0:16
“I very much respect the knowledge that you have. You have a lot of things, just in our few communications, that no one else has mentioned. No one else has even made me think about them.”
Commerce software built to survive real orders, real inventory, and real money
Shopify apps, storefront integrations, inventory and fulfilment systems, and the back-office tooling that keeps them running through every quarterly API version.
How the production path fits together
Inputs, model decisions, review steps, and operational outputs stay visible in one system.
26
commerce case studies
2019
shipping commerce since
5.0
across client reviews
What we build for ecommerce and retail teams
The application and operations work required to move from model access to a production product.
Public Shopify apps
App Store listings that survive review, quarterly API versions, and merchants who install them in ways you did not plan for.
Inventory and reservation logic
Timed carts, stock reservation, purchase limits, and the race conditions that only appear under real demand.
Fulfilment and warehouse integration
Storefront to warehouse hardware to carrier, with the reconciliation that stops orders going missing between them.
Checkout and payment flows
Gateway integrations and checkout extensions built around what the platform actually permits, not what a demo suggested.
Product personalisation engines
Configurators, custom-design tools, and print-on-demand pipelines wired into catalogue and order data.
Commerce AI agents
Customer service and sales automation across social messaging, grounded in live catalogue and order state.
Multi-store synchronisation
Product and inventory kept consistent across several storefronts without a nightly CSV and a prayer.
Post-purchase automation
Returns, loyalty, store credit, and the operational reporting that tells you whether any of it worked.
Ecommerce & Retail products we build
Each one is a build we have shipped and a page that goes deeper.
Integrations we ship with
Existing providers stay connected through explicit contracts, ownership, and failure paths.
Shopify, payment gateways, carriers, warehouse hardware, and marketplace APIs
Ecommerce and retail case studies
Shopify Stock Reservation System
We launched a public Shopify application that provides merchants with timed cart reservations to reduce abandoned carts and improve inventory accuracy.
Carts hold stock instead of losing it: a countdown timer that installs into thousands of themes untouched, stock held via Draft Orders until it expires.
Automated Warehouse Fulfillment System
A custom platform that integrates Shopify, warehouse hardware, and multiple shipping APIs to automate order processing.
Duplicate picks and wrong-carrier shipments stopped: barcode checks lock each order, and 3 carrier and invoicing APIs are picked by destination.
Shopify Returns Automation Platform
We developed a commercial Shopify application to automate the entire post-purchase returns process for e-commerce merchants.
7% of refunds turned into exchanges; price differences charged through checkout or issued as credit.
AI Commerce Agent
An AI system to automate customer service and sales across social messaging platforms, all powered by AI.
Nearly 90% of WhatsApp and Instagram conversations closed without a human, first question to payment.
Custom E-commerce Checkout Flow
We built a standalone application to integrate the NMI payment gateway, bypassing native Shopify checkout limitations for a direct-to-consumer retailer.
42% of orders routed through NMI on a standalone checkout that honours Shopify discounts.
3D Map Product Configurator for Shopify
We developed an interactive 3D product configurator and automated the creation of production-ready files for a custom e-commerce product.
35 minutes of manual prep removed per order; elevation data becomes preview and production shapefile.
Check the product boundary first
Use a focused tool to surface delivery risk before it becomes roadmap work.
Control evidence travels with the build from the first sprint.
- SOC 2 aligned
- HIPAA-aware
- GDPR
Control posture
Compliance and trust posture
| Standard | Status | What we ship |
|---|---|---|
| PCI-DSS | In progress | We keep card data out of scope by design, using the platform or gateway vault. We build toward PCI-DSS; we do not certify against it. |
| Built for Shopify | In progress | App Store submissions built against the current requirements, including performance budgets and embedded admin behaviour. |
| Data privacy | Compliant | Customer data boundaries between storefront, app, and any third-party service the app talks to. |
| API version currency | Compliant | Apps kept current through quarterly platform versions rather than pinned until something breaks. |
How we engage
Start with a focused audit or bring a senior team into a defined product roadmap. Each model keeps scope, controls, and ownership visible.
- 01Project RescueFor a commerce build that is stalled, inherited, or breaking under load. Opens with a written review of what you have and a plan for what to build next.
- 02Discovery SprintShape the catalogue model, order flow, and first production release before any code ships.
- 03Project BuildFixed-scope delivery of an app, integration, or storefront system.
- 04RetainerRunning the app after launch: quarterly API versions, merchant support, and a monthly written recommendation on what to build next.
Typical engagement runs 6–14 weeks, scoped and priced per project. Every one opens with a written review.
A note from the team
From the team
We started Robust Devs in 2019 after watching too many good products die between agencies. The pattern was always the same: big promises in the sales call, silence by week six. We built this firm to be the opposite of that. A small senior team, honest scope, and the uncomfortable truth delivered early.
We build v1s for funded founders and stay on after launch to build what comes next. Tell us what you are working on and a senior engineer will reply.
