Roberto Sabanal: Full-Stack and Frontend Developer Resume
Full-Stack and Frontend Developer and UI/UX Designer with 10+ years of experience designing and building web apps, platforms and marketing sites. Built the Goleansigma lean-audit web app (frontend and part of the backend, designed in Figma) for 50+ enterprise clients, and shipped features such as Chat Poll and a redesigned Artist Dashboard at Moment (acquired by Patreon in 2023). Strong in React, Next.js, Vue/Nuxt, Node.js and Webflow. Uses AI tools such as Claude, ChatGPT and GitHub Copilot every day for coding, refactoring, agentic coding and pair programming across most projects.
Selected Projects
Moment (acquired by Patreon, 2023)
- Shipped Chat Poll, Artist Onboarding, a redesigned Artist Dashboard and the Moment House Japan integration on a platform serving millions of users.
Goleansigma Lean Audit App
- Built Audit Dashboard, 5S/6S Audit, Task Management, Multi-Moment Analysis and User Management for 50+ enterprise clients; cut bug-related downtime by 40%.
Pictiva
- Event photo-sharing app for a German company: product design, website, web app and backend infrastructure for uploads and sharing.
Giya (personal project)
- Designed and built the brand, mobile app and marketing website for a bill-splitting app.
Url.bio
- Link-in-bio tool; real-time analytics and custom theming drove a 25% increase in daily active users (archived link).
Core Skills
AI Tools
Claude, ChatGPT, GitHub Copilot, agentic coding, AI pair programming, AI-assisted refactoring, prompt engineering
Frontend
JavaScript (ES6+), React, Next.js, Vue, Nuxt.js, Angular, Redux, HTML5, CSS3, Sass, Tailwind CSS, Styled Components, Framer Motion, Responsive Design
Backend
Node.js, Express.js, PHP, Laravel, API Integration, Prisma, Mongoose, PostgreSQL, MySQL, MongoDB, Supabase, Firebase
CMS and Platforms
Webflow, Shopify, WordPress, Relume
Cloud and Tools
AWS, DigitalOcean, Vercel, Webpack, Jest, Git
Design
UI/UX Design, Figma, Sketch, Photoshop, Illustrator, Animation, Blender, SketchUp
Growth
Technical SEO, Page Speed Optimization, Google PageSpeed Insights, A/B Testing, Personalization, Monetate, SiteSpect
Professional Experience
Apr 2026 - Present
Freelance Web and Mobile Developer / Designer
- Design, build and launch websites, web apps and mobile apps for clients, handling UI/UX design, development and deployment.
- Work with Figma, Webflow, React, Next.js and Node.js, and use Claude, ChatGPT and GitHub Copilot daily for coding, refactoring, agentic coding and pair programming.
- Work directly with clients on scope, timelines and feedback, and optimize sites for performance and SEO.
Nov 2025 - Apr 2026
Customer Experience Developer (Contract)
- Built A/B tests, personalization and product recommendation experiences in Monetate and SiteSpect using JavaScript, HTML and CSS.
- Worked with Customer Success, product and analytics teams to plan, launch and analyze experiments for client websites.
- Reviewed client tech stacks and optimized them to improve web performance.
Sep 2025 - Nov 2025
Webflow Developer / UI/UX Designer (Contract)
- Led the redesign of disfire.com.au and other Disfire Australia sites: designed pages in Figma and built them in Webflow and Shopify.
- Improved technical SEO and page performance for better search visibility and engagement.
Jun 2024 - Jul 2025
Webflow Developer / UI/UX Designer (Contract)
- Designed in Figma, built and maintained rupahealth.com and rupauniversity.com in Webflow, serving thousands of monthly visitors.
- Cut page load time by about 50% (measured with Google PageSpeed Insights) and grew organic traffic by 20% through code optimization and technical SEO.
- Worked with marketing and SEO teams to redesign high-converting pages and increase lead capture.
Nov 2021 - May 2024
Full-Stack Developer / UI/UX Designer (Contract)
- Designed in Figma and built the goleansigma.de website in Webflow.
- Designed in Figma and built the lean-audit web app, owning the frontend and part of the backend: Audit Dashboard, 5S/6S Audit, Task Management, Multi-Moment Analysis, User Management.
- Used by 50+ enterprise clients; reduced bug-related downtime by 40% through reliability and scalability work.
- Also designed and built pictiva.de and app.lebosol.de.
Feb 2021 - Oct 2021
Software Engineer (Frontend, Web App Design)
- Built and maintained features for a live-streaming and events platform serving millions of users worldwide.
- Launched Chat Poll and Artist Onboarding, and redesigned the Artist Dashboard to improve engagement.
- Enabled international expansion by implementing the Moment House Japan integration.
Jun 2019 - Dec 2021
College Instructor (Part-time)
- Taught multimedia and game development, including 2D/3D animation, drawing, and math and physics for games.
May 2019 - Nov 2020
Frontend Developer / UI/UX Designer
- Designed the app and led frontend development of url.bio using Vue and Nuxt.js.
- Integrated real-time analytics and custom theming, driving a 25% increase in daily active users.
Oct 2018 - Aug 2019
Frontend Developer
- Designed and built 20+ pages across snagshout.com and merchant.snagshout.com.
- Integrated APIs and improved frontend workflows, cutting feature delivery time by 30%.
Apr 2015 - Oct 2018
Frontend Developer / Designer
- Designed and built custom websites and web applications for client business needs, plus branding and marketing assets.
- Improved the security and performance of company platforms through regular updates and optimization.
Education
Jun 2011 - Apr 2015
Bachelor of Science in Information Technology
Capstone Project
Physics Eye: Physics CAI and Simulations. A tool that helps students learn classical physics in an interactive way using built-in simulations and games.