❖ Used Typescript, React.js, and Django to build and maintain a tool that enables dozens of users to upload, select, and crop at least 1000 images per project.

❖ Designed and built Rest APIs with Django, such as providing an aggregated QuerySet as metrics for users’ project status. Ensured that APIs satisfy the latency requirement of 200ms.

❖ Pioneered the use of AbortController to cancel obsolete fetches requests. Reduced unnecessary state changes, consequently DOM changes , by 35% across the codebase.

❖ Created common React components used in over 40 files.

❖ Collaborated with designers and data scientists to test how different presentations of Search features improve UX.

❖ Wrote technical design document for project, outlining deprecation, implementation, blockers, and A/B test plan.

❖ Led discussion with and leadership to gain their approval.

❖ Design protocol buffer that maps search result to feature proto. Implement frontend component using Google’s internal toolings to render the feature proto.

❖ Perform analysis on live experiment results with data scientists. Using the project - Replacing Appbar with Minibar for example, the live experiment covered 150 million unique users in 14 days.

❖ Experiment results showed no statistically significant changes in metrics, which is the hypothesis since the two components are similar in appearance.

❖ Enhanced the minibar by incorporating the new frontend soft-transitioning API, where navigating to the next query via Minibar tiles rebuilds the page on the client-side with protocol buffer from backend. Live experiment shows this enhancement reduced time to first click (ttfc) of the next query decreased by 3.00%

❖ Enabled Minibar to have a sort control when the data contains dates. Reduced manual refinement (manref) by 2.32% and further reduced time to first click (ttfc) by 1.59%.

❖ Built a Ruby on Rails generator for promotional landing pages. This eliminated the need to write boilerplate

code on a weekly basis, saving 2-3 hours of development time per week.

❖ Changed the loan application form from slim (a RoR templating language) to React.js, implemented

frontend address validations, improved data quality that used to aect 6% of applications.

❖ Refactored the partner referral tracking API, to give credit to the last referrer before the loan was approved,

as opposed to the strictly last referrer.

❖ Queried the PostgresQL database with SQL and generated CSV reports to analyze referrals that were

wrongly attributed.

❖ Collaborated with the finance team to reconcile mistaken attributions, which recovered $4,000 of lost

revenue for a referral partner.

❖ Designed a restful API RTPOS (real time point of sale) to be used by the stores of a major mobile carrier.

❖ Implemented Ruby on Rails routes that conforms to the restful API.

❖ Designed and implemented relational data models to persist data sent to RTPOS, such as customer PII.