Cloud Infrastructure Engineer

Ebury empowers ambitious businesses to unlock global growth, and we extend the same philosophy to our team members. We promote innovation, collaboration, and problem-solving, creating an inclusive environment where everyone feels valued, supported, and empowered to thrive.If you are a collaborative individual eager to transform how businesses operate on a global scale, we invite you to connect with us. Discover how Ebury can fast-track your career and help you shape the future.Senior Security Engineer - Cloud InfrastructureHybrid (4 days in office) in LondonEbury is making significant investments in its cloud infrastructure security to ensure the integrity and safety of our global financial services. As a Senior Security Engineer specializing in Cloud Infrastructure, you will be responsible for enhancing and managing the security posture of our cloud environments across AWS and GCP, focusing on network security, perimeter defense, and attack surface management.This hands-on position requires extensive expertise in cloud-native security controls, network architecture, and proactive defensive security operations. You will design, implement, and maintain security infrastructure that identifies and mitigates threats before they affect our operations. Collaborating closely with platform, infrastructure, and security operations teams, you will embed security best practices into our cloud foundations.Key ResponsibilitiesManage cloud security posture and attack surface: Ensure comprehensive visibility and control across AWS and GCP environments. Implement cloud-native security monitoring, detection, and alerting mechanisms to proactively identify and mitigate threats, establishing and enforcing security baselines through policy-as-code.Design and oversee web application firewall infrastructure: Maintain WAF configurations across AWS and GCP, creating and fine-tuning detection rules in line with application threat models and emerging attack patterns. Develop operational processes for rule management and incident response integration, collaborating with application teams to implement protections without disrupting availability.Architect network segmentation and isolation: Design and implement strategies ensuring proper separation between development, staging, and production environments. Define consistent patterns across multi-cloud infrastructure, apply zero-trust principles to workload communication, and document reference architectures for engineering teams.

About ClickHouseFeatured on the prestigious 2025 Forbes Cloud 100 list, ClickHouse stands as a pioneering and rapidly expanding private cloud enterprise. With an impressive client base exceeding 3,000 and an annual recurring revenue (ARR) that has surged over 250% year-on-year, ClickHouse is at the forefront of real-time analytics, data warehousing, observability, and AI workloads.Our remarkable growth trajectory was recently underscored by a substantial $400 million Series D funding round. In the last quarter alone, notable clients like Capital One, Lovable, Decagon, Polymarket, and Airwallex have either adopted or enhanced their use of our platform. They join a diverse roster of innovators in AI and global brands such as Meta, Cursor, Sony, and Tesla.Join us on our mission to revolutionize data utilization for businesses. Be a part of our exciting journey!About the TeamThe Cloud Infrastructure Engineering team is dedicated to constructing and maintaining the essential components of ClickHouse Cloud's data plane. This encompasses computing, networking, security, and a multi-cloud, multi-region architecture designed to deliver a reliable and scalable managed ClickHouse experience for our customers. We are in search of highly skilled and experienced cloud infrastructure software engineers to join our team, responsible for the design, deployment, and maintenance of our infrastructure.

Join our dynamic team at Shawbrook as a Cloud Infrastructure Engineer, where you will play a crucial role in designing, implementing, and maintaining our cloud infrastructure. Your expertise will help us leverage the latest technologies to deliver robust and scalable solutions that meet our clients' needs.

