Jesse Hallam
Principal Engineer at Mattermost
Prince Edward Island, Canada
Summary
🤩
Rockstar🎓
Top SchoolJesse Hallam is a Principal Engineer with 11+ years of full-stack experience, currently driving architecture and delivery at Mattermost from Prince Edward Island. He blends hands-on expertise across React/Redux front-ends, Go/PHP backends, PostgreSQL tuning, and embedded C++—often moving between layers to accelerate product outcomes. At Mattermost he has led teams to ship developer tooling, Playbooks (incident and repeatable-process management), and private-cloud provisioning, while remaining an active core committer across web, desktop, plugin, and docs repositories. Known for improving performance (query indexing and websocket-driven config updates), he pairs pragmatic engineering with a maker’s curiosity and a preference for reducing scope to essentials. Outside work he describes himself as a follower of Christ and a father of four, signaling values-driven leadership and long-term perspective.
11 years of coding experience
18 years of employment as a software developer
Bachelor of Mathematics Honours Computer Science, Bachelor of Mathematics Honours Computer Science at University of Waterloo
Github Skills (35)
javascript10
develop10
restructuredtext10
github10
back-end-development10
electron10
incident-management10
apidoc10
webhooks10
rendering10
css10
rs10
user-interface10
render10
redux10
Programming languages (14)
Github contributions (5)
mattermost/mattermost-plugin-playbooks
Apr 2020 - Jan 2023
Mattermost Playbooks enable reliable and repeatable processes for your teams using checklists, automation, and retrospectives.
Role in this project:
Back-end Developer
Back-end DeveloperContributions:1 release, 1063 reviews, 336 commits in 2 years 10 months
Contributions summary:Jesse primarily contributed to the backend of the project by addressing issues related to incident management. Their commits involved modifying the channel name generation logic, implementing new endpoints, and making various code improvements. These changes included fixing bugs and adding features related to the core functionality of the incident collaboration service. The contributions involved enhancing the service by setting up the new database settings.
automationmattermost
mattermost/mattermost-redux
Feb 2018 - Mar 2021
Redux for Mattermost
Role in this project:Full-stack Developer
Full-stack DeveloperContributions:17 reviews, 43 commits, 68 PRs in 3 years 1 month
Contributions summary:Jesse primarily focused on improving the Mattermost-redux codebase by updating eslint rules to enhance code quality. They made several changes to the channel actions, including creating and updating channels and managing their properties. The user also addressed websocket events related to configuration and license updates, while also refactoring existing events. They also added a preference selector for integers, improved file download URLs, and addressed custom emoji handling.
mattermostredux
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