Brandon Stiles — Full‑Stack Product Engineer (AI Platforms)

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Authentication Redesign

Talkiatry

Designed and built a full passwordless authentication system—including magic links and OTP—using AWS Cognito, Lambda, and PostgreSQL, delivering secure, seamless login for 500k+ patients.

AWS Cognito Lambda PostgreSQL React TypeScript SQS

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Patient–Provider Messaging Platform

Talkiatry

Enabled HIPAA‑compliant patient–clinician messaging; led discovery with PM/Informatics, demoed workflows, and shipped with Lambdas + queues.

AWS Lambda SQS EHR APIs React Node.js PostgreSQL

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Agentic LLM Harness for Financial Workflows

Sema4

Built core features of the agent‑server harness powering our agentic LLM platform: an execution loop that calls LLMs, tools, and MCP servers, then carries out the work inside isolated Firecracker microVMs with Git‑like versioning over a virtual filesystem — giving financial‑services users full auditability into every automated action.

FastAPI Firecracker microVMs MCP LLM Orchestration Python Agent Harness

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Partner Enablement System

Greenlight

Improved partner onboarding and analytics with Segment + Datadog; collaborated with Sales/Marketing to surface metrics and reduce time‑to‑value.

Node.js MongoDB Segment Datadog Docker Kubernetes

About Me

I'm a software engineer with 6 years building production AI systems and high‑stakes platforms across fintech and healthtech. Most recently I did harness engineering for an agentic LLM platform — building the execution loop that lets LLMs call tools, MCP servers, and enterprise data sources, then carry out real work inside isolated microVM sandboxes with Git‑like auditability. I've tech‑led engineering initiatives and shipped features used by millions.

I'm frontend‑forward and full‑stack into Python, comfortable owning a system from product requirements through production. I've built agent versioning for ~10K users, an LLM document‑extraction pipeline, a passwordless auth platform for 600K patients, and fintech services running at 1M peak transactions per day.

And I'm effective past the code — discovery, live demos, and the stakeholder conversations that turn complex systems into real adoption.

When I'm not coding or demoing, you'll find me in Atlanta with my partner Savannah, exploring new places, new restaurants, and probably debating the best way to optimize something completely unnecessary.