Software Engineer

Henry Wagner

Computer Science M.S.E./B.S.E. at the University of Michigan (GPA 3.9). Full‑stack engineer with experience in TypeScript/React/Next.js and Kotlin/Spring, shipping reliable, user‑centered products. Interested in scalable systems, data, and thoughtful UX.

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Email

htwags22@gmail.com

Phone

(331) 210-3011

www.linkedin.com/in/henrytwagner

GitHub

github.com/henrytwagner

About

Computer Science M.S.E./B.S.E. at the University of Michigan (GPA 3.9). Full‑stack engineer with experience in TypeScript/React/Next.js and Kotlin/Spring, shipping reliable, user‑centered products. Interested in scalable systems, data, and thoughtful UX.

Experience

Software Engineer Intern — Customer Information Management Team
- Built dynamic Next.js + TypeScript form with conditional field logic, state-dependent validation, and SAP-integrated submission flow
- Reduced manual account intervention by 78% via backend-controlled escalation paths and automated reviewer queue logic
- Integrated external D&B and address verification APIs into Kotlin + Spring Boot services; developed custom endpoints to process, prioritize, and expose validation results for frontend consumption
- Implemented AWS SES email triggers for system events and integrated LaunchDarkly flags across API and UI layers
- Wrote unit/integration tests using Jest and Spring Test; used Datadog monitors and Slack alerts for error tracing in production
Jun 2025 — Aug 2025
Software Engineer Intern — Merchant Data and Global Menu Team
- Identified performance issues in a large-scale, customer-facing application and collaborated to determine optimal solutions
- Managed and troubleshot test environments to better align with production conditions
- Conducted rigorous code review and testing to ensure high code quality before promotion to production
- Developed a tool to enable improved code management via an intuitive UI for toggling variables
- Built RESTful API endpoints and CLI tools to make product data easier to access and modify
Jun 2024 — Aug 2024

Education

University of Michigan — Ann Arbor, MI
M.S.E. Computer Science
Coursework: Machine Learning, Computer Vision, Parallel Computing, Human Computer Interaction, Cryptography, Applied AI in XR
Apr 2026
University of Michigan — Ann Arbor, MI
B.S.E. Computer Science • GPA: 3.87 / 4.00
Honors: 6-semester Dean’s List & University Honors, James B Angel Scholar, Department of Engineering Scholarship of Honor
Coursework: Web Systems, Database and Information Systems, Cryptography, UI/UX Development, Programming & Data Structures, Data Structures & Algorithms, Machine Architecture & Assembly, CS Theory…
Apr 2025

Projects

Skills

Hint: hover on skills to see more details.

Programming Languages

C
Applied in systems-level programming and performance-oriented projects.
C++
Used for data structures, algorithms, and backend logic in technical projects.
Python
Applied in backend development and scripting at Grubhub and in personal projects.
Java
Used in backend services and testing environments at Grubhub.
JavaScript
Applied in React/Next.js frontend development for Census and other personal projects.
Kotlin
Applied in backend services and repositories at Grainger, Grubhub, and Census.
R
Used for statistical modeling and data analysis.
MATLAB
Applied in simulations, numerical analysis, and scientific computing tasks.
Mathematica
Used for symbolic math and modeling tasks.
ARM & x86 Assembly
Applied in low-level programming and architecture-focused projects.
HTML/CSS
Core technologies for web development, applied in Census and other personal projects.

Frameworks & Libraries

Spring Boot
Built and maintained REST APIs, services, and repositories at Grainger, Grubhub, and Census.
Flask
Applied in lightweight backend development for web applications.
Django
Explored for building fullstack applications with React.
React
Used extensively in Census frontend and other personal web apps.
Angular
Explored in personal learning projects alongside .NET.
Tailwind CSS
Applied in Census project for responsive theming and light/dark mode support.
Figma
Used for prototyping and UI/UX design in Census and IBD Fighter.
Illustrator
Created branding and logos, including IBD Fighter’s design identity.

Databases

PostgreSQL
Primary database for Census backend.
SQLite
Applied in lightweight prototypes and smaller web apps.
Cassandra
Worked with distributed data systems during Grubhub internship.
Mongoose
Used for ODM integration in a project management app backend.

Testing & CI/CD

JUnit / Mockito
Applied in backend testing for Java/Kotlin services at Grubhub and Grainger.
Jest
Used in frontend testing for Census and personal web projects.
Gradle / Jenkins
Supported build automation and CI/CD pipelines at Grubhub and Grainger.
LaunchDarkly
Managed and cleaned up feature flags in production systems at Grainger and Grubhub.

DevOps, Cloud & Deployment

AWS
Integrated services like SES and RDS at Grainger and Grubhub; deployment planning with ECS/ECR for Census.
Docker
Used to containerize applications and set up local/prod workflows at Grubhub, Grainger, and Census.
Kubernetes / Spinnaker
Worked with container orchestration and deployment pipelines at Grubhub and Grainger.
Swagger/OpenAPI
Documented APIs for integration in Census and internship projects.
JWT Auth
Implemented secure authentication in Census backend and applied similar patterns in internships.

Data & Machine Learning

PyTorch
Explored through personal ML experiments with model building.
AI/ML fundamentals
Explored through cryptography, computer vision, and HCI-related projects.

Development Practices

Agile / Scrum / Waterfall methodologies
Applied in team-based projects and workflows at Grubhub, Grainger, and Census.
Domain-driven design
Implemented in backend systems at Grubhub, Grainger, and Census.
Service/repository layering
Applied in backend architecture at Grubhub, Grainger, and Census.
Test-driven development
Practiced while building backend services at Grubhub, Grainger, and Census.
DTO structuring
Applied in API design for Census and internship projects.
Version control
Used extensively across all projects and internships with Git/GitHub.

Other Technical & Creative Tools

LaTeX
Prepared technical documentation and research reports.
Blender
Created 3D models, animations, and visualizations, including experiments with data visualization.
Unity (C#)
Built VR/AR prototypes with locomotion and tracking adjustments.
Unreal Engine
Explored as a creative and technical sandbox for future projects.
Apple ecosystem
Designed polished presentations and media content with Keynote and Apple Photos.

Soft/Transferable Skills

UI/UX design
Applied in Census and IBD Fighter for interface design and user experience.
Qualitative data analysis
Synthesized interview data into affinity diagrams for a career development research project.
Project management & documentation
Coordinated deliverables and documentation for internships and personal projects like Census.
Entrepreneurial product design
Created, iterated, and prototyped Census and IBD Fighter.
Cross-cultural communication
Developed through study abroad and international team collaboration.
Mentorship/collaboration
Practiced during Grubhub and Grainger internships and in team-based projects.

Campus & Community

V1 — Software Startup Club
- Engage with peers to learn about tech entrepreneurship and the software development lifecycle
- Network with industry professionals to gain insights into practical engineering methodologies
Aug 2022 — Present
Michigan Youth Sports Initiative — Volunteer/Mentor
- Organize and support youth sports events, emphasizing community involvement and leadership
Jan 2023 — Present

Contact

Email: htwags22@gmail.com

LinkedIn: linkedin.com/in/henrytwagner

GitHub: github.com/henrytwagner