William Lubelski

Senior Frontend Engineer · Remote / SF Bay Area

• Product engineer for Reimbursements.
• Rebuilt a legacy form library with TypeScript and React hooks, using advanced types to preserve backwards compatibility.

Staff Frontend Engineer · Remote / SF Bay Area

• Led a team to improve Shift Management search performance, reducing page load times for larger customers from multiple minutes to 500 ms.
• Led the navigation and branding overhaul for the Payroll product.
• Built frontend infrastructure for localization, wizard workflows, type-safe reactive localStorage, and client-side navigation alongside legacy server-rendered pages.

Senior Developer II, Frontend · Remote / SF Bay Area

• Re-architected data fetching and the frontend of TotalComp.
• Designed and built the frontend for the HRIS integration system.
• Supported a junior engineer leading the Total Rewards frontend project; advocated for and adopted Carta’s micro-frontend system.

Senior Frontend Developer · Remote / SF Bay Area

• Built the customer-facing payments and account management portal.
• Designed a system to embed the customer portal in the admin portal for smoother support interactions.

Senior Frontend Developer · San Francisco, CA

• Led the transition from a white-label CMS prototype to an in-house web application, prioritizing simple, maintainable architecture.
• Mentored junior engineers through pair programming and cross-team collaboration.

Frontend Developer · Boston, MA

• Built features for data-rich CRM and nonprofit fundraising applications using React and Backbone.
• Designed and built a Flux-based state management library, then helped transition the application to modern React practices.
• Mentored junior frontend developers.