Legacy Shopify Store Rebuilds With Zero Downtime

Project Overview

Organization

An Australian electric solutions company (via agency partner)

Industry

Electric solutions / Energy storage

Location

Australia

Engagement Model

Task-based point system via agency partner

Products / Services Used

Shopify Development
Technical Audits
Performance Optimization
QA Testing
Ongoing Maintenance

The client sells tailored power, motion, and energy storage products - both off-the-shelf and custom-engineered. Their Shopify store was functional enough to trade, but structurally fragile: tethered to outdated, unstructured code that made every update a risk and every new feature an ordeal.

‍

A partner agency brought Mavlers in to fix what the existing codebase had made unfixable through conventional means, without taking the site offline to do it.

Performance Insights

Key results for the client

1,500+

Backlog points completed

100%

Approved enhancement requests delivered

0

Critical downtime incidents

Client Objectives

The structural risks of legacy technical debt

Talk to our team

1.

High system fragility

The site’s unstructured codebase meant that features were deeply interdependent. A fix in the product catalog often triggered unexpected regressions in the checkout flow, creating a "two steps forward, one step back" development cycle.

2.

Outdated architectural foundation

A lack of component separation and modern Shopify Liquid practices made the site static. It could not support the dynamic, custom-engineered solution queries required by the client’s industrial B2B audience.

3.

Proliferating scope

What began as incremental improvements evolved into a 1,500-point backlog. As we audited the system, layers of technical debt were uncovered, requiring a shift from simple bug-fixing to a comprehensive system refactor.

4.

Feedback loop friction

Hidden code dependencies meant that initial fixes often required multiple rework cycles. Without a structured testing framework, the agency faced high risks of deployment failure.

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Mavlers Strategy

How we stabilized and modernized the platform

Talk to our team

1.

Strategic priority tiering

We bypassed the "all-at-once" trap by categorizing the 1,500-point backlog into three distinct tiers: Urgent (Security & Checkout), High-Impact (UX & Navigation), and Enhancements (Future-proofing). This way, that capital was allocated to the most critical stability levers first.

2.

Component separation & code refactoring

To end the cycle of regressions, our Shopify experts began decoupling interdependent code. By modernizing the Liquid architecture and separating styling from logic, we created a modular foundation where future updates could be deployed without risking system-wide failure.

3.

Rolling QA & regression framework

We implemented a rigorous "Incremental Release" protocol. Instead of large, risky deployments, updates were pushed in small, tested batches. Every release was preceded by a full regression test to ensure that legacy dependencies remained intact.

4.

High-transparency point-based execution

To manage scope creep, we utilized a task-based point system. This provided the agency partner with a real-time "value-for-money" dashboard, showing exactly how resources were being spent and the specific impact of every resolved ticket.

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Results

What the client achieved

Mavlers didn't just solve problems - they provided a roadmap for stability and growth. Their expertise and proactive communication gave us the confidence to make informed decisions at every stage.

We move faster, optimize smarter, and help you outpace competitors with AI behind every move.

Project Lead

Agency Partner

Organization

An Australian electric solutions company (via agency partner)

Industry

Electric solutions / Energy storage

Services Used

Shopify, custom development

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About

The client sells off-the-shelf and custom-engineered power, motion, and energy storage products through a Shopify store that was functional but structurally fragile, built on outdated, unstructured code. A partner agency brought Mavlers in to fix it without taking the site offline.

Challenges

Interdependent, unstructured code meant a single fix often triggered unrelated regressions.
Outdated Shopify Liquid architecture couldn't support dynamic, custom-engineered B2B queries.
Incremental fixes grew into a 1,500-point backlog as technical debt surfaced.
Hidden code dependencies meant fixes often needed multiple rework cycles.

Goals

Stabilize the platform without taking the live store offline.
Refactor the codebase to stop regressions from compounding.
Give the agency partner clear visibility into scope and spend.
Deliver every approved enhancement request.

Solution/Approach

Brought in by partner agency: To fix the unfixable
Rebuilt without taking site offline: Zero critical downtime incidents
Completed backlog points: Cleared technical debt systematically
Delivered approved enhancements: New features without breaking existing functionality

Results

1,500+ backlog points completed
100% of approved enhancement requests delivered
0 critical downtime incidents

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Legacy Shopify Store Rebuilds With Zero Downtime

Project Overview

Key results for the client

The structural risks of legacy technical debt

How we stabilized and modernized the platform

What the client achieved

Mavlers didn't just solve problems - they provided a roadmap for stability and growth. Their expertise and proactive communication gave us the confidence to make informed decisions at every stage.

About

Challenges

Goals

Solution/Approach

Results

Results that speak for them selves.

Migrating 9,000+ pages across 12 languages

80% CPR reduction and 3x ROI over 6 years

35% cost reduction while scaling SEO delivery globally

Ready to rebuild without disruption?

Get in touch with us.

You’re all set!

Results that speak for them selves.