Add-ons for custom business logic
New store or marketplace features: calculations, restrictions, process automation, and specialized workflows.
Custom add-on development
for CS-Cart
We develop new add-ons or adapt existing CS-Cart functionality to your business needs without changing the platform core, with future upgrades in mind.
CAPABILITIES
What we do
These are the situations clients most often bring to us.
External service integrations
Data exchange with 1C, CRM, shipping providers, payment services, supplier APIs, and other systems.
Storefront and admin improvements
Changes to the catalog, product pages, checkout, seller accounts, and administration panel.
Developing existing add-ons
Fix bugs, expand functionality, adapt to new CS-Cart versions, and remove core modifications.
SITUATIONS
When should you get in touch?
These are the situations clients most often bring to us.
The add-on you need is not in the CS-Cart marketplace
Off-the-shelf tools do not cover your business logic. We can build an add-on for the specific task, with an agreed price and schedule.
You need a 1C, CRM, or logistics integration
We have implemented dozens of integrations with external systems. Describe yours and we will assess feasibility and timing.
An add-on stopped working after a CS-Cart upgrade
Core modifications are often the cause. We use supported extension mechanisms such as hooks and events so the implementation is easier to maintain across upgrades.
A contractor disappeared or a studio delayed delivery
We work under an agreement with a defined schedule, so the planned delivery date is known before work begins.
PROCESS
How we work
Review the task and respond
Describe the task; we will assess its cost and timing at no charge.
Price agreed before work begins
No unexpected add-on charges for the agreed scope
Agreement
We document scope, price, and schedule before development.
Work warranty
We fix defects in our delivered work at no charge.
WORK EXAMPLES
Examples of delivered add-ons
Commerce and customer experience
01
EU Energy Compliance
Adds energy-efficiency fields, energy label and data sheet uploads, and displays this information on product pages.
Learn more 02Reward points extension
Adds welcome points on registration and limits the portion of an order customers can pay with points.
Learn more 03Selling products through ChatGPT
Generates an OpenAI-ready feed from the CS-Cart catalog for ChatGPT discovery and OpenAI Commerce scenarios.
Learn moreExtending CS-Cart functionality
01
RMA image attachments
Adds photo uploads to return requests so customers can show the reason for a return.
Learn more 02Instant smart search with autocomplete
Shoppers see relevant products as they type and can reach a product page more quickly.
Learn more 03Multiple option selections
Lets shoppers select multiple values within a product option in CS-Cart or Multi-Vendor.
Learn moreDescribe the task and we will provide a free estimate within 24 hours.
REVIEWS
What clients say
★★★★★
We worked with Anton on a CS-Cart project, and I can recommend him. Finding a developer who knows this platform and is willing to untangle what others left behind is not easy: many refuse to get involved or give up partway through. Anton helped with every task, investigated the issues, and saw them through. We will work with him again!
★★★★★
I highly recommend Anton and his company. It is very difficult today to find structured, dependable, honest, and proactive contractors. We found one! Anton is helping us improve our service, and we are very happy with this partnership!
★★★★★
We have been working with Anton on our project for quite some time.
The tasks are far from routine.
Even so:
✓ everything is delivered strictly according to the brief
✓ deadlines are met without delays
✓ we also get thoughtful recommendations that improve the outcome
I recommend him as a contractor you can trust with complex, unusual tasks.
★★★★★
Thank you, Anton, for the work! Every item in the brief was completed precisely: variation buttons were added to the desktop and mobile catalog, and attributes were displayed with icons. A “Show options” button was added on the mobile product page. The captcha was hidden and the old robots.txt was removed. Thank you also for the logic connecting options to the “with installation” variations. I am pleased with the work!
★★★★★
I especially want to thank Anton for technical support and development of my platform. It is rare to find a specialist who understands you immediately and does not shy away from unusual tasks. I brought him all kinds of changes, from small UI fixes to complex calculation logic, and everything was completed well and on time. I value his approach and his personal qualities. I wholeheartedly recommend him as a reliable technical partner and a pleasure to work with.
★★★★★
We worked with Anton every day for over a year. You can confidently reach out if you need someone who can quickly understand tasks, analyze and correct another person’s code, and solve problems across different areas.
He is dependable and committed, with good communication and feedback. He gives realistic estimates without inflating hours and tracks his time responsibly. When a detailed brief is not possible, he works through unclear points independently, asking useful questions without making careless assumptions.
We would be happy to work with him again when there is a suitable ongoing volume of tasks.
B2B
Read on Yandex →★★★★★
A good developer who completes tasks on time. Anton finds excellent, reliable solutions 👍
★★★★★
We work with CS-Cart. Every item in the brief is delivered on time and to a high standard.
★★★★★
We are working with Anton on a CS-Cart project and the integration of our online store with a mobile app. Every task is handled professionally, with attention to detail and a solid understanding of the technical side of the project. We can always discuss questions promptly and find the best solution. We are fully satisfied with the results and plan to continue working together. Definitely five stars!
АБ
Read on Yandex →FAQ
Frequently asked questions
Cost depends on complexity, external integrations, and testing scope. After discussing the task, we give a fixed price rather than an hourly estimate. Customizations typically start at $117; complex integrations start at $467.
A simple customization takes roughly 2–4 days; a complex integration takes 1–3 weeks. We agree exact timing before starting and document it in the agreement.
Not necessarily. We use supported CS-Cart extension mechanisms—hooks, events, and schemas—without core changes. Compatibility with a new version should still be checked during an upgrade.
Often, yes. Extending or fixing an existing add-on can be faster and cheaper than replacing it. We review its code before estimating.
Yes. We fix defects caused by our delivered work without charge. The warranty period and terms are documented in the agreement.
LET’S GET STARTED
Describe your task — we’ll estimate it within 24 hours
We’ll explain what is feasible and estimate the timeline and cost — free of charge and with no obligation.
- Fixed price before work starts
- A contract for every project
- Work warranty