Looks like you have JavaScript disabled. For the full Twine experience, you will need to re-enable it.

Hi, I’m Jeff Kessler. I’m a results-driven software developer with 20+ years of experience designing and modernizing software solutions across Windows and cloud environments. I specialize in Microsoft technologies, cloud integration, and legacy system modernization to streamline business processes. I enjoy building reliable, scalable solutions that improve efficiency and digital transformation. I thrive in full-stack development, automation, and system optimization, with a focus on reliability and accuracy. I’m passionate about delivering value through technology and helping teams adapt to evolving requirements through well-architected software and thoughtful DevOps practices.…Hi, I’m Jeff Kessler. I’m a results-driven software developer with 20+ years of experience designing and modernizing software solutions across Windows and cloud environments. I specialize in Microsoft technologies, cloud integration, and legacy system modernization to streamline business processes. I enjoy building reliable, scalable solutions that improve efficiency and digital transformation. I thrive in full-stack development, automation, and system optimization, with a focus on reliability and accuracy. I’m passionate about delivering value through technology and helping teams adapt to evolving requirements through well-architected software and thoughtful DevOps practices.

Jeff Kessler

Full Stack Developer, Web Developer, Back-End Developer, +2





Hi, I’m Jeff Kessler. I’m a results-driven software developer with 20+ years of experience designing and modernizing software solutions across Windows and cloud environments. I specialize in Microsoft technologies, cloud integration, and legacy system modernization to streamline business processes. I enjoy building reliable, scalable solutions that improve efficiency and digital transformation. I thrive in full-stack development, automation, and system optimization, with a focus on reliability and accuracy. I’m passionate about delivering value through technology and helping teams adapt to evolving requirements through well-architected software and thoughtful DevOps practices.…Hi, I’m Jeff Kessler. I’m a results-driven software developer with 20+ years of experience designing and modernizing software solutions across Windows and cloud environments. I specialize in Microsoft technologies, cloud integration, and legacy system modernization to streamline business processes. I enjoy building reliable, scalable solutions that improve efficiency and digital transformation. I thrive in full-stack development, automation, and system optimization, with a focus on reliability and accuracy. I’m passionate about delivering value through technology and helping teams adapt to evolving requirements through well-architected software and thoughtful DevOps practices.

Available to hire

Hi, I’m Jeff Kessler. I’m a results-driven software developer with 20+ years of experience designing and modernizing software solutions across Windows and cloud environments. I specialize in Microsoft technologies, cloud integration, and legacy system modernization to streamline business processes. I enjoy building reliable, scalable solutions that improve efficiency and digital transformation.

I thrive in full-stack development, automation, and system optimization, with a focus on reliability and accuracy. I’m passionate about delivering value through technology and helping teams adapt to evolving requirements through well-architected software and thoughtful DevOps practices.

Skills

Experience Level

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Intermediate

Language

English

Fluent

Work Experience

Software Developer at Sensor Technology Canada

October 1, 2025 - October 1, 2025

Upgraded legacy Windows applications controlling industrial hardware to Docker-based microservices deployed to the cloud, added PostgreSQL access for data retrieval and result storage. Built full-stack web applications using .NET Core, React, and Blazor with REST APIs, designed as cloud-based solutions for onsite industrial equipment. Created a project management interface integrating QuickBooks Online (OAuth) and Titra Time Tracking for consolidated reporting to federal and provincial partners. Updated the company website with a new logo and FedDev wordmark. Leveraged Azure DevOps and Teams Sites to consolidate project assets (User Stories, development/testing/deployment plans, and OAuth renewals guides).

Senior Software Developer – Contract at The Source

March 31, 2023 - March 31, 2023

Modernized legacy POS and inventory management systems, integrating modern technologies while preserving critical business functionality. Led IoT-driven process automation with real-time inventory tracking. Reduced shipment processing time by 90% through an assumed receiving process. Integrated legacy systems with cloud technologies, improving data accessibility and business intelligence capabilities.

Senior Software Developer at Buchanan Associates

November 30, 2008 - November 30, 2008

Designed, developed, and maintained various application improvements to the Point of Sale (POS) used by Army Air Force Exchange Service (AAFES). Developed real-time monitoring applications for AAFES, controlling over-the-counter medicine distribution in combat zones.

Senior Software Design Engineer at Verifone Canada

February 28, 2007 - February 28, 2007

Developed and optimized embedded payment applications for US Moneris Solutions, integrating secure credit and debit transactions. Collaborated with cross-functional teams to enhance POS software with real-time transaction monitoring.

Client Care Representative at Millennium Process Group

January 1, 2024 - November 19, 2025

Client support role, maintaining client satisfaction.

Customer Service Agent/Supervisor at Gatestone & Co. Inc.

December 31, 2016 - December 31, 2016

Promoted to supervisor within 3 weeks, overseeing 15+ agents.