Work: case studies by Sein Tun

“Architecting a five-milestone AWS platform in Terraform and a guarded AI-agent delivery workflow where agents open PRs and humans approve specs and merges; a 15-agent research run verified 44 of 45 spot-checked claims in 65 minutes.”

“Architected and shipped a no-code security-pipeline builder from zero to GA, adopted by the full customer base at launch; a connector templating layer cut integration delivery from 4 weeks to 1.5 weeks and runtime client errors by 60% (50 → 20 per week).”

“Led the Backbone/jQuery to React/TypeScript migration with AST codemods that converted hundreds of pages with under 5 production regressions, improved time-to-interactive by 30% (2,800 → 1,900 ms), and drove WCAG 2.1 AA compliance across 120+ dashboards.”

“Designed a Python/Celery/RabbitMQ event-processing pipeline sustaining 1,000 events/sec that eliminated 30 hrs/week of manual operator intervention (72% reduction), and cut mean time to resolution by 35% across 25+ P0–P3 escalations.”