Legacy System Modernization & Migration (Java / .NET / C#) by Jack KollarLegacy System Modernization & Migration (Java / .NET / C#) by Jack Kollar
Legacy System Modernization & Migration (Java / .NET / C#)Jack Kollar
Cover image for Legacy System Modernization & Migration (Java / .NET / C#)
Upgrade outdated applications to modern, maintainable architectures without disrupting business operations. I refactor, migrate, or rebuild legacy systems into scalable Java or .NET solutions with improved performance, security, and cloud readiness.
Example work
🎓 FSC Professor Ratings Scraper
🎓 FSC Professor Ratings Scraper
Budgeting Application (Java) Built a Java-based
Budgeting Application (Java) Built a Java-based
Automated Time Sheet Completer Built an
Automated Time Sheet Completer Built an
Jack's other services
Cover image for 📊 Data Dashboard & Internal Automation MVP Development
📊 Data Dashboard & Internal Automation MVP Development$75 /hr
Cover image for Subscription-Based SaaS MVP - Full Stack React/Node/Express
Subscription-Based SaaS MVP - Full Stack React/Node/Express$75 /hr
Starting at$75 /hr
Schedule a call
Tags
C#
Java
JavaScript
.NET
Backend Engineer
Dot Net Backend Developer
Fullstack Engineer
Software Developer
Software Engineer
Service provided by
Jack Kollar proNewnan, USA
1
Followers
Legacy System Modernization & Migration (Java / .NET / C#)Jack Kollar
Starting at$75 /hr
Schedule a call
Tags
C#
Java
JavaScript
.NET
Backend Engineer
Dot Net Backend Developer
Fullstack Engineer
Software Developer
Software Engineer
Cover image for Legacy System Modernization & Migration (Java / .NET / C#)
Upgrade outdated applications to modern, maintainable architectures without disrupting business operations. I refactor, migrate, or rebuild legacy systems into scalable Java or .NET solutions with improved performance, security, and cloud readiness.
Example work
🎓 FSC Professor Ratings Scraper
🎓 FSC Professor Ratings Scraper
Budgeting Application (Java) Built a Java-based
Budgeting Application (Java) Built a Java-based
Automated Time Sheet Completer Built an
Automated Time Sheet Completer Built an
Jack's other services
Cover image for 📊 Data Dashboard & Internal Automation MVP Development
📊 Data Dashboard & Internal Automation MVP Development$75 /hr
Cover image for Subscription-Based SaaS MVP - Full Stack React/Node/Express
Subscription-Based SaaS MVP - Full Stack React/Node/Express$75 /hr
$75 /hr