Senior Information Security Engineer

Join Our Team at Motorway!Motorway is the UK's leading online marketplace for used cars, connecting private sellers with thousands of trusted dealers across the nation. Launched in 2017, our innovative approach has transformed the car selling experience, and we are proud to be backed by top-tier technology investors, having secured £143 million in Series C financing.This is an exceptional opportunity to become part of a rapidly growing scale-up during a pivotal moment in our expansion, contributing to positive change in the automotive industry.Your Role:As a Senior Developer Experience Security Engineer, you will play a crucial role in enhancing the security and scalability of our developer experience at Motorway. Our team is focused on building a new container platform utilizing AWS Fargate, and we are dedicated to improving our observability, reliability, and developer-centric tools.You will bridge the gap between the Developer Experience and Security Operations teams, ensuring that security strategies are seamlessly integrated into our platform abstractions, tools, and configurations. Your mission is to make the secure path the easiest path for our engineers as they build, deploy, and operate software.Key Responsibilities:Design, implement, and maintain secure-by-default platform capabilities, including IAM patterns, network primitives, secrets management, runtime protections, and encryption, that are user-friendly for product teams.Develop automated security checks and guardrails to enhance our security posture.

Over 500 million downloads. 80 million monthly users. A decade of relentless innovation – and we’re just getting started.Flo is the leading health & fitness app globally, dedicated to transforming the future of female health. With a $200 million investment led by General Atlantic, we proudly became the first app in our sector to achieve a $1 billion valuation in 2024. Our journey continues unabated.With 7 million paid subscribers and the highest-rated user experience in the App Store’s health category, we have spent the last decade building trust on a grand scale. Now, we are pioneering the next generation of digital health technologies – AI-driven, privacy-centered, and clinically validated – to empower our users to better understand their bodies.Your RoleThe Challenge AheadAt Flo, we’re more than just an app; we’re a thriving global community. As the number one women’s health app, we experienced 8.6 million new installs in the last month, along with a 2.8 million increase in active users.This extraordinary growth demands top-tier engineering talent. We are on the lookout for a Senior Developer Experience Engineer to join our Velocity team, which focuses on enhancing our internal platform. Your objective will be to create the foundational tools that empower our engineering teams to deploy code more efficiently, securely, and at a scale that most engineers rarely encounter.Your Mission: VelocityThe Velocity team aims to minimize friction in the development process. We see our internal developers as our primary customers. Your responsibilities will include:Simplifying Complexity: Craft intuitive tools that facilitate self-service, allowing developers to concentrate on core product logic.Standardizing Excellence: Integrate best practices, security, observability, and scalability into our core infrastructure, ensuring they are fundamental, not just afterthoughts.Your ResponsibilitiesEnhancing Developer Experience: Develop self-service tools that grant product teams the autonomy they need without compromising system stability.Platform Engineering: Design and advance our core technology stack (AWS, EKS, Terraform, Ansible).Systems Resilience: Spearhead reliability initiatives, encompassing business continuity planning and a sustainable on-call strategy.Privacy at Scale: Bolster the infrastructure for industry-leading privacy features, such as our TIME-recognized "Anonymous Mode." Observability: Deploy cutting-edge monitoring solutions (metrics, logs, tracing) to ensure swift identification and resolution of issues.

