Resume

Software engineer and application security practitioner with a background in building practical systems, automation, and modern web products.

Darrien Rushing

Building useful software with a security mindset.

Over 13 years in technology across enterprise software, web development, and application security. My recent work centers on secure delivery practices, automation, and shipping practical tools through RushingLabs.

Experience

Sr. Application Security Engineer

Under Armour

Sep. 2023 - Present

Focused on bringing practical security controls closer to software delivery without losing engineering velocity.

  • Delivered a custom Python CLI tool leveraging Prisma twistcli, enabling engineering teams to reduce container image vulnerabilities by 70% via automated scanning and prioritized remediation
  • Built custom Jira integrations to deliver targeted vulnerability reports to prioritized engineering teams
  • Coordinated vulnerability patching efforts from SAST and DAST tools to over 100 developers
  • Deployed an automated vulnerability management pipeline using AWS, Python, and Bash, aggregating and normalizing results across 10 AppSec tools
  • Designed and implemented a proprietary vulnerability scoring framework leveraging Snowflake and Tableau to prioritize over 100,000 findings across enterprise applications for business leadership
  • Validated findings from external researchers via Bugcrowd, ensuring quality and business impact prior to escalation
AppSecSecure SDLCDevSecOpsCI/CD

Application Security Engineer

Sectigo

Jan. 2022 — June 2023

Built internal solutions in Python while working through real operational security constraints.

  • Spearheaded AppSec initiatives by centralizing 750+ repositories into GitHub Enterprise and onboarding 12 key product lines into the core SCA platform
  • Authored and championed a comprehensive Secure SDLC policy, aligning executive stakeholders to standardize AppSec practices org-wide, across 100 developers
  • Built end-to-end custom telemetry systems using Python, PostgreSQL, Grafana, and Jira integrations to measure, visualize, and track AppSec KPIs
  • Established foundational governance and security metrics reporting, directly influencing InfoSec planning and audit readiness
PythonAutomation

Application Security Engineer

Farm Credit Bank of Texas

Mar. 2020 - Dec. 2021

Moved across several product and consulting environments, building breadth in legacy systems and modern web stacks.

  • Co-designed the organization’s first Application Security program, mapped to the OWASP Top 10, with input from security, DevOps, and engineering leaders
  • Developed an enterprise application inventory system (161+ applications) using C#, SQL, Azure DevOps, and Event Sentry, providing asset visibility and ownership tracking
  • Authored governance documentation covering Veracode scanning, API security, and vulnerability management workflows
  • Managed web application scanning and vulnerability reporting using Barracuda WAS, and coordinated remediation efforts with affiliated banks and internal teams
AppSecC#PowerShellSQL

Software Engineer

PoolCorp

Aug. 2018 - Aug. 2019

Building practical software and publishing writing on engineering, security, and useful tooling.

  • Developed RESTful APIs and backend tooling to integrate MS-SQL product data with Elasticsearch, enabling efficient search across a 150,000+ product catalog used by hundreds of internal users
  • Engineered scalable internal tools using .NET Core, React, and Redux, and prepared the platform for Docker-based deployments in Microsoft Azure
  • Initiated and led bi-weekly internal “share sessions” to demo new tools, promote knowledge sharing, and strengthen team engineering culture
  • Contributed to full-stack feature development across legacy systems, including UniBasic ERP, VB.NET/C# web services, and Vue.js front-end applications
C#.NET CoreJavaScriptReactVue.jsElasticMS-SQL

Software Developer

Immense Networks

Sept. 2017 - July 2018

  • Developed a WinForms application using C# and advanced asynchronous programming techniques to process and visualize crane arm strain sensor data
  • Maintained multiple JavaScript and C# codebases, contributing to both frontend and backend application improvements
  • Maintained and enhanced PowerShell scripts managing over 500 client workstations, ensuring access controls, script hardening, and system reliability in production environments
C#WinFormsPowerShellIT

Software Engineer

PHI, Inc. / Helipass

Nov. 2016 - Sept. 2017

  • Supported and enhanced a C# MVC web application used to automate passenger check-in workflows at domestic and offshore heliports
  • Contributed to full-stack development with C#, SQL, JavaScript, and Knockout.js, ensuring high reliability in safety-critical transport logistics
C#.NETKnockout.jsJavaScriptTypeScriptSQL

Application Developer

Performance Contractors

Oct. 2015 - Nov. 2016

  • Built a Windows service for digital invoice conversion, and provided web development support for a pipe material data coordination project
  • Managed invoice processing applications built with xCP, Documentum, and Captiva
C#Documentum

Programmer I

Louisiana Farm Bureau Insurance

Feb. 2013 - Oct. 2015

  • Built a custom SublimeText plugin with Python and JCL for COBOL development
  • Designed and built a responsive design for Farm Bureau’s public website with Bootstrap 3
  • Maintained web services in VB.NET and backend services using COBOL & JCL in z/OS environments
VB.NETCSSCOBOLJCLPython

Skills

Technical focus areas

Grouped capabilities that show up repeatedly across my security and engineering work.

Application Security

  • Secure SDLC thinking
  • Developer-friendly AppSec workflows
  • Security tooling evaluation
  • DevSecOps program design
  • Policy and maturity roadmap planning

Software Engineering

  • Next.js and React
  • TypeScript and JavaScript
  • Python automation
  • C# / .NET background
  • Frontend implementation with Tailwind

Systems and Delivery

  • CI/CD workflows
  • Technical documentation
  • Rapid prototyping
  • AI-assisted development with review discipline
  • Cross-domain problem solving

Education / Certifications

Formal education and continuing growth

A compact summary of the academic baseline and the practical learning path behind the work.

B.S. Computer Science

Southeastern Louisiana University

Before full-time software engineering