Vixay Software Engineer / Full Stack Developer

I build and run reliable software, from React front ends to cloud infrastructure, and untangle the systems in between.

See my work Get in touch

About

Theodore with his family and their two golden retrievers

I'm Theodore, a Portland-based software engineer with more than six years of experience across full-stack development, site reliability, and production support at Nike, New Relic, and Masterlinq.

I do my best work when I own a system end to end: building it, keeping it healthy in production, and fixing it when the data or integrations get messy. I care about security, observability, and leaving codebases better than I found them.

Experience

  1. Software Engineer 3 · Masterlinq

    May 2026 – Oct 2026
    • Owned production reliability for a multi-tenant e-commerce platform (.NET, React, MongoDB, Azure), fixing recurring crashes and slowdowns and introducing warm-up deployment slots.
    • Found and fixed a cross-tenant script-injection vulnerability and led an authorization audit that uncovered 57 unprotected admin endpoints.
    • Stabilized order posting to retailers' Ascend and Lightspeed POS systems across 30 accounts, fixing blocked queues, tax and discount errors, and duplicate orders.
    • Repaired supplier, payment, and shipping integrations (QBP, Stripe, ShipStation, Shopify), restoring 6,211 hidden products; built CI/CD workflows in GitHub Actions and reviewed PRs across 12 repos.

  2. Digital Launch Engineer · Nike

    Nov 2023 – Jan 2026
    • Tier 2 support for e-commerce launches and peak events, analyzing logs, writing database queries, and supporting engineering teams.
    • Built Python-based Slack bots to automate alerts, workflows, and operational support.
    • Built observability dashboards in Splunk, New Relic, and SignalFx and tracked order fulfillment and inventory after launches.

  3. Software Engineer II · New Relic

    Sep 2020 – Jun 2023
    • Developed features in Node.js, React, and Ruby on Rails on a Kanban team, deployed with Docker and Kubernetes.
    • Led multiple projects through the full development lifecycle with stakeholders and product management.
    • Used Terraform to automate deployment of alerts, dashboards, and services for better fault tolerance and deployment history.
    • Mentored and onboarded new team members. Promoted from Associate Software Engineer to Software Engineer II.

  4. Site Reliability Engineer · Nike

    Mar 2018 – Sep 2020
    • Grew from QA engineer intern to SRE intern to Site Reliability Engineer.
    • Built features in C#, Angular, Java, Node.js, and React on Azure and AWS.
    • Implemented monitoring and alerting with SignalFx and Catchpoint, and automated data validation with Postman scripts.

  5. Senior Technical Support · Portland State University

    Jan 2019 – Mar 2020
    • Coordinated and trained more than 80 student volunteers providing Tier 1 IT support at the Computer Action Team, and handled Tier 2 escalations.

Projects

HomeCal

A self-hosted family calendar kiosk I'm building as a DIY replacement for a Skylight wall calendar. A TypeScript sync worker pulls Google Calendar and iCloud events (including recurring events and time zones) into MongoDB, and a TanStack Start app renders month, week, and day views on a wall-mounted screen. The whole stack starts with one Docker Compose command, and only the worker ever sees calendar credentials.

  • TypeScript
  • React
  • TanStack Start
  • MongoDB
  • Docker

tvixay.com

This site. Started as a React app in 2018, rebuilt as dependency-free HTML and CSS that loads fast on any device.

  • HTML
  • CSS
  • AWS
View source →

Skills

Languages

  • TypeScript
  • JavaScript
  • Python
  • C#
  • Java
  • Ruby
  • SQL
  • C++

Frameworks

  • React
  • Next.js
  • Node.js
  • .NET Core
  • Rails
  • Django
  • Angular
  • Spring

Cloud & DevOps

  • AWS
  • Azure
  • Docker
  • Kubernetes
  • Terraform
  • GitHub Actions
  • Jenkins

Data & Observability

  • PostgreSQL
  • MySQL
  • MongoDB
  • New Relic
  • Splunk
  • SignalFx