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

Job Title: Engineer II Location: London / Bristol / Edinburgh (Hybrid options available) Salary: £45,600 - £62,700 Team: Developer Experience Reporting To: Senior Software Engineering Manager This position is based in the UK and candidates must possess the right to work in the UK. Currently, we are unable to offer visa sponsorship for this position. Our commitment to building a diverse, global team is paramount, and our sponsorship policy is assessed on a role-by-role basis. Please check back on our careers site for future opportunities that may include visa sponsorship. Kaluza is revolutionizing the energy sector with our Energy Intelligence Platform, simplifying the complexities of energy management. We assist energy companies in addressing contemporary challenges while propelling the transition to a sustainable, electrified future. Our platform facilitates millions of real-time decisions across households, devices, markets, and grids. By integrating predictive algorithms with user-centric design, Kaluza ensures that clean energy is reliable, affordable, and seamlessly integrates into daily life. With teams spread across Europe, North America, Asia, and Australia, and a joint venture with Mitsubishi Corporation in Japan, we empower leading companies such as OVO, AGL, and ENGIE, alongside innovators like Volvo and Volkswagen. Where will I be working? You will be part of the Developer Experience (DevEx) team within our expansive Kaluza Technology community. Our team comprises a diverse group of data-driven and product-oriented Software and Production Engineers who are at the forefront of technological innovation and operate at an impressive scale. Together, we pursue engineering excellence by implementing best practices throughout the community. In this role, you will be instrumental in designing and enhancing our Internal AI Engineering Platform. Your responsibilities will include creating the infrastructure—from Model Context Protocol (MCP) servers to collaborative workflows—that enables our software teams to operate more efficiently and securely. Your contributions will significantly influence Kaluza's ability to eradicate defects, enhance productivity, and set the benchmark for AI-driven development. Our tech stack is dynamic, and you may work with: AWS, Kubernetes, LLMs (Claude, GPT, etc.), MCP servers, LangChain/LangGraph, and contemporary monitoring tools.

Why Join Deliveroo?At Deliveroo, our mission is to revolutionize how people shop and dine by seamlessly connecting consumers, restaurants, shops, and delivery riders. We strive to make food and product accessibility more convenient and enjoyable, empowering individuals to purchase what they want, when and where they desire.As a forward-thinking, technology-driven organization, we are leading the charge in one of the fastest-growing industries globally. Our small team is making a significant impact as we tackle some of the most fascinating challenges. We prioritize speed, autonomy, and innovative ideas, continuously seeking fresh perspectives.About the RoleIn the role of Senior Security Engineer, you will spearhead the development and implementation of security measures that safeguard our internal networks, workforce identities, endpoints, and corporate systems. Collaborating with security teams across the US, EU, and APAC, you will aim to minimize risk and enhance our security controls.Operating with significant independence, you will define the technical strategy, make architectural decisions, and oversee the execution of complex security projects from start to finish. Your focus will be on balancing risk mitigation with user experience, ensuring that security measures are effective without hindering employee productivity.This position emphasizes Identity and Access Management (IAM), Endpoint Security (EDR), Network Security, logging and detection engineering, and secure SaaS enablement. You will collaborate closely with IT, Legal, Privacy, Engineering, and business stakeholders to ensure that security is integrated as a fundamental practice across the organization.Our security protocols are aligned with recognized frameworks such as the CIS Critical Security Controls and the NIST Cybersecurity Framework (CSF).

Join Checkatrade as a Senior Security Engineer and play a pivotal role in safeguarding our systems and data. In this position, you will be responsible for designing and implementing robust security measures, monitoring potential threats, and ensuring compliance with industry standards. We seek a proactive individual who thrives in a fast-paced environment and is dedicated to continuous improvement.

Application Deadline: We are actively conducting interviews and aim to fill this position promptly as soon as we find the right candidate.THE OPPORTUNITYApollo Research is searching for a Senior Security Engineer to take full ownership of security protocols and practices within our organization. As the first dedicated security hire, you will play a crucial role in maintaining the trust of our innovative AI lab partners and supporting our research mission. This position is embedded within the engineering team and reports directly to the CEO.YOUR RESPONSIBILITIES WILL INCLUDE- Establishing and leading Apollo's security program. You will create and manage the security roadmap, perform risk assessments, and adapt the program as the organization evolves, defining the security posture in relation to our size, threat model, and partner relationships.- Fostering trust with our AI lab partners. You will be the primary contact for security teams of our partners, building relationships with their CISOs, and ensuring our security practices are documented and meet the necessary standards for our partnerships.- Setting security strategies for engineering. You will define security principles and an AppSec strategy that the engineering team will adopt, creating efficient pathways for secure development.- Defining the use of AI tools and integrations at Apollo. You will determine approved tools, data handling procedures, and vetting processes for new technologies, ensuring a balance between security and the need for cutting-edge research tools.- Managing our security tooling stack and automating operations. You will select, implement, and oversee security controls such as EDR/MDR, endpoint management, email protection, and identity management, while automating processes wherever feasible.- Leading compliance and certification efforts. You will spearhead certification initiatives (ISO 27001, SOC 2) as required, integrating compliance into our security practices.- Managing IT administration across the organization. You will oversee Google Workspace and other IT resources.

