Senior Security Engineer - Cloud SIEM

About Abound We’re redefining consumer lending in the UK, and beyond. Using advanced AI and Open Banking data, we make fair, affordable personal finance available to more people. While traditional lenders rely almost entirely on credit scores, we look at the full financial picture - how much you spend, and what you can afford to repay to build a deeper, more accurate understanding of each customer's unique financial situation. And we've shown it works at scale. We’ve issued over £1.3bn in loans directly to customers while delivering market-leading credit performance - for every 10 defaults the industry expects, we see only 3. We also reached profitability just 2.5 years after launch. Backed by £2bn+ of funding from top-tier investors including Citi, GSR Ventures, and Deutsche Bank, we’re recognised as one of Europe’s fastest-growing fintechs (Sifted, CNBC). Now, we’re expanding into new markets and product lines - and we’re looking for ambitious people who want to learn fast, take ownership, and grow with us. About the role: You won't be sitting in an ivory tower throwing policies over the fence. You will be embedded directly within our Platform team in a true DevSecOps capacity. Operating as a highly technical individual contributor, you will bridge the gap between product-led engineering and Corporate IT. You will play a hands-on role in challenging the security architecture of production and corporate IT infrastructure. In your first 6–12 months, you will design and implement our next-generation cloud security architecture across AWS and GCP, while helping to build and mature our internal SOC capabilities, including detection and response. You will take ownership of Microsoft Sentinel, enhancing our SIEM/SOAR capabilities, and strengthen identity and access management through improved and automated RBAC across AWS, Microsoft Entra, and internal systems. You will also drive a shift-left approach to security by embedding controls into GitLab CI/CD pipelines, including scanning, IaC reviews, and automated policy enforcement across the SDLC. Our technology stack: Cloud & Compute: AWS, ECS Fargate, Aurora, Lambda, GCP Data Lake: S3, DMS, Glue Cloud Security Tooling: GuardDuty, Security Hub, Inspector, Security Command Center Code & IaC: Python, Java, GitLab, AWS CDK, Terraform/CDK-TF Observability & Incident Management: AMP, Incident.io Who you are: * You are a security professional by trade, but a hacker by design. You have a strong track record in DevSecOps and cloud security engineering, with hands-on experience elevating the security posture of other organisations. * You are a strong Python developer. You know how to script automation, interact with APIs, and build security tooling from scratch. * You possess a rock-solid understanding of network security fundamentals and how they apply to modern, distributed cloud architectures. * You are comfortable owning both the build and run aspects of security—designing systems and responding to incidents. * You thrive in the dynamic, ambiguous, and fast-paced environment of a high-growth startup. You know how to balance rigorous security with engineering velocity. What you'll be doing: * Actively contribute infrastructure-as-Code (AWS CDK, Terraform) for security risks prior to deployment * Implement best practice network security across AWS and GCP (IAM, VPCs, encryption, logging, monitoring) * Embed zero-trust policies across the estate * Actively challenge the security standards of production applications and infrastructure * Embed security controls into CI/CD pipelines (SAST, dependency scanning, container security) * Partner with engineering teams on secure architecture and deployment patterns * Support secure SDLC practices and pre-deployment security reviews What we offer * Everyone owns a piece of the company - equity * Hybrid with 3 days a week in the office * 25 days’ holiday a year, plus 8 bank holidays * 2 paid volunteering days per year * One month paid sabbatical after 4 years * Employee loan * Free gym membership * Team wellness budget to be active together - set up a yoga class, a tennis lesson or go bouldering

GitLab is the intelligent orchestration platform for DevSecOps. GitLab enables organizations to increase developer productivity, improve operational efficiency, reduce security and compliance risk, and accelerate digital transformation. More than 50 million registered users and more than 50% of the Fortune 100* trust GitLab to ship better, more secure software faster. The same principles built into our products are reflected in how our team works: we embrace AI as a core productivity multiplier, with all team members expected to incorporate AI into their daily workflows to drive efficiency, innovation, and impact. GitLab is where careers accelerate, innovation flourishes, and every voice is valued. Our high-performance culture is driven by our values and continuous knowledge exchange, enabling our team members to reach their full potential while collaborating with industry leaders to solve complex problems. Co-create the future with us as we build technology that transforms how the world develops software. *Fortune 500® is a registered trademark of Fortune Media IP Limited, used under license. Claim based on GitLab data. Fortune 100 refers to the top 20% ranked companies in the 2025 Fortune 500 list, published in June 2025. Fortune and Fortune Media IP Limited are not affiliated with, and do not endorse products or services of GitLab. An overview of this role As a Senior Security Engineer on GitLab’s Security Incident Response Team (SIRT), you will play a critical role in defending GitLab.com and the broader GitLab environment against evolving security threats.  