Migration of a large e-commerce from the old OpenCart

Budget: 2000 EUR Deadline: 90 days

Hello!

My name is Evgeny, and I have been professionally developing mobile applications, websites, web services, and web applications for 7 years.

*The cost I indicated is for 1 hour of work. To provide a more detailed price, I would like to connect/call and discuss the details.

- You can review my portfolio, feedback, and awards in my profile.

Why should you choose me?
- I have taken 1st and 2nd places in international championships and competitions in the IT field.
- I have verified video testimonials and letters of appreciation.
- I am always available, honest, and reasonable.
- I work under a contract.
- I lead my own development team.

I would be happy to talk to you in more detail about the project. Expand

Budget: 1000 EUR Deadline: 10 days

Migrating an e-commerce site from an old OpenCart requires attention and experience. I specialize in the development and optimization of e-commerce projects on OpenCart and can ensure a smooth transition of data and functionality.

In my work, I will consider the preservation of products, categories, orders, as well as user accounts. Using OpenCart guarantees stability and flexibility.

I work at a rate of $15/hour.

Budget: 1000 EUR Deadline: 10 days

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Budget: 555 EUR Deadline: 22 days

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Detailed discussion, advice, preferences, evaluation in personal discussions!

Sincerely, Vasily... Expand

Budget: 2000 EUR Deadline: 90 days

My main advantage is understanding not only OpenCart but also the architecture of large e-commerce sites with high loads and a significant number of custom modifications. In such tasks, it is critically important not just to migrate the site but to preserve business processes, operational stability, and search rankings. Before starting, a technical audit of the current store will be conducted, analyzing load, database structure, integrations, and custom functionality, after which I will propose the optimal stack specifically for your scale and growth prospects. If the store has complex logic and large volumes of data, it is advisable to consider Magento 2 or Shopware. If speed of support and budget optimization are important, a modern OpenCart 4 with the correct architecture and caching is possible.

During the migration, the new store will be deployed in parallel without stopping the current site. This will allow testing functionality, performance, and SEO before switching the domain. Special attention will be paid to database optimization, caching, server tuning, and eliminating bottlenecks that cause the site to crash under load. After optimization and stress tests, the store should reliably handle 300 - 500 concurrent users with fast page response.

Work plan:

1. Technical audit of the current store and infrastructure.
2. Analysis of the database, load, and custom functionality.
3. Selection and justification of the new stack.
4. Deployment of the testing environment and new platform.
5. Migration of products, customers, orders, and SEO structure.
6. Transfer of design and adaptation of functionality.
7. Integration of CRM, 1C, payments, and deliveries.
8. Optimization of the database, caching, and server environment.
9. Conducting stress tests and performance testing.
10. Launch without downtime of the store.
11. Handover of documentation, Git repository, and post-release support. Expand

Budget: 4600 EUR Deadline: 40 days

Good day.

According to your description, this is no longer just a task of "updating OpenCart to a new version." It concerns a large online store that has evolved over the years into a complex eCommerce system with data, integrations, SEO history, custom logic, and load.

Therefore, we would suggest considering the project not just as a migration to a new engine, but as a technical restructuring of the store on the right architecture.

In such projects, it is important not just to "move," but to:

- separate the core business logic from templates and modules;
- properly design the catalog, filters, attributes, SEO-URLs, import/export;
- isolate integrations with payments, deliveries, CRM/1C into a separate stable layer;
- implement caching, queues, indexes, database optimization, and scaling;
- preserve SEO weight and URL history;
- create a system that can be maintained by an in-house team, not just the author of the old modifications.

The platform should be chosen after an audit. In some cases, OpenCart 4 with the correct architecture of modules and optimization is sufficient. In others, Magento 2 / Shopware / Laravel-based eCommerce / headless approach with a separate frontend is better. Decisions should be made not "by the name of the engine," but based on the actual structure of the business, the volume of the catalog, integrations, and load.

We can enter the project in the format of:

1. Technical audit of the old store
Code, database, modules, slow queries, integrations, SEO structure, server, bottlenecks.

2. Architectural design of the new system
Choosing the stack, describing the structure of modules, data, integrations, caching, deployment, migration, and SEO relocation.

3. Parallel development of the new version without downtime of the old store
The old version works, the new one is built separately, tested, filled with data, and undergoes load checks.

4. Migration of data, SEO, and integrations
Products, categories, customers, orders, reviews, URLs, meta-data, redirects, sitemap, robots.txt, microdata.

5. Performance optimization
Database, indexes, caching, PHP-FPM/Nginx/MySQL tuning, Redis/Memcached, queues if necessary.