At Menlo Security, we are dedicated to empowering secure connections, communications, and collaborations worldwide. Our mission has become increasingly vital in the current landscape shaped by COVID-19. We proudly serve a diverse clientele, including Fortune 500 companies, 9 out of the 10 largest global banks, and the Department of Defense.As we transition from a team of 400 towards our next growth phase, we seek passionate individuals who exhibit empathy and adaptability. The ideal candidate will possess a strong ethical foundation, exceptional organizational skills, and a commitment to service. A willingness to both give and receive constructive feedback is essential.Backed by industry-leading investors such as Vista Equity Partners, General Catalyst, JPMC, American Express, HSBC, and Ericsson Ventures, Menlo is poised for significant growth.Position Overview:The Senior Security Engineer will play a crucial role in safeguarding our organization’s digital assets, infrastructure, and data. Responsibilities include designing, implementing, and maintaining security systems and controls, managing security tools, conducting risk assessments, responding to incidents, and ensuring compliance with relevant security standards. This position involves close collaboration with various teams within Menlo to promote security best practices across all technological initiatives, thereby enhancing our security posture and resilience.Key Responsibilities:Security Operations & Monitoring:Oversee the SIEM platform and manage security alerts to identify, investigate, and respond to potential threats.Administer and optimize EDR solutions, specifically Crowdstrike, to ensure comprehensive endpoint protection.Lead incident response efforts, including investigation, containment, remediation, and post-incident analysis.Vulnerability & Risk Management:Oversee the vulnerability management program, including scanning, prioritization, and coordination of remediation efforts.Conduct risk assessments and formulate strategies for risk mitigation.

Join Zopa as a Platform Engineer focused on enhancing developer experience! In this role, you will be instrumental in optimizing our development platform, facilitating a seamless workflow for our engineering teams. Your expertise in platform technologies will empower developers to build and innovate more efficiently.

At Kroo Bank, we are pioneering the future of banking through innovative technology and exceptional digital services. As the fintech sector rapidly evolves, our bank is committed to adapting our roles and responsibilities to seize new business opportunities and meet emerging challenges. We prioritize updating our job descriptions to maintain our leadership in banking innovation.Your Contributions and Key Responsibilities:In the role of Senior Security Engineer, you will play a crucial role in the design and implementation of security measures for our mobile applications, services, and websites, ensuring adherence to the highest security standards. Your expertise will be pivotal in continually assessing and enhancing our security systems, ensuring our products and services are secure by design and compliant with both internal and external regulatory requirements. Key responsibilities include:Security Analysis and Improvement: Continuously evaluate our security systems for potential enhancements, ensuring our defenses lead in cybersecurity practices.Vulnerability Management: Proactively identify, assess, and resolve security vulnerabilities to uphold the integrity and confidentiality of customer data.Security Automation: Streamline security processes and procedures to boost efficiency and effectiveness, minimizing the risk of human error.Security Requirements and Solutions: Define and document system security requirements, offering well-considered recommendations to management.Development of Security Standards: Create and maintain best practices and security standards within the organization, guiding teams in secure coding practices.Secure Design: Collaborate with development teams to ensure robust security measures are integrated into the design of web and mobile front-ends, along with microservice architectures.Cloud Security and Secure Infrastructure: Assist teams in identifying and addressing gaps in infrastructure security, aligning with industry security posture standards.Cybersecurity Collaboration: Work closely with stakeholders across the organization to ensure security measures align with our overarching cybersecurity strategy and protect the bank’s technology infrastructure.Regulatory Compliance: Support teams in meeting compliance requirements for internal audits and external regulators to mitigate potential fines and reputational damage.

Join Samsara as a Senior Security Engineer on our Vulnerability Team, where you'll play a pivotal role in enhancing our security posture. In this position, you will be responsible for identifying vulnerabilities within our systems and implementing effective solutions to mitigate risks. Collaborate with cross-functional teams to ensure the security of our products and infrastructure, and contribute to our mission of bringing transparency and safety to the IoT space.

