Senior Security Engineer – DeFi, AI Security

Ant-Tech

Senior Security Engineer securing fintech and blockchain infrastructure supporting DeFi and high-value digital assets. Building AI-powered automation, monitoring, detection, and incident-response capabilities.

Posted 8/13/2026full-timeRemote • 🇺🇸 United StatesSenior💰 $180,000 - $210,000 per yearWebsite

Core Competencies

Role fit

Core Competencies

Use this summary to align your resume positioning with the role.

Demonstrates extensive experience in security engineering, focusing on application security, security operations, and automation using AI. Proficient in conducting technical security assessments and implementing effective security controls across various platforms.

Highest-signal resume keywords

Security Engineering ExperienceTechnical Security AssessmentsPython ProficiencyAI Security AutomationEnd-to-End Security Project Management

ATS Keywords

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Applicant Tracking System Keywords

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Hard Skills

Application SecuritySecurity OperationsVulnerability ManagementSystem HardeningSecurity Policy AnalysisIncident ResponseSecurity ToolingSecurity Controls ImplementationTechnical Security AssessmentsAdversarial Mindset

Soft Skills

Excellent Communication SkillsCollaboration

Tools & Technologies

EDRSIEMClaude CodeCodexAI Development ToolsCloud SecurityOn-Chain MonitoringSecurity Automation ToolsAccess ReviewsSOC 2 Compliance

Industry Keywords

CryptoBlockchainDeFiOn-Chain SecurityFinancial InfrastructureTransaction Systems

Tech Stack

Tools & technologies

CloudJavaScriptPythonTypeScript

About the role

Key responsibilities & impact

Threat model new product features and integrations and strengthen systems with effective security controls
Operate and improve the application security toolchain while keeping it high-signal for engineering teams
Own day-to-day security operations across EDR, SIEM, on-chain monitoring, identity, and cloud security
Triage security alerts, investigate incidents, resolve vulnerabilities, and reduce security noise
Assess vulnerability and bug-bounty findings based on actual exposure and drive remediation through completion
Support incident response from initial investigation through resolution
Lead security tooling and projects from evaluation and vendor selection through company-wide implementation
Collaborate with engineering, infrastructure, product, and other teams
Automate security workflows using AI for vulnerability management, AppSec, access reviews, SOC 2 and audit evidence collection, vendor due diligence, and recurring security reporting
Build reusable AI components, Claude skills, and security agents for engineering and other teams
Partner with the Head of Security to build, operate, and scale the company’s security program

Requirements

What you’ll need

5+ years of hands-on security engineering experience across product/application security and security operations
Strong track record conducting technical security assessments of software and systems
Experience with system hardening, security policy analysis, and implementing effective security controls
Adversarial mindset and ability to think like an attacker and challenge assumptions
Proficiency in Python, TypeScript, or JavaScript
Experience working with Claude Code, Codex, or similar AI development tools
Hands-on experience applying AI/LLMs to security automation and building reusable tools adopted by engineering teams
Experience owning security projects end-to-end, from vendor evaluation and selection through organization-wide rollout
Experience securing high-value or high-throughput transaction systems
Excellent communication skills with ability to explain technical security risks clearly and drive findings to closure
Experience in crypto, blockchain, DeFi, or on-chain security is a bonus
Experience securing financial infrastructure or transaction-heavy platforms is a bonus

Benefits

Comp & perks

Remote-first working environment
Work from anywhere in the US & Canada
UK & EU candidates must be able to work EST time-zone hours
Regular company retreats and opportunities for in-person collaboration
100% employer-paid medical, dental, and vision premiums for employees
$1,000 work-from-home stipend
Monthly reimbursement for home internet, phone, and cellular data
Unlimited vacation
12 weeks of fully paid parental leave
Fertility benefits
Opportunity for incentive compensation
Equity participation
Performance-based bonus