Application Security Engineering Manager

Synthesia
London
Workplace: RemoteFull timeFunction: CybersecuritySkills: ["Communication","Leadership","Stakeholder management","Risk management","Problem-solving"]

Lead and grow a senior AppSec team within a fast-scaling AI/SaaS company, owning strategy, threat modelling, and secure tooling while embedding security into the engineering lifecycle and partnering with product and leadership.

Loading

Loading job details...

Preparing the role view and application actions.

FursaFursa
Synthesia
Synthesia
3 months ago

Application Security Engineering Manager

✓ Verified Job

Canonical indexed version, validated from employer's careers page.

Source: Company careers pageValidated by: Fursa AI
Last checked: 17 hours agoStatus: Live

Job Summary

Lead and grow a senior AppSec team within a fast-scaling AI/SaaS company, owning strategy, threat modelling, and secure tooling while embedding security into the engineering lifecycle and partnering with product and leadership.
Location: London
Workplace: Remote
Employment Type: Full time
Job Function: Cybersecurity
Seniority: Manager level

Key Responsibilities

  • •Lead, support, enable and grow the AppSec team — owning hiring, onboarding, performance, and career development for Senior and Staff-level Security Engineers, providing the best environment to do their work.
  • •Own the formalisation of AppSec strategy and roadmap, translating inputs into a clear, prioritised programme of work with measurable outcomes.
  • •Be a credible technical partner to the team — engage on threat models, security architecture, tooling design, and risk decisions, diving into details when it matters.
  • •Define and maintain the team's operating rhythm: OKRs, quarterly planning, cross-team coordination, and stakeholder communication up to leadership.
  • •Act as a key interface between AppSec and the rest of the organisation and leadership — building relationships with business leadership, engineering leads, Developer Platform, Architecture Working Group, Legal, Moderation, etc., to embed security into how Synthesia builds.

Pay and Benefits

Perks:Remote WorkAnnual LeaveReferral SchemeHome Setup

Key Requirements

  • •Strong engineering background in application security, with hands-on experience in threat modelling, secure design review, (AI-)SAST/SCA tooling, vulnerability management, and/or security automation.
  • •Very comfortable with Python and JavaScript. Experience with AWS and/or GCP from a cloud infrastructure perspective, and knowledge of GitHub Actions.
  • •Meaningful people management experience — hiring, growing, and performance-managing security engineers, and understanding what good looks like at senior IC levels.
  • •Led or significantly contributed to an AppSec programme in a fast-growing SaaS or AI company, ideally where engineering scaled faster than security.
  • •Genuine point of view on AI-native security engineering and how LLMs/agentic tools change the attack surface, with ability to lead credibly in this space.
Experience:AISaaSSecurity
Skills:CommunicationLeadershipStakeholder managementRisk managementProblem-solving
Languages:English
Tech Stack:PythonJavaScriptAWSGCPGitHub ActionsSASTSCAKubernetes

Company Brief

Synthesia
Provides an AI video generation platform that creates realistic synthetic presenters and video content from text, enabling enterprises to produce scalable training, marketing, and communications videos without cameras or actors.
Industry: AI & Machine Learning
Company Size: Large (251 to 1,000 employees)
Growth: Scaleup
Valuation: Unicorn (USD 1B+)
Funding: Series C
Headquarters: London, United Kingdom
Founded: 2017
WebsiteLinkedIn