As a Senior Software Engineer specializing in Proactive Security at Deliveroo, you will play a crucial role in safeguarding our platform against emerging threats. You will collaborate with cross-functional teams to design and implement robust security solutions that protect customer data and ensure the integrity of our systems.Your expertise in software development and security practices will be instrumental in identifying vulnerabilities and enhancing our security posture. This role will challenge you to think critically and innovate solutions in a fast-paced environment.

About Our TeamJoin the Local Developer Experience (DevEx) team at Deliveroo, part of the Foundations group, where we empower engineers to rapidly develop, test, and deploy high-quality services with confidence. We enhance and innovate the local developer experience across the Deliveroo group through a streamlined, DevContainers-based development platform, facilitating agentic workflows alongside integrated IDE tools. Our mission is to elevate engineering standards in Quality, Velocity, and Efficiency by creating scalable framework-level tooling and developer workflows.About the RoleAs a Staff Platform Engineer, you will be recognized as a subject matter expert in at least one key technical domain and will be responsible for implementing solutions that yield significant group-wide outcomes. You will lead the technical direction for your team, eliminate complex technical obstacles across multiple teams, and mentor fellow engineers. Reporting to senior managers, you will collaborate with leadership to drive broad impact.Your ResponsibilitiesTechnical LeadershipDefine and implement technical solutions for critical business challenges, gaining an understanding of the context surrounding major organizational decisions.Oversee the technical architecture for both local and remote development workflows, including DevContainers, IDE remote backends, and seamless integration points with our engineering ecosystem.Design and continually refine the paved-path developer journeys, focusing on time-to-first-change, onboarding processes (MSC distribution, Tailscale setup), IDE remote flows, and user experience for daily developer tasks. Measure and iterate based on developer metrics and feedback.Lead the integration strategy for remote execution (e.g., BuildBuddy), enhance development efficiency on the company monorepo (Pedregal), and establish caching/invalidation methods to ensure swift, predictable developer workflows.Additionally, manage project timelines and risks while maintaining a sustainable team pace.Collaboration & LeadershipFacilitate alignment among non-adjacent teams and disciplines (Product, Security, Core Infrastructure, and Product Engineering) to tackle unstructured challenges. This includes coaching team members at all levels and nurturing emerging leaders within the team.

Role overview Nexthink is hiring a Senior Corporate Security Engineer in London. This position focuses on protecting information systems and sensitive data by designing, implementing, and managing security controls throughout the corporate environment. What you will do Lead the creation and rollout of security measures for corporate systems Oversee the ongoing management of security protocols to keep data safe Work with teams across the company to identify and assess security risks Support compliance with relevant industry standards Collaboration This role works closely with cross-functional groups, making sure security stays a shared priority and that risk assessments are both thorough and actionable.

Causaly develops an AI-powered platform designed to help researchers and decision-makers in biomedicine quickly find and interpret evidence from scientific publications, clinical trials, regulatory documents, and complex data sources. The company’s mission centers on building a high-precision Knowledge Graph and applying generative AI to advance biomedical knowledge. Leading biopharmaceutical organizations use Causaly’s technology to accelerate drug discovery, improve safety, and support informed decisions. With backing from investors such as ICONIQ, Index Ventures, Pentech, and Marathon, Causaly continues to expand its product offerings and market reach. Role overview The Senior Security Engineer position at Causaly is based in London and offers the chance to shape the company’s security strategy and processes. This role provides significant autonomy and involves working closely with the security team, as well as collaborating across engineering and product groups. The Security Engineer will take ownership of vulnerability management, advise teams on security matters, and support SecOps activities. Expect to define strategies, build and refine processes, and serve as a trusted advisor throughout the engineering organization. Key responsibilities Lead the vulnerability management program: set strategy, select tools, prioritize work, and track remediation for dependencies, containers, and cloud infrastructure. Develop and maintain a dependency security strategy, including policies for third-party library use and update schedules. Integrate and manage security tools within CI/CD pipelines, such as SAST, SCA, secrets detection, and container scanning. Act as a security consultant for product and engineering teams, supporting design reviews, architecture decisions, and secure coding practices. Define and maintain security standards and guidelines that are practical for development teams. Oversee and improve the Security Champions program to build security awareness and skills across engineering teams. Support SecOps with incident triage and response, providing security engineering expertise when needed.