6. Project handover
Git, documentation, deployment instructions, integration scheme, instructions for the internal team, warranty period.

ViACore can act not just as a migration executor, but as a technical team that helps restructure the store to make it stable, fast, maintainable, and ready for further development.

Team website:
https://viacore.group Expand

Budget: 3800 EUR Deadline: 42 days

Hey Andriy,

Read the spec. Two separate problems here: the migration itself, and the performance collapse at 100+ users. Most bids will focus on the first and
hand-wave the second. I'd argue the performance problem is actually the harder one to solve properly, and it's the one that determines whether the new
platform survives or just crashes at a higher user count.

On platform choice:

I'd push back on OpenCart 4. You're migrating away from OpenCart because it's causing problems. Moving to a newer version of the same ecosystem means
inheriting the same architectural limitations that got you here. The plugin ecosystem is smaller, community support is shrinking, and you'll be back in
this situation in 3-4 years.

My recommendation: WooCommerce on a properly optimized stack, or a headless setup (Next.js frontend + WooCommerce/Medusa as the commerce backend).
Here's why:

WooCommerce gives you the largest plugin ecosystem for payments, delivery, 1C/CRM integrations. The admin panel is familiar to most teams. The
performance problems WooCommerce is known for are solvable with proper caching architecture (Redis object cache, Nginx FastCGI cache, offloading heavy
queries to async workers). I've done this optimization work before.

If you want something more future-proof: headless Next.js frontend with a commerce API backend. Faster page loads by default (static generation for
catalog pages), better scalability, but higher initial development cost and your team needs to be comfortable maintaining it.

On performance (the part most bidders will underdeliver on):

Before migration I'd audit your current slow query log to understand what's actually killing you. Often it's 2-3 queries that account for 80% of the
load. After migration, the architecture would be:

Nginx with FastCGI/proxy cache for anonymous users (most catalog traffic). Redis for sessions and object cache. MySQL/MariaDB with proper indexing
(composite indexes on the actual query patterns, not just primary keys). PHP-FPM pool tuning matched to your server RAM. Heavy operations (order sync
to 1C, bulk imports) offloaded to Redis Queue so they don't block the web workers.

Two questions before I lock the timeline:

1. What's the current OpenCart version and roughly how many products/SKUs?
2. Do you have a list of the custom modifications and integrations (1C, CRM, payment gateways)? That's what determines whether t Expand

Budget: 4000 EUR Deadline: 40 days

Good day!
I am ready to take on a comprehensive task — migrating a large store from the old OpenCart to a modern engine + deep performance optimization.
I understand the scale of the problem: a large volume of data, many custom modifications, critical importance of zero downtime and preserving SEO.
Proposed solution:
Recommended stack:
OpenCart 4.1+ (the most optimal migration path)
Modern fast theme on Twig + Bootstrap 5 / Tailwind
Redis (object cache + session) + Varnish / Nginx FastCGI Cache (full page cache)
MariaDB 10.11+ with optimized indexes
Queue system (RabbitMQ or Redis Queue) for heavy processes
Docker + CI/CD
Alternative (if greater scalability is needed): Shopware 6 or Sylius (Symfony) — I can justify depending on your priorities.
What will be done:
Migration without downtime
Parallel deployment of the new version
Full data transfer (products, orders, customers, SEO)
301 redirects, preserving all URLs
Phased traffic switching
Performance optimization
Database audit + optimization of all slow queries
Cache configuration (Redis + Full Page Cache)
Server tuning (Nginx + PHP-FPM + MariaDB)
Moving heavy logic to queues
Stress testing (before and after) — goal 300–500+ concurrent users
Documentation and handover
Complete technical documentation
Git repository with a clean history
Instructions for your team
1 month of warranty support
I am ready to conduct a detailed audit of the current site (for free) and provide an accurate estimate + migration plan within 2–3 days after receiving access.
To start working, please provide:
Link to the site
Access to hosting/server (for audit)
Number of products, orders, and approximate peak online
Most critical custom modules
I look forward to your response. Ready for serious and quality work.
Sincerely, Expand

Budget: 1000 EUR Deadline: 14 days

Hello. I am the CVO of Echocode.
Our team has 8 years of experience in developing high-load web systems and large-scale turnkey e-commerce projects.
Our tech stack for the project: PHP (Laravel/Magento/OpenCart), Node.js, MySQL/PostgreSQL, Redis, RabbitMQ, Docker, Figma (for precise 1-to-1 design conversion).
Please write to me privately, and we will discuss the specifications for a more accurate budget and timeline assessment.

Budget: 111 EUR Deadline: 1 day

Good evening, Andriy.
Write, we will discuss.
What version of Opencart is currently?