Who are we?At Ki Insurance, we are at the forefront of innovation in the insurance industry. We're not just insuring everyday things; we're insuring space shuttles, global tours, wind farms, and even the legs of footballers!Our mission is clear: to digitally disrupt and revolutionize a market that has been around for 335 years. In collaboration with Google and UCL, we've developed a platform that leverages algorithms, machine learning, and large language models, allowing insurance brokers to receive quotes in seconds instead of days.Ki proudly stands as the largest global algorithmic insurance carrier and has rapidly become the fastest-growing syndicate in the Lloyd's of London market, achieving an impressive $100 million in profit within just three years.Our teams come from diverse backgrounds and collaborate in an agile, cross-functional manner to create the best customer experience possible. With ambitious goals ahead, we’re looking for brilliant minds to challenge the status quo and help us reach new heights.Where do you fit in?As a Senior Cloud Security Engineer, you will closely collaborate with engineering teams across Cloud Services, Infrastructure, and Product teams to integrate risk-aware technical security controls into our services, products, and development workflows.Your responsibilities will include designing, implementing, and managing robust security measures across our cloud platforms. You will work in tandem with cross-functional teams to devise security strategies, automate security processes, and proactively detect and address potential threats. This position will also involve developing cloud-native security tools, automating our processes, and leveraging infrastructure as code.Moreover, this role will utilize AI to responsibly build automation and agentic AI workflows, enhancing productivity while ensuring data protection and appropriate security controls are upheld.What will you be doing? Cloud Security Architecture & Design:Design and implement security architectures for cloud systems, including GCP, Azure, AWS, or hybrid environments.Develop secure cloud architectures for AI/LLM workloads and AI-enabled services, focusing on isolation patterns, secure networking, and hardened runtime configurations.Ensure security configurations and infrastructure are reproducible through infrastructure-as-code (IaC), specification-driven development (SDD), and automated deployment pipelines.Automate cloud security processes utilizing agentic AI tools.Implement robust security measures across our cloud platforms.Provide insights and suggestions for improvements on Ki's current architecture.Security Governance & Policy:Establish and enforce security policies, standards, and guidelines for cloud services.Ensure compliance with regulatory requirements such as ISO 27001, SOC 2, SOX ITGC, NIST, GDPR, and others.Conduct security assessments and audits to identify vulnerabilities and remediate them accordingly.

Join Wiz, a pioneering force in cloud security, as a Cloud Security Research Engineer. In this pivotal role within our Product team, you will be instrumental in fortifying our customers' cloud infrastructures against cyber threats. Your innovations will not only enhance our security offerings but also contribute significantly to customer success and the advancement of cloud security technologies.

Join our dynamic team at Blockchain as an Infrastructure Security Engineer. In this pivotal role, you will be responsible for designing, implementing, and maintaining robust security architectures to safeguard our cutting-edge blockchain technologies. Your expertise will be essential in identifying vulnerabilities, managing security incidents, and ensuring compliance with industry standards.We are looking for a passionate individual who thrives in a fast-paced environment and is eager to contribute to the future of decentralized technologies.

Join Anduril Industries, a pioneering defense technology company dedicated to revolutionizing military capabilities through advanced technology. As a Senior Cloud Engineer, you will be an integral part of our Multinational Digital Infrastructure team, responsible for designing, deploying, and maintaining robust cloud environments that support sovereign and multinational military systems. Your work will directly contribute to enhancing Anduril’s global Maritime and AUKUS missions, ensuring our infrastructure is secure, scalable, and capable of meeting evolving mission requirements.

About Our TeamJoin the Applications Engineering team, a dynamic group that collaborates across research, engineering, product management, and design to deliver cutting-edge AI solutions for consumers and businesses alike.As a member of our team, you will play a vital role in managing the essential infrastructure that underpins products like ChatGPT and our API. This encompasses our Kubernetes clusters, infrastructure deployment, networking architecture, cloud abstractions, and much more.We are committed to learning from our deployments and spreading the advantages of AI while ensuring its responsible and safe application. For us, safety takes precedence over unrestricted growth.Role OverviewOur cloud infrastructure team is dedicated to constructing and sustaining infrastructure abstractions that empower OpenAI to deliver products efficiently and at scale.Key Responsibilities:Design and develop robust development and production platforms that ensure reliability and security at scale.Guarantee that our infrastructure is poised to scale for future demands.Foster a diverse, equitable, and inclusive environment that encourages openness, welcome, and the challenging of conventional thinking.Participate in the overall responsibility for system reliability, including an on-call rotation for critical incidents.Ideal Candidate Profile:5+ years of experience in building core infrastructure systems.Skilled in operating orchestration systems, particularly Kubernetes, on a large scale.Experience in creating abstractions over various cloud platforms.Pride in developing and managing scalable, reliable, and secure systems.Comfortable navigating ambiguity and adapting to rapid changes.About OpenAIOpenAI is a pioneering AI research and deployment organization committed to ensuring that general-purpose artificial intelligence serves the greater good of humanity. We continuously push the boundaries of AI capabilities and are focused on the safe deployment of these technologies through our innovative products. Our mission is to prioritize safety and human needs while embracing diverse perspectives, ensuring that our AI tools are developed responsibly.

