Product customizers
Build-your-own products, photo uploads, live previews and pricing.
Services
Custom Shopify apps & product customizers
When no Shopify app can do what you need, I build a custom app made for your store and workflow: product customizers in your theme, apps with their own admin, checkout and customer account apps, and API integrations.
Message me on Upwork to arrange a free 30-minute call.
Top Rated on Upwork · 4.9 rating · Cebu City, Philippines
In short
- For Shopify stores that need a feature no existing app offers.
- Product customizers are added directly to your Liquid theme and connected to Shopify metafields and metaobjects, so your team can manage options without touching code.
- I also build apps with their own admin or backend interface, custom apps for checkout and customer accounts (some checkout customizations need Shopify Plus), and integrations with third-party APIs like Judge.me.
- Two recent customizers took about 3 weeks and about 5 weeks, depending on calibration, client feedback and the number of variants.
- Custom app projects usually take 3+ weeks.
Who it's for
Problems this solves
- No existing Shopify app does what you need
- You sell build-your-own or personalized products
- Your team needs to manage product options without touching code
- You need custom checkout or customer account features
- You want to connect a third-party service through its API
What's included
What's included
Built into your theme
Added directly to your Liquid theme and connected to metafields and metaobjects, so your team manages options without touching code.
Apps with their own admin
Custom apps with a backend interface, with both the backend and the frontend built and set up.
Checkout & customer accounts
Custom apps for checkout and customer accounts, checked against what your Shopify plan allows.
API integrations
Third-party apps connected through their API, like Judge.me.
Your code, your accounts
The Shopify Partner account, hosting such as Vercel and the GitHub repository can be set up under your own accounts.
Checkout extensions & discount Functions
I build checkout UI and post-purchase extensions, Shopify Functions for order, product and shipping discounts, and custom delivery and payment rules. My checkout work also includes cart and checkout validation and local-pickup customizations.
Tell me which checkout step or rule needs to change and which Shopify plan you use. I'll check the scope against what your plan allows before estimating.
See the checkout extensions and discount Functions project →If you need help migrating checkout events, see tracking & analytics.
How it works
How it works
- 01
Share your requirements
What options shoppers should choose, how pricing should work, and what should happen after they add it to cart.
- 02
Mockup
Send your mockup if you have one. If you don't, I can design it for you.
- 03
Timeline & estimate
You get a timeline and estimate for the first version before we start.
- 04
Build & test
Tested on mobile, tablet and desktop, iPhone to Windows.
- 05
Handover
Every build comes with notes your team can follow.
Proof
Results and client reviews
Australia · Custom framing & canvas prints
Framely: Print & Frame customizer
Built Print & Frame, a custom app product customizer where shoppers upload a photo, pick size, finish and frame, and see a live preview and price, and implemented the full website design revamp. It took about 5 weeks, because of the large number of variants that had to be set up. A year on, the custom canvas print builder is still a top sales driver.
Custom appProduct customizerSite redesign
Singapore · Private client
Custom gift & fidget toy brand
Built a build-your-own product customizer, as part of a store redesign focused on conversion. It took about 3 weeks, because it needed extra calibration and several rounds of client feedback.
Product customizerSite redesign
Australia · API integration
Gourmet chilli sauce brand: custom reviews page
A custom reviews page built using the Judge.me API.
Judge.me API
Shopify Development and Expert Consulting
I truly appreciate Philip's expertise. He possesses deep knowledge of the field and has an exceptional ability to communicate clearly and provide valuable advice on solutions to shop-owner challenges.
Clear CommunicatorSolution Oriented
Verified Upwork client
Hydrogen Shopify Integrations
Philip is a fantastic UpWorker. Great development skills, great communication.
Committed to QualityClear Communicator
Verified Upwork client
Shopify Website Revamp & Custom Product Configurator Development
Superb job quaity, everything I need for my website, Customizer configuration etc. are all delivered. Highly recommended!!
