CrowdStrike seeks a Senior Intelligence Analyst (remote) for the Counter Adversary Operations Elite team to deliver threat intelligence, digital risk monitoring and dark web research for assigned customers. The role requires developing actionable intelligence, delivering briefings, triaging Falcon Counter Adversary Recon findings, collaborating across teams, and responding to customer requests. Minimum 2+ years specialized experience in cyber threat intelligence, digital risk monitoring and third-party risk management. Location options include Germany, Ireland, Romania, Israel and the United Kingdom (remote).

Twilio is hiring a Staff Enterprise Security Engineer (AI Security) to lead technical strategy and engineering execution for securing the enterprise AI ecosystem. Responsibilities include designing secure reference architectures, establishing AI vetting frameworks, developing agentic AI identity/posture management, coding (Python/Go/Java), and using IaC to maintain enterprise security posture. The role is remote and based in Ireland or the UK and requires 7+ years in security engineering and cloud/container security expertise.

CrowdStrike seeks a senior TAC Cloud security researcher to investigate cloud-conscious adversaries using cloud provider logs (AWS CloudTrail, Azure Activity Logs, GCP), reverse engineering, signature development (YARA, KQL, Athena, Snort/Suricata), and automation. The role produces intelligence reporting, supports incident response and detection engineering, and requires strong Python and malware analysis skills plus experience with IAM and cloud log reconstruction.

Mattermost is hiring a Senior Security Engineer to design and implement security tooling, harden cloud and IT infrastructure, detect/investigate/remediate incidents, administer IAM and security monitoring, and assess AI-enabled risks. Requires 3+ years in security engineering/incident response, experience with SIEM/EDR/SOAR, cloud security (AWS/GCP/Azure), Linux and Kubernetes/Docker, IAM, and Microsoft 365/Google Workspace management. Role is fully remote and based in the United Kingdom.

The role is the technical bridge between Tenable’s GTM teams and UK/EMEA partners (distributors and VARs). Responsibilities include field engagement across the UK and Europe, qualifying PoVs and aligning internal technical resources, running partner enablement programs (including a Guardian program), and translating Exposure Management into commercial propositions. The role requires 5+ years in pre-sales or partner engineering within a two-tier channel model.

Olo is hiring a Senior Security Engineer (Blue Team) to lead detection and response, conduct vulnerability assessments, manage incident response, and mentor other engineers. The fully remote UK role requires 5+ years in security engineering and operations with experience in SIEM, IDS/DLP/FIM, AWS security, IaC tools (Terraform/Ansible/CloudFormation), automation/scripting, and security architecture.

Principal-level role responsible for owning product security research: scanning the ecosystem for emerging threats in software supply chain and product security, translating findings into strategic risk mitigations, leading multi-quarter initiatives across product lines, partnering with engineering and executive leadership, mentoring teams, and representing Chainguard externally.

Veeva is hiring an Application Security Architect to provide subject-matter expertise and security guidance to product and IT engineering teams. Responsibilities include security architecture reviews, threat modeling, code analysis, implementing security best practices, and contributing to training. Requires deep knowledge of application security (OWASP Top 10), cloud platforms (AWS/Azure), SAST/DAST/SCA tools, encryption/key management, and 10+ years of experience.

CrowdStrike seeks a senior analyst for its Falcon Complete virtual security operations center to monitor and analyze security alerts, handle incidents across Windows, macOS, and Linux, perform malware and forensic analysis, execute remote remediation, improve detection and triage processes, mentor junior analysts, and produce customer-facing communications. Relevant experience areas include incident response, computer forensics, malware analysis, network forensics, systems administration, and programming/scripting.

Senior Backend Engineer on the Pipeline Security team responsible for designing and implementing backend architecture, RBAC, GraphQL APIs, and Kubernetes/Helm deployments for GitLab's native Secrets Manager. Work primarily in Ruby on Rails with some Go, own features end-to-end (design through production), collaborate cross-functionally, and focus on CI/CD and software supply-chain security (SLSA).

Join CrowdStrike's Red Team R&D to maintain and develop infrastructure used for simulated adversary operations. Responsibilities include reactive and proactive infrastructure support for EMEA/META, Windows and Linux administration, cloud (AWS/Azure/GCP) management, IaC projects, security/compliance, scripting in Python and Bash, and documentation. Position is primarily remote with occasional in-person work at the Reading, UK office.

Lead and implement incident response playbooks, perform incident response and coordination, and develop security automation and hardening. Role requires experience with SOAR and bespoke scripting, SIEM (ideally Google Chronicle and YARA-L), cloud environments (preferred AWS/GCP), container technologies (Kubernetes, Docker), EDR tools, and detection engineering. Involves cross-functional project leadership and on-call rotation.

Weekend-shift (Friday–Monday, 10-hour days) remote role based in the United Kingdom. Lead incident response engagements, perform host and network forensics across Windows, Mac and Linux, conduct threat hunting and basic malware analysis, work with outside counsel on intrusion investigations, produce written and verbal reports for stakeholders, and perform cloud incident response (AWS/Azure/GCP). Role expects team leadership, project management and strong communications.

SearchApi seeks a remote Anti-Bot Engineer to research and implement anti-bot evasion, reverse engineer detection systems (Cloudflare, Akamai, DataDome, PerimeterX, etc.), optimize Playwright/Puppeteer/CDP configurations, debug TLS/protocol fingerprinting (JA3/JA4, HTTP/2, HTTP/3/QUIC), analyze network traffic, and run headless browsers reliably at scale. Fluent English and deep hands-on experience with browser internals, fingerprinting, network analysis tools, and relevant tooling (Playwright, Puppeteer, Selenium, Wireshark, Burp Suite, mitmproxy) are required.

Work on the Falcon Host sensor (kernel-mode driver) and related cloud telemetry features. Responsibilities include designing, implementing, and owning cross-platform sensor features (Windows primary, also Mac/Linux), debugging low-level issues (memory corruption, process contention, performance), collaborating with distributed teams, and mentoring others. Requires strong C++ and Windows kernel/OS internals expertise; preferred experience with WFP, TCP/IP, USB, file systems, Agile and Git.