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 incidents end-to-end - from detection and triage through containment, eradication, and recovery - while partnering cross-functionally to strengthen GitLab’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 DFIR expertise, and is equally passionate about operational excellence and building scalable detection and response systems and workflows. WHAT YOU’LL DO * 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 Digital Forensics and Incident Response (DFIR) methodologies * Partnering with Signals Engineering to design and implement detection capabilities, including SIEM use cases, alerting strategies, and telemetry pipelines * 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 * Collaborate cross-functionally (Engineering, Infrastructure, Legal, Product, Communications, etc) during incidents and lead proactive initiatives (e.g. tabletops) * Mentor other engineers and help elevate the team’s overall incident response maturity WHAT YOU’LL BRING * Strong experience in security incident response and investigations in cloud-first environments * Experience using or administering Git/GitLab in a security or engineering context * 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) * Interest or experience in applying AI/ML or data-driven techniques to detection, triage, or response workflows * Strong analytical and problem-solving skills; 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 ABOUT THE TEAM The Security Incident Response Team (SIRT) is a globally distributed team of engineers split across 3 core regions; AMER, APAC and EMEA, and is at the forefront of security events that impact both GitLab.com and GitLab cloud and corporate environments. We are both reactive and proactive, leading security investigations, incident response support and response resolution, through to cyber threat analysis and detection and response engineering. Even though we’re a global team, we work together in a cross-regional manner and have automation and processes to facilitate collaboration when resolving incidents, handovers, and general collaboration for project work as well. HOW GITLAB SUPPORTS FULL-TIME EMPLOYEES * Benefits to support your health, finances, and well-being * Flexible Paid Time Off  * Team Member Resource Groups * Equity Compensation & Employee Stock Purchase Plan * Growth and Development Fund * Parental Leave  Please note that we welcome interest from candidates with varying levels of experience; many successful candidates do not meet every single requirement. Additionally, studies have shown that people from underrepresented groups are less likely to apply to a job unless they meet every single qualification. If you're excited about this role, please apply and allow our recruiters to assess your application. ---------------------------------------------------------------------------------------------------------------------------------- Country Hiring Guidelines: GitLab hires new team members in countries around the world. All of our roles are remote, however some roles may carry specific location-based eligibility requirements. Our Talent Acquisition team can help answer any questions about location after starting the recruiting process.   Privacy Policy: Please review our Recruitment Privacy Policy. Your privacy is important to us. GitLab is proud to be an equal opportunity workplace and is an affirmative action employer. GitLab’s policies and practices relating to recruitment, employment, career development and advancement, promotion, and retirement are based solely on merit, regardless of race, color, religion, ancestry, sex (including pregnancy, lactation, sexual orientation, gender identity, or gender expression), national origin, age, citizenship, marital status, mental or physical disability, genetic information (including family medical history), discharge status from the military, protected veteran status (which includes disabled veterans, recently separated veterans, active duty wartime or campaign badge veterans, and Armed Forces service medal veterans), or any other basis protected by law. GitLab will not tolerate discrimination or harassment based on any of these characteristics. See also GitLab’s EEO Policy and EEO is the Law. If you have a disability or special need that requires accommodation, please let us know during the recruiting process.