Abound is changing how consumer lending works in the UK and beyond. By combining advanced AI with Open Banking data, the company looks at a person’s complete financial situation, not just a credit score, to make lending decisions that are fairer and more accurate. Since launch, Abound has issued over £1.3bn in loans, with a credit performance that outpaces industry averages. The company became profitable within 2.5 years and has backing from major investors, including Citi and Deutsche Bank. With over £2bn in funding, Abound is recognized as one of Europe’s fastest-growing fintechs. Role overview This Senior Security Engineer position is based in London and sits within the Platform team. The role blends DevSecOps responsibilities, serving as a bridge between product engineering and Corporate IT. As a hands-on contributor, the Senior Security Engineer critically reviews security architecture across both production and internal IT environments. During the first 6 to 12 months, the focus will be on designing and implementing next-generation cloud security architecture in AWS and GCP. The role also involves building and maturing internal SOC capabilities, particularly around detection and response. What you will do Manage Microsoft Sentinel to strengthen SIEM/SOAR capabilities Automate RBAC for identity and access management across AWS, Microsoft Entra, and internal systems Embed security controls into GitLab CI/CD pipelines, including scanning, infrastructure-as-code reviews, and automated policy enforcement Support a shift-left approach by integrating security throughout the software development lifecycle Technology stack Cloud & Compute: AWS, ECS Fargate, Aurora, Lambda, GCP Data Lake: S3, DMS, Glue Security & Identity: Microsoft Defender (XDR), Microsoft Sentinel (SIEM/SOAR), Defender for Cloud (CSPM), Microsoft 365, Entra, Intune Cloud Security Tooling: GuardDuty, Security Hub, Inspector, Security Command Center Code & Infrastructure: Terraform, GitLab CI/CD

Join Us at Smarkets!Leading the Future of BettingAt Smarkets, we operate one of the most advanced prediction markets in the world, with over £29 billion in transaction volume since our inception in 2010. Our platform attracts over 200,000 traders from around the globe, transforming the betting landscape across sports and political events by offering the most competitive prices and fair odds.Our technology stack is tailored for scalability, reliability, and performance, utilizing Linux, Kafka, Postgres, and Kubernetes, powered by Python 3, C++17, and React. We build infrastructure that businesses rely on while ensuring trading remains accessible to everyone. We've demonstrated resilience through every market phase, competition, and industry upheaval.The key to our success lies in our people. We foster a high-performance environment where top talent flourishes, merging extensive business acumen with a commercial approach to propel strategic growth.If you are ready to contribute to the evolution of prediction markets with innovative technology and a client-centric mindset, Smarkets is the perfect place for you.We are currently seeking a Senior Cloud Infrastructure Engineer to enhance our infrastructure and equip our developers with efficient, self-service tools and operational excellence.Your RoleAs a member of the Cloud Infrastructure Team, you will engage with real-time distributed systems that fuel our trading engine. Your primary responsibility will be to design and maintain scalable, secure, and high-performance cloud-based systems while developing platforms that enable our developers to operate quickly, deploy reliably, and scale seamlessly.This role is not just about creating cloud infrastructure; it's about fostering a highly autonomous environment where ownership is encouraged, experimentation is welcomed, and innovation is integral to our operations. You will define the foundation of our cloud-native architecture, harmonizing visionary infrastructure design with the practical demands of a rapidly growing, large-scale environment.This position is where infrastructure intersects with engineering productivity: part DevOps, part Platform Engineering, and 100% essential to our mission.Your ResponsibilitiesDesign and Own Infrastructure: Architect and maintain robust, cost-effective, and secure infrastructure on AWS using Terraform, Kubernetes, and cloud-native best practices.Champion Platform Engineering: Develop and enhance the internal developer platform (IDP) that empowers engineers to self-serve infrastructure, CI/CD, observability, and security tooling.

