# Victor D Castillo Harrington > Full Stack Software Engineer Location: San Jose, California, United States Profile: https://flows.cv/victordcastilloharrington Full stack engineer specialized in the TypeScript/JavaScript Ecosystem. Skilled in both front-end and back-end technologies. A collaborative professional and out-of-the-box thinker. ## Work Experience ### Senior Software Engineer @ Ours Privacy Jan 2026 – Present | Los Angeles, California, United States ### Senior Software Engineer @ Athenaworks Jan 2024 – Jan 2026 Contractor on a B2B SaaS healthcare AI startup for dental X-Ray processing and dental practice management. • Reduced operational overhead by 35% by engineering a streamlined self-service intake platform with pre-configured access points, eliminating manual customer outreach bottlenecks and accelerating time-to-value. • Accelerated customer onboarding by 60% by architecting a bulk creation system with template-based provisioning, processing 500+ accounts simultaneously through automated async workflows. • Increased sales productivity by 25% via bidirectional HubSpot CRM integration, synchronizing customer data and revenue systems in real-time, ensuring seamless transitions between sales, customer success and management tools. • Drove 10% sales pipeline growth by engineering comprehensive data visualization dashboard with search and compare capabilities, exposing critical bottlenecks and optimizing conversion funnels. • Eliminated manual address verification by implementing an intelligent address validation API with fuzzy matching and deduplication algorithms, reducing data entry errors by 95%. • Enhanced system performance and UX by refactoring internal APIs to enable composite filtering and full-text search using PostgreSQL indexes and optimized query planning. • Collaborated closely with product and business stakeholders to translate operational needs into scalable technical solutions. • Technologies: AWS, TypeScript, React.js, Koa.js, PostgreSQL, Apache Kafka, Auth0 API, Hubspot CRM API, Stripe API, Radar API ### Senior Software Engineer @ Ours Therapy Jan 2023 – Jan 2024 Engineering co-lead at Ours, a web platform for premium therapy experiences for couples with a presence in all 50 states and an emphasis on human connection and enhanced therapy session value. • Built secure, HIPPA compliant telehealth platform from the ground up, serving 5,000+ virtual therapy sessions monthly with 99.9% uptime, directly contributing to a 15% increase in patient retention. • Eliminated manual matching process by engineering a weighted recommendation engine with dynamic intake forms, improving the provider-patient pairing success rate to 92%. • Boosted session bookings by 30% by developing a multimedia activities dashboard integrated with the video platform, featuring progress tracking and interactive tools to increase client engagement. • Increased provider bookings by 23% by launching a bespoke practice management suite complete with scheduling, billing, session notes, and analytics for hundreds of providers. • Fortified security posture by implementing enterprise-grade RBAC, MFA and audit logging and monitoring systems across all microservices to ensure full HIPPA compliance. • Accelerated development velocity by 35% hrough the creation of a custom React component library with Storybook documentation, standardizing UX across web and mobile platforms. • Worked cross-functionally with clinicians, designers, and product managers in a regulated environment. • Technologies: AWS, Auth0, React.js, Express.js, React Native, TypeScript, PostgreSQL, Apache Kafka. ### Full Stack Engineer @ The Knot Worldwide Jan 2021 – Jan 2023 Worked for The Knot, a fortune 500 ranked company that provides wedding planning services and products. • Reduced page load times by 30% by decomposing a legacy monolithic architecture into event-driven microservices, handling 2M+ monthly users across the platform. • Increased product discovery conversion by 18% through a lightning-fast Algolia search implementation featuring faceted filtering, autocomplete, and typo tolerance. • Generated 25% revenue uplift and reduced churn by optimizing the e-commerce storefront with improved product pages, streamlined checkout, and personalized recommendations. • Cut order fulfillment time by 20% via automated printing workflow integration with third-party printer APIs, eliminating manual processing for 10,000+ monthly orders. • Enabled data-driven product decisions by establishing A/B testing infrastructure using feature flags and analytics pipelines. • Mentored junior engineers by assigning scoped tasks and keeping an open-door policy, ensuring quick ramp up to production features. • Technologies: AWS, TypeScript, Next.js, Nest.js, PostgreSQL, MongoDB, Algolia, Docker, Kubernetes. ### Frontend Developer @ Grupo el Comercio - Perú Jan 2021 – Jan 2021 Front End developer for Grupo El Comercio, the largest media conglomerate in Peru. • Enhanced site performance by 30% by migrating high-traffic news platform (5M+ monthly visitors) to headless CMS architecture with lazy loading and aggressive caching strategies. • Increased ad revenue by 12% through advanced programmatic advertising integration with sophisticated audience targeting. • Improved maintainability and scalability by re-architecting frontend with modular component library and Redux state management patterns. • Technologies: TypeScript, JavaScript, React.js, Redux, PHP, Docker. ### Fullstack Developer @ Stand For Trees Jan 2018 – Jan 2021 Co-lead Full Stack Developer for Stand for Trees, a non-profit that enables businesses and persons to offset their carbon footprint by supporting environmental conservation projects all around the world. • Drove 15% enterprise revenue growth by co-leading development of B2B carbon credit marketplace connecting corporations with verified environmental projects. • Processed $2M+ in transactions through secure, scalable REST APIs integrated with third-party carbon verification systems and payment gateways. • Improved conversion rates by 20% via streamlined checkout experience with simplified payment flows and transparent pricing models • Enabled strategic decision-making by building real-time analytics dashboards tracking carbon offset metrics, revenue trends, and customer behavior. • Technologies: TypeScript, JavaScript, Koa.js, React.js, Docker. ## Education ### Bachelor’s Degree in Information Technology Instituto Universitario de Tecnología de Maracaibo Jan 2010 – Jan 2015 ## Contact & Social - LinkedIn: https://linkedin.com/in/victorcharrington --- Source: https://flows.cv/victordcastilloharrington JSON Resume: https://flows.cv/victordcastilloharrington/resume.json Last updated: 2026-03-22