Ha L.

I help small teams turn messy exports, half built apps and manual work into tools that run on their own. Python automation, Stripe billing, dashboards and AI assistants, each one tested and handed over with a short guide. Right now I work in three roles, software developer at a kids streaming company, chief verification engineer at Redwood EDA, and researcher at the Unary Lab at UCF working with AMD. In my first week taking clients on Upwork I completed three projects and every client left five stars. Right now I work across six production repositories for a children's streaming platform on iOS, Android and web: React Native with Expo, Node.js, Next.js, PostgreSQL and BigQuery. I have shipped school single sign-on through ClassLink, an audio library with playback and listen-time tracking, a recommendation and autoplay engine, and Stripe and RevenueCat subscription flows. I also own the analytics side, from pipelines to the dashboards leadership reads. On the AI side, I build LLM pipelines as a contract engineer. I designed a router that tries a cheaper model first and escalates only when verification fails, which cut the cost of a full code-conversion job by more than 13x at the same quality bar. What I can do for you: - Automation: Python scripts, web scraping, browser automation, Google Sheets and Apps Script, API integrations - AI: assistants that answer from your documents with sources, AI agents, OpenAI and Claude integrations - Dashboards and data: Looker Studio, BigQuery, SQL, data pipelines and data-quality checks - Payments: Stripe checkout, subscriptions and webhooks - Fix, finish and deploy: bugs in an existing app, apps started with AI builders, deployment to Vercel, AWS or GCP - Web and mobile: Next.js, React, Node.js, React Native and Expo releases How I work: clear written updates, small changes you can review, tests where they matter, and no disappearing mid-project. I usually reply within a few hours. Examples of my work are in the portfolio section below.