Budget: 2000 UAH Deadline: 1 day
Good day, Alexander.
I have been developing websites for 15 years.
Can I see your website to assess the front-end work?
Budget: 2500 UAH Deadline: 3 days
Good day! I did exactly this kind of optimization for OpenCart — Delay JS through the first action listener (scroll/touch/mousemove), so that GTM and Google Tag load on event and all statistics remain intact, plus width/height on catalog images against CLS and fetchpriority=high on the main photo of the card under LCP. Everything with clean modifiers, without third-party plugins. Just let me know, is it the standard Journal theme or a custom template — this will determine where to intercept the output of images in the listing. I will complete it in 2-3 days and provide screenshots of PageSpeed before/after for mobile.
Budget: 3500 UAH Deadline: 2 days
Hello. I have extensive experience in speeding up websites. I am ready to collaborate.
Budget: 2500 UAH Deadline: 2 days
Hello! I am ready to take on the optimization of your OpenCart. I specialize in writing clean code, so all changes will be implemented strictly through OCMOD (or in a copy of the theme), without installing heavy paid optimization plugins.
Here’s how I will address your tasks:
Delay JS (GTM): I will write a lightweight vanilla JS script that will listen for events (mousemove, scroll, touchstart). GTM and other trackers will be initialized only after the first interaction. This will ensure that the main thread is unblocked and data collection is preserved.
CLS: I will specify width and height attributes for images directly in the .twig / .tpl templates of cards and listings. I will definitely check the CSS (presence of max-width: 100%; height: auto;) to ensure that responsiveness remains perfect.
LCP: I will add the attribute fetchpriority="high" for the main photo on the first screen and loading="lazy" for those below.
Answers to your questions:
Experience with Delay JS for GTM: Yes, I have it. This is a standard optimization pattern that I regularly use for deferred loading of heavy iframes, widgets, and analytics.
Completion time: 1-2 days. Coding will take a few hours, the rest of the time will be spent on debugging and running through PageSpeed Insights to consistently achieve scores >75 and CLS < 0.1.
Cost: 2500 UAH.
I guarantee compliance with all criteria (DoD) and preservation of layout functionality. I am ready to start immediately after access is provided!
Budget: 4500 UAH Deadline: 3 days
Good day. I have read the technical specifications; they are specific and clear: OpenCart in catalog mode with 2900 items, the server is already optimized for OpenLiteSpeed, and I need to work with clean code according to the template and modifiers for Core Web Vitals, specifically deferred loading of third-party scripts (GTM, Google Tag) until the first user action while maintaining full analytics, fixing CLS through strict width and height on catalog and card images, and prioritizing LCP through fetchpriority high on the main photo, without third-party optimization plugins.
I work with OpenCart and know the structure of templates and modifiers, so the changes will be made directly there, without touching the database. Regarding delay JS, the approach is as follows: we do not load analytics immediately but attach it to the first scroll, tap, or mouse movement, while initializing GTM correctly to ensure that statistics collection and advertising functionality are not lost. For CLS, I set image sizes so that space is reserved in the DOM before loading, and I ensure that CSS responsiveness is not broken. For LCP, I add fetchpriority to the main image of the first screen. Upon delivery, I will provide a screenshot and a link to a live PageSpeed Insights test, as you requested, for both mobile and desktop versions.
I would like to clarify: should the changes be made directly in the active theme, or do you want them specifically as OCMOD or vQmod modifiers to avoid touching the original theme files? And is the theme custom or one of the common ones, so I can estimate how clean the template code is?
Budget: 7000 UAH Deadline: 4 days
Good day!
I am responding immediately to your three questions:
1. Experience with Delay JS for GTM on OpenCart — yes, I have experience improving PageSpeed Insights scores specifically on catalog sites: delayed launch of GTM/analytics until the first interaction (scroll/touchstart/mousemove, with a fallback timer), while all events and data collection are preserved — the tag simply starts 2–4 seconds later, before the user clicks anything.
2. Timeline — 3–4 days, including testing on mobile.
3. Cost — 7000 UAH.
According to your specifications, the plan is as follows:
— Delay JS: a wrapper for GTM/Google Tag with activation on the user's first action — approximately minus 4 seconds of main thread blocking on mobile;
— CLS: I will specify width/height (aspect-ratio in CSS) for all images in listings and cards — space is reserved until loading, responsiveness is not broken;
— LCP: fetchpriority="high" for the main product photo + I will check that it does not fall under lazy load.
All changes will be strictly through OCMOD/theme copy, without third-party plugins, I will not touch the core. Delivery according to your DoD: live PageSpeed Insights report (mobile), Performance ≥ 75, CLS ≤ 0.1. If the metrics are not achieved — I will refine it at no extra charge.
