William Sierra Jr.
Full Stack Developer and educator focused on building fast, accessible products. Worked in the education space tutoring/teaching students with companies including QuickStart, Color Coded Labs and Codecademy. Currently providing development and educational services as a freelancer while searching for my next opportunity.
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// featured work
Led front-end development for TasteBud, a personalized food discovery platform, building the complete user-facing product, administrative panels, and internal tooling for team operations. Developed responsive product workflows and operational interfaces supporting both customer engagement and internal platform management.
Contributed to the mobile front-end and conversion funnel workflows for 5 Voices, a personality and leadership platform serving individuals and enterprise teams. Built and optimized responsive user flows spanning assessment onboarding, personalized content experiences, and subscription funnels, improving mobile UX, engagement, and product conversion.
Contributed to front-end development for GiANT Worldwide’s leadership platform, building workflows across assessments, onboarding, and administrative panels. Developed responsive user-facing experiences and internal tooling that supported product activation, platform operations, and digital coaching workflows.
Led full-stack development for FourtyFive.io, a sales enablement SaaS platform, building front-end product workflows, analytics dashboards for admin users, and architecting core backend systems. Developed data-driven interfaces and platform foundations supporting guided selling, reporting, and operational workflows.