Terrence R. Crossdale

New York / New Jersey
Results-driven Full-Stack Engineer with over 10 years of experience designing and developing scalable, performant, and user-centric web applications. Proven expertise in building reusable component libraries, optimizing front-end performance, and driving development efficiencies across large-scale digital campaigns.

Technical Skills

Areas of Focus

  • Web & Application Development
  • UI/UX Development
  • Web Accessibility
  • Web Performance & Scalability

Programming Languages

  • JavaScript
  • Typescript
  • Python
  • PHP
  • .NET Core
  • SQL
  • GraphQL

Frameworks & Libraries

  • React.js
  • Next.js
  • Angular
  • Django

Tools & Platforms

  • Git
  • Docker
  • AWS

Databases

  • MySQL
  • PostgreSQL

Content Management Systems

  • WordPress
  • Sitecore
  • Contentful

Professional Experience

Bloomberg LP – New York City, NY

Senior Software Engineer – Feb 2020 - Present

  • Developed custom WordPress themes and plugins from scratch, optimizing for performance, SEO, and accessibility, resulting in a 40% increase in site traffic and improved user engagement metrics.
  • Integrated complex third-party APIs (e.g., payment gateways, CRMs, marketing platforms) into WordPress sites, streamlining business workflows and enhancing site functionality for end-users.
  • Built scalable, modular components using Advanced Custom Fields (ACF), Gutenberg blocks, and custom post types, empowering non-technical teams to manage content easily and reducing developer maintenance time by 30%.
  • Optimized site performance through code minification, lazy loading, database query tuning, and CDN integration, improving PageSpeed Insights scores from the 60s to high 90s.
  • Led full-cycle development of WordPress-based solutions for clients across industries, from requirements gathering and architecture planning to deployment and post-launch support, ensuring on-time delivery and high client satisfaction.

Equinox Holdings, Inc. – New York City, NY

Lead Front-End Engineer – Nov 2016 - Jul 2019

  • Developed a reusable website component library that improved developer workflow efficiency, reducing campaign launch timelines by 30%.
  • Standardized front-end codebase, cutting QA testing time by 25% through reusable, pre-tested modules.
  • Enabled faster production of digital campaigns, supporting 50+ launches annually with both internal and external vendors.
  • Reduced development redundancies, lowering vendor development costs by 15% while ensuring brand consistency across all web properties.
  • Increased website scalability and maintainability, allowing the marketing team to deploy new initiatives 2x faster than before.

Evoke Health – New York City, NY

Web Developer – May 2016 - Nov 2016

  • Optimized front-end performance by implementing image compression, responsive image sets, and SVGs, improving page load speeds by 40% and ensuring faster access to critical health information.
  • Streamlined code delivery through JavaScript minification, CSS modularization, reducing payload size by 35% and boosting LightHouse performance score from 72 to 94.
  • Applied lazy-loading, code-splitting, and caching strategies, cutting Time to Interactive (TTI) by 1.4s across high-traffic medical resource pages, resulting in 20% increase in engagement duration.
  • Deployed Content Delivery Network (CDN) edge caching and API response optimizations, reducing latency by 40% globally, ensuring clinicians and patients could access time-sensitive medical updates quickly.

BrightLine Partners, LLC – New York City, NY

Web Application Developer – Mar 2015 - May 2015

  • Fully coded various client web application templates in HTML5, CSS3 and Backbone.js that were integrated and used as the company standard for new and existing applications.
  • Leveraged node and gulp for task automation to enhance and streamline cross-functional team workflow which assisted in a more robust deployment process of application software to production servers.
  • Maintained a collaborative workflow with back-end developers to ensure seamless integration of front-end and back-end application functionalities.

OpenCrowd Inc. – New York City, NY

User Experience/Interface Developer – May 2014 - May 2015

  • Developed and maintained core components of internal web applications, improving data visibility and decision-making through enhanced reporting tools and interactive data visualizations.
  • Delivered intuitive and performant UI for the company’s core search platform, and built a responsive marketing site that increased user engagement and product inquiries.
  • Collaborated closely with product and design teams to develop a seamless user interface for the enterprise search tool and a responsive marketing site aligned with brand goals.

Incentient Inc. – Long Island, NY

Web Application Developer – May 2012 - May 2014

  • Developed and maintained core components of internal web applications, improving data visibility and decision-making through enhanced reporting tools and interactive data visualizations.
  • Delivered intuitive and performant UI for the company’s core search platform, and built a responsive marketing site that increased user engagement and product inquiries.
  • Collaborated closely with product and design teams to develop a seamless user interface for the enterprise search tool and a responsive marketing site aligned with brand goals.

Education Background

Stony Brook University – Long Island, NY

Bachelor of Science in Information Systems – 2009