Open to opportunities

Jay Murillo

@jaymurillo

Message

I build scalable full-stack applications with backend, testing, and CI/CD focus.

Costa Rica

Message

What I'm looking for

I'm looking to build production systems where I can contribute across backend and full-stack development, strengthen CI/CD and automated testing, collaborate in Agile teams, and work responsibly with secure, compliance-regulated data.

I've built and maintained scalable applications at Pernix Solutions using Next.js, Ruby on Rails, Node.js, Supabase, and Vercel.

I contributed to migrating HelloCollege from Ruby on Rails and React to Next.js with TypeScript, improving performance, SEO, and maintainability. I also implemented GitHub Actions CI/CD pipelines that reduced deployment time by approximately 40%.

I write automated Playwright and RSpec test suites across E2E, smoke, regression, and integration layers, achieving 80%+ coverage. By introducing cybersecurity measures and structured testing strategies, I helped reduce production defects by approximately 60%.

I work closely with cross-functional teams through Agile and Scrum practices, while handling compliance-regulated data with secure coding, structured logging, privacy standards, and AI-assisted Human → AI → Human review workflows.

Experience

Work history, roles, and key accomplishments

Full Stack Engineer

Pernix Solutions

Jan 2025 - May 2026 (1 year 4 months)

Built and maintained scalable applications using Next.js, Ruby on Rails, Node.js, Supabase, and Vercel. Contributed to migration of HelloCollege from Ruby on Rails + React to Next.js (TypeScript), improving performance, SEO, and maintainability.