Network Security Architect

About Us:Established in 2022, Cyber Energia is dedicated to protecting critical renewable energy infrastructures from the ever-changing landscape of cyber threats. Our expertise lies in Operational Technology (OT) cybersecurity, providing cutting-edge solutions that guarantee operational resilience, regulatory compliance, and business continuity amidst the rapid digital transformation of the energy sector.At Cyber Energia, we aim to empower operators to effectively manage cyber risks while ensuring adherence to regulatory standards.Job Overview:We are on the lookout for an experienced Senior Network Cyber Security Engineer to join our Network Security Engineering team, with a focus on firewalls and routing technologies. In this hands-on position, you will spearhead the design, implementation, and enhancement of Check Point security platforms, safeguarding mission-critical renewable energy infrastructure both across Europe and globally.The ideal candidate will be a proactive, self-driven professional with a proven track record in enterprise firewall architecture, adept at multitasking, and thriving in a fast-paced, challenging environment.

About the Role We are seeking a skilled Network Engineer to strengthen our Network Security team. In this pivotal role, you will be instrumental in managing, scaling, and enhancing our network security infrastructure through hands-on operations, design, and implementation. The ideal candidate will possess robust networking expertise and experience with security appliances, such as firewalls and proxies. At Jane Street, our extensive distributed systems rely on an agile, dependable, multi-vendor network infrastructure that accommodates diverse traffic profiles ranging from trading to internet connectivity. Supporting such a comprehensive multi-functional network necessitates advanced monitoring and automation tools. Exceptional communication and interpersonal skills are essential as you will collaborate with colleagues worldwide. Your responsibilities will include identifying and resolving issues, planning and executing deployments, and optimizing systems. We are eager to utilize your advanced networking skills and security knowledge to: Collaborate closely with Network Engineering to design and deploy security perimeters and adjacent network infrastructure. Effectively manage and continually evolve network segmentation, DMZ, and other security aspects. Assess and conduct lab tests on new platforms for our network security infrastructure. Partner with Cybersecurity to detect and mitigate network threats and vulnerabilities. Engage with application owners and traders to enable secure business workflows. Proactively enhance support by improving network infrastructure observability, scripting, and communicating requirements to our software engineers. Refine our network security processes and documentation. A holistic approach to system design is vital for this position. The Networking department emphasizes flexibility, compatibility, and efficiency in crafting solutions while actively seeking ongoing input from users across the firm. Our organizational culture values intellectual humility, openness, and continuous improvement, which is reflected in our team's daily endeavors. We are all partners working towards common goals and are consistently on the lookout for innovative ideas to enhance our work. Your strong communication abilities and analytical skills will be crucial as we support our colleagues' daily activities and ensure our systems function at the highest standard.

Location: Hammersmith, London Department: ITAssala Energy is a forward-thinking Oil and Gas Exploration and Production company dedicated to the sustainable development of its valuable assets in Gabon. We embrace a collaborative culture, champion diversity, and prioritize safety and integrity in every aspect of our operations.We are seeking a Senior Network Engineer to become a vital member of our IT team, responsible for maintaining and enhancing our global network infrastructure. In this role, you will ensure network stability, security, and efficiency across our operations while spearheading improvements and innovative solutions.

Verifone is looking for a Senior Network Engineer to help shape and support network infrastructure for payment systems. This position focuses on designing, implementing, and maintaining secure network solutions that keep payment platforms connected and protected. Key responsibilities Design and build network solutions tailored for payment systems Maintain and improve network connectivity and security across various platforms Work closely with teams from different functional areas to support business needs Collaboration This role involves regular interaction with colleagues from multiple departments, ensuring network solutions align with broader organizational goals. Locations Ashford, England, United Kingdom London, England, United Kingdom Warszawa, Masovian Voivodeship, Poland

Join us at Wehrtyou as a Senior WAN Network Engineer, where you will be pivotal in designing, implementing, and maintaining our wide area network infrastructure. Your expertise will help ensure seamless connectivity and optimal performance for our global operations. This role offers the opportunity to work with cutting-edge technologies and collaborate with a talented team dedicated to innovation.

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

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.

About Anaplan Anaplan builds an AI-powered scenario planning and analytics platform that helps organizations make sharper business decisions. Over 2,400 global companies, including names like Coca-Cola, LinkedIn, Adobe, LVMH, and Bayer, rely on Anaplan to stay competitive and navigate changing markets. The team values diverse perspectives, sets ambitious goals, and celebrates progress of all sizes. Anaplan’s culture emphasizes customer success, leadership at every level, and disciplined execution. Employees find opportunities for growth, connection, and recognition. Role Overview: Senior Product Security Engineer Location: London, United Kingdom This role focuses on strengthening security across Anaplan’s products and operations. The Senior Product Security Engineer leads initiatives to reduce risk, partners with teams across the company, and helps shape the security strategy. Main Responsibilities Design, lead, and implement security programs that address key risks and deliver on security goals. Translate findings from security assessments into practical projects that improve security at scale. Work with both technical and non-technical teams to embed security controls and encourage secure practices throughout the company. Define and track metrics to show the impact and effectiveness of security programs. Manage stakeholder expectations, using problem-solving and negotiation skills to build trust across teams. Support innovation and proof-of-concept work within the security function, helping teams focus on the right priorities. Collaborate with cross-functional groups to advance security objectives. Partner with the CISO to prepare executive reports, status updates, and company-wide communications, ensuring visibility into important security milestones and risks.

