Resume of Caleb Hemphill

SUMMARY

Senior Software Engineer with 7+ years building and modernizing scalable web systems. Strong full‑stack experience (React, TypeScript, Node.js) and proven impact on reliability, performance, and delivery: reduced deployment time by 80%, supported systems serving up to 100+ TB/month, and led cross‑functional teams to production.

TECHNICAL SKILLS

  • Languages: JavaScript (ES6+), TypeScript, Python, PHP, SQL
  • Frontend: React, Cesium, HTML5, SASS, Webpack, Leaflet, ExtJS, Bootstrap
  • Backend: Node.js, Symfony, Drupal 8/9/10, CKAN, REST APIs
  • Databases: PostgreSQL, MySQL, Redis
  • DevOps/Infra: Docker, GitLab CI, Nginx, CI/CD pipelines
  • Tools: Git, Lighthouse, Twig

EXPERIENCE

Software Engineer

USGS EROS (Contractor through United Support Services Inc) · November 2017 – Present

  • Modernized legacy CKAN (Python) and core platform components, improving stability, security, and maintainability.
  • Used GitLab pipelines to cut deployment time ~80% and reduce release failures.
  • Built TypeScript front-end that is used by 7+ projects, reducing redundant integration effort ~75%.
  • Designed and implemented Cesium-based 3D geospatial search visualizations and high‑performance React interfaces to improve data discovery and user workflows.
  • Developed custom Drupal modules and themes (Twig, JS, SASS) for imports, profile-driven field population, and workflow preservation. Eliminated manual steps and saved hours per entry.
  • Mentored developers, assigned work across a 5‑person team, and owned major product areas.

Website Developer

First Presbyterian Church of Burlington, IA · May 2017 – October 2017
  • Built and maintained PHP-based website (design, content workflows, automation) using PHP

Owner & Operator

Caleb’s Honey Farm · April 2008 – October 2017
  • Managed website and operations for ~60 hives; sold thousands of bottles/year.

EDUCATION

Dakota State University

Computer Science & Cyber Operations Madison, SD · August 2013 – May 2017