Tim Hor

Building delightful products and reliable systems.

const skills = {
  languages: ["TypeScript", "Python"],
  frontend: ["React", "Angular"],
  backend: ["Node.js", "GraphQL", "PostgreSQL"],
  infra: ["AWS", "Cloudflare", "Terraform"],
  observability: ["Sentry", "SignalFX", "Splunk"],
};

Senior Software Engineer current role

Full Stack specialisation

6+ years experience

Sydney, AU location

recent experience

Atlassian

›

Senior Software Engineer - Confluence Whiteboards

Oct 2024 — present

→ Built an Easter egg racing game to market Confluence whiteboards in partnership with the Atlassian Williams F1 team, developing the controls and arcade racing physics under a tight timeline. Reached 9.4 million prospects, becoming one of the most successful novel marketing campaigns in the company.
→ Implemented whiteboard imports from Miro and Mural, specifically focusing on custom lines. Developed a waypoint-detection algorithm that achieved 99.5% import accuracy, directly driving deprecation of competitor whiteboarding tools across Atlassian and saving $166,000 annually.
→ Researched and proved out an alternative data persistence approach for freehand drawing functionality, delivering a 1460x performance improvement. Extended the feature to support shape and stamp creation from rough sketches, which won an innovation award and was subsequently filed as a U.S. patent.
→ Actively mentored interns, graduates and junior engineers through code reviews, pair programming and technical guidance, with a focus on building lasting capability rather than just unblocking.

Atlassian

›

Software Engineer - Confluence Whiteboards

Mar 2022 — Oct 2024

→ Architected and led delivery of customer data hard deletion across a distributed system – driving technical design, conducting spikes, and coordinating 10 engineers over 4 months. Fulfilled SOC 2 and ISO 27001 requirements, directly enabling enterprise adoption of Confluence whiteboards.
→ Designed and led implementation of a new serialisable data format for whiteboard portability, including a backfill across 4.6 million existing whiteboards. This laid the foundation for multiple downstream projects (including enabling LLMs to parse whiteboard content), unlocking rollout to a further 500,000 users.
→ Established a recurring 'war games' initiative to proactively stress-test infrastructure, reducing operational risk and building the team's ability to diagnose and resolve incidents independently.

Atlassian

›

Software Engineer - Cloud Editor

Oct 2021 — Mar 2022

→ Co-led a refactor of the typeahead component and API, resulting in a 90% improvement in quick-insert menu rendering time on the company-wide Confluence instance – from 140ms to 14ms.
→ Introduced stricter type safety across all editor plugins to eliminate an entire class of lifecycle-related bugs, reducing risk for new and external contributors working across the codebase.
→ Established weekly technical growth sessions to build a culture of knowledge sharing, giving engineers a regular forum to learn from each other across the codebase.