Vincent Lillis

- Led the redesign and migration of legacy applications to React/Next.js and Vue/Nuxt.js, reducing technical debt and boosting application load times by 30%. - Engineered high-performance SSR/SSG applications, improving SEO rankings and time-to-interactive scores by 25%. - Integrated AWS Lambda and GCP Cloud Functions for serverless workloads, slashing infrastructure costs by 40%. - Implemented automated CI/CD pipelines via GitHub Actions and Jest/Cypress testing, achieving 95%+ code coverage and reducing deployment failures by 70%. - Built a Tailwind CSS-based component library used across 5+ internal projects, increasing design consistency and frontend development speed by 40%. - Enhanced app security with OAuth2.0 and JWT, leading to 100% compliance with internal access control policies. - Collaborated with cross-functional teams to release 12+ key product features, improving user satisfaction metrics by 18% according to post-release feedback.

- Developed and maintained 15+ backend microservices using Node.js, NestJS, and ASP.NET Core, contributing to an architecture that scaled for 100K+ users. - Designed and implemented GraphQL APIs that cut frontend data fetch times by 45% and reduced over-fetching issues. - Led cloud migration of backend systems to AWS (EC2, Lambda, RDS), improving uptime from 96.2% to 99.9%. - Automated deployment pipelines using Jenkins and GitHub Actions, reducing release cycles from weekly to daily. - Optimized PostgreSQL and MongoDB queries, reducing average response time from 300ms to 80ms on high-traffic endpoints. - Supported frontend migration from Angular to React.js, cutting UI-related bug reports by 30%.

- Delivered 10+ full-stack features using React.js and Next.js with server-side rendering, improving user retention by 20%. - Integrated ASP.NET Core APIs and optimized performance via code-splitting and lazy loading, reducing first-load time by 50%. - Practiced TDD using Jest and Playwright, cutting production bugs by over 60%. - Leveraged AWS CloudFront, S3, and Lambda to scale web apps across regions, reducing latency by 40% globally. - Partnered with UI/UX teams to A/B test features, achieving 12% improvement in feature adoption.