Tessian UK - (Remote / London Office) Full-time

Tessian protects every business’s mission by securing the human layer 
The Tessian Cloud Email Security platform helps enterprises defend against email attacks, protect against data loss and respond to security incidents more efficiently. By combining artificial intelligence with an understanding of employee email behavior, Tessian is able to prevent complex email attacks and data loss incidents that evade Secure Email Gateways and the built in security controls of M365 and Google Workspace. 
The world’s largest banks, healthcare organizations, hedge funds and law firms all use Tessian to secure their email environments, data and people whilst saving their security team time. In 2022 alone, Tessian prevented hundreds of thousands of business email compromise attacks, data loss incidents and  saved hundreds of hours of work for security teams. 
Tessian is headquartered in London and Boston with 200+ employees globally and has raised over $120m in venture capital funding from world leading investors like Sequoia, Accel, Balderton, March, Citi and Okta. Tessian was recognized as one of Fast Company’s Most Innovative Companies for 2022. More information can be found at www.tessian.com.
Backend Engineering at Tessian
We are looking for a Staff Engineer to join our Gateway Integration team. The Gateway team is a small, but critical, team responsible for one of Tessian’s key customer integrations – a Mail Transfer Agent. The MTA server is highly optimised for email traffic and integrates with M365, G-Suite and Exchange Server. You will be joining the team at an exciting time, working to deliver a new multi-tenant architecture, with significant business and customer impact.
The Gateway team’s tech stack includes:
Typescript, NodeJS & Python
SMTP protocol
Docker and AWS Lambda/ECS
High volume NoSQL databases
Terraform built environments
Engage with the world of Typescript, Python 3 and AWS, architecting robust distributed systems designed to manage immense volumes of SMTP traffic with exceptional speed.
Embrace the responsibility of maintaining and supporting our essential business systems, always mindful of the interplay between scale, latency, and cost.
Take on the complex task of processing highly sensitive email traffic, a challenge that will refine your skills in data security and handling.
Cultivate a supportive environment by providing thoughtful, actionable feedback, fostering growth and development among team members.
Set technical direction for the team and understand what “good” looks like, maintaining a high level of technical quality across the team.
Bringing experience of working at scale, and having seen and solved diverse technical challenges in your career.
Product focus: you understand deeply how customers and the wider org are impacted by your decisions, and the work of those you influence.
Able to “see around corners” and proactively identify problems before they slow us down.
Excellent communicator, able to empathetically communicate and constructively challenge in both technical and non-technical contexts to a diverse audience.