensibility APIs to create high-converting upsell and bundling experiences. I can build a high-performance app with a seamless UI/UX similar to Kaching or Pumper, ensuring it is optimized for speed and provides a smooth merchant onboarding flow. I’m ready to start immediately and can ensure a robust, scalable solution for your project. Looking forward to working with you! -Shailender