Job Title: Senior Engineer I Location: London, Bristol, or Edinburgh (Including Hybrid) Salary: £60,000 - £82,500 Team: Developer Experience Reporting To: Head of Engineering Closing date: Friday 30th March 2026 This role is based in the UK and requires an existing right to work in the UK. At this time, we are unable to offer visa sponsorship for this role. We are committed to cultivating a diverse, global team and our sponsorship policy is assessed on a role-by-role basis. We encourage you to regularly visit our careers site for updates on future opportunities where we may offer visa sponsorship. Kaluza is at the forefront of the energy revolution, transforming complex energy challenges into streamlined solutions. We empower energy companies to navigate contemporary challenges while driving the transition to a sustainable, electrified future. Our platform orchestrates millions of real-time decisions across homes, devices, markets, and grids. By merging predictive algorithms with user-centric design, Kaluza ensures clean energy is reliable, affordable, and seamlessly integrated into daily life. With teams across Europe, North America, Asia, and Australia, alongside a joint venture with Mitsubishi Corporation in Japan, we support industry leaders such as OVO, AGL, and ENGIE, as well as innovators like Volvo and Volkswagen. What will I be doing? In this impactful role, you will be instrumental in architecting and enhancing our Internal AI Engineering Platform. You will construct the infrastructure, from Model Context Protocol (MCP) servers to shared workflows, enabling our software teams to accelerate their development while ensuring system reliability and security. Your contributions will significantly influence Kaluza’s efforts to minimize defects, enhance productivity, and establish a benchmark for AI-driven development. AI Tooling Orchestration: Spearhead the trials and implementation of advanced engineering tools, including Claude Code, Kiro, and Opencode, ensuring their seamless integration into the developer workflow. Infrastructure & Connectivity: Design and maintain our MCP (Model Context Protocol) registry, creating a secure and scalable process for approving and deploying new servers and tools. Shared Workflows: Develop and uphold shared services and standards that standardize coding practices and automate repetitive architectural tasks across teams to facilitate AI workflows. Spec-Driven Development: (additional responsibilities to be defined).

Join Vanta as a Senior Fullstack Software Engineer specializing in Privacy & Data Security. In this role, you'll leverage your extensive experience in software development to enhance our platform's privacy features while ensuring data integrity and security. You will collaborate closely with cross-functional teams to design, develop, and implement robust solutions that protect user data.

At Menlo Security, we are dedicated to empowering secure connections, communication, and collaboration across the globe. Our mission has become increasingly vital in the wake of COVID-19, as we serve a diverse clientele that includes Fortune 500 companies, 9 out of the 10 largest global banks, and the Department of Defense.As we evolve from 400 employees, we seek passionate and agile individuals who resonate with our mission. The ideal candidate is ethical, exceptionally organized, dedicated to completion, service-oriented, and open to feedback while confidently providing guidance to others.With robust financial backing from top-tier investors including Vista Equity Partners, General Catalyst, JPMC, American Express, HSBC, and Ericsson Ventures, Menlo Security is poised for significant growth.Role OverviewWe invite skilled engineers to join our Web Isolation team, focusing on our cutting-edge remote browser technology utilized on desktop and mobile platforms, catering to millions globally via Menlo's cloud services. Your work will encompass areas such as Chromium internals, networking, video/audio, advanced HTML5 features, containerization, load balancing, scaling, and cost-efficiency, all while maintaining a strong emphasis on security. Our team fosters a collegial environment with a robust culture of design and code review. We welcome applicants possessing deep systems-level expertise from non-browser domains to tackle innovative challenges. For a glimpse into our challenges, visit our blog: here.Candidate ProfileThe ideal candidate will possess a profound understanding of browsers and relevant technologies. You should have experience (or be willing to gain experience) in areas such as Chromium internals, networking, video/audio processing, and advanced HTML5 features including WebGL and WebRTC.

* 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.