# Jeff Harrison

> Software Engineer

Location: New York City Metropolitan Area, United States
Profile: https://flows.cv/jeffharrison

Enjoys diving into the world of trending NYC startups, interesting engineering problems, and the latest in frontend tools (including Ai). A committed engineer looking to make waves in the industry.

## Work Experience
### Senior Software Engineer @ Shift4
Jan 2021 – Jan 2025 | New York, New York, United States
- Served as an engineering lead responsible for transitioning and integrating VenueNext’s POS application into Shift4’s payment processing ecosystem, supporting hundreds of major venues nationwide.
- Re-architected the legacy POS application, resolving critical UI compatibility issues related to olderChromium versions, enabling seamless deployment onto new hardware.
- Managed application releases, participated in production release meetings, and communicated technical strategies and progress across cross-functional teams.

### Software Engineer @ VenueNext by Shift4
Jan 2019 – Jan 2021 | New York, New York, United States
- Built a robust Point-of-Sale (POS) application for Android merchant terminals, supporting transactions across major sports and entertainment venues.
- Implemented comprehensive features including menu systems, item categories and item modifiers, pricing adjustments, tax, fee, and discount calculations, multi-tender transactions, and advanced tab management capabilities.
- Led responsive UI development using React, Redux, and SCSS, optimizing application usability across diverse device form factors.

### Software Engineer @ Handshake
Jan 2018 – Jan 2019 | Greater New York City Area
Developed platform tools to create E-commerce solutions for some of the biggest retailers and distributors in the country.
Created Integrations used for syncing customer ERP systems data with our API using Java, javascript, HTTP, SFTP and other connection configurations.

### Engineering Coach and Counselor @ Hack Reactor
Jan 2016 – Jan 2018 | Greater New York City Area
Coached engineering Students one on one on how to be successful engineers and on what are engineering best practices. 
Worked with project teams on architecting large scale applications and how to work through challenging problems through using modern front-end tools. 
Gave Lectures on interpersonal skills, working effectively on teams, and engineering fundamentals.

### Student Instructor @ Hack Reactor
Jan 2015 – Jan 2016 | Santa Monica Ca
- Worked one on one with students in all areas of computer science and web development
- Lectured in depth on algorithms and data structures as well as best practices and approaches
- Conducted technical interviews and assessed technical proficiency from administering live challenges
- Reviewed project code, work-shopped solutions with various teams, and delivered feedback daily to students


## Education
### Software Engineering
Hack Reactor
Jan 2015 – Jan 2015


## Contact & Social
- LinkedIn: https://linkedin.com/in/jeffwharrison86

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Source: https://flows.cv/jeffharrison
JSON Resume: https://flows.cv/jeffharrison/resume.json
Last updated: 2026-03-22