Security Expert

JD.COM; Greater London; Presencial; GBP 90.000 - 130.000; Jornada completa

Descripción de la vacante

JD.com Inc. seeks a security lead to own end-to-end incident response in a 24/7 on-call model across global environments, operating during EMEA business hours. You will drive DFIR investigations, build automation and AI-assisted workflows, and collaborate with Threat Intelligence to strengthen detection coverage.

You will mentor engineers, develop runbooks, and help scale detection and response systems while applying MITRE ATT&CK knowledge to evolving adversary tactics.

Formación

• Experience in security incident response and investigations in cloud-first environments.
• Hands-on experience with SIEM, EDR, and/or detection engineering.
• Experience with cloud platforms (AWS & GCP).
• Familiarity with threat intelligence and adversary tactics (MITRE ATT&CK).

Responsabilidades

• Lead and coordinate end-to-end incident response for high-severity security events within a 24/7 global on-call model, with this role operating during EMEA business hours.
• Prepare clear executive communications that keep stakeholders informed during incidents.
• Investigate complex security incidents across cloud environments, applying strong DFIR methodologies.
• Build and enhance automation and AI-assisted workflows to improve triage, investigation speed, and response consistency.
• Partner with Threat Intelligence to contextualize threats and improve detection coverage.
• Conduct root cause analysis (RCA) and lead post-incident reviews to drive continuous improvement and risk reduction.
• Develop and maintain runbooks, playbooks, and operational documentation.
• Mentor other engineers and help elevate the team’s overall incident response maturity

Conocimientos

Security incident response

DFIR

Cloud security

Automation

Scripting (Python)

SOAR platforms

Threat intelligence

Executive communication

High-severity incident handling

Herramientas

SIEM

EDR

SOAR

AWS

GCP

Python

Descripción del empleo

You will lead high-impact incidents and investigations, drive continuous improvements in defense, detection and response capabilities, and help scale security operations through automation and intelligent workflows. Operating within a 24/7 global environment (follow the sun model), you will own the full incident lifecycle end-to-end - from detection and triage through containment, eradication, and recovery - while partnering cross-functionally to strengthen Joybuy's overall security posture. A key aspect of this role is leveraging automation and AI-driven approaches to improve detection fidelity, accelerate investigations, and reduce response times. You will help shape how modern tooling and data are applied to stay ahead of evolving adversary tactics. This role is ideal for someone who thrives in high-tempo environments, brings strong Digital Forensics and Incident Response (DFIR) expertise, and is equally passionate about operational excellence and building scalable detection and response systems and workflows.

Responsibilities

• Lead and coordinate end-to-end incident response for high-severity security events within a 24/7 global on-call model, with this role operating during EMEA business hours
• Prepare clear executive communications that keep stakeholders informed during incidents
• Investigate complex security incidents across cloud environments, applying strong DFIR methodologies
• Build and enhance automation and AI-assisted workflows to improve triage, investigation speed, and response consistency
• Partner with Threat Intelligence to contextualize threats and improve detection coverage
• Conduct root cause analysis (RCA) and lead post-incident reviews to drive continuous improvement and risk reduction
• Develop and maintain runbooks, playbooks, and operational documentation
• Mentor other engineers and help elevate the team’s overall incident response maturity

Qualifications

• Strong experience in security incident response and investigations in cloud-first environments
• Hands-on experience with SIEM, EDR, and/or detection engineering
• Experience with cloud platforms (AWS & GCP)
• Familiarity with threat intelligence and adversary tactics (e.g., MITRE ATT&CK)
• Experience building or working with automation (e.g., Python, scripting, SOAR platforms)
• Ability to operate effectively during high-severity incidents
• Excellent written communication skills with a passion for clear, actionable documentation
• Growth mindset with a proactive approach to identifying and mitigating security risks

Required Skills

• Strong experience in security incident response and investigations in cloud-first environments
• Hands-on experience with SIEM, EDR, and/or detection engineering
• Experience with cloud platforms (AWS & GCP)
• Familiarity with threat intelligence and adversary tactics (e.g., MITRE ATT&CK)
• Experience building or working with automation (e.g., Python, scripting, SOAR platforms)
• Ability to operate effectively during high-severity incidents
• Excellent written communication skills with a passion for clear, actionable documentation
• Growth mindset with a proactive approach to identifying and mitigating security risks

Preferred Skills

• Preferred qualifications
• Certifications in offensive security, security engineering, cyber defense, or cloud platforms
• Demonstrable experience building and deploying agentic AI workflows to support detection, response, and remediation
• Experience in security competitions, Capture the Flags (CTFs) or testing platforms such as Hack The Box, TryHackMe, Overthewire, JD SRC