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Legacy System Support & Modernization
Support and targeted modernization for the business-critical software you already depend on.
Backend engineering & systems consulting
Practical software solutions for the systems your business depends on.
D. M. Leonhardt Consulting helps organizations improve legacy systems, integrate critical data, and build dependable backend software through focused project engagements.
The challenge
When important software becomes a business problem
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An existing system needs attention
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Your systems don't work together
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You need backend development capacity
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You know the outcome, but not the technical path
You don't need to arrive with the technical solution. Bring us the problem.
Services
Focused expertise for defined software projects
Learn more
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Systems Integration & Data Automation
Connect systems, move data reliably, and reduce manual work through practical automation.
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Backend Software Development
Dependable APIs, services, data-processing applications, testing, and documentation.
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System Discovery & Technical Assessment
Create a clear view of the current state, its risks, and practical next steps.
Our approach
Software should solve problems, not create new ones.
Technical decisions should support the work, the people doing it, and the organization that will own the result.
Pragmatic Solutions
The right technical solution is the one that responsibly solves the business problem. Recommendations should fit the requirements, existing environment, constraints, and future needs.
Client Ownership
Solutions should be maintainable, documented, and transferable so the client can confidently own what was delivered.
Experience
Experience built on real business systems
16+years professional software development experience
15+years direct software engineering experience
Regional + Nationalexperience with business-critical production systems
Core technologies
- .NET
- C#
- SQL Server
- REST APIs
- ETL & Data Integration
Selected work
Customer Management & Enterprise Integration
Backend architecture for an internal customer-management platform that consolidated operations across multiple connected systems, replacing a retiring third-party capability and simplifying account management for an internal support team.
View Selected WorkA clear process
How we work
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Discover
Understand before prescribing.
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Deliver
Build with visibility.
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Transition
Leave prepared to succeed.
Start a conversation
Bring us the problem.
Whether an existing system needs attention, important processes need to be integrated or automated, or a defined project needs backend engineering expertise, start with a conversation about what you're trying to accomplish.
Discuss Your Project