Looks like you have JavaScript disabled. For the full Twine experience, you will need to re-enable it.

Hi! I’m Jeo Carlo Ubao, a full-stack and mobile engineer with 3+ years shipping production web and mobile apps using React, Next.js, Flutter, React Native, and SvelteKit. I love delivering value for international clients and enjoy mentoring teams to ship robust software ahead of schedule. I’m an open-source contributor, community speaker, and I’m hands-on with cloud, DevOps, and AI-assisted development. I’m currently focused on building scalable web and mobile products, collaborating with international teams, and sharing knowledge through talks and writing. I thrive in fast-paced environments and enjoy turning complex problems into delightful, reliable experiences.…Hi! I’m Jeo Carlo Ubao, a full-stack and mobile engineer with 3+ years shipping production web and mobile apps using React, Next.js, Flutter, React Native, and SvelteKit. I love delivering value for international clients and enjoy mentoring teams to ship robust software ahead of schedule. I’m an open-source contributor, community speaker, and I’m hands-on with cloud, DevOps, and AI-assisted development. I’m currently focused on building scalable web and mobile products, collaborating with international teams, and sharing knowledge through talks and writing. I thrive in fast-paced environments and enjoy turning complex problems into delightful, reliable experiences.

Jeo Carlo Lubao

Full Stack Developer, Web Developer, Front-End Developer, +3





Hi! I’m Jeo Carlo Ubao, a full-stack and mobile engineer with 3+ years shipping production web and mobile apps using React, Next.js, Flutter, React Native, and SvelteKit. I love delivering value for international clients and enjoy mentoring teams to ship robust software ahead of schedule. I’m an open-source contributor, community speaker, and I’m hands-on with cloud, DevOps, and AI-assisted development. I’m currently focused on building scalable web and mobile products, collaborating with international teams, and sharing knowledge through talks and writing. I thrive in fast-paced environments and enjoy turning complex problems into delightful, reliable experiences.…Hi! I’m Jeo Carlo Ubao, a full-stack and mobile engineer with 3+ years shipping production web and mobile apps using React, Next.js, Flutter, React Native, and SvelteKit. I love delivering value for international clients and enjoy mentoring teams to ship robust software ahead of schedule. I’m an open-source contributor, community speaker, and I’m hands-on with cloud, DevOps, and AI-assisted development. I’m currently focused on building scalable web and mobile products, collaborating with international teams, and sharing knowledge through talks and writing. I thrive in fast-paced environments and enjoy turning complex problems into delightful, reliable experiences.

Available to hire

Hi! I’m Jeo Carlo Ubao, a full-stack and mobile engineer with 3+ years shipping production web and mobile apps using React, Next.js, Flutter, React Native, and SvelteKit. I love delivering value for international clients and enjoy mentoring teams to ship robust software ahead of schedule. I’m an open-source contributor, community speaker, and I’m hands-on with cloud, DevOps, and AI-assisted development.

I’m currently focused on building scalable web and mobile products, collaborating with international teams, and sharing knowledge through talks and writing. I thrive in fast-paced environments and enjoy turning complex problems into delightful, reliable experiences.

Skills

Experience Level

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Intermediate

Intermediate

Intermediate

Intermediate

Intermediate

Language

English

Fluent

Work Experience

Freelance Software Engineer at Self-employed

January 1, 2023 - Present

Owned end-to-end full-stack development of mobile and web applications, delivering frontend, backend, APIs, and cloud deployments using Flutter, React, AstroJS, Svelte, CI/CD pipelines, and cloud infrastructure, reducing feature rollout time by ~30%. Improved performance, authentication, and payment systems by refactoring UI components, optimizing backend integrations, and strengthening auth flows, achieving 1–2s faster page loads and ~25% fewer authentication errors. Applied modern engineering practices including automated testing, backend emulation, AI-assisted development, refactoring, and continuous integration to improve code quality, scalability, and release reliability.

Software Engineer at Ingenuity Software

January 1, 2024 - Present

Progressed from contributor to owning React Native and full-stack development across multiple projects, helping define architecture, coding standards, and team workflows, improving delivery velocity by ~20%. Expanded scope from feature implementation to end-to-end delivery, shipping production features using React Native, Vite + React + TypeScript, and Next.js, while actively reducing technical debt and improving maintainability. Took on increasing leadership responsibilities by stabilizing legacy codebases, unblocking teams in fast-paced Agile environments, and mentoring interns through best-practice training and AI-assisted development workflows.

Full Stack Engineer (Part-time) at SkyeDesk

January 1, 2026 - June 1, 2026

Mentored interns on production-grade and AI-assisted development workflows through code reviews and guidance.

Freelance Software Engineer at Freelance

January 1, 2023 - June 1, 2026

Shipped a Flutter VPN app to the Google Play Store in under 3 months, with a companion AstroJS marketing site. Built a community platform (React, Firebase) handling auth, real-time data, and user management.

Software Developer Intern at Infinity Hub

March 1, 2023 - May 1, 2023

Maintained a React Native consultancy app and led a Laravel/PHP networking platform for medical professionals.