Jacob Giamanco
San Diego, US
jacobdeansd@gmail.com
(619) 592-2261
https://jacobgiamanco.vercel.app
jacob-giamanco
jgiamanco

Dynamic and user-centric Senior Frontend Developer with 6 years of experience in architecting and delivering robust web applications. Expert in JavaScript/TypeScript, React, Next.js, HTML, and CSS, with a proven track record of transforming complex requirements into scalable, high-performance, and accessible solutions. Adept at optimizing systems for reliability and seamless user experiences across high-traffic environments. Passionate about driving innovation, enhancing operational efficiency, and leveraging design and engineering expertise to create impactful digital products.

Experience

Software Engineer III | Technical Product Manager III
September 2021
 — 
August 2024
PayPal Inc.
  • As a member of the Content Operations, Notifications Systems, and World Ready Production Engineering teams, managed and maintained a library of 2,500+ TypeScript React templates powering transactional communications for PayPal, Venmo, Honey, and Xoom, supporting billions of customer interactions annually.
  • Executed A/B testing and experimentation for notification templates and content strategies using various software tools, validating setups and informing data-driven decisions on content effectiveness.
  • Automated operations workflows, reducing manual intervention by 80% and cutting error rates by 95%, resulting in significant time savings and improved reliability for web operations at scale.
  • Led cross-functional initiatives to optimize content storage, reducing storage requirements by 70% and translation costs by 90%, directly impacting operational budgets and delivery speed within a large-scale system environment.
Software Engineer | Web Developer | Owner
September 2019
 — 
Present
JG Creative Services
  • Redesigned and modernized 15+ client websites using WordPress and custom code, increasing average session duration by 40% and reducing bounce rates by 30% through improved UI/UX and responsive design.
  • Created a templated dashboard for non-profit marketing utilizing WordPress, Elementor, and custom code, streamlining content management and campaign oversight for clients.
  • Implemented advanced SEO and accessibility best practices, driving a 50% increase in organic traffic and achieving top-3 Google rankings for targeted keywords for multiple clients.
  • Developed and deployed an AI-powered Discord bot using Python, automating community management tasks and growing server engagement by 60%, demonstrating full-stack engineering and AI integration skills.
Web Developer
October 2020
 — 
August 2021
Petco
  • Conducted A/B testing on website designs and content using Adobe Experience Manager (AEM) during a major rebranding initiative, informing data-driven decisions for optimal user experience and conversion.
  • Revamped Petco’s e-commerce frontend, directly authoring and maintaining web pages using HTML5, CSS, and JavaScript, increasing user engagement by 25% and improving accessibility scores by 26%.
  • Troubleshot and resolved web experience issues, supported web operations peers in problem-solving, and executed quality control activities to maintain device compatibility with error rates under 1%.
Frontend Web Developer
July 2020
 — 
August 2020
Junket by iTourMobile
  • Built reusable React and Next.js components, boosting mobile user engagement by 35% within the first month through mobile-first design and performance optimizations.
  • Reduced bounce rates by over 30% by revamping core mobile app features, streamlining navigation, and enhancing user flows for critical consumer journeys.
  • Improved page load times and reduced user response times by an average of 20 seconds per request by integrating streamlined RESTful API connections and optimizing rendering strategies for scale and speed.

Education

Grossmont College
August 2009
 — 
June 2013
Associate's Degree in Fine Arts, Photography

Skills

Frontend Development:
JavaScript, TypeScript, React, Next.js, HTML5, CSS3, Redux, Zustand, TailwindCSS, Sass, Styled-components, Single Page Applications (SPA), Responsive Design, Cross-Browser Compatibility, UI/UX Design, Adobe Experience Manager (AEM), WordPress, Elementor
Software Engineering & Architecture:
Software Design/Architecture, Software Development Life Cycle (SDLC), Unit Testing, Integration Testing, Test Driven Development (TDD), CI/CD, Code Reviews, Scalable Web Architecture, Object-Oriented Programming (OOP), Problem Solving, Web Services (REST/SOAP)
Backend & Systems:
Node.js, Python, PostgreSQL, MongoDB, SQL, NoSQL, Linux, AWS, Docker, System Administration, Automation
Experimentation & Optimization:
A/B Testing, Experimentation Platforms, Content Strategy, Performance Optimization, SEO Best Practices, Web Conversions, Analytics
Collaboration & Leadership:
Technical Leadership, Mentoring Junior Engineers, Cross-functional Communication, Stakeholder Management, Agile Methodologies, Jira, Project Management
AI/ML & Concepts:
OpenAI API, Gemini API, Large Language Models (LLMs), AI Tooling, Agentic Development Concepts