The big-bang rewrite
Rebuilding everything at once takes years and risks the business. We change in steps.
Home / Technology / Application modernization
Application modernization · Legacy software · USA and Canada
Application modernization services for legacy software
PromotEdge International offers application modernization services for businesses in the USA, Canada and other markets. We assess legacy apps, then move, update or rebuild them in planned steps: new frameworks, cloud hosting, APIs and modern interfaces, with your data and daily work protected. Our delivery team is in India.
Old software brought up to date in steps, while the business keeps running on it.
In short
Legacy software usually still does its job. The trouble is everything around it: unsupported versions, hard-to-find skills, no API and screens nobody likes. We modernize the parts that hurt most first, and keep the rest running.
Application modernization services we offer
From one upgrade to a full rebuild, chosen part by part.
| Service | What you get |
|---|---|
| Assessment | What the app does, how it is built, what it depends on and where the risk is. |
| Modernization plan | For each part: keep, rehost, replatform, refactor, rebuild or replace, with the order and reasons. |
| Framework and version upgrades | Code moved to supported versions of its language and framework. |
| Cloud move | The app moved off old servers, changed as little or as much as the plan says. |
| APIs around the old system | A modern API in front of legacy code, so new tools can use its data. |
| New interface | Old screens redesigned for today's browsers and phones. |
| Data migration | Data moved and checked, with old and new running side by side while you test. |
| Step-by-step replacement | Parts rebuilt one at a time, switched over when each is proven. |
Part of our software development company work.
Brands we have worked with
- Fine Organics
- Weichai
- Novozymes
- Dozco
- SANY
- Prezent
- Honest AI
- SCENNE
- Sara International
- Vega MPS
- Desi Machine Pvt. Ltd.
Work delivered from India. Results are shared one to one, under NDA.
- Since 2015
- Round the clock, as per your location
- 4 pillars
- We travel to our clients every 3 to 4 months
Talk to us
Tell us what you need
We use these details only to reply to you.
Rather talk now?
How we work
- 01
Tell us the goal
A rough note through the form on what you sell and what needs to change.
- 02
We study your market
How people find you today, where inquiries get lost, then a call in your working day.
- 03
A written plan
The work, who does it and how it is measured. Nothing starts until you approve it.
- 04
The work starts
Our team in India does the work, with calls set in your working hours.
- 05
Reports and visits
Every number we report shows its source and date range, and we travel to our clients every 3 to 4 months.
Industries we serve
- ManufacturersMarketing for manufacturers
- LogisticsMarketing for logistics
- FinanceMarketing for finance
Common challenges
Why modernization projects stall, and what we do about it
Typical situations, not results from a named client.
Hidden business rules
Old code holds rules nobody wrote down. We find them before we change anything.
Data that will not move cleanly
Years of odd records break migrations. We test with copies of real data first.
Users who liked the old way
A new screen nobody asked for slows people down. We involve the people who use it daily.
How we work
How a modernization project runs
- 01
Assess
Code, data, hosting, users and the business rules hidden in the software.
- 02
Choose per part
Not everything needs rebuilding. Each part gets the lightest change that fixes its problem.
- 03
Protect the data
Backups, test copies and checks before any data moves.
- 04
Change in steps
One part at a time, with the old version available until the new one is proven.
- 05
Hand over
Documentation and a team who can maintain the result, ours or yours.
What application modernization services cover
Legacy application modernization updates old software so it is supported, secure and able to connect with the tools you use today. The options run from light to heavy: rehost (move it as is), replatform (move it with small changes), refactor (improve the code), rebuild (write it again) or replace (switch to a product that already exists).
The right answer is often different for each part of the same app. Modernization is one part of a wider plan; see our digital transformation consulting page for that. For new software built from scratch, see our web application development company page.
Cost
What application modernization costs
There is no public price list, because the cost follows the job.
What affects the cost
- How large and old the app is
- How much data has to move
- Which option each part needs
- How long old and new must run side by side
How we price
We start with a paid assessment, so the quote for the work is based on what we find. You see the scope and the fee in writing before work starts.
