Full time

Senior Security Engineer

Posted by Element • United Kingdom, United Kingdom, United Kingdom

📍 United Kingdom, United Kingdom 🕒 January 30, 2026

About the Role

Who we are

Element was originally created to hire the founding team behind the Matrix protocol – the leading project for open, secure, decentralised communication. 

Matrix’s mission is to make messaging as open as email, allowing everyone to choose where their data is hosted, enjoy private conversations and ultimately be in control of their communications. 

Element helps large organisations run Matrix at scale. Customers include the French, German and British governments, not to mention NATO and the UN.  

The Role

The Element Security Team raises security standards across Element and the wider Matrix ecosystem. We have a dual role: owning and delivering projects that materially improve infrastructure, products, and the Matrix protocol, while also acting as advisors and consultants to other teams to ensure security is built in everywhere. The team also serves as the Matrix.org Foundation Security Team with roughly a ...

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