Senior Oracle Cloud Infrastructure (OCI) ArchitectDesign at Scale. Lead with Authority. Deliver Secure, Enterprise-Grade Cloud Solutions.Join our dynamic team at Version 1 as a Senior Oracle Cloud Architect, where you will be instrumental in architecting enterprise-scale Oracle Cloud Infrastructure (OCI) environments.This role transcends simple implementation; we are in search of a strategic leader who can devise intricate, secure, and multi-region OCI architectures, tackle significant technical hurdles, and confidently guide solutions across infrastructure, network, and application domains.If you're passionate about navigating complex environments and relish the challenge of solving high-impact technical issues, this position offers the freedom and opportunity to truly make an impact.Your ResponsibilitiesDesign and implement robust, scalable, and secure Oracle Cloud Infrastructure (OCI) solutions that align with business objectives.Develop intricate network configurations including hub-and-spoke architectures and cross-region disaster recovery strategies.Lead the architectural design for cloud-based enterprise applications with a focus on resilience, security, and performance.Take charge of critical technical issues, diagnosing and resolving complex OCI networking challenges.Collaborate with on-premise network engineers and application specialists (JDE, PeopleSoft, EBS) to facilitate root cause analysis and resolution.Provide guidance and mentorship to fellow architects and engineers.Drive ongoing improvements through infrastructure reviews, optimization initiatives, and the adoption of new OCI capabilities.Establish and maintain comprehensive cloud architecture documentation and best practices.

Role overview The Presales Engineer - AI Cloud Infrastructure position at NexGen Cloud is based in London, UK, with a hybrid work arrangement. This role sits within the Sales department and reports to Sales Leadership for Hyperstack, the company’s AI cloud platform. What you will do This role connects prospective clients, the sales team, and internal engineering as NexGen Cloud’s technical offerings become more advanced. The focus is on supporting the commercial pipeline by guiding customers through technical decisions and shaping solutions that fit their needs. Lead technical discovery sessions to understand what customers require Design AI cloud solutions tailored to each client’s goals Facilitate in-depth technical conversations with customers and internal teams Ensure solutions are delivered with accuracy and meet client expectations About NexGen Cloud NexGen Cloud powers Hyperstack, an AI cloud platform used by clients ranging from AI researchers to large enterprises with demanding computational workloads. The company provides on-demand and private GPU infrastructure, focusing on high-performance solutions where speed and reliability matter most. The team values close collaboration and works at the forefront of AI cloud technology. Employees across NexGen Cloud use AI tools to solve technical challenges, deliver solutions quickly, and set new standards for enterprise GPU infrastructure.

About the RoleJane Street is seeking a skilled Infrastructure Security Engineer with a robust background in Windows engineering and hands-on experience with contemporary platform security measures to enhance the security of our IT platforms globally. In this pivotal role, you will exercise sound judgement and a keen sense of priorities to manage complex remediation tasks effectively. Your insights will guide our mitigation strategies and provide essential technical guidance for the team.Your responsibilities will include proactively designing, testing, implementing, and documenting strategic security measures. You will lead the coordination and delivery of security solutions across our IT infrastructure while discovering opportunities to automate intelligent workflows. Your expertise will be vital in securing both internal IT and remote working environments through a blend of technical execution, consultancy, and influence over the broader IT team. This position encompasses a variety of tasks, including building scalable security controls, investigating emerging threats, developing innovative security tools, and spearheading vulnerability management initiatives.As part of our IT Engineering department, you will collaborate with a dedicated team of engineers who oversee our operations across a diverse physical and virtual computing landscape spanning three continents. Your analytical skills and technical proficiency will be crucial in supporting our colleagues' daily operations and maintaining our systems at peak performance.

