Job Description
Key Skills Required
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Key Responsibilities:
Build and own deeply technical security improvements across our Cloud Infrastructure(s) and associated territory (AWS/GCP, Kubernetes, CI/CD), including shipping production changes yourself when needed.
Design, implement, and iterate on detection and response capabilities (SIEM, EDR/MDR, cloud-native detections, CNAPP) with an engineer’s bias for automation, reliability, and measurable outcomes.
Hunt, investigate, and respond to security alerts and suspicious activity end-to-end (triage → containment → eradication → recovery → learnings), including writing tooling and detection logic to prevent recurrence.
Build internal security tooling and automations (IaC, scripts, integrations) that reduce toil and raise the security bar by default.
Experience & Qualifications:
You’re a deeply technical security engineer with a builder/hacker mindset, able to go from idea → prototype → production and comfortable making changes directly in Cloud Infra / DevOps systems.
You have 5+ years of hands-on security engineering experience, ideally in a cloud-first SaaS environment.
Have worked in a fast-growing startup, scale-up and/or SaaS company.
We would expect you to have experience in:
Cloud security engineering in AWS and/or GCP, with the ability to implement improvements hands-on (IAM, networking, compute, storage, logging).
Kubernetes security (cluster hardening, workload isolation, runtime security, policy controls) and container ecosystems.
DevOps fundamentals: CI/CD security, secrets management, artifact integrity, and secure-by-default platform patterns.
Incident response and investigation, including creating repeatable playbooks and automating response where appropriate.
Strong programming/scripting ability (Python or similar) plus comfort with infrastructure-as-code (e.g., Terraform) and automation.
Serious agent coding - ideally you’re on the bleeding edge in the space.
Endpoint security tooling, such as CrowdStrike.
Bonus points for:
Hands on experience with any/all of: Hunters, Wiz, Falcon, Tracebit, Torii, Okta, Google Workspace, StrongDM, Github, StepSecurity, Dope Security.
Any relevant Information Security certification, e.g AWS Certified Security, GIAC GWEB, OSCP, or CSSLP.
The good stuff..
In addition to being a part of a great team, working in a fun and innovative environment, we offer:
A competitive salary + stock options in our fast-growing Series E startup
Remote-friendly environment
100% Medical, Dental & Vision
401k Plan
Paid parental leave
25 days of annual leave + Public holidays + paid sick leave
Fun culture with regular socials
A generous referral scheme
A brand new computer + monitor
Budget and support for conference travel, community events, and content production
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View Company ProfileSynthesia (operating at synthesia.io) is a synthetic media-generation platform engineered for businesses to create professional videos without cameras, microphones, actors, or studios. Founded in 2017 by a team of researchers and entrepreneurs from UCL, Stanford, TUM, and Cambridge and headquartered in London, United Kingdom, Synthesia transforms text scripts into presenter-led videos using AI avatars. Under the hood, the platform leverages advanced AI to generate lifelike audio-visual agents and cloned avatars, enabling users to produce high-quality video content at scale. This allows corporate clients—including over 90% of the Fortune 100, such as Amazon, Zoom, and Microsoft—to streamline training, onboarding, and internal communications. Backed by over $537 million in funding across multiple rounds, including a $200 million Series E at a $4 billion valuation, Synthesia is positioned as a category leader in AI-driven video production for enterprise applications.
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