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[Remote] Lead Application Security Engineer

Remote, USA Full-time Posted 2026-06-21

Note: The job is a remote job and is open to candidates in USA. D24 Search is a Series D startup focused on building an innovative marketing platform that empowers marketers to engage audiences and activate data across various channels. They are seeking a Lead Application Security Engineer to define and enhance their application security posture as they scale their engineering team. The role involves hands-on work in the codebase, addressing security challenges in a multi-cloud environment, and influencing product development from a security perspective.

Responsibilities

  • Own our application security posture end-to-end
  • Shape what security looks like as we scale from 70 to 140+ engineers
  • Spend most of your time in the codebase, not in meetings
  • Solve hard problems at the intersection of security and distributed systems
  • Own your roadmap

Skills

  • 6+ years of experience as a security engineer with deep knowledge of distributed systems
  • Been an early security hire (first 3) at a SaaS product or data infrastructure company
  • Must have gone from Backend software engineer -> Security engineer
  • CS, Math, or Physics degree
  • Experience securing systems across multi-cloud and/or multi-region infrastructure
  • Securing multi-tenant platforms: tenant isolation, authorization models, etc
  • Privacy-adjacent security (PII handling, data residency, GDPR/CCPA technical controls)
  • Being an early security hire (first 1-3) at a SaaS or data infrastructure company
  • Securing multi-tenant platforms: tenant isolation, authorization models, etc
  • Cloud security on systems that span more than one cloud and operate against customer-owned accounts
  • Design and build of data infrastructure as an early engineer, not just a user. You helped secure it from early design or during major redesigns. You understand how it scales and how it's secured
  • Privacy-adjacent security (PII handling, data residency, GDPR/CCPA technical controls)

Benefits

  • Equity
  • Fully remote team
  • Highly competitive comp and benefits

Company Overview

  • D24 is a boutique recruiting firm offering white glove services for venture backed deep-tech starts ups from seed to IPO and beyond. It was founded in 2025, and is headquartered in London, GB, with a workforce of 2-10 employees. Its website is https://d24search.io/.
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