Jack Kollar's Posts | ContraPosts by Jack Kollar

Jack Kollar

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Jack Kollar

Software Engineer focused on .NET, C#, Java, Javascript

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Jack is ready for their next project!

Newnan, USA

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Newnan, USA

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Contra Pro Manage freelance projects Get verified as an expert Find jobs Get discovered Sign contracts Send invoices Commission-free payments Gumroad alternative Lemon Squeezy alternative Polar alternative

For companies

For companies Manage team projects Share hiring workspace Post jobs Discover contractors Sign contracts Approve invoices Global payments & tax compliance

Use Cases

For companies For freelancers For partners For agencies For VCs

Resources

Challenges Partnerships Advertising Creative Human Data Human Creativity Benchmark Creative Arena Project-based hiring calculator Guide to flexible hiring Guide for agencies Creator tools awards Customer stories Blog FAQs for freelancers FAQs for companies Referrals

Hire Freelancers

Explore all Top independents Design Engineering Marketing Music & audio Social media Video & animation Product Business consulting & HR Other

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pro

• 13h

🎓 FSC Professor Ratings Scraper - Python

FSC Professor Ratings Scraper — Developed an automated data extraction tool that collects professor ratings, reviews, and difficulty metrics for Farmingdale State College, enabling students to analyze instructor quality efficiently. The...

Backend Development Full Stack Development Software Development

pro

• 13h

Budgeting Application (Java)

Built a Java-based budgeting application implementing OOP principles and MVC architecture to manage expenses, categorize transactions, and generate financial summaries using structured data storage and dynamic calculations.

🛠 Tech Stack: Backend: Java...

Full Stack Development Software Development Dot Net Backend Development

pro

• 14h

Automated Time Sheet Completer

Built an automation system using Python and Selenium to auto-fill and submit timesheets across web portals. Integrated REST APIs with JSON processing for data sync and validation, and developed supporting services in Node.js for workflow...

Backend Development Full Stack Development Software Development