# Eric Janssen > Senior Software Engineer/Technical Lead/Manager at BillGO Location: Eden Prairie, Minnesota, United States Profile: https://flows.cv/ericjanssen Driven Software Engineer that enjoys delving into technical problems which deem tricky and troublesome. Powered by improving software, creating software and seeing the impact that software can bring to the world. Always looking for the next interesting challenge. ## Work Experience ### Senior Software Engineer/Technical Lead/Manager @ BillGO Jan 2022 – Present Transitioned to Technical Lead and Manager. Lead and mentor a team of software engineers spanning from Software Engineers I's to Staff Engineers in reverse engineering, building internal tooling, and data connections in C# .NET, TypeScript, and Node.js. Communicate and coordinate with stakeholders across the organization for product direction and technical vision in an Agile environment. Continue to contribute as an individual contributor alongside providing technical expertise and support. ### Senior Software Engineer @ BillGO Jan 2021 – Jan 2022 Utilize C# and TypeScript to provide solutions to complex problems in the financial payment space. Reverse engineer various security libraries via static and dynamic analysis spanning from web applications to mobile binaries with Ghidra, Frida, Wireshark, HTTPToolkit, APKTool, various Java decompilers. ### Vice President @ Minnesota Autosports Club Jan 2020 – Jan 2022 501(c) Nonprofit organization. Further performance driving and provide an opportunity for others to experience motorsports events with a low barrier to entry. Additional responsibilities beyond aiding in all club related activities include maintaining website and services. ### Senior Software Engineer @ Beckman Coulter Diagnostics Jan 2020 – Jan 2021 Maintained, supported, and added features to immunoassay analyzers (DxI 800, DxI 600, Access2) in C/C++ in regulatory medical device environment. Updated software suites to allow operating on new hardware with Windows 10. Debugged field issues while working with remote teams in multiple time zones. ### Independent Software Consultant @ Loffler Companies Jan 2020 – Jan 2020 Contract project that was done in my nights and weekends. Customer was deploying infrared temperature and facial recognition scanners at sites as access control and required custom functionality. Minimal documented API required reverse engineering a custom built Android device and its associated APKs to tap into features and undocumented APIs. Developed local http server to re-route requests to add additional features to the base application as needed. Created offline license key system for enabling feature sets. ### Software Application Engineer @ Life Time Inc. Jan 2019 – Jan 2020 Utilized Xamarin and .NET with C# to develop cross platform applications for iOS and Android spanning from membership services to streaming and casting video to external devices. ### Software Engineer II @ Trimble Transportation Jan 2017 – Jan 2019 | Greater Minneapolis-St. Paul Area Sought out many additional responsibilities such as mentoring new associates and team members, conducting technical interviews and becoming a subject matter expert in areas of the system where the knowledge was lacking. Ensured that technical debt and software faults were minimized during code reviews, where applicable. Designed and implemented various new features while also maintaining software quality by tackling difficult bugs which involved flying onsite to customers to provide technical analysis to successfully resolve high impact issues. Focused on Android with the interaction with different OEMs and maintaining a relationship with an oversea OEM which produces specialized Android hardware that the team interfaces with. ### Software Engineer I @ Trimble Transportation Jan 2017 – Jan 2017 | Greater Minneapolis-St. Paul Area Write cross platform software for Peoplenet Fleet Management mobile application on android using C# utilizing Xamarin. Application spans from collecting core vehicle data logging, to allowing drivers to use and keep track of electronic driver logs. Also support other platforms such as WinCE and Win for mobile devices. Perform work on an AGILE team using SCRUM methodology. ### Software Developer @ Daktronics Jan 2015 – Jan 2016 Department: Sports Software Data Team - Moved to this team in early 2016. Work primarily on sports software which is used to track in game plays and statistics for Football, Softball, Basketball, Volleyball, Lacrosse, and Baseball. Primarily doing development with MFC C++, C# winforms and WPF, and a good amount of SQL for all of the statistics tracking. Department: Video production Engineering - Write system automated testing which is continuously integrated. Maintain and update old tests. Update testing framework to handle new features. All done with .NET test framework with coded UI tests in C#. ### Route Assistant @ Appert's Foodservice Jan 2014 – Jan 2014 Navigated a semi truck and trailer around MN, SD, IA, WI and ND. Delivered food and food related products via hand cart from trailer to customers. ### Paint and Tools Clerk @ Mills Fleet Farm Jan 2013 – Jan 2013 | Wait Park, Mn Mixed and created custom paint. Stocked shelves and aided customers in finding the correct tools for their needs. ### Shop Hand @ Rustic Log and Willow Jan 2010 – Jan 2012 | St.Joseph, Mn Stripped and prepared logs before being built by hand into custom log furniture. Restored and repaired previous customers furniture that was damaged due to weather. ## Education ### Bachelor's in Science in Computer Science South Dakota State University Jan 2013 – Jan 2016 ## Contact & Social - LinkedIn: https://linkedin.com/in/engineer-eric --- Source: https://flows.cv/ericjanssen JSON Resume: https://flows.cv/ericjanssen/resume.json Last updated: 2026-03-22