Open to opportunities

Alan Kato

@alankato

Message

Senior full-stack software engineer specializing in scalable, secure TypeScript/Node/React systems.

United States

Message

What I'm looking for

I’m looking to apply engineering best practices to build scalable, secure full-stack systems—especially improving medical conversations—while owning architecture, CI/CD, reliability, and measurable business impact.

I’m a Senior Full Stack Software Engineer with over 7 years of experience architecting, developing, and maintaining scalable web applications. I focus on building secure, high-availability systems by making strong architectural decisions and choosing the right technologies for operational growth.

In my recent work, I architected and deployed a microservices-based web application with TypeScript and Node.js, supporting 50,000+ concurrent users. I’ve led monolith-to-microservices and legacy migrations, reducing deployment time by 60% and improving reliability by 40%, while delivering GraphQL APIs that cut frontend data retrieval latency by 30%.

I bring hands-on engineering depth across the stack—designing RESTful and GraphQL APIs, implementing OAuth 2.0 and JWT authentication, and improving performance through database optimization and event-driven architecture. I also mentor teams, implement testing with Jest/Cypress, and integrate systems like HL7 FHIR to improve how medical conversations are understood.

Experience

Work history, roles, and key accomplishments

Senior Software Engineer

Kellton

May 2024 - Apr 2026 (1 year 11 months)

Architected and deployed a TypeScript/Node.js microservices web application supporting 50,000+ concurrent users, reducing deployment time 60% via Jenkins and Docker CI/CD on AWS. Migrated a monolithic API to an event-driven architecture, improving reliability 40%, and built GraphQL APIs that cut data retrieval latency 30%.

TypeScript Node Microservices GraphQL Jenkins CI Docker AWS Jest PostgreSQL

Software Engineer

CITOC

May 2021 - Apr 2024 (2 years 11 months)

Engineered full-stack features with React/TypeScript and Node.js for a platform serving 1M+ daily requests, and led migration of on-premise applications to AWS to reduce operational costs by 30%. Implemented OAuth 2.0 and JWT authentication, automated infrastructure provisioning with Terraform and Ansible, and improved uptime to 99.9% using Prometheus and Grafana monitoring.

React TypeScript Node OAuth 2.0 JWT Terraform Ansible MongoDB Grafana

Software Developer

Hardin Technology

Jun 2019 - May 2021 (1 year 11 months)

Developed responsive Angular and JavaScript interfaces ensuring cross-browser compatibility and WCAG accessibility, and built RESTful APIs with Node.js and Express using Prisma ORM. Reduced application load time 50% through code-splitting and image optimization, and increased Jest and Mocha test coverage from 40% to 85% within six months.