Devon Hills
Senior Software Engineer with 7+ years building mission-critical applications serving millions of users. Expert in React/TypeScript for HealthCare.gov and government systems with proven 24/7 production reliability.
Core Expertise
HealthCare.gov Impact
Serving millions during high-traffic enrollment periods
Accessibility Excellence
WCAG/Section 508 compliance for government applications
React/TypeScript Expert
7+ years building scalable frontend systems
24/7 Production Support
Critical incident response & system reliability
Let's Connect
Proven track record building user-centric applications at scale. Ready to bring my healthcare technology expertise to your team.
About Me
Proven Software Engineer with 7+ years building mission-critical React/TypeScript applications for HealthCare.gov, serving millions of users during high-traffic enrollment periods. Expert in accessibility compliance, 24/7 production support, and government healthcare technology.
Professional Journey
Software Engineer III
Ad Hoc LLC • Nov 2021 - Present
HealthCare.gov development & optimization
Software Engineer
Raytheon Technologies • Jul 2018 - Nov 2021
Defense systems & secure applications • DoD Secret clearance
BS Computer Science
UMass Lowell • 2017
Graduated cum laude • Dean's List
Core Strengths & Specializations
Key Impact & Achievements
HealthCare.gov Impact
Redesigned health plan comparison cards using choice architecture principles based on customer feedback, improving enrollment completion rates for millions of users during high-traffic enrollment periods.
Production Reliability
Maintained 24/7 on-call rotation for critical HealthCare.gov systems, ensuring minimal downtime during peak enrollment periods while resolving frontend bugs affecting millions of users.
Accessibility Excellence
Built comprehensive accessibility testing infrastructure using axe-core, maintaining WCAG/Section 508 compliance for government healthcare applications serving vulnerable populations.
Team Leadership
Led technical documentation efforts and established coding standards that improved team velocity and reduced onboarding time, while mentoring junior developers across cross-functional teams.
Technical Expertise
Frontend Development
Backend & Full-Stack
Testing & Quality
DevOps & Tools
Professional Journey
From academic excellence to mission-critical software engineering - a progression of technical leadership, innovation, and impactful contributions across healthcare technology and defense systems.
Next
Next
Your Next Team Member?
Ready for New Challenges • Remote / Hybrid / On-site
Seeking a React/TypeScript engineer with 7+ years of experience and healthcare domain expertise? I bring proven skills in building mission-critical applications, leading technical initiatives, and driving impactful solutions.
Key Achievements
- 7+ years of full-stack development experience
- Mission-critical application expertise serving millions of users
- Government security clearance and compliance experience
- Technical leadership and mentorship background
- 24/7 production support and incident response experience
Technologies
2021 - Present
2021 - Present
Software Engineer III
Ad Hoc LLC • Remote
Nov 2021 - Present (3+ years)
Built and maintained React/TypeScript applications for HealthCare.gov health plan enrollment workflows, serving millions of users during high-traffic enrollment periods with focus on accessibility and performance.
Key Achievements
- Redesigned health plan comparison cards using choice architecture principles based on customer feedback and UX research, improving user enrollment completion rates for millions of users
- Built robust backend APIs and executed complex Ruby logic for Medicare eligibility rules and coverage transitions
- Engineered Redux-based state management for dynamic filtering and comparison features, optimizing performance under peak loads
- Developed comprehensive accessibility testing infrastructure using axe-core, maintaining WCAG/Section 508 compliance
- Built automated testing suites with Playwright and React Testing Library, including end-to-end workflow validation
- Led technical documentation efforts and established coding standards that improved team velocity and reduced onboarding time
- Participated in 24/7 on-call rotation using PagerDuty, responding to critical incidents and maintaining system reliability during peak enrollment periods serving millions of users
- Led Ruby version and critical gem upgrades ensuring stable deployments
Technologies
2018 - 2021
2018 - 2021
Software Engineer
Raytheon Technologies • Tewksbury, MA
Jul 2018 - Nov 2021 (3+ years)
Architected and maintained mission-critical software components using C++ for defense applications, conducting systematic debugging and root cause analysis for complex technical issues.
Key Achievements
- Led technical documentation initiatives and mentored junior developers, establishing coding standards
- Improved team productivity and code quality through systematic code review processes
- Collaborated in cross-functional Agile/SCRUM teams to deliver high-performance applications on schedule
- Acquired and maintained DoD Secret security clearance for classified defense projects
- Conducted systematic debugging and root cause analysis for complex embedded systems issues
- Contributed to mission-critical defense applications with strict reliability requirements
Technologies
2014 - 2017
2014 - 2017
BS, Computer Science
University of Massachusetts Lowell • Lowell, MA
Graduated December 2017
Bachelor of Science in Computer Science with cum laude honors, focusing on software engineering principles, algorithms, and computer systems architecture.
Key Achievements
- Graduated cum laude with high academic honors (GPA distinction)
- Achieved Dean's List recognition for multiple consecutive semesters
- Built strong foundation in algorithms, data structures, and software design patterns
- Completed comprehensive coursework in programming languages, database systems, and computer architecture
- Developed problem-solving skills through rigorous mathematical and computational training
Technologies
Projects
A showcase of my technical expertise and continuous learning across full-stack development, API integrations, and modern web technologies. Each project represents a deliberate expansion of my technical capabilities.
Etsy Digital Mockup Tools
An automation suite for Etsy sellers with AI content generation and full marketplace integration.
Deep dive into Python automation, API integrations, OAuth 2.0 security, and Flask web development. This project enhanced my skills in image processing, AI integration, and building production-ready tools for real business use cases.
A modern, full-stack movie and TV discovery platform with user authentication and personal watchlists.
Mastered Next.js 15 App Router, TypeScript best practices, Supabase backend integration, and SWR for data fetching. This project strengthened my full-stack development skills and modern React patterns for production applications.
Government Grant Directory
An SEO-optimized directory for small business and nonprofit grants, sourced from the Grants.gov API.
Specialized in SEO optimization, structured data implementation, and government API integration. This project expanded my knowledge in search engine optimization, JSON-LD markup, and building discoverable web applications.
Ruby Book Collection Manager
A full-stack web application for managing personal book collections with real-time Rails processing visualization.
Gained expertise in Ruby on Rails backend development, PostgreSQL database design, JWT authentication, and Rails-React integration. This project broadened my full-stack capabilities beyond JavaScript ecosystems.
More Projects Coming Soon
I'm always working on new projects and exploring cutting-edge technologies. Check out my GitHub for the latest updates!
View All ProjectsTechnologies used in my projects
Ready to Hire a Proven Engineer?
7+ years building mission-critical applications for millions of users. Available for your next role - let's build something great together.
Hire an Expert Engineer
HealthCare.gov engineer with proven track record serving millions of users. Ready to start immediately.
Connect With Me
Multiple ways to reach out - choose what works best.
What I Offer
Quick Details
Response Time: Within 24 hours
Location: Lowell, MA (Remote Ready)
Availability: Full-time & Contract
Why Choose Me for Your Team?
Proven experience with HealthCare.gov scale, accessibility compliance, and 24/7 production support. Ready to deliver results from day one.