Budget: 9000 UAH Deadline: 4 days
👋 Hello. My portfolio - 
Freelancehunt
I have extensive experience optimizing OpenCart for Core Web Vitals (GTM, CLS, LCP).
💼 I implement Delay JS by launching it after the first user interaction without losing analytics. I will fix CLS by setting image sizes in the template. LCP - by prioritizing the main image.
⏰ Deadline - 4 days.
💵 Budget - $200.
🚀 I take every project seriously and work towards results. I don't just close tasks; I bring the work to a state where the product looks high-quality, professional, and instills trust in clients.
Budget: 5000 UAH Deadline: 3 days
Hello! I have been working with OpenCart for 16 years. Often, the issue of optimizing page speed is more global - in the server, database, faulty modules, or poor layout.
Solving the task is not a problem. I have experience and have done it many times. I know the material without AI. I won't mindlessly insert scripts/code, as I know what problems may arise in the future. I usually perform all work through OCMOD. Therefore, I won't touch the structure, and it will be easy to revert my changes.
For a more accurate estimate - I need to see the patient, I will analyze it and be able to provide an exact price and timeline. As it stands, the price is approximate, as are the timelines. It could be faster - cheaper... we need to delve deeper.
Budget: 4000 UAH Deadline: 2 days
Hello! I will perform frontend optimization of your catalog on OpenCart strictly according to the provided specifications. All changes will be implemented with clean code through the modification system (OCMOD) or a theme copy, without installing third-party plugins. The layout, responsiveness, and logic of script operations (gallery, filters) will not be affected.
Answers to your questions:
- Experience with Delay JS for GTM: Yes, I have successful experience in configuring deferred loading of third-party scripts (including GTM and Google Tag) on OpenCart. Scripts are initialized strictly upon the first user action (scroll, touch, mouse movement). Data collection and analytics work are preserved at 100%.
- Deadline for task completion: 1-2 days from the moment access is provided.
- Cost of work: 4,000 UAH.
I fully accept the Definition of Done (DoD): I will provide a link and a screenshot from Google PageSpeed Insights (mobile version) with a performance score of 75+ points and a CLS metric in the green zone (up to 0.1).
I am ready to start as soon as possible. Please send the access details in private messages, and I will do everything neatly and clearly according to the checklist!
Budget: 3500 UAH Deadline: 3 days
Good day, I have been developing and maintaining websites on OpenCart for over 15 years. I am ready to carry out your tasks.
Budget: 4000 UAH Deadline: 4 days
Good day.
I am responding to your three questions:
1. Experience with Delay JS for GTM — yes. Approach: a JS wrapper that blocks the initialization of GTM until the first user action (scroll/click/mousemove). After it triggers — standard launch, analytics, and advertising are fully preserved.
2. Timeline — 3–4 days.
3. Cost — 4000 UAH.
Regarding the other tasks: I will address CLS through width/height in the listing and product card templates, and I will check that max-width: 100% in CSS does not break responsiveness. I will set fetchpriority="high" on the main product image. All changes will be made via OCMOD or a copy of the theme; I will not touch the core.
One clarification regarding the delivery criteria: I guarantee three specific points of the technical specification — Delay JS, CLS, and LCP. The overall PageSpeed score depends on the state of the entire site, so it would be worth reviewing the current report together before starting — to understand whether these changes alone will be sufficient for ≥75, or if there is anything else that might pull it down.
Budget: 4000 UAH Deadline: 3 days
Hello! I have practical experience specifically with this set of tasks on OpenCart — Delay JS via GTM, CLS, and LCP — all through OCMOD / theme copy, without paid optimization plugins.
Regarding your questions:
1. Yes, I have configured Delay JS for GTM on OpenCart. I launch scripts strictly on the first user action (scroll / tap / mouse movement), but I also set an additional safety timeout — to meet both of your requirements: to delay the launch and not lose any sessions. A pure interaction-only delay subtly "eats" bounce traffic (those who entered and left without interaction do not get into GTM), and the timeout addresses this. Thus, the collection of statistics and the performance of advertising are preserved in full.
2. Timeline: 2–3 working days with testing on mobile and PC.
3. Cost: 4000 UAH.
I will address CLS through width / height + aspect-ratio in styles — space for the photo is reserved, but responsiveness is not broken.
I am ready to take this on. Please send the link to the website — I will take a look and confirm the timeline.
Budget: 3000 UAH Deadline: 3 days
I will perform optimization according to the technical specifications (Delay JS, fixing CLS, fetchpriority, through OCMOD without third-party modules). After making changes, I will conduct testing in Google PageSpeed Insights and, if possible, achieve the target metrics. If there are limitations related to other elements of the site that are not included in the technical specifications, I will inform you about them separately.
