Senior Security Engineer

Ronald James Group; United Kingdom; Remote; GBP 85,000 - 115,000; Full time

Job summary

Ronald James Group is seeking a hands-on Senior Security Engineer to strengthen application security, AWS infrastructure and engineering practices for a platform used by millions. You’ll own vulnerability identification, fixes and security improvements across services and data stores in a fully remote UK setting.

The role emphasizes securing AWS resources, implementing security controls via Terraform/CloudFormation, and leveraging Wiz and AI tools to accelerate testing and remediation.

Qualifications

• Hands-on security engineering experience.
• Experience securing AWS environments and IAM, ECS, Lambda.
• Understanding of authentication, authorization, API security and vulnerabilities.

Responsibilities

• Identify, investigate and remediate vulnerabilities across applications, APIs and dependencies.
• Secure AWS infrastructure, including IAM, ECS, Lambda, messaging and secrets management.
• Manage and optimise Wiz for security monitoring, alerting and remediation.
• Improve threat detection, investigate alerts and support incident response.
• Implement security controls using Terraform, CloudFormation and CI/CD pipelines.
• Review database security across MongoDB and Snowflake.
• Use AI tools to accelerate security testing, investigation and remediation.
• Proven application security and vulnerability remediation experience.

Skills

Vulnerability remediation

Application security

Threat detection

Incident response

Security monitoring

CI/CD security

AWS security

AI tools usage

Python scripting

Security tooling development

Tools

Terraform

CloudFormation

Wiz

AWS

React

React Native

MongoDB

Snowflake

Python

Job description

Senior Security Engineer - Fully Remote in the UK

We’re looking for a hands-on Senior Security Engineer to strengthen application security, AWS infrastructure and engineering practices. You’ll take ownership of identifying vulnerabilities, implementing fixes and improving security across a platform used by millions.

Key Responsibilities

• Identify, investigate and remediate vulnerabilities across applications, APIs and dependencies.
• Secure AWS infrastructure, including IAM, ECS, Lambda, messaging and secrets management.
• Manage and optimise Wiz for security monitoring, alerting and remediation.
• Improve threat detection, investigate alerts and support incident response.
• Implement security controls using Terraform, CloudFormation and CI/CD pipelines.
• Review database security across MongoDB and Snowflake.
• Use AI tools to accelerate security testing, investigation and remediation.
• Proven application security and vulnerability remediation experience.
• Hands-on AWS security experience.
• Experience with Terraform and/or CloudFormation.
• Knowledge of authentication, authorisation, API security and common vulnerabilities.
• Experience with threat detection and incident response.
• Ability to use AI tools effectively while independently validating results.
• Experience with Wiz.
• React and React Native security.
• MongoDB, Snowflake and event-driven system security.
• Python and security tooling development.