Senior Staff Information Security Engineer

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NMI

WebsiteLinkedInAll Job Openings

201 - 500 employees

💼 Consulting

📦 Logistics

📣 Marketing

Consulting • Logistics • Marketing

NMI is a leading global embedded payments enablement platform that provides a comprehensive, all-in-one solution for accepting and managing payments. Their platform is designed to support a variety of payment methods, including online, in-person, mobile, and self-service transactions. NMI offers flexible and feature-rich payment gateways, merchant relationship management solutions, and fraud defense tools. Serving independent sales organizations, banks, software developers, and payment facilitators, NMI helps its partners grow by simplifying the complexities of payment processing and offering a scalable and unified payments experience. With over 20 years of experience, NMI connects over 237,000 devices and processes over $200 billion in payment volumes annually. Their innovative approach and focus on flexibility and modularity make them a strategic partner in the evolving fintech landscape.

📋 Description

• Define and evolve security architecture across AWS and our colocation estate. • Establish secure reference architectures, engineering standards, and reusable control patterns. • Provide technical leadership for major infrastructure, platform, and product initiatives. • Identify systemic risks and lead practical, sustainable programmes to address them. • Design and improve security across cloud accounts, networks, identities, workloads, and shared services. • Establish effective controls for identity and access management, segmentation, encryption, secrets, logging, monitoring, and workload protection. • Develop preventative guardrails through infrastructure-as-code, policy-as-code, automation, and cloud-native security services. • Improve consistency across the enterprise including cloud, on-premises infrastructure, and the connectivity between them. • Engage early in the design of new products, platforms, services, and integrations. • Lead threat modelling, security architecture reviews, and technical risk assessments. • Translate security risks into clear, practical engineering recommendations. • Help teams adopt secure-by-design principles through reusable patterns, tooling, and documentation. • Design and implement security tooling, integrations, and automated controls. • Embed security capabilities into infrastructure provisioning, engineering workflows, and CI/CD pipelines. • Use AI-assisted tooling to improve scripting, detection development, alert analysis, vulnerability triage, threat modelling, and technical documentation. • Validate AI-generated outputs and ensure AI tools are used with appropriate controls for confidentiality, accuracy, access, and human oversight. • Provide technical direction for vulnerability and exposure management across AWS and on-premises infrastructure. • Identify recurring patterns across incidents, penetration tests, vulnerabilities, and control assessments. • Act as a senior technical escalation point during significant security incidents. • Ensure investigations and lessons learned result in durable architectural and engineering improvements. • Lead complex security initiatives spanning multiple teams and planning cycles. • Mentor security engineers and provide guidance to engineers in adjacent teams. • Raise the standard of security architecture, automation, documentation, and technical decision-making. • Communicate security risks and recommendations clearly to technical teams, product leaders, and senior stakeholders.

🎯 Requirements

• Significant experience in security engineering, infrastructure security, cloud security, security architecture, or platform engineering. • Deep, hands-on experience securing AWS environments. • Strong knowledge of AWS identity and access management, network architecture, account governance, encryption, logging, monitoring, secrets management, and workload protection. • Experience designing or securing on-premises, data-centre, or colocation-hosted infrastructure. • Strong knowledge of enterprise networking, segmentation, firewalls, secure remote access, privileged administration, and hybrid connectivity. • Experience with infrastructure-as-code, CI/CD security, containerised environments, and cloud-native platforms. • Demonstrated experience designing and implementing automated security controls and engineering solutions. • Proficiency with scripting or software development using Python, Go, or a comparable language. • Practical experience using AI-assisted tooling to improve security engineering and operational workflows. • Experience leading complex initiatives across multiple engineering, infrastructure, or product teams. • Strong knowledge of security architecture, threat modelling, vulnerability management, detection, and incident response. • The ability to operate independently, navigate ambiguity, and influence decisions across technical and leadership audiences.

🏖️ Benefits

• Annual bonus scheme dependent on individual and company performance • Annual salary of £90,000 - £130,000 depending on experience • 25 days holiday each year (+ bank holidays + 1 day after each year of service with up to a max. of 30 days) • Workplace pension scheme • Private medical insurance (upon 30 days of employment) • 7 hours per day, 35 hours per week • A remote first culture • Great work-life balance with our Flexi-time policy • Family Friendly policies (Enhanced Maternity and Paternity Pay and Shared Parental Leave). • A chance to develop with an allocated company training budget • Bike2Work Scheme • Lifeworks, an Employee Assistance Programme which offers wellbeing, family and financial support services, such as assessments, resources and even 1:1 counselling sessions. It also offers interesting perks such as discounts on gyms, restaurants, high street retailers and cinema tickets • A strong commitment to employee wellbeing including mental health first aiders • Employee referral scheme with generous financial reward • Bonusly colleague reward scheme