2022 — Present
Full Stack Developer
Cryptic Vector Defense- Full-stack engineering on work covered by NDA. Details available upon request.
Gregory
Hill
Full-Stack Engineer Builder of small things and large platforms
I've spent two decades shipping software across
education, gaming, defense, healthcare, and entrepreneurship.
I'm a published Xbox indie dev, a co-author of peer-reviewed clinical research,
and a founder.
Scroll for the timeline ↓
Resume / Portfolio · 2026
01 / Timeline
Twenty years, five domains, many ships
A career that hopscotched across industries. Each bar is a role; each numbered marker is a notable ship — click through to its card below.
2006
2010
2014
2018
2022
2026
Healthcare
Education
Defense
Startup
Healthcare
Education
Defense
Startup
Projects shipped
-
2022 — PresentCryptic VectorDefense
-
2015 — 2022Cincinnati Children's HospitalHealthcare
-
2017 — 2020Delta TechItStartup
-
2011 — 2015CollegeSourceEducation
-
2010 — 2011Northrop Grumman — XetronDefense
-
2009 — 2010redLanternEducation
-
2006 — 2009Johnson & Johnson — EthiconHealthcare
Selected ships, in order
- 2009Power Hour & Super Xblox 360 — Xbox 360 indies (delisted 2017 when Microsoft ended XBLIG)
- 2011 →American Legacy Tours — homepage & ticketing (ongoing)
- 2014Transferology launches — scaled to 2M+ annual users (my contributions through 2015; site still running)
- 2015GreenTracks — medical-trainee tracker (my contributions through 2022; site still running)
- 2016MS Band — Halo 5 & Destiny stats on your wrist
- 2018PARS published in JACI (PubMed 30554722)
- 2018 — 24OTR Chamber of Commerce
- 2018 — 24Visit OTR — interactive map of Over-the-Rhine
- 2020 →GoKart fundraiser for Cincinnati Children's (ongoing)
- 2021OHCovidVaccines.com (+ KYCovidVaccines)
As featured in
- CNN
- The New York Times
- JACI
- Halo Waypoint
- Windows Central
- Local 12 News
- Inspire Magazine
02 / Experience
Where I've worked
Seven companies, four industries — from medical-device billing systems to clinical research apps to a one-person drug-testing startup.
2015 — 2022
Senior Application Developer
Cincinnati Children's Hospital Medical Center Healthcare- Built multiple serverless applications for the Rare Disease Network using AWS Lambda, React, TypeScript, and Chalice; implemented SQS FIFO queues for reliable event-driven data processing.
- Architected a cross-platform identity synchronization system granting thousands of researchers role-based access across 15+ tools and platforms.
- Co-authored peer-reviewed research on the Pediatric Asthma Risk Score (PARS), published in the Journal of Allergy and Clinical Immunology — PubMed 30554722.
- Delivered the PARS clinical decision suite — a responsive web app, Android app, and iOS app — translating published research into a widely distributed clinical tool.
- Served as sole technical architect and developer of GreenTracks, a longitudinal medical-training tracker used by CCHMC's Office of Pediatric Clinical Fellowships and UC's Medical Scientist Training Program.
- Expanded GreenTracks from a simple record digitization tool into a career-spanning platform that follows medical professionals from residency through professional practice.
- Integrated GreenTracks with MedHub, PubMed, BugSnag, and Jira via REST APIs to automate data synchronization and streamline workflow management.
2017 — 2020
Founder & CTO
Delta TechIt LLC Startup- Founded and built TheDrugScreen.com, a pay-as-you-go pre-employment drug testing platform with real-time results and automated candidate notifications.
- Owned all technical decisions — stack selection, third-party integrations, DevOps, and infrastructure — from initial Azure deployment through AWS migration.
- Integrated with laboratory and compliance partners via RESTful JSON APIs and SOAP web services to automate end-to-end testing workflows.
- Drove weekly partner meetings covering development milestones, cross-functional action items, and technical problem resolution.
2011 — 2015
Lead Software Developer
CollegeSource, Inc. Education- Led greenfield redevelopment of Transferology.com and TransferologyLab.com, shipping both responsive platforms in 2014 with a single codebase across all devices.
- Platform scaled to 2M+ annual users post-launch, serving students and institutions across the country.
- Implemented WCAG 2.0 accessibility standards using WAI-ARIA and JavaScript, expanding platform reach to users with disabilities.
- Recovered three at-risk product initiatives as lead developer, steering each to successful release.
- Defined and drove the product roadmap for new features and enhancements, contributing to a 20% revenue increase.
- Maintained a global course applicability network spanning hundreds of universities, enabling students to evaluate credit transferability before committing to a school.
2010 — 2011
Application Software Engineer
Northrop Grumman — Xetron Defense- Cut pre-production testing cycle time by 75% by engineering an automated test tools suite.
- Authored comprehensive technical documentation including test cases, test plans, and standard operating procedures.
- Managed and triaged a prioritized defect backlog, driving root-cause analysis across multiple hardware configurations.
- Executed continuous regression testing across hardware combinations to validate system compatibility.
- Led team through Factory Acceptance Testing on an accelerated schedule, meeting the customer delivery commitment.
2009 — 2010
Software Developer
redLantern LLC Education- Designed and implemented full-stack UI and server-side logic for the u.direct student graduation tracking system.
- Built and maintained automated test tooling and regression test suites to ensure release quality.
- Delivered server-side features using Java, Hibernate ORM, and Spring MVC.
2006 — 2009
Software Engineer
Johnson & Johnson — Ethicon Endo-Surgery Healthcare- Delivered a code conversion project for a legacy job scheduling application, eliminating over $1M in annual licensing costs.
