Joseph Markus, Senior Front-End Engineer

Joseph Markus

About

I'm Joseph Markus, a Senior Front-End Engineer with 14 years of experience designing and building user-facing applications for businesses across fintech, insurance, and media. I currently lead a team at Simply Business, where we focus on front-end architecture and user experience for the US insurance product.

My background spans high-performance React applications, design systems, and team leadership. I enjoy working closely with product and design to deliver features that are technically robust, accessible, and thoughtfully executed.

I'm especially interested in roles where front-end engineering contributes to the reliability and clarity of complex systems - whether in regulated industries or data-intensive platforms.

Experience

  1. Simply Business

    Engineering Lead (Mar 2020 - Present)
    Promoted from Mid-Level → Senior → Lead

    • Led a front-end team delivering high-impact projects (Price Comparison Engine, Brand Campaign) while driving architectural decisions and reducing tech debt
    • Oversaw the visual redesign of key products and contributed to the Mobius UI library, improving accessibility and reducing bundle size by 72%.
  2. eporta Acquired in 2021 by Shopify — Article

    Software Engineer (Dec 2018 - Mar 2020)

    • Delivered user-focused features in a React-based B2B platform and maintained the marketing site with consistent branding and UX
    • Used research insights to refine product experience and improve the platform's commercial effectiveness.
  3. GoCardless

    Software Development Engineer I (Dec 2016 - Dec 2018)

    • Improved conversion by leading A/B testing and implementing a responsive design overhaul of the marketing site
    • Integrated a CMS to streamline content updates and support faster iteration cycles.
  4. Ostmodern

    Front End Developer (Feb 2015 - Dec 2016)

    • Built front-end interfaces for high-profile projects, including BBC Player (Singapore & Malaysia) and BFI Player