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Security Engineer 1, Application Security

100k – 160kUnited StatesSecurity EngineeringRemoteEntry level
Summary

Security Engineer contributing to application security assessments, vulnerability discovery, and custom tooling development. Owns components of client engagements and drives findings from discovery through delivery.

About the role

What You’ll Achieve

Security Assessment Ownership - Lead security assessments for specific components, modules, or systems within larger client engagements. Identify vulnerabilities, trace root causes, and own your analysis from discovery through client delivery.

Vulnerability Discovery and Analysis - Find and validate real vulnerabilities in application code and systems. Explain exploitation paths, assess impact, and develop proof-of-concept code when needed.

Custom Security Tooling - Design and build security testing tools and automation for vulnerability detection. Own tool development from concept through deployment on client projects.

Architecture and Threat Modeling - Conduct threat modeling and architecture reviews of software systems. Identify attack surfaces, data flows, and security boundaries. Propose concrete mitigations.

Client Communication - Translate technical findings into clear, actionable recommendations for engineering teams. Own client relationships for your component of the work.

Research and Innovation - Contribute to security research initiatives. Build tools, document findings, and stay on the cutting edge of vulnerability research and application security.

What You’ll Bring

  • Demonstrable vulnerability research capability - Proven ability to find and validate real vulnerabilities (CTF wins, published CVEs, bug bounty finds, or security research)
  • Strong code analysis skills - Read complex code, trace execution, identify logic flaws, and explain why something is exploitable
  • Hands-on coding proficiency - Fluent in at least two of: Rust, Go, C, C++, Python, JavaScript, TypeScript, or similar
  • Memory safety understanding - Understand memory corruption vulnerabilities (buffer overflows, use-after-free) and modern mitigations (ASLR, DEP, CFI)
  • Systems knowledge - Deep familiarity with operating systems, IPC, privilege boundaries, and how applications interact with system internals
  • Autonomous problem-solving - Drive your own work, own pieces of engagements, ask good questions, debug issues, and reach conclusions without hand-holding
  • Clear technical communication - Explain complex security findings to engineers; reports are clear and actionable

Nice to Have

  • Active CTF participation - Current or recent CTF team participation, CTF wins, or rankings
  • Published vulnerability research - CVEs, bug bounties, responsible disclosures, or security writeups
  • Open source security contributions - Tools, libraries, or research contributions to open source projects
  • Mobile security experience - Android, iOS, or macOS internals; binary analysis on mobile platforms
  • Published technical writing - Blog posts, security research writeups, conference talks, or technical documentation
  • Cloud security experience - AWS, GCP, or Azure security assessment and architecture review
  • Kernel or low-level development - Experience with kernel code, drivers, or system-level programming

About You

You're 0–2 years into your security career, or you're coming from software engineering with a strong security foundation. You have proven ability to find vulnerabilities and understand how systems break. You're autonomous, you own your work, you drive your own analysis, and you don't need someone looking over your shoulder.

Skills
RustGoCC++PythonJavaScriptTypeScriptVulnerability ResearchCode AnalysisThreat ModelingMemory SafetySystems Programming
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