Lifeguard
Essential Designs was able to create a cutting edge application that will save lives, they always say "Anything can be done" and are definitely able to deliver on that promise.
Jeff Hardy, Founder
Rebuild the Software
Your Business Still Runs On
A lot of important companies still depend on old internal software: slow platforms, aging servers, outdated programming languages, fragile databases, and systems only a few people understand.
We help rebuild legacy software into modern platforms with better performance, cleaner data access, cloud-ready infrastructure, AI-ready workflows, and a migration path that respects the business already running on the old system.
★★★★★ 5.0 average rating from 100+ reviews
Google
5.0 ★★★★★
46 reviews
Clutch
5.0 ★★★★★
34 reviews
DesignRush
5.0 ★★★★★
30 reviews
Trusted by 100+ businesses worldwide
From startups to enterprise teams
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Our Clients
Making hundreds of businesses
better, big or small.
Teck Resources
We've been engaged with Essential Designs for several years now and we've found that the value they deliver is significantly above everyone else that we deal with.
Rick Twaddle, SBA
Schneider Electric
We are a company present in more than 150 countries. I was very happy with their efficiency. They were responsive and happy to make any changes that we required.
Kirill Kudymov, Product Manager
Handld
I had a lot of trust in them, everyone knew their job, and they worked very efficiently. The trust and communication skills were what distinguished them from their competitors.
Cristen Phipps, Owner
Process
The Essential Legacy Modernization Process
A practical way to rebuild business-critical software without losing the knowledge, data, and workflows inside the old platform.
01
System Discovery
We review what the legacy system does, who uses it, where the data lives, and what breaks or slows down today.
02
Risk & Data Mapping
We identify migration risks, integration points, reporting needs, old-server dependencies, and critical workflows.
03
Modernization Plan
We decide what to rebuild, what to retire, what to integrate, and what should move in stages.
04
UX & Workflow Design
We redesign the experience around current users, better data access, and the way the business works now.
05
Rebuild & Migration
We build the modern platform, migrate data carefully, test real workflows, and reduce launch risk.
06
Post-Launch Support
We help stabilize the new system, improve performance, and add new capabilities after the team has adopted it.
If the old system still runs the business, modernize it carefully .
The goal is not to throw away what works. It is to rebuild the platform around the workflows, data, and people the business already depends on.
Plan a Legacy Rebuild
Legacy software modernization
Old internal software often carries more business value than anyone wants to admit.
This page is for teams that cannot simply abandon an old platform because it contains the workflow, data, rules, and operational knowledge the business still needs.
01
Keep the business logic
A rebuild should preserve the rules and workflows that matter while removing the technical constraints that make the old system hard to support.
02
Make the data usable again
Modern platforms can make data easier to search, report on, connect to other tools, and prepare for AI-assisted workflows.
03
Move off fragile infrastructure
We help plan the shift away from old servers, unsupported frameworks, brittle deployments, and single-person knowledge risk.
Legacy rebuild questions
A good rebuild protects what the old system knows while removing what holds it back.
Essential Designs helps companies rebuild internal platforms with modern planning, UX, development, QA, data migration, and support.
20+
Years building custom software
100+
Client reviews
Modern
Stack, hosting, UX, and data access
Staged
Migration and launch planning
Do we need to rewrite the entire legacy system at once?
Not always. Many rebuilds are safer when the highest-risk or highest-value workflows move first, then the rest follows in planned stages.
Can you migrate data from the old system?
Yes. We can review the current database, exports, files, and reporting needs, then plan data cleanup and migration as part of the rebuild.
Can the new platform include AI features?
Yes, when they are useful. A modernization project can prepare data and workflows for AI-assisted search, summaries, triage, reporting, or decision support.
Selected Work
See the kind of apps and platforms we build.
A quick look at real mobile apps, web platforms, SaaS portals, and business systems from the Essential Designs portfolio.
Emerson Electric
Mobile AppModernized field operations app with dashboards, alerts, reporting, and low-data workflows.
Field operations modernization
Teck Resources
Web AppResponsive EHSC application for on-site safety checks and reporting.
Enterprise safety software
Lifeguard
Mobile AppGroundbreaking safe-consumption platform with emergency response workflows.
Life-saving mobile app
Good Roads
Web PlatformVendor database and technical-services portal for government procurement workflows.
Procurement SaaS portal
Honeywell
Web AppGlobal license-key management software for a complex enterprise workflow.
License management system
All Skin
Mobile AppPersonalized skincare app using product data, surveys, and routine analysis.
Personalized product matching
Legacy Rebuilds For Business-Critical Software
Legacy System Audit
Review the current platform, users, data, hosting, integrations, codebase, support risk, and business-critical workflows.
Modern Stack Rebuilds
Rebuild old desktop, web, database, or server-based tools into modern software that is easier to maintain and improve.
Data & Reporting Access
Make important data easier to find, report on, export, integrate, and use in daily decisions.
Cloud Migration & Support
Move carefully away from old servers with a hosting, security, testing, migration, and support plan.
Helpful resources
Helpful Legacy Modernization Resources
These resources support teams comparing rebuild risk, custom software scope, data migration, and modernization planning.
Read the guides
The Challenges of Legacy System Modernization A practical overview of modernization risk, planning, and migration decisions. What Is An FSD? How functional specifications help capture business rules before a rebuild begins. Enterprise Application Development Services Planning guidance for teams building business-critical internal applications.
The Essentials of Legacy Software Modernization
Legacy software is rarely just old code. It often contains years of business rules, customer data, operational habits, and exceptions that the company still depends on.
That is why a rebuild needs more than a new interface. The project has to capture what the old system does, where the data lives, who relies on it, and which workflows cannot be interrupted.
Modernization can improve performance, security, maintainability, reporting, integrations, hosting, and user experience. It can also prepare the platform for AI-assisted features when the data and workflow are ready.
The safest path is often staged. Rebuild the most valuable workflow, migrate carefully, test with real users, then continue replacing the parts of the old platform in a controlled way.
We help teams plan that path so the new platform is faster, easier to support, and better aligned with how the business works today.
Modernize the platform without losing the business knowledge inside it.
A legacy rebuild should keep the useful logic, improve the data, reduce infrastructure risk, and give the team a platform that can evolve again.
