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Jaxon

CS + Math @ WashU, focused on distributed systems and robotics.
prev SWE @ Tesla, Capital One, and Spectrum.


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Hey, I'm Jaxon 🤙

Born and Raised Hawaii, island of O'ahu, I'm currently studying CS + Math at Washington University in St. Louis, with a focus on backend development and robotic systems.

Hobbies: Coding, Hiking, Fishing, Gaming

Fav Languages: Go, C++, Python


If my webpage is too long, checkout my resume:


Connect With Me 👋

The journey so far

My Path

2026
Capital One logo

Capital One

Incoming Software Engineering Intern

06/2026 — 08/2026

Joining Capital One's Cloud team as a Software Engineering Intern.

Tesla logo

Tesla

Software Engineering Intern

Fremont, CA · 01/2026 — 05/2026

Distributed Systems, Energy Backend Infra, and AI Agents.

2025
WashU McKelvey Engineering logo

WashU McKelvey Engineering

System Software Teaching Assistant

St. Louis, MO · 08/2025 — Present

Assist students with x86 assembly reading, C code, and memory concepts.

Spectrum logo

Spectrum

Software Engineering Intern

St. Louis, MO · 05/2025 — 08/2025

Service Delivery team — built cloud backend controllers in Salesforce Java.

WashU IT — Devstac logo

WashU IT — Devstac

Software Engineer

St. Louis, MO · 04/2025 — Present

Building full-stack software for internal and external clients, from web apps to mobile apps.

›Key skills

Key skills

  • Node.js + TypeScript
  • API Development
  • Supabase Database
  • React
2024
Health XR logo

Health XR

Founding Software Engineer

St. Louis, MO · 09/2024 — 01/2025

Built the first prototype of a Meta Quest XR healthcare assistant in Unity + C#, winning #1 at St. Louis Startup Tech Week.

›Key features built

Key features built

  • Integrated reality environment in Unity
  • Wrist button in the virtual world wired to a FastAPI backend
  • AI analysis of medical documents rendered into the 3D world
Flashcardify.ai logo

Flashcardify.ai

Software Engineering Intern

St. Louis, MO · 09/2024 — 01/2025

Built out backend infrastructure for flashcard decks with Node.js and Supabase.

›Key features built

Key features built

  • Deck privacy controls (public / private visibility)
  • Full-text search using Supabase
  • Tagging system for deck organization and discovery
  • Search matching by deck names and metadata
WashU McKelvey Engineering logo

WashU McKelvey Engineering

Data Structures & Algorithms Teaching Assistant

St. Louis, MO · 01/2025 — 12/2025

Guided students through data structures, algorithm implementation, and runtime analysis.

2023

Education

Washington University in St. Louis logo

Washington University in St. Louis

B.S. — CS + Math, and Entrepreneurship

GPA 3.76 · 08/2023 — Expected 05/2027

Pursuing CS + Math with a focus on systems and algorithms, involved in entrepreneurship and student organizations on campus.

›Notable classes & clubs

Notable classes

  • Cloud Computing
  • Intro to Cryptography
  • System Software
  • Parallel and Concurrent Programming
  • Linear Algebra (proof-based)
  • Object-Oriented Programming (C++)

Campus involvement

  • WashU Robotics (Project Lead)
  • Google Developer Group (Core Lead)
  • LNYF (Multimedia)

2019 — Present

A Lifelong Journey of Learning

Aspiring Software Engineer

What began as a simple curiosity for making a video game during the COVID-19 pandemic ignited my passion for all things software — and a lifelong drive to keep learning and building.

🌺

Where it all began · Oʻahu, Hawaiʻi


What I build with

My Tech Stack

Most of what I do sits close to the machine: backend systems, AI agents, and robotics. Everything here is something I've actually built and shipped, not just read about.

Focus area

01

Distributed & Backend Systems

This is the work I know best. Microservices and the infrastructure they run on, and keeping all of it correct once real traffic and weird edge cases start piling up.

What I've built

  • Built microservices powering energy-platform backend infrastructure at Tesla
  • Cloud backend controllers for Spectrum's Service Delivery platform
  • Real-time APIs and services over Supabase / Postgres at WashU's Devstac
  • Joining Capital One's Cloud team to keep building at scale
GoJavaMicroservicesNode.jsWebSocketsDockerREST APIsPostgreSQL

Focus area

02

Applied AI & Agents

I build with LLMs and agents where they actually do something, inside real products and hooked up to real machines, not just answering questions in a chat box.

What I've built

  • Building AI agents at Capital One and Tesla
  • Built Tandem, an MCP server where people and AI agents work on the same planning canvas together
  • Wiring agents to MCPs and skills so they can trigger real automation and physical movement
  • LLM analysis of medical documents inside a Meta Quest XR assistant
PythonAI AgentsMCPLLM IntegrationSkillsFastAPI

Focus area

03

Robotics & Low-Level Systems

The other side of what I do: low-level code and robotics. Machines that have to work in the real world, the concurrency and memory details underneath them, and increasingly an AI layer on top deciding what they should do.

What I've built

  • Project Lead for WashU Robotics, driving the team's ROS-based control work
  • Teach x86 assembly, C, and the memory model as a System Software TA
  • Concurrency and parallelism from Parallel & Concurrent Programming coursework
CC++ROSx86 AssemblyConcurrencyParallelismMemory Systems
04

Full-Stack Product

Whole products, from the first prototype to something people actually use.

  • Won #1 at STL Startup Tech Week with a Meta Quest XR health assistant
  • Flashcard backend: full-text search, tagging, and privacy controls
TypeScriptReactNext.jsSupabasePrismaTailwind

Languages I reach for

C++GoCPythonTypeScriptJavaC#

A few things I've built

Recent Projects

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Thoughts, notes & what I'm building

From the Blog

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Website Made by Jaxon Poentis
Website developed with Next.js and Typescript + MongoDB database. Background is made with Three.js.