Join Zaizi as a National Security Cloud Engineer, where you will leverage your expertise in automating software delivery pipelines within expansive systems that utilize open-source technologies. At Zaizi, we are passionate about tackling intricate challenges through innovative thinking and cutting-edge technologies.Our workplace is characterized by an inclusive, modern, and collaborative culture, fostering creativity and innovation. We are in search of enthusiastic and solution-oriented individuals who thrive in dynamic environments. If you are eager to challenge yourself and contribute to a forward-thinking team, we would love to hear from you!

Join Flohealth as a Cloud Security Engineer, where you will play a pivotal role in safeguarding our cloud environments. Your expertise in cloud security principles and practices will be fundamental in developing and implementing robust security measures.In this role, you'll collaborate with cross-functional teams to assess and enhance our security posture, ensuring compliance with industry standards. Your contributions will directly impact the security and integrity of our data and services.

Join Starling Bank, the UK's pioneering digital bank, on a transformative mission to revolutionize banking! We harness technology to empower individuals to save, spend, and manage their finances more effectively.As a fully licensed bank in the UK, we embody the innovative spirit and agility of a tech company. Our approach is fairer, simpler, and designed to demystify money for everyone. With over 3,000 employees across London, Southampton, Cardiff, and Manchester, we foster a vibrant work culture.At Starling, our technologists play a crucial role in shaping our future, thriving in a dynamic environment focused on building and innovating cutting-edge fintech solutions. We embrace a flat organizational structure that encourages decision-making and collaboration across all levels. Our open culture ensures that support is readily available from your team and the wider business, promoting collective success!To excel at Starling, you should be self-motivated and take full ownership of your work. This includes everything from developing new solutions to sharing knowledge and enhancing processes for optimal customer outcomes. Our values—Listen, Keep It Simple, Do The Right Thing, Own It, and Aim For Greatness—are central to our mission.Hybrid WorkingWe offer a hybrid work model. While we encourage team interactions in the office, we prefer candidates to be within a commutable distance to one of our locations.Our Engineering EnvironmentStarling engineers are driven by the desire to deliver exceptional features. We welcome engineers of all experience levels who are passionate about coding and customer service. Our team is diverse and thrives on tackling various challenges together to transform banking for the better.As a Cloud Security Engineer at Starling, you will develop and maintain tooling and infrastructure across AWS and GCP, supporting internal operations and collaborating with various teams to deliver essential services for our business.

At Engine by Starling, we prioritize security as a vital component of our engineering practice. As a Senior Cloud Security Engineer, you will play a critical role in shaping the security architecture of our multi-tenant core banking platform. Your responsibilities will include writing code, automating security defenses, and ensuring our infrastructure across AWS and GCP is secure by design and compliant by default.Your MissionIn this dynamic role, you will lead initiatives to strengthen both our infrastructure and application platforms. You'll tackle complex security challenges through code, focusing on three key areas:Identity & Network Security: Develop robust IAM controls and implement zero-trust network architectures. You will refine edge-defense strategies ensuring every request is validated and encrypted.Unified Vulnerability Orchestration: Create a custom dashboard for security data by engineering API integrations between scanning tools, dependency trackers, and internal portals to establish a streamlined, automated vulnerability ecosystem.Compliance as Code: Align technical execution with regulatory requirements. Build automated systems that deliver real-time evidence for compliance frameworks such as SOC 2, ISO 27001 & PCI, reducing manual overhead.Your TeamYou will be a vital member of our expanding Security Engineering team, collaborating closely with our Infrastructure, Cross-Cutting, Information Security, and GRC teams. At Engine, we believe security should be integral to every technical process, not an afterthought. You will work collaboratively with engineers across the organization to create a resilient platform against evolving threats.About YouWe are seeking experienced Cloud Security Engineers, but we also welcome talented Software Engineers with strong programming skills who are eager to apply their expertise to security challenges. Engine engineers are driven by impact and high-quality outcomes, irrespective of their original tech stack. Whether you are a security specialist or a developer with a

