Sebastian Vargas Cordero

Lead Security Analyst

Arkose Labs

Jul 2023 - Current (3 years 2 months)

• Lead SOC shift operations in Costa Rica, mentoring analysts and ensuring consistency, quality, and alignment across global security operations. • Act as the primary technical lead during high-severity incidents, delivering root cause analysis and strategic remediation to customers and stakeholders. • Designed and implemented rule-based detection systems and automation workflows, reducing triage time by 85% and scaling fraud mitigation capabilities. • Created a standardized POV trial framework, converting 12+ trials into $6.3M in annual recurring revenue by enabling rapid, tailored defense deployment. • Partnered with engineering and product teams to shape detection logic, reduce false positives, and align threat models with evolving

SOC Analyst II (OCI)

Oracle

Jan 2021 - Apr 2022 (1 year 4 months)

• Monitored and analyzed traffic across Oracle Cloud, escalating high-severity threats and supporting enterprise incident response. • Designed and replicated secure customer environments using OCI services (Compute, Load Balancing, WAF, Networking, Databases), applying security best practices including Zero Trust principles and micro-segmentation to minimize exposure and validate threat scenarios. • Developed custom WAF rules to mitigate web-based threats, enhance perimeter defense, and reduce false positives. • Created custom OCI dashboards and telemetry scripts to improve observability and proactively detect platform performance issues. • Collaborated with CSIRT & DevOps teams to strengthen platform security posture across implementa

Security Architect

Akamai

Sep 2020 - Dec 2020 (4 months)

• Conducted in-depth security consultations for customer environments, simulating and mitigating attacks such as SQL Injection, XSS, CSRF, DDoS, and Privilege Escalation in controlled testing environments. • Gained hands-on experience in managing and tuning WAF rulesets, including Rate Controls, Geo/IP firewalls, Reputation Profiles, and custom rule exceptions based on customer-specific risk posture. • Worked extensively with Akamai's Prolexic Routed, Kona Site Defender, Bot Manager, and Edge DNS, understanding their implementation, use cases, and threat mitigation workflows.

Full Stack Web Developer

Fiverr Freelancers

Feb 2018 - Sep 2020 (2 years 8 months)

Developed responsive web applications using React, Vue.js, and vanilla JavaScript, implementing complex state management with Redux and Context API for seamless user experiences. Built RESTful APIs and GraphQL endpoints with Node.js and Express, handling authentication, data validation, and integration with multiple databases and external services. Designed and optimized relational (PostgreSQL, MySQL) and NoSQL (MongoDB, Redis) database schemas, writing complex queries and implementing efficient indexing strategies. Created reusable component libraries and maintained consistent design systems across applications using styled-components, SASS, and modern CSS frameworks. Implemented real-time features using WebSockets and Socket.io for live n

Sebastian Vargas Cordero

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