Robust Devs
Senior engineering team
The engineering decisions behind the build
A practical reference for taking the product from prototype to production.
What clients say after the build
Real client reviews, every one checkable at source. Lightly copyedited for spelling only.
AI Change Management 
0:10“I find him very nice to work with and he actually delivers a very good quality. So I am really happy with him.”
Restaurants Insightful 0:09“The confidence that you're building with me the full product is what I want to go with.”
Self-image 0:07“You guys seem switched on and like you know what you're doing. I've got a good feeling about it.”
GoldenEye 0:05“You guys take a lot of pride and ownership in the work.”
“The team treats our roadmap like their own. Every standup felt like working with our own engineers, not an outside vendor.”
PixelFox “They shipped the production version of what our previous agency had been promising for nine months, without the weekly excuses.”
“They told us what NOT to build. That single conversation re-shaped six months of roadmap and saved us a lot of money.”
NDA - Signed “I had a large project built that needed a very specific understanding and the project was executed perfectly. Great design, great code, no bugs and anything I needed was done incredibly professionally. I would highly recommend and I will definitely be coming back with my…”
$4,000 and above · 11 monthsClient review
NDA - Signed “We approached several sellers in our search to get an app developed for our Shopify store. I had a very clear idea in my mind what we wanted and, through [their] expert questioning, [they] absolutely 'got it'. This was further proved through delivery of a…”
$1,500-$2,000 · 4 weeksClient review
NDA - Signed “We're working on a Shopify app that retrieves book data from our API and helps online stores and booksellers create book listings faster. This time, we needed to improve the app design and fix functionality issues. In general, we're satisfied with the service and plan…”
$400-$600 · 3 weeksClient review
NDA - Signed “This was a special request where we needed to rush this development. [They] complied and finished everything at the agreed time, and even worked until 2AM [their] local time in order to finish this on time. [They] went the extra mile for us with this…”
Client review
NDA - Signed “[They were] very patient as we figured out exactly what we needed our app to do. [They were] able to get all the functionality we required, communicated well, and [were] upfront about the cost. We'll definitely be coming back for future projects!”
Client review
NDA - Signed “Absolutely fantastic work. This was a tricky app, and [they] did great work. [They] really know [their] way around Shopify and the process for developing a Shopify app, which was a great help to me! [They're] motivated and committed, and delivered a very high-quality app.…”
Client review
NDA - Signed “I am very pleased to have worked with [them]! [They were] very detailed and delivered me perfection in an app! I look forward to working with [them] again!”
$3,000-$4,000 · 2 monthsClient review
NDA - Signed “Amazing service. Amazing time. Took all input and made the site great even with minor changes along the way. Will certainly try to use again if I'm lucky enough to have [them] work with me again. Thank you for everything.”
Client review
NDA - Signed “Very fast and thorough. [They] did exactly what I asked and then went the extra mile to tie up a couple of loose ends. I'm really pleased with the speed and efficiency, and would certainly recommend [them]. Thank you for your help and highly professional…”
Client review
NDA - Signed “[They understand] the problem so well and deliver the results super quick. I'll not hesitate to say that I've found a gem. One thousand percent recommended!”
Client review
NDA - Signed “Very positive experience. [They are] diligent, hardworking, and [have] good communication skills. Highly recommended.”
Client review
NDA - Signed “[They were] very patient, [and] prepared to go the extra mile so I got the result I wanted. Highly recommended.”
Client review
NDA - Signed “The project was not easy, literally. [They] did hard work on our project and finished as expected. Would like to work on upcoming new features together. Thank you.”
Client review
NDA - Signed “[They are] reasonable, meticulous, [have] a great sense of design, and [are] very responsive. I really enjoyed working with [them] and [they] delivered a beautiful website for me.”
Client review
NDA - Signed “Extremely patient and did not stop until what I needed was delivered. Excellent partner to work with!”
Client review
NDA - Signed “I didn't expect such great service from someone I found without a referral. I got lucky and I hope to work with [them] again in the future.”
10 daysClient review
NDA - Signed “Bought this to create a website for my startup company. Results were above and beyond what I was expecting! Quick to answer, and always gave great input and ideas!”
Client review
NDA - Signed “We are very impressed with the service and the delivery and will use them again!”
Client review
NDA - Signed “Great work and completed exactly as requested!”
Client review
NDA - Signed “100% satisfied. Got more than expected.”
Client review
NDA - Signed “Great communication, great result.”
Client review
NDA - Signed “Thank you so much for such outstanding work.”
Client review
Ecommerce and retail FAQ
Answers on controls, integrations, and the boundaries of our role.
Yes. Several of the case studies on this page are public App Store listings rather than private apps, which is a different bar: review, performance budgets, embedded admin behaviour, and support for merchants you never speak to.
Audit before you add scope
Find the production risks before they turn into delivery work.
Bring us the commerce system that is not holding up
Tell us what exists and what is going wrong with it. Every engagement opens with a written review of what you have and a plan for what to build next.