Andy Coles

Resume

Andy Coles

Product Engineer — Frontend / AI-Leveraged Systems

San Francisco Bay Area, CA

Product-focused engineer with 10+ years building high-performance web applications and complex user workflows. Specialized in frontend systems for data-heavy and asynchronous products, with growing focus on AI-augmented development.

Proven track record delivering scalable dashboards, performance improvements, and developer tooling in small, fast-moving teams. Strong partner to product and design, translating ambiguous requirements into intuitive, production-ready interfaces.

Key Production Practices

  • AI-native DX — Knowledge and best practices in prompt engineering and AI-driven workflows. Leveraging tools to increase productivity by orders of magnitude.
  • Responsive Web — Viewport-tailored UX development strategy.
  • Design System — Governance, collaboration, and process around design tokens, reusable component compositions and branding guidelines.
  • Accessibility (A11y) — Knowledge and best practices in WCAG and semantic UI.
  • BDD Validation — Behavior Driven Development. Unit, integration, and e2e testing workflow and regression.

Tech Stack

Frontend
— React, Vue, TypeScript, Next.js, Vite, Tailwind, React Query, GraphQL
Backend / Infra
— Node.js, Ruby on Rails, Postgres, Prisma
Tooling
— Claude Code, Cursor, Jest, Vitest, Cypress, Sentry, AWS, Cloudflare

Experience

  1. Feb2025 - Apr2026

    Mudflap

    Senior Software Engineer

    • Led frontend development for a core operations dashboard used by fleet businesses, owning architecture and delivery across high-impact features
    • Improved data-heavy UI performance and scalability by standardizing backend-driven pagination and optimizing rendering patterns
    • Reduced LCP to target thresholds through code-splitting, lazy loading, and dependency optimization
    • Built foundational design system components (tables, filters, selects) enabling faster iteration across product surfaces
    • Established type-safe API integrations via OpenAPI → TypeScript generation, reducing integration errors
    • Introduced end-to-end testing (Cypress + CI), increasing release confidence and reducing regressions
    • Partnered closely with product/design to iterate on complex workflows and data interactions
    • Drove a mobile optimization initiative across ~70 views of the card application funnel, using Amplitude data to define design targets and an A/B test to confirm an 8% lift in conversion

  2. Oct2023 - Jan2025

    Meter

    Front End Engineer

    • Led frontend architecture during a major cloud/network platform overhaul, shaping UI for complex configuration workflows
    • Optimized rendering of large graphs and datasets, reducing INP to <200ms
    • Implemented code-splitting strategy improving Lighthouse scores (~+15) and cutting CI runtime by ~50%
    • Contributed to shared design system, improving consistency and accessibility across products
    • Established end-to-end testing and CI workflows, increasing reliability of releases

  3. May2021 - Jun2023

    ON24

    Lead Front End Engineer

    • Led team of 6 in rebuilding a legacy platform into a modern React SPA serving enterprise webcast products
    • Delivered a multi-year migration strategy enabling parallel feature development without disrupting existing users
    • Reduced build times ~50% by migrating to Vite, improving developer iteration speed
    • Established testing strategy and CI reliability for large-scale frontend system
    • Built and scaled a shared design system adopted across multiple teams

  4. May2020 - May2021

    Glassdoor

    Senior Front End Engineer

    • Built core UI components and data visualization systems for Review Intelligence product suite
    • Influenced frontend architecture and mentored engineers across the org
    • Designed scalable filtering and reporting interfaces for enterprise users

  5. Feb2016 - May2020

    Glassdoor

    Front End Engineer

    • Delivered key features for job campaign and ad products used by partners and internal teams
    • Improved ad performance (TTI + UX), contributing to 8x increase in CTR and $600K+ quarterly revenue
    • Migrated legacy jQuery apps to React, improving maintainability and scalability
    • Reduced build times and resolved performance bottlenecks across frontend systems

  6. Jan2012 - Jan2016

    Earlier Experience

    UI/UX Lead & Web Designer

    UI/UX Lead, Fusi Inc — Led design and frontend architecture; delivered rapid prototypes for data visualization tools.

    Web Designer, Tightrope Interactive — Built marketing sites, improved conversion via A/B testing, promoted quickly.

Education

California State University, Chico