LP
Senior Information Security Advisor
LinkedIn Recruiter Post
Senior Information Security Advisor needed for a Financial Services client. 12 - month contract, hybrid in Ontario.
About the role
- Senior Security Engineer responsible for driving security posture at CoinPoker's crypto-poker platform. Collaborating with teams to identify and rectify security threats.
Responsibilities
- Own and drive the end-to-end security posture of all web, API, and infrastructure surfaces
- Identify, assess, and remediate vulnerabilities across frontend (web + Electron), backend services, and cloud infrastructure
- Design and enforce security controls at the Cloudflare edge — WAF policies, bot mitigation rules, Turnstile integrations, and rate limiting strategies
- Harden AWS environments: API Gateway, EC2, Lambda, S3, RDS, and supporting services in line with least-privilege and zero-trust principles
- Lead threat modelling sessions for new product features and flag security gaps before they reach production
- Monitor, investigate, and respond to security incidents — from Cloudflare firewall events and WAF alerts to SIEM-detected anomalies
- Conduct regular penetration testing and vulnerability assessments; triage and prioritise findings by business impact
- Define and enforce HTTP security header policies (CSP, HSTS, X-Frame-Options, Referrer-Policy) across all domains
- Build and maintain a DDoS response playbook; lead active mitigation during volumetric and application-layer attacks
- Partner with engineering teams to embed secure coding practices and participate in code reviews for security-sensitive changes
- Manage the responsible disclosure and bug bounty programme; triage external researcher reports
- Produce clear security reports, risk registers, and executive briefings; track remediation SLAs
- Stay current on emerging attack vectors, CVEs, and threat landscape changes relevant to online gaming and fintech platforms
Requirements
- 8+ years of hands-on experience in application, infrastructure, and web security
- Deep expertise in OWASP Top 10 vulnerabilities: SQLi, XSS, CSRF, IDOR, RCE, SSRF, and clickjacking
- Proven experience with DDoS attack detection, mitigation, and post-incident analysis
- Strong command of Cloudflare — WAF rules, Bot Management, Turnstile, Rate Limiting, Transform Rules, and Firewall Events analysis
- Hands-on AWS security experience: IAM policies, Security Groups, VPC design, API Gateway throttling, WAFv2, Shield, GuardDuty, and CloudTrail
- Deep understanding of API security: authentication flows (OAuth2, JWT, OTP abuse), rate limiting and endpoint hardening
- Experience securing frontend applications against XSS, CSP bypass, clickjacking, and third-party script risks
- Backend security expertise: input validation, secure coding practices, secrets management, SQL injection prevention
- Proficiency with penetration testing tools: Burp Suite, OWASP ZAP, Nmap, Metasploit, Nikto
- Experience conducting and managing vulnerability assessments, threat modelling, and security audits
- Solid understanding of TLS/SSL, HTTP security headers (HSTS, CSP, X-Frame-Options), certificate management
- Experience with SIEM platforms, log aggregation, alert tuning, and incident response
- Knowledge of bot mitigation strategies — JA3/JA4 fingerprinting, bot scoring, heuristic vs ML detection
- Familiarity with compliance frameworks: ISO 27001, SOC 2, PCI-DSS, or GDPR
- Strong written and verbal communication skills — able to produce security reports and brief non-technical stakeholders
- Hands-on experience integrating security testing into CI/CD pipelines: SAST, DAST, SCA, and secrets scanning as automated gates
Benefits
- Flexible work arrangements
- Professional development
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