Haley Lifrieri

Founding engineer at Koi, in New York. I build products end to end — from the first prototype to the infrastructure that keeps them running.

Reconciliation pipelines on AWS Bedrock, Terraform and Temporal in production, and the security program that took an early-stage company to SOC 2 Type 2.

Selected work

Most of what I've built over the past two years is private. These are written up to the depth I can share.

Koi2024 — present>98% accuracy

Reconciliation at Koi

End-to-end pipelines on AWS Bedrock that parse, normalize and validate high-variance financial documents at >98% accuracy.

AWS BedrockPythonTemporalPostgreSQLOCR/ETL

Koi2024 — present

Infrastructure that stays up

Terraform-defined AWS and Azure infrastructure with Temporal orchestration, built for high availability on mission-critical financial services.

TerraformTemporalAWSAzureGitHub ActionsHasuraPostgreSQL

Koi2024 — presentSOC 2 Type 2

Zero to SOC 2 Type 2

Led an early-stage company through SOC 2 Type 2 — secure AWS and Azure architecture, automated vulnerability remediation, and data privacy standards that held up under audit.

AWS InspectorVantaIAMVPC / WAFAzure APIMCloudWatch

Personal2024

roast-my-reads

A side project that takes your annual Goodreads wrapped to a new level — of criticism.

TypeScriptGoodreads dataLLM

About

I studied computer science at Harvard, graduating in March 2024 with a citation in Spanish. Since that September I've been the founding engineer at Koi, where I've built the document reconciliation pipelines, the infrastructure they run on, and the security program that got us through a SOC 2 Type 2 audit.

Before Koi, I built pilot web and mobile applications at CoordHealth, shaping the product from interviews with physicians and other users, and wrote R pipelines at the Harvard T.H. Chan School of Public Health that harmonized health incidence data with remote-sensing climate measures.

Education: Harvard College
B.A. Computer Science, 2024
Language citation: Spanish
Certifications: Azure AI Engineer Associate
EMT-B
Languages: English, Spanish (fluent)
Italian (intermediate)
Based in: New York, NY

Get in touch

I'm open to talking about founding and senior engineering roles, and always happy to talk about taking a product from zero to one — applied AI, the systems underneath it, and the decisions that turn a rough requirement into something people actually want to use.

Elsewhere