* Fully remote from the UK * Innovative Ideas. Real People. At Orca Security, we believe that in the right environment and with the right team, talent knows no boundaries. Our collaborative spirit, combined with our ambition to continuously push limits, has swiftly propelled us to unicorn status, establishing us as a global frontrunner in cloud security innovation. If you're eager to join an extraordinary team that motivates one another daily, now is the perfect moment to find your place within our group. We are on the lookout for passionate and talented individuals like you to become a part of our R&D organization and contribute to our mission of reshaping the future of cloud security. Are you ready to take the plunge and swim with our pod? Position Highlights Rapid Growth: Over the last seven years, we have accomplished milestones that typically take other companies a decade or more. During this time, we’ve significantly expanded our workforce, broadened our customer base, and quickly enhanced our product capabilities. Disruptive Innovation: Our founders recognized that traditional security solutions were inadequate for the cloud, prompting them to forge a new path. We are relentless pioneers who have developed agentless technology and continue to lead as the most comprehensive and innovative cloud security company. Robust Financial Backing: With a valuation of $1.8 billion, Orca is a cybersecurity unicorn that dominates the cloud security sector. We are supported by a remarkable group of investors, including Capital G, ICONIQ, GGV, and SVCI—a collective of CISOs who invest their own funds following thorough due diligence. Respectful and Transparent Culture: Our executives take pride in their accessibility and believe in sharing knowledge with all employees. Every team member plays a crucial role in shaping the future of our industry. About the Role As a Senior Software Engineer on the DSEC (Data & AI Security) team at Orca Security, you will be part of a vital group dedicated to safeguarding customer data and AI assets at scale. The team is responsible for scanning and analyzing a wide array of data stores and AI services—from managed databases and container images to object storage buckets and virtual machines (VMs)—to uncover sensitive data, keys, personally identifiable information (PII), and misconfigurations. You will also have the opportunity to map, model, and assess cloud AI services, providing customers with clear visibility and security insights across their data and AI landscape. This role is ideal for those who are excited about building the infrastructure that supports our Data Security Posture Management (DSPM) and AI security capabilities. You will be instrumental in helping shape the future of cloud security.

Join the dynamic Engineering team at Engine by Starling, where we prioritize security as a fundamental engineering discipline rather than a mere checkbox exercise. As a Cloud Security Engineer, you will play a pivotal role in shaping the security architecture of our multi-tenant core banking platform. Your responsibilities will include writing code, automating security measures, and ensuring that our infrastructure across AWS and GCP is secure by design and compliant by default.Your MissionIn this multifaceted role, you will lead initiatives to strengthen both our infrastructure and application platforms. Your primary focus will be on solving intricate security challenges through code, emphasizing three key areas:Identity & Network Security: Develop robust IAM controls and zero-trust network architectures. You will enhance our edge-defense strategies and trust redirection to ensure that every request is authenticated and encrypted.Unified Vulnerability Orchestration: Create a custom dashboard for security data. You will engineer API integrations between scanning engines, dependency trackers, and internal portals to establish a cohesive, automated vulnerability management ecosystem.Compliance as Code: Bridge the gap between technical execution and regulatory compliance. You will develop automated systems that provide real-time evidence for compliance frameworks such as SOC 2, ISO 27001, and PCI, minimizing manual oversight.About the TeamYou will be an integral member of our expanding Security Engineering team, collaborating closely with our Infrastructure, Cross-Cutting, Information Security, and GRC teams. At Engine, we believe that security should be woven into every technical process, not treated as an afterthought. You will engage with engineers across the organization to create a resilient platform that can adapt to evolving threats.Who You AreWe are primarily seeking experienced Cloud Security Engineers, but we also welcome talented Software Engineers with strong programming skills who are eager to tackle security challenges.Engine engineers are driven by the impact of their work and the delivery of high-quality solutions, regardless of their original tech stack. Whether you are a security specialist or a developer with a security-first mindset, your role within the team will be shaped by your unique strengths and interests.Your ResponsibilitiesInstead of performing manual compliance checks, you will develop systems that automate this process.Security as Code: Design and maintain custom security tools in Go to automate evidence collection for SOC 2, ISO 27001, and the remediation of security alerts.