Migrating Amazon Gift Card Experiences
Supported a controlled migration of gift-card experiences to a newer framework.
- Legacy Migration
- Traffic Routing
- Feature Flags
- Web Performance
- Frontend Systems
Midhun Darvin
Software Engineer at Builder.io
From their time as
Frontend Engineer
Amazon • 2021 - 2022
Overview
Midhun contributed to moving Amazon's electronic gift-card customer experience from a Perl-based framework to a Java-based framework. His work included frontend migration, traffic routing, feature controls, and performance monitoring.
The Story
Midhun joined Amazon's electronic gift-card experience as the team migrated customer-facing pages from a Perl-based framework to a Java-based framework.
The work required more than moving frontend code. Traffic had to move to the new pages in a controlled way, with routing rules and the ability to switch back if a rollout needed correction.
He tracked rollout quality through performance signals including initial page load, Largest Contentful Paint, Time to Interactive, and above-the-fold behavior. These signals helped the team assess the new experience as traffic moved.
The project gave him direct exposure to the discipline required for large-scale migrations: planning paths, preserving rollback options, and monitoring the customer experience during change.
Ownership Snapshot
Broad role
Frontend engineer on Amazon gift-card customer experiences.
Goal
Move customer traffic to newer web experiences safely.
Direct ownership
Contributed frontend migration work, routing decisions, and performance monitoring.
Team execution
Worked within the migration effort to validate rollout and rollback paths.