Miguel Vargas

Built a flexible recommendation system with rule-based, statistical, and foundation-model strategies,

enabling rapid A/B testing and iteration.

– Integrated Shopify Plus for 500+ medspas handling $1–$2M in weekly GMV, scaling platform operations

for high-volume clinics.

– Strengthened compliance by implementing a one-PC-per-medspa model in California for direct MD pay-

ments and building Stripe reporting for multi-state regulatory requirements.

– Led a team of 6 engineers as technical lead for FastAPI backend and Vue.js frontend, owning architecture, code quality, and mentoring.

– Architected multi-tenant SaaS platform with FastAPI and PostgreSQL using schema-level isolation, re-

ducing infrastructure costs by 40% ($150K–$250K annually) and enabling rapid client onboarding.

– Built and enforced a CI/CD pipeline with 80% minimum test coverage, automated linting, and formatting checks, significantly improving code quality and reducing production issues.

– Deployed climate risk models with FastAPI and pandas to quantify financial impact of climate scenarios on commercial buildings for insurance and risk management decisions.

- Owned and scaled the backend as sole engineer, supporting 30 stores, 3,000+ daily users and 1,000 orders.

– Built Admin Portal with Flask on AWS Lambda to empower non-technical users to manage stores, process refunds, and adjust parameters for streamlined daily operations.

– Integrated key APIs including Stripe for seamless payment and refund handling, Leanplum for marketing campaigns (replacing OneSignal), and Slack for automated daily order reports.

– Architected a serverless staging environment with AWS CDK and automated deployments via GitHub Actions, reducing infrastructure costs by paying only for execution and enabling fast, reliable releases.