- Automated workflows across multiple departments by developing macros and scripts spanning time tracking, reporting, and CAD systems.
- Produced full-lifecycle project documentation: requirements specs, test cases, project plans, and user manuals.
- Coordinated cross-functional teams across headquarters and manufacturing sites to deliver shared engineering initiatives.
- Administered development servers and built internal collaboration and testing tools used across engineering teams.
- Designed and developed the customer billing system for the Sedasys® System.
03 / Selected work
Things I've shipped
From published clinical research to a regional vaccine finder, all the way back to Xbox 360 indie games published before the App Store existed.
Pediatric Asthma Risk Score
A continuous scoring system for assessing the risk of asthma in young children — delivered as a responsive web app, Android app, and iOS app. Translated peer-reviewed research into a clinical tool now in active use. Independently validated in 2023 across 5,634 children in 10 diverse cohorts (NEJM Evidence, PMID 38320177).
Co-authored in JACI
PubMed 30554722
HTML5
PhoneGap
iOS
Android
Responsive Web
OHCovidVaccines.com
Helped Ohioans (and later Kentuckians) find available vaccines during the rollout when supply was scarce. Sunset in 2022.
Local 12 News
Halo 5 & Destiny stats on Microsoft Band
A tile generator that pulled live player statistics from Halo 5 and Destiny and pushed them onto the Microsoft Band 2 smartwatch. Built for the official Halo API Hackathon.
Halo Waypoint
Windows Central
OnMSFT.com
Halo API
Bungie API
C# / .NET
MS Band SDK
Transferology
National course-credit transfer marketplace — now covering 400+ colleges and supporting AP, CLEP, IB exams, and military credit. Single responsive codebase, WCAG 2.0 accessibility. My contributions ended in 2015 when I left CollegeSource; the site is still running.
Java
Spring MVC
Hibernate
WCAG 2.0
GreenTracks
Longitudinal medical-trainee tracker generating NIH T32 Training Tables to support grant funding. REST integrations with MedHub, PubMed, BugSnag, and Jira. My contributions ended in 2022 when I left CCHMC; the site is still running.
REST APIs
MedHub
PubMed
TheDrugScreen.com
Real-time pay-as-you-go pre-employment drug testing platform. Lab + compliance integrations. Migrated Azure → AWS as business grew.
Azure → AWS
REST
SOAP
Visit OTR
Interactive map and discovery experience for Cincinnati's historic Over-the-Rhine neighborhood.
OTR Chamber of Commerce
Digital home for the Over-the-Rhine Chamber — advocate for the neighborhood's economic vitality and cultural diversity.
American Legacy Tours
Homepage for one of Cincinnati and Northern Kentucky's longest-running historical-tour operators — now offering 17+ tours. Their Queen City Underground Tour was rated one of the top 5 underground tours in the US by USA Today.
USA Today · Top 5 Underground Tours
Power Hour
Xbox 360 indie title shipped through Xbox LIVE Indie Games. Combined with Super Xblox 360, the two crossed 85k+ worldwide downloads. Delisted in 2017 when Microsoft ended Xbox 360 indie game support.
XNA
C#
Xbox 360
Super Xblox 360
Xbox 360 indie title shipped through Xbox LIVE Indie Games. Delisted in 2017 alongside Power Hour.
XNA
C#
Xbox 360
04 / Skills
Programming languages, tools, and technologies
Languages
- TypeScript / JavaScript
- Java
- Python
- C# & C++
- HTML5, CSS3, SASS, Less
- SQL
Frameworks & UI
- React
- Spring MVC & Hibernate
- Thymeleaf / Freemarker / JSP
- Bootstrap & FontAwesome
- Jest, Selenium, Puppeteer
- jQuery, AJAX
Cloud & Infra
- AWS Lambda · DynamoDB · S3
- AWS SQS · SNS · CloudFormation
- Azure Functions · App Services
- Azure Blob Storage · App Registrations
- OAuth
- Linux · Windows
Tooling & Practice
- Git, GitLab, Maven
- Jira, Confluence, Bamboo
- WCAG 2.0 / WAI-ARIA
- REST, SOAP, AJAX
- TCP/IP · Wireshark
- Visual Studio · TestTrack · AutoIt
05 / Credentials
Education & awards
Education
2016
University of Cincinnati
Master's Certificate
Biomedical Informatics — College of Medicine (partially completed)
2004 — 09
University of Cincinnati
Bachelor of Science
Computer Science — College of Engineering
Awards & honors
2009
1st place — Best of Computer Science
UC College of Engineering Senior Capstone Award
2009
3rd place — IEEE Tech Expo
Cincinnati Engineering Tech Expo, Senior Capstone Projects
2006
Encore Award
J&J Ethicon Endo-Surgery — "Keeping the Credo Alive"
2018
Co-author
Pediatric Asthma Risk Score in JACI — PubMed 30554722
06 / Beyond the resume
Outside of work
GoKarts for Cincinnati Children's
An annual fundraising effort in honor of our son Victor — combining go-karting, storytelling, and a livestreamed appeal that raises funds for CCHMC, the hospital that cares for thousands of kids like him.
★ Inspire Magazine
I'm a husband and father of three amazing kids. I run, play soccer, and watch FC Cincinnati. I'm a fan of all things Marvel and Star Wars — and I spend a fair amount of my free time poking at whatever's new in the web development world.
Once upon a time
I was CNN's "interesting person of the day" for a Groupon marriage proposal that the New York Times ended up writing about. She said yes.