So Paulo, Sao Paulo, Brazil
$20/hr · Starting at $50
I specialize in maintaining and improving legacy systems built with C# and ASP.NET. With over 5 years of professional experience — including 3 years focused specifically on enterprise desktop and web
SPRINGFIELD, Illinois, United States
$200/hr · Starting at $200
Ibm z-OS and legacy systems programming and review. Install, test, maintain and debug assembler, and other mainframe languages. Up to date and extremely well qualified for your legacy system.
Lady Lake, Florida, United States
$75/hr · Starting at $150
I specialize in supporting and modernizing legacy software systems — especially those built on Microsoft Visual FoxPro (2.x to 9), Classic ASP, VB6, and SQL Server. Many businesses rely on these platf…
Conway, Arkansas, United States
189,647/yr · 100%
$70/hr · Starting at $1,000
Get Stripe payment and subscription billing integration from a top-rated U.S. SaaS engineer backed by $350K+ earned, 219 completed transactions, and 100% performance on Guru. I implement and improve S…
Pune, Maharashtra, India
10,711/yr · 100%
$30/hr · Starting at $50
Debugging, troubleshooting, optimizing old applications written in Microsoft Visual Basic ver. 5 or ver. 6 VB6 Legacy Expertise With over 25 years of hands-on experience in Visual Basic 6, I’ve built
Chennai, Tamil Nadu, India
ID Verified
$18/hr · Starting at $25,000
We bridge the gap between legacy business logic and modern cloud ecosystems. By combining enterprise-grade refactoring engines (Moderne / OpenRewrite) with agentic AI (Claude Code, ChatGPT Codex), we
Brasov, Brasov, Romania
$30/hr · Starting at $250
As a Senior PHP Developer and Technical Project Manager, I offer comprehensive legacy system modernization services to help businesses transform their outdated software systems into modern, efficient,…
Evatt, Australian Capital Territory, Australia
$50/hr · Starting at $100
At Hartnall Digital Solutions, we provide detailed and thorough documentation for your legacy systems. Our aim is to make the maintenance, understanding, and potential upgrading of these systems as sm…
Hacienda Heights, California, United States
$60/hr · Starting at $1,000
I enjoy application development. I worked 19 years with Singapore Airlines, developed system for 30+ AS/400s installed worldwide. I am a full time employee with a Fortune 500 pharmaceutical company in…
Bucharest, Bucuresti, Romania
$65/hr · Starting at $250
Full cycle software development. Thorough analysis, implementation & balance between speed of development, performance and production stability. C#, WPF, XAML, SQL, C++ Experience: 12yrs as full stack…
Port Said, Bur Sa'id, Egypt
$50/hr · Starting at $4,000
Many organizations still depend on legacy systems that were built years ago using outdated technologies, limited architectures, or inefficient processes. While these systems may still function, they o…
Lutherville-Timonium, Maryland, United States
$100/hr · Starting at $500
Migrate your outdated system to a new one. Create a new system that will be resistant to going out of date. Keep your old system running until you can move to a new one. I can help you keep your ol…
Hathras, Uttar Pradesh, India
$25/hr · Starting at $25
I am an experienced and results-driven OpenEdge 4GL Developer with over 8 years of hands-on expertise in developing, maintaining, and modernizing business-critical applications using Progress OpenEdge…
Porlamar, Nueva Esparta, Venezuela
$40/hr · Starting at $450
I take over existing codebases with performance, stability, or bug issues, diagnose the real root cause, and fix it without an unnecessary full rewrite. I've worked on legacy systems suffering from sl…
Bangalore, Karnataka, India
Past Earnings
$20/hr · Starting at $100
Modernize your desktop tools into enterprise-grade applications. I migrate complex Excel/VBA setups to C# .NET VSTO Add-ins or Microsoft Power Platform for improved security and scale. What I offer: V…
Lahore, Punjab, Pakistan
$24/hr · Starting at $220
Hi, I’m Logic Legacy. Are you looking to modernize your outdated software systems while maintaining reliability and efficiency? I specialize in transforming legacy applications into modern, scalable,
Delhi, Delhi, India
$5/hr · Starting at $30
Revitalize your aging systems with a comprehensive modernization strategy that bridges the gap between legacy technologies and today's cutting-edge solutions. I specialize in transforming outdated inf…
White Post, Virginia, United States
$80/hr · Starting at $320
Legacy Code Modernization | COBOL | SAS | JCL | Mainframe Expert Is your organization struggling to maintain or modernize mission-critical systems running on COBOL, JCL, or SAS? I specialize in legacy…
Tacoma, Washington, United States
$40/hr · Starting at $200
When the same data has to move on a schedule, you want a program that does it, not a person who remembers to. I build ETL pipelines in Python that run on their own or when you need them to. Source dat…
Ahmedabad, Gujarat, India
$15/hr · Starting at $800
Your IoT Vision, Delivered—From Hardware to Insights I design secure, scalable IoT ecosystems that automate operations, reduce costs, and unlock data-driven decision-making. With 10+ years in end-to-e…