Security Engineer

Selby Jennings; City Of London; On-site; GBP 90,000 - 130,000; Full time

Job summary

Selby Jennings is seeking an experienced Security Engineer to design and build security foundations for a rapidly growing, technology-driven investment firm. You will own security architecture across cloud, on‑premises and modern infrastructure, and shape the security landscape as the firm scales.

You will partner with engineering and operations to embed security throughout the software development lifecycle, influence architectural decisions, and drive incident response readiness.

Qualifications

• 5+ years in Security Engineering or related field.
• Experience with security monitoring, incident response, threat detection or SIEM.
• Background in software engineering, sysadmin, or infra engineering.
• Ability to design scalable security solutions.
• Strong analytical and problem-solving skills.
• Excellent communication and stakeholder management.
• Bachelor's degree in CS/Engineering or related field.
• Experience securing cloud environments (AWS/Azure/GCP).
• Familiarity with cloud-native security tooling and modern infra security practices.
• Exposure to regulated environments in financial services.

Responsibilities

• Design, implement and maintain security controls across applications, infrastructure and cloud.
• Own and enhance detection and response capabilities including monitoring and defensive tooling.
• Support authentication, authorization and internal certificate management architectures.
• Define and implement security standards, policies and best practices.
• Partner with Engineering and Operations to integrate security in SDLC.
• Evaluate threats and technologies to support future growth.
• Contribute to incident response processes and security engineering initiatives.

Skills

Security engineering

Threat detection

Incident response

Cloud security

Identity & access mgmt

Security architecture

SIEM

Security monitoring

Communication

Education

Bachelor's degree in CS/Engineering

Tools

AWS

Azure

GCP

SIEM

IAM tools

Job description

Our client is a rapidly growing, technology-driven investment firm that combines sophisticated investment strategies with a strong engineering culture. As they continue to scale, they are making significant investments across infrastructure, security, and technology, creating a unique opportunity for an experienced Security Engineer to help shape the future security landscape of the organisation. The firm offers a highly collaborative environment where technology is viewed as a key competitive advantage and engineers are empowered to make meaningful contributions from day one.

You will play a pivotal role in designing and building the security foundations that protect the firm's technology, data, and operations. This is a greenfield opportunity, offering significant ownership across security architecture, detection and response, identity and access management, cloud security, and infrastructure protection. The candidate will partner closely with engineering and operations teams, influence key architectural decisions, and help establish a scalable security framework capable of supporting the firm's continued growth.

Key Responsibilities

• Design, implement, and maintain security controls across applications, infrastructure, and cloud environments.
• Own and enhance security detection and response capabilities, including monitoring, alerting, honeypots, and defensive tooling.
• Support the development of authentication, authorisation, and internal certificate management architectures.
• Define and implement security standards, policies, and best practices aligned with business and regulatory requirements.
• Partner closely with Engineering and Operations teams to integrate security throughout the software development lifecycle.
• Evaluate emerging threats and security technologies, making architectural decisions that support the firm's future growth.
• Contribute to incident response processes and broader security engineering initiatives.

Required Experience

• 5+ years of experience within Security Engineering, Information Security, or a related discipline.
• Strong understanding of security monitoring, incident response, threat detection, or SIEM technologies.
• Previous experience in software engineering, systems administration, infrastructure engineering, or operating systems development.
• Demonstrated ability to design and deliver scalable security solutions.
• Strong analytical and problem-solving capabilities.
• Excellent communication and stakeholder management skills.
• Bachelor's degree in Computer Science, Engineering, or a related field.
• Experience securing cloud environments across AWS, Azure, or GCP.
• Understanding of cloud-native security tooling and modern infrastructure security practices.
• Exposure to financial services or regulated environments.
• Familiarity with identity, authentication, and access management concepts.