Committed to QualityDetail OrientedShopify DevelopmentShopifyShopify Apps
Verified Upwork client
+2
Shopify PlusShopify ThemeShopify Developer - Connect Metaobjects to front end table view
Verified Upwork clientPhillip is great to work with, happily recommend. He is fast and efficient, and a good communicator.
Install Judge.me and import existing Klaviyo review data
Verified Upwork clientPhilip did a great job for us again helping us switch the review app on our Shopify site.
Wishlist, Sample Limiter, and Business Central Integration
Great work again by Philip -- will continue to seek out for our Shopify custom development needs
Committed to QualitySolution OrientedClear Communicator
Verified Upwork client
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View project →Gourmet chilli sauces & condiments · Australia
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View project →More related projects: Theme migration · Custom variant system · Build-your-own bundle · Theme OS 2.0 migration · Custom subscription portal · Rebrand and Dawn 2.0 migration · Custom bundle · Language-based product images for variant options · Figma to Dawn 2.0 · Shopify Plus · Checkout extensibility · Product quiz builder · Shopify Plus B2B checkout
Quote
Get a quote for your project
Every store is different, so I quote each project based on your requirements. Message me on Upwork to arrange a free 30-minute call about what you need. I'll reply with a timeline and estimate before any work starts.
Free 30-Minute CallFAQ
Frequently asked questions
Can you integrate a third-party API with my Shopify store?
Yes. Share the API documentation and access details with me, plus what you want the integration to do. I'll check whether it's feasible on the Shopify platform and give you an estimate and timeline before we start.
Depending on what's needed, I can build a custom Shopify app, a theme app extension or a small backend service for the integration. I've integrated services like Recharge, Ordergroove, Okendo, Firebase and Vercel.
If possible, share a sandbox or test API key first, so I can test everything without affecting your live data.
Do you build custom apps and product customizers?
Yes. I've built product customizers that are added directly to the store's Liquid theme and connected to Shopify metafields and metaobjects, so the store team can manage options without touching code. One example is the Print & Frame customizer for Framely, where shoppers upload a photo, choose size, finish and frame, and see a live preview and price. I also built a build-your-own product customizer for a Singapore custom gift brand.
What do you need from me to build a custom app or product customizer?
A mockup of how you want it to look, if you have one. If you don't, I can design it for you. Most importantly, give me the details of your requirements: what options shoppers should be able to choose, how pricing should work, and what should happen after they add it to cart. The clearer the requirements, the more accurate my estimate.
How long does it take to build a custom app or product customizer?
It depends on the requirements. For example, the customizer for the Singapore gift brand took about 3 weeks, because it needed extra calibration and several rounds of client feedback. The Framely customizer took about 5 weeks, because of the large number of variants that had to be set up. It's hard to give an exact estimate up front, because once the first version is built, clients usually come up with more features they'd like to add. I'll give you a timeline and estimate for the first version before we start.
Can you build an app with its own admin or backend interface?
Yes. It takes longer than a theme-based customizer, because the work is doubled: both the backend and the frontend need to be built and set up. I'll explain the scope and timeline before we start.
What's needed to build a custom app with a backend interface?
Usually a Shopify Partner account to create the app, a hosting platform such as Vercel, and a GitHub repository for the code. If you want to own the source code and have full control, we can set these up under your own accounts. I'll walk you through what's needed for your specific app.
Can you build custom apps for checkout and customer accounts?
Yes, depending on your requirements. Give me the details of what you need, so I can give you an accurate estimate. Note that some checkout customizations are only available on Shopify Plus, so I'll check what's possible on your plan first.
Let's get started
No detailed brief needed.
Message me on Upwork to arrange a free 30-minute call. If you need an audit, I'll explain the scope and cost first. Implementation is quoted separately.
- 1 Your store URL, or just your product if you're starting fresh
- 2 Your budget
- 3 What's not working, or what you want to build
