Leon Roy

Architect and build cross-platform React Native and React features for a rewards, payments, and member engagement platform; develop scalable Node.js and TypeScript backend services supporting wallet activity and real-time status updates; build admin tools; integrate third-party APIs, Stripe payments, and subscription workflows; implement push notifications and in-app messaging; lead legacy feature migrations to modern React and Node.js services while preserving data and coordinating rollout with QA, product, and stakeholders.

Partnered with growth, lifecycle, and analytics stakeholders to design and launch acquisition campaigns; translated campaign briefs into reusable landing page systems, API integrations, and automated reporting workflows. Built Python, JavaScript, and SQL tooling to generate segmented campaign audiences, trigger personalized outreach, and sync engagement data across HubSpot, Salesforce, Segment, and internal analytics layers. Developed an AI-assisted creative testing workflow with LLM prompts and brand guardrails to generate ad copy, email variants, and landing page messaging, reducing campaign setup time by 45%. Implemented event-driven automations for web forms, referral flows, lifecycle emails, and paid campaign attribution, improving data consistency across channels and dashboards. Designed BigQuery-based reporting models for CAC, conversion rates, campaign ROI, funnel velocity, and pipeline generation, enabling daily visibility into experiment outcomes and revenue contribution.

Delivered responsive web interfaces using React and TypeScript with strong attention to layout accuracy and design fidelity. Built and maintained frontend components aligned with design specifications, ensuring consistent UI behavior across devices. Implemented SEO-friendly structures including semantic HTML, metadata optimization, and performance improvements for discoverability. Worked with dynamic and user-facing content systems, ensuring clean rendering and maintainability across different content formats. Collaborated with design and product teams to iterate quickly while preserving visual and functional quality.