Summary
Overview
Work History
Skills
Websites
Select Open Source
Timeline
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Trevor Hartman

Trevor Hartman

Billings,Montana

Summary

Growth minded full stack software engineer with over two decades experience building apps, services, and cloud infra across many languages and technologies. Scales people, teams, and tech. Obsesses over the details.

Overview

12
12
years of professional experience

Work History

Chief Technology Officer

Prophet Town
06.2024 - Current
  • Managed agency-wide architecture, engineering practices, and defined a common tech stack to prioritize high quality high velocity app development at Prophet Town, a 40-person development agency
  • Managed relationships with contracting clients and lead development teams ensuring successful on-time delivery of complex technical projects
  • Sourced and closed new clients for the development agency

Senior Staff Engineer / Head of Developer Experience

Carta
08.2020 - 05.2024
  • Lead and managed the Developer Experience team within the Platform Infrastructure organization
  • Designed a self-service Internal Developer Platform to enable Carta's 350 product engineers to effectively utilize the vast array of systems that make up Platform Infrastructure without needing to become experts in cloud infrastructure

Senior Member of Technical Staff

eBay
09.2017 - 07.2020
  • Built and documented new features such as GitHub, Jira, and PagerDuty integration for Yetibot, used by teams across eBay in our 10,000-person Slack instance
  • Gave a talk on Yetibot at Clojure/north in Toronto
  • Ran a Clojure workshop at eBay's San Jose campus

Founding Software Engineer

Lab79
01.2017 - 09.2017
  • Designed and built foundational infrastructure, Clojure services, and ClojureScript frontend apps for an early-stage Electronic Health Records (EHR) startup in the heavily regulated medical space
  • Created a powerful schema-agnostic Authorization solution for Datomic Datalog, mirroring the shape of Datomic Pull queries to protect patient data with support for arbitrarily nested collections in Clojure
  • Heavily utilized Clojure spec to ensure correctness at test and run time, and generate test data for unit tests and property-based tests
  • Built a real time streaming solution using Onyx to populate ElasticSearch indices with records from Datomic
  • Built patient EHR application frontend with Om.next in ClojureScript against a Clojure backend service
  • Designed and built secure HIPAA-compliant cloud native infrastructure on Google Cloud Platform using Kubernetes (GKE), Helm, and Docker
  • Designed declarative infrastructure as code with Terraform and continuously delivered infra changes in CI via test, plan, apply steps
  • Secured traffic with TLS between endpoints of every service using HashiCorp Vault to issue on-demand X.509 certificates
  • Designed a CD pipeline on GitLab with auto-scaling build containers in a GKE cluster to rapidly deliver code to cloud environments

Member of Technical Staff

eBay
08.2013 - 02.2017
  • Contributed foundational features to a Scala-based horizontally-distributed columnar in-memory data store supporting sub-second, complex aggregations on top of hundreds of billions of listings
  • Advocated for and demonstrated the use of Scala in a Functional Programming style to ensure correctness and code-reuse
  • Developed distributed partitioning functionality using ZooKeeper and Ketama consistent hashing
  • Developed real time coordinated consumption of Kafka streams to support automatic failover while ensuring no messages were lost in a near-real-time ingestion pipeline
  • Added support for SQL queries using Apache Calcite and compiled queries
  • Created Ansible automation to manage provisioning, deployment and self-healing of multiple 120-node clusters

Skills

  • Engineering Leadership
  • Developer Experience
  • Typescript, React, Nextjs
  • React Native, Expo
  • Functional Programming
  • Kubernetes, Cloud Infrastructure
  • Distributed Computing
  • Ruby, Python
  • Scala, Clojure, Java

Select Open Source

  • Yetibot is a chatops platform written in Clojure. Originally started as a way to learn Clojure in 2011, it served as the entry into the Functional Programming rabbit hole, including ongoing discovery of Haskell, Unison, and Category Theory. Yetibot continues to be actively developed over a decade later.
  • dec is a library written in Clojure for handling environment config. It builds arbitrarily nested data structures from simple KV strings.
  • lein-inferv is an opinionated way of inferring a strictly increasing version from the current date, time, and git version for Leiningen projects.

Timeline

Chief Technology Officer

Prophet Town
06.2024 - Current

Senior Staff Engineer / Head of Developer Experience

Carta
08.2020 - 05.2024

Senior Member of Technical Staff

eBay
09.2017 - 07.2020

Founding Software Engineer

Lab79
01.2017 - 09.2017

Member of Technical Staff

eBay
08.2013 - 02.2017

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Trevor Hartman