Questions buyers ask us
An assessment, a plan for each part of the app, version upgrades, a cloud move, APIs around the old system, a new interface, data migration and step-by-step replacement.
Often not. Many apps need only an upgrade, a move to the cloud or an API in front of them. We recommend the lightest change that fixes each problem.
We plan the work so the business keeps running: one part at a time, with the old version kept until the new one is proven.
Yes. The assessment is how we learn it, including the business rules that were never written down.
Avijit Bhattacherjee leads our website coding team, front end and back end. We are available round the clock, 24x7, as per your location, and we travel to our clients every 3 to 4 months.
Tell us what is not working
A real person reads every message and replies.
Guides on this topic
- Guides
How to modernize legacy applications without a big-bang rewrite
The tempting way to modernize an old application is to rebuild it from scratch and switch over on a chosen day. It is also the riskiest: the new system has to match years of undocumented behavior at once, and the business stops if it does not. The safer way replaces the application piece by piece while it keeps running. This guide sets out that method, step by step. It is part of our guide to legacy system modernization.
- Guides
Legacy system modernization: strategies and risks
Most businesses run on some software that is older than it should be: a system written by someone who left, a database nobody dares upgrade, an application that only runs on one server. It works, so it stays, until it blocks a new product, fails an audit or breaks. Modernization fixes that without stopping the business. This guide explains when to modernize, the seven common strategies, the risks and how to choose. It is the main guide in our modernization series.
All our services
Four kinds of work. One plan.
Strategy
- Brand strategyKnow what you stand for
- Marketing strategy consultingA plan before you spend
- Digital transformation consultingProcesses that run on software
- AI consultingWhere AI pays off for you
- CTO as a serviceTechnical leadership, part-time
All strategyShow fewer
- India go-to-marketFor companies outside India
Technology
- AI automationHours back for your team
- AI agentsSoftware that does the task
- AI chatbotsAnswers day and night
- Outsource web developmentYour code, our team
- Hire developersEvery role, by the month or the hour
All technologyShow fewer
- Staff augmentationExtra developers for your team
- Web app developmentSoftware your team uses daily
- Mobile app developmentApps for iPhone and Android
- CRM implementationOne record of every customer
- AnalyticsNumbers you can trust
- SaaS developmentYour product, built and run
- API integrationYour systems talking to each other
- MVP developmentA first version you can sell
- Software testingBugs found before your users do
- DevOpsReleases that ship without drama
- Software maintenanceUpdates, fixes and support
- Application modernizationOld systems made current
- Power BI consultingDashboards your team reads
- AI integrationAI inside the tools you use
- Custom CRM developmentA CRM built around your sales
Marketing
- SEO servicesGet found by buyers
- Local SEOCalls from nearby customers
- AI SEOShow up in AI answers
- Technical SEOA site search engines can read
- Content marketingArticles that bring in buyers
All marketingShow fewer
- Paid socialAds where your buyers scroll
- LinkedIn adsReach decision makers
- Email marketingEmails that bring buyers back
- Conversion rate optimizationMore inquiries from the same visits
- Ecommerce marketingMore orders for your store
- Influencer marketingCreators your buyers follow
- Lead generationQualified inquiries, not just clicks
- App store optimizationGet your app found and installed
- Social media optimizationSocial that supports sales
- Amazon adsProfit on Amazon, not just sales
- White label for agenciesDelivery behind your agency
Designing
- Website designSites that bring in leads
- WordPress websitesSites your team can edit
- Shopify developmentStores that sell across borders
- Ecommerce website designCustom stores beyond Shopify
- Brand identityLogo, colors and voice that match
All designingShow fewer
- UI and UX designScreens people find easy
- Landing page designOne page, one action
- Website maintenanceUpdates, fixes and backups
- Website redesignA new site without losing rankings
- Creative designCampaigns, motion and collateral
- White label web developmentBuilds under your agency's name