About the Position Join Jane Street as a Senior Network Engineer, where you will play a pivotal role in enhancing our network infrastructure to accommodate growing business demands. Your expertise will help drive automation and explore innovative AI solutions to optimize our operations. At Jane Street, we operate a multi-vendor, highly available network infrastructure that supports diverse traffic profiles, from high-speed trading to standard internet connectivity. A typical day on the Network Engineering team includes: Collaborating on new data centre and colocation initiatives, optimizing WAN routing, and engaging in cross-team design projects. Interfacing with stakeholders to identify business needs and develop cutting-edge network features and capabilities. Leading reactive support tasks while also initiating proactive infrastructure enhancements, ensuring detailed documentation to minimize outages and improve troubleshooting efficiency. Exploring AI and machine learning enhancements to streamline operations and continuously elevate service quality. Utilizing your networking expertise to scale our infrastructure while maintaining exceptional standards for performance and reliability. Documenting solutions and processes meticulously to enhance team efficiency. If you are passionate about innovation in a complex network ecosystem, excel at building scalable systems and documentation structures, and are curious about the applications of AI in network operations, this role offers a significant opportunity to impact Jane Street. We are excited to learn from your expertise and unique insights.

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.

CoreWeave is The Essential Cloud for AI™. Engineered by innovators for innovators, our platform equips leading AI labs, startups, and enterprises with the cutting-edge technology and expert teams needed to scale AI solutions confidently. Since our inception in 2017 and our public listing on Nasdaq (CRWV) in March 2025, we've been at the forefront of AI infrastructure, facilitating breakthroughs by transforming compute into capability. Discover more at www.coreweave.com. We proudly uphold our status as a Living Wage accredited Employer. Your RoleWe are looking for a skilled and experienced Senior Engineer for Network Observability to enhance our Network Observability team. In this pivotal role, you will shape the design, development, and maintenance of monitoring, telemetry, and observability systems that ensure the reliable operation and scalability of CoreWeave’s GPU cloud network. Your focus will be on crafting solutions that deliver real-time insights into network performance, enabling proactive issue detection and swift resolution.Your mission is to enrich CoreWeave’s network with advanced observability features: comprehensive metrics, insightful analytics, and automated alerting—ensuring that any anomalies are identified before they impact our customers.Design, optimize, and maintain network observability platforms. Leverage your expertise in Python and Golang to create and automate collectors, exporters, and dashboards that provide in-depth visibility into network health and performance.Partner with Network Engineering and Platform teams to aggregate and unify logs, metrics, and events from diverse platforms (Arista EOS, NVIDIA Cumulus Linux, Nokia SR OS, SR Linux, etc.) into a cohesive observability pipeline.Architect and implement scalable telemetry solutions utilizing protocols such as gNMI, SNMP, and streaming analytics. Ensure sophisticated alerting and anomaly detection frameworks with tools like Prometheus, Grafana, and Alertmanager.Collaborate closely with network developers, site reliability engineers, and security teams to integrate observability solutions throughout the wider infrastructure. Engage in design discussions, RFCs, and architectural decisions.

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.

About Anaplan Anaplan builds an AI-powered scenario planning and analysis platform that helps businesses make confident decisions and stay ahead in the market. Our customers include Fortune 50 leaders such as Coca-Cola, LinkedIn, Adobe, LVMH, and Bayer. We value innovation, customer success, and collaboration. Our teams work globally, celebrating diversity and leadership at every level. At Anaplan, people set ambitious goals and take pride in both individual and shared achievements. Role Overview: Senior Product Security Engineer Location: London, United Kingdom The Senior Product Security Engineer will help shape and strengthen Anaplan’s security programs. This role focuses on designing, implementing, and measuring security initiatives that protect our platform and support our business goals. What You Will Do Design and implement security programs to reduce risk and meet key security objectives. Turn findings from security assessments into actionable initiatives and scalable programs. Work with both technical and non-technical teams to integrate security controls and encourage secure practices throughout the company. Set and track metrics to measure the effectiveness and impact of security efforts. Manage expectations and build trust with stakeholders at all levels, using strong problem-solving and negotiation skills. Improve the security innovation and proof-of-concept process, helping teams focus on the most important challenges. Coordinate with cross-functional teams to advance security goals. Collaborate with the CISO to prepare executive reports, provide status updates, and highlight progress on critical security milestones and risks.

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.

AJ Bell seeks a Senior Information Security Engineer to strengthen the protection of company information systems and support compliance initiatives. The position is offered as a hybrid role, with the option to work from either the Manchester or London office and some flexibility for remote work. Key responsibilities Identify and assess security vulnerabilities within company systems Implement and maintain security controls to protect data and infrastructure Collaborate with teams across the business to promote effective security practices Assist in maintaining compliance with relevant regulations and internal policies Location This role is based in Manchester or London with a hybrid work arrangement, allowing for both office presence and remote work.

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.