Julian Sommer

Systems Engineer in Sydney, Australia

I build backend systems and cloud infrastructure, mostly in Go and TypeScript.

Experience

  1. Mulga

    Nov 2025 – Present

    Junior Systems Engineer

    • Core contributor to Spinifex, an open-source cloud platform that recreates AWS on bare metal
    • Built 100+ AWS-compatible API actions from scratch across EC2, IAM, RDS, IMDS, STS
    • Developed a React and TypeScript AWS management console with login using STS temporary credentials
    • Wrote single-node and multi-node E2E test suites covering every implemented command
    • Set up GitHub Actions pipelines for testing, linting and security scanning
    • Go
    • TypeScript
    • React
    • Python
    • AWS
    • Docker

  2. Metatrail

    Sep 2023 – Dec 2024

    Junior Full Stack Developer

    • Cut JavaScript bundle size by 40% (500 KB to 300 KB) and raised the Lighthouse performance score by 50
    • Built a Go tool that detects a website's tech stack from its DOM and JavaScript signatures
    • Wrote a Python scraper that collected metadata and icons from one million domains
    • Generated SEO pages for the most popular categories and vendors with Next.js and TypeScript
    • Automated Docker image builds and publishing to GitHub Packages with GitHub Actions
    • Go
    • TypeScript
    • React
    • Next.js
    • Python
    • Docker

Projects

  • ACOA AI Sales Agent (Freelance)

    AI SMS agent that texts every new CRM lead within 3 minutes, qualifies them and hands hot leads to staff.

    • Integrated Zoho CRM webhooks and Twilio SMS, writing lead data from the conversation back to the CRM
    • Grounded the AI in a curated knowledge base with Bedrock Guardrails so it can't invent prices or course facts
    • Deployed on AWS (ECS Fargate, RDS, Bedrock) with CloudWatch alarms, budgets and data kept in Australia
    • Created a React web console where staff can read conversations, take over from the AI and view metrics
    • Go
    • React
    • TypeScript
    • PostgreSQL
    • AWS
    • Python

  • Sydney Suburbs

    Web app for tracking visits to all 650 Sydney suburbs, with notes, visit dates and progress by council.

    • Added suburb search and Google/GitHub sign-in to sync visits across devices
    • Wrote a data pipeline merging ABS Census, crime, tree canopy and Wikidata into suburb profiles
    • Drew a zoomable d3 map with heatmaps for income, rent and crime, and NRL club territories
    • Solid
    • TypeScript
    • PostgreSQL
    • Vercel

Education

  1. University of Technology Sydney

    Expected Nov 2027

    Bachelor of Computing Science

    • Major: Enterprise Software Development
    • GPA: 6.42/7.00

  2. Good Shepherd Lutheran College

    Jan 2020 – Nov 2024

    High School Diploma

    • Grade: 92.10 ATAR
    • Top of Grade: Digital Solutions, General Mathematics

  3. TAFE Queensland

    Jan 2022 – Sep 2023

    Certificate 3 in Information Technology (ICT30120)

    • Major: Cybersecurity

Skills

  • Go
  • TypeScript
  • React
  • Python
  • Solid
  • AWS
  • Docker
  • Terraform