Senior Software Engineer

Ronald James Group; United Kingdom; Remote; GBP 90,000 - 110,000; Full time

Job summary

Ronald James Group is seeking a hands-on Senior Security Engineer to strengthen security across AWS infrastructure, applications and the wider engineering environment. The role emphasizes development background, cloud security, and secure coding practices within a modern AWS stack.

You’ll collaborate with development and infrastructure teams to identify vulnerabilities, implement fixes, and elevate security standards across the organization’s engineering function.

Qualifications

• Hands-on experience with AWS security, IAM and cloud infrastructure.
• Strong knowledge of application security and vulnerability management.
• Familiarity with Terraform, CloudFormation or similar IaC tools.
• Knowledge of CI/CD security and secure development practices.
• Experience investigating security threats and incident response.

Responsibilities

• Identify and remediate vulnerabilities across applications, APIs and backend services.
• Strengthen AWS security including IAM, networking, ECS, Lambda and permissions.
• Review and improve infrastructure security with Terraform and CloudFormation.
• Improve application security across authentication, authorization and API protection.
• Manage security tooling, monitoring and vulnerability remediation.

Skills

AWS security

Cloud security

Vulnerability management

Secure coding practices

Incident response

CI/CD security

IAM and permissions

Tools

Terraform

CloudFormation

CI/CD tooling

Job description

Senior Security Engineer – AWS & Application Security

Up to 100k - Fully remote within the UK

No Sponsorship will be provided for this role.

We’re looking for a hands-on Senior Security Engineer to strengthen the security of our applications, AWS infrastructure and wider engineering environment.

This role would suit someone with a strong software development background and experience securing cloud environments, particularly AWS. You’ll work closely with development and infrastructure teams to identify vulnerabilities, implement fixes and improve security practices across the engineering function.

What You’ll Be Doing

• Identifying and resolving vulnerabilities across applications, APIs and backend services.
• Strengthening AWS security, including IAM, networking, ECS, Lambda and permissions.
• Reviewing and improving infrastructure security using Terraform and CloudFormation.
• Improving application security across authentication, authorisation and API protection.
• Managing security tooling, monitoring and vulnerability remediation.
• Introducing security testing and automated checks into CI/CD pipelines.
• Working alongside developers to promote secure coding practices.

What We’re Looking For

• Hands-on experience with AWS security, particularly IAM and cloud infrastructure.
• Strong understanding of application security and vulnerability management.
• Experience with Terraform, CloudFormation or similar Infrastructure as Code tools.
• Knowledge of CI/CD security, automated testing and secure development practices.
• Experience investigating security threats and responding to incidents.

Technical Environment

• Frontend: React and React Native.
• Cloud: AWS (ECS, Lambda, SQS, SNS).
• Infrastructure: Terraform and CloudFormation.
• Data: MongoDB and Snowflake.
• Security: AWS IAM, Wiz and application security tooling.

The Opportunity

An opportunity for a technically strong engineer to take ownership of security across a modern AWS environment. You’ll combine your development experience with cloud and application security, helping shape engineering standards and deliver practical improvements to the organisation’s overall security posture.