Adam Peña

Senior Software Engineer

• adamjpena.com • linkedin.com/in/adamjpena

EXPERIENCE

Senior Front-End Engineer at Cash App

Remote • Oct 2022 - Feb 2025
  • Architected and launched a cross-team marketing experimentation platform, increasing conversion rates by 5% through faster A/B test deployment and real-time metric tracking.
  • Led frontend performance initiatives, cutting page load times by 70% and boosting Lighthouse scores across all surfaces by 60+ points.
  • Drove a company-wide accessibility compliance program, resolving 100% of WCAG 2.1 violations and introducing automated testing pipelines to ensure ongoing compliance.
  • Implemented advanced caching strategies and server-side rendering, improving SEO performance and increasing organic search traffic by 30%.

Senior Software Engineer at Plaid

Remote / San Francisco, CA • Aug 2019 - Sep 2022
  • Built a design system-integrated CMS used across 5+ surfaces, reducing content deployment time by 60% and enabling self-publishing by non-technical teams.
  • Directed Plaid’s apprenticeship program, overseeing mentorship, curicculum design, and operations. Achieved 100% conversion and retention rate accross 20+ apprentices.
  • Led accessibility initiatives across Plaid’s web apps, achieving full WCAG 2.1 compliance and reducing accessibility-related support tickets by 75%.
  • Developed and maintained a shared UI component library adopted across product teams, reducing UI bug incidence by 30% and streamlining new feature rollout.

Software Engineer at Visibly (formerly Opternative)

Chicago, IL • Sep 2017 - Jul 2019
  • Improved onboarding workflows and signup flows, increasing user retention by 25% and boosting first-time purchase conversion by 4%.
  • Developed rich, interactive UI components for a proprietary online vision test, contributing to a smoother and more accurate test-taking experience.

Front-End Engineer at Arrive (formerly ParkWhiz)

Chicago, IL • Mar 2016 - Sep 2017
  • Redesigned and optimized the core parking widget, increasing performance by 40% and improving booking funnel completion rates.
  • Built and shipped a new B2B platform for enterprise partners, reducing client expense report processing time by 35%.

SKILLS

JavaScript, TypeScript, React, Next.js, Node.js, Redux, GraphQL, HTML5, CSS3, Tailwind, Cypress, Jest, Docker, RESTful APIs, CI/CD, Cloud Architecture (AWS, GCP), Microservices Architecture, Serverless Computing, Web Performance Optimization, D3.js, Data Visualization

EDUCATION

University of Illinois at Urbana-Champaign

Champaign, IL • May 2014
B.S. Community Health • Dean's List