Legacy System Modernization Company in Chicago

QServices offers legacy system modernization services in Chicago, working with insurance, manufacturing, logistics, and FinTech firms across Illinois. We are not headquartered in Chicago, but we run remote engagements with 3 to 4 hours of daily CT overlap. QServices is a remote-first Microsoft Solutions Partner serving Chicago businesses that need to move off aging codebases.

What Chicago buyers typically need from legacy system modernization

Chicago's four primary industries each carry legacy software debt in distinct forms:

• Insurance (Illinois DOI-regulated): Policy administration systems built on VB.NET or early ASP.NET, often 15 to 20 years old, with business rules hard-coded into stored procedures. The Illinois Department of Insurance requires that any re-platforming preserve audit trails and claims data integrity end-to-end. Moving to a modern stack without breaking existing audit history is one of the most underestimated parts of insurance modernization.
• Manufacturing: On-premise ERP and production-scheduling systems that predate cloud APIs. Adding Azure-based reporting or IoT sensor integration is not possible without a modernization layer separating the legacy core from new services.
• Logistics: Dispatch and routing platforms built on aging .NET Framework, unable to connect to modern broker or carrier APIs. Performance under peak load is an operational risk, not a future concern.
• FinTech: The Illinois Biometric Information Privacy Act (BIPA) applies to any platform collecting biometric data, including authentication flows. Older codebases often lack the consent management and deletion workflows BIPA mandates, making modernization a compliance obligation rather than an optional upgrade.

The most common pattern across all four industries is a monolith extended over a decade until no single developer understands all of it. A strangler-fig migration, extracting one bounded context at a time, carries far less risk than a big-bang rewrite and is the approach we use in nearly every engagement.

How we work with Chicago clients

Our engineering team is based in India on Indian Standard Time (IST). Central Daylight Time (CDT) is 10.5 hours behind IST, so when your team starts the workday at 9 AM CDT, our engineers are at 7:30 PM IST. We schedule standups, architecture reviews, and live demos in that 9 AM to 12 PM CDT window, giving both sides 3 to 4 hours of synchronous time each working day.

Outside that window, work continues asynchronously. Sprints run on two-week cycles. Every Friday CT, we post a written summary covering what shipped, what is blocked, and what comes next. Code review happens on GitHub with comments addressed before the next standup cycle. Communication runs through Microsoft Teams or Slack, whichever the client prefers.

We do not have a Chicago office. For large engagements, an on-site milestone review can be arranged on request. Our HITL (Human-in-the-Loop) governance means a senior QServices lead reviews every architectural decision before it lands in production, so you are not dependent on any single developer's judgment across a 10-hour time gap.

Relevant work in similar markets

We do not have a named Chicago client. The two engagements below are the closest matches to Chicago's primary industries.

Manufacturing: Global EHS Platform, VB.NET to .NET 8

A global Environmental Health and Safety software company came to us with a VB.NET monolith managing incidents, training records, scheduling, and management of change across international sites. We migrated it to .NET 8 and React on Azure using a component-by-component approach. The outcome was improved scalability, maintainability, and global performance across all modules. This is the same pattern most Chicago manufacturers face: a production monolith that has become too expensive to extend.

See more on our manufacturing modernization page.

FinTech: Stock Analytics Platform, ASP.NET to Azure

An investment analytics company needed to replace manual spreadsheet workflows with a role-authenticated dashboard on Azure, including automated scraping and real-time financial metrics. We built on ASP.NET MVC and .NET Core with Entity Framework and SQL Server. The result was a categorized stock classification system with P/E ratios and earnings schedule tracking. Chicago FinTech firms dealing with fragmented financial data workflows will recognize this problem.

What legacy modernization costs for a typical Chicago project

All pricing is in USD. Typical engagements run 16 to 52 weeks. See the full breakdown at legacy modernization pricing.

• Single module extraction ($60,000 to $120,000): One bounded context migrated via strangler-fig. Covers assessment, migration, API gateway setup, and handoff documentation. The right entry point for a first modernization phase in a manufacturing or logistics system.
• Multi-module or subsystem migration ($120,000 to $250,000): Several services decoupled from the monolith, with data integrity rule migration and integration surface mapping included.
• Full platform modernization ($250,000 to $500,000): End-to-end re-platform over 9 to 12 months, covering all modules, data migration, and a post-go-live support retainer.

Illinois-regulated work, including systems subject to BIPA or Illinois DOI audit requirements, typically adds 15 to 25 percent for compliance overhead: consent workflow design, data deletion pipelines, and documentation for regulatory review. Each non-trivial system integration adds $3,000 to $12,000. We provide a fixed scoping document before any work begins so cost boundaries are clear from the start.

How to start working with us

1. Discovery call (30 minutes): We ask about your current stack, the pain points, and your timeline. No sales pitch, just scoping questions.
2. Scoping document: We send a written scope within 5 business days: approach, timeline estimate, team structure, and a fixed price range.
3. Project start: Once the scope is agreed, we kick off within 2 weeks, starting with a codebase audit and stakeholder interviews.

Use the form below to book a discovery call or send initial questions directly. We respond within one business day.

Do you work with Chicago companies remotely?

Yes. All of our Chicago engagements run remotely. Our team operates on IST with 3 to 4 hours of live daily overlap with CT business hours (9 AM to 12 PM CDT). We use Microsoft Teams or Slack for communication and GitHub for code review. There is no on-site requirement for standard engagements.

For data residency: we deploy on Azure US regions (East US, Central US), keeping all client data within the United States. For systems subject to Illinois BIPA or Illinois DOI requirements, we design the data architecture so regulated records remain in Azure US regions from the first sprint. We do not store client application data on QServices-owned infrastructure.