Senior Software Designer and Developer
Jan 2026 - Present · 5 mos
self employed · Self-employed
York, PA
Remote
Designed, created, and deployed https://demo.zearfoss.com, a multi-user website for managing careers and job searches.
- • Created an administrative area with built-in permissions and advanced search features.
- • Made site fully customizable to allow users to control what information is publicly displayed.
- • Optimized database queries to reduce load times and improve site performance.
- • The code repository is at https://github.com/craigzearfoss/portfolio .
Skills:
PHP · Laravel 12 · MySQL · JavaScript ES6 · CSS3 · Ubuntu · Nginx · Amazon Web Services (AWS) · Amazon EC2 · Bulma CSS framework · HTML5 · Git
Senior Software Developer
May 2021 - Dec 2025 · 4 yrs 7 mos
Idaho National Laboratory · Full-time
Idaho Falls, ID
Remote
Modernized and added new features to a ticketing system for monitoring cyber threats.
- • Upgraded and enhanced legacy system to use modern CodeIgniter 4 and Vue.js frameworks.
- • Led the implementation of an RBAC system, enhancing security protocols and user management.
- • Designed and created a custom ticket authoring interface using Vue.js.
- • Upgraded site to PHP 8.4 and MySQL 8.2.
Skills:
PHP · CodeIgniter 4 · MySQL · MariaDB · Vue.js · JavaScript ES6 · jQuery · CSS3 · Git
Senior Software Engineer
Jul 2019 - May 2021 · 1 yr 10 mos
3M · Full-time
Maplewood, MN
On-site
Used a rules-based engine to validate 3M product data in an Elasticsearch database.
- • Created custom Elasticsearch queries to gather retailer listing data for 3M products to ensure accuracy.
Skills:
PHP · Vue.js · MySQL · Elasticsearch · JavaScript ES6 · CSS3 · Git
Senior Software Engineer
Sep 2016 - Jul 2019 · 2 yrs 10 mos
Questar Assessment Inc. · Full-time
Apple Valley, MN
On-site
Modernized and added new features to an authoring and delivery system for state-wide student assessments.
- • Automated PDF booklet creation from online state-wide interactive student exams.
- • Implemented a custom queuing system to control the PDF booklet system process.
- • Created a booklet previewer to allow graphic designers to make modifications to individual test items.
- • Developed interactive test items to enhance user engagement and improve assessment accuracy.
Skills:
PHP · Laravel · PostgreSQL · JavaScript ES6 · jQuery · XML · HTML5 · Git · JIRA
Senior Web Developer
Feb 2009 - Sep 2016 · 7 yrs 7 mos
Junta LLC · Full-time
Miami Beach, FL
On-site
Created and maintained high-traffic multimedia member websites and public tours.
- • Performed SEO optimization, A/B testing, traffic analysis, and billing audits.
- • Enhanced content management efficiency by developing robust administrative applications.
Skills:
PHP · JavaScript ES6 · jQuery · Ubuntu · Apache2 · Nginx · CSS · Git · JIRA
PHP Web Developer
Nov 2006 - Jan 2009 · 2 yrs 2 mos
Presens Technologies Ltd. · Full-time
Winston-Salem, NC
On-site
Designed and implemented web-based leadership assessments for multiple clients.
- • Created online assessments and performed complex statistical analysis of result data.
- • Generated PDF reports with graphic data analysis for individual participants.
Skills:
PHP · MySQL · JavaScript · jQuery · Apache2 · PDFLib
PHP Developer
Apr 2006 - Nov 2006 · 7 mos
Offut Systems · Full-time
Greensboro, NC
On-site
Converted a Linux-based real estate application to Windows for remote use by real estate agents.
Skills:
PHP · MySQL · Oracle · JavaScript · Windows · Linux · CSS · SQL
Software Programmer/Analyst
Sep 1992 - Mar 2006 · 13 yrs 6 mos
IBM Desktop Systems / Lenovo · Full-time
Durham, NC
On-site
Created an automated build process for Windows OEM pre-installation software for all Lenovo PCs.
- • Designed and created an in-house website for managing software applications.
- • Performed software testing, hardware upgrades, and pc maintenance.
Skills:
Rexx · Visual Basic · DOS · OS/2 · Windows · Windows NT · JavaScript · Lotus Note