Open to opportunities

Lance Crisang

@lancecrisang

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Full-stack engineer delivering practical, production-ready web, mobile, and AI-driven solutions.

Philippines

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What I'm looking for

I seek roles building end-to-end products where I can apply full-stack and AI skills, work on release pipelines, and improve user-focused performance in collaborative teams.

I am a full-stack engineer focused on delivering practical, business-ready solutions across web, mobile, and AI. I combine cross-platform iOS/Android development, progressive web apps, and backend services to ship reliable products.

I've led migrations, release pipelines, and performance optimizations — including a major React Native upgrade to meet App Store compliance, FPS improvements, and a reusable deep-linking system adopted across many screens. I have hands-on experience with LLMs, embeddings, RAG, and integrating external APIs for AI-driven workflows.

I hold a BS in Computer Science and have contributed to production apps, QA processes, and cloud migrations. I'm motivated by building scalable systems that reduce integration effort and improve user experience.

Experience

Work history, roles, and key accomplishments

Current

Frontend Developer

Current

App Bar

Jul 2024 - Present (1 year 5 months)

Led React Native upgrades and implemented a web Stripe subscription flow, preventing App Store removal and centralizing payments to reduce integration effort across 30+ screens; optimized rendering to improve FPS from 40 to 60 and designed an extensible deep linking system adopted across 10+ screens.

React Native JavaScript Stripe Performance Optimization CI CD

Software Engineer

Patentopia

Feb 2025 - Jul 2025 (5 months)

Developed an AI-driven patent search and novelty analysis platform using LLMs, embeddings, and RAG to automate workflows and integrated multiple patent APIs as data sources.