Senior Software Security Engineer

🔒 Confidential Employer
Posted 28 April 2026
LOCATION
Edinburgh
TYPE
Full-time
LEVEL
Mid-Senior level
CATEGORY
Cyber Security
This employer holds a UK Home Office sponsor license — sponsorship for this specific role is at the employer’s discretion

SKILLS

Security Engineering Product Security Application Security Linux Docker Kubernetes Go TypeScript

FULL DESCRIPTION

Senior Software Security Engineer

Company: [Employer hidden — view at passion-project.co.uk] Solutions

Location: Edinburgh (Remote from UK)

Job Type: Full-time

Experience Level: Senior and Expert level

Category: Cyber Security, Telecommunications

Description: Communication software for public safety & enterprise. [Employer hidden] Solutions is a leading provider of communication and software solutions tailored for public safety and enterprise sectors. Its extensive portfolio includes mission-critical radios, command center software and video security systems designed to enhance operational efficiency and safety.

Who you are

  • 5+ years of experience in Security Engineering with a focus on product security and/or application security
  • Bachelor’s degree in Computer Science, Information Security, or a related technical field
  • In-depth knowledge of Linux and Docker container-based infrastructures, including their orchestration (e.g. Kubernetes)
  • Working knowledge of techniques, standards, and state-of-the-art authentication and authorization technologies, applied cryptography, security vulnerabilities and remediations
  • Significant software development experience. Experience in Go (our main backend language), Typescript/Javascript, C/C++, Python and Bash is desirable
  • Working knowledge of web-related protocols and technologies (HTTP, REST APIs, DOM, CSP), networking protocols (IP, TCP, UDP), and security protocols (TLS)
  • Experience in performing threat modeling, with a good grasp of common threat vectors and frameworks
  • Strong knowledge of security principles, best practices, and industry standards, such as NIST, ISO 27001, and CIS Critical Security Controls, OWASP ASVS and Testing Guides
  • Familiarity with industry-standard security frameworks such as OWASP and NIST
  • Experience with security tools such as SAST, DAST, IAST, and SCA
  • Exceptional analytical and investigative skills, with hands-on experience in root cause analysis
  • Knowledge of current and emerging threats and techniques for exploiting security vulnerabilities
  • Experience with CI/CD pipeline, security tools integration, and secure SDLC
  • Experience with cloud-based infrastructure (AWS, Azure, or Google Cloud), and on best practices on how to secure cloud environments
  • Master's degree or equivalent experience preferred
  • Security certifications are a plus, including OSCP, OSEE, SANS/GIAC, CCSP, and CISSP
  • Excellent verbal and written communication, with the ability to translate complex security concepts to technical and non-technical stakeholders
  • Demonstrated ability to design, document, and implement new security processes
  • Experience in a high-growth technology environment or SaaS business
  • Ability to remain calm under pressure, especially during incidents or audits

Desirable

  • Familiarity with security considerations for AI/ML systems is desirable
  • Understanding of distributed systems design, implementation and operation
  • Understanding of privacy threats and controls, including on how to adapt generic best practices to specific scenarios in the product by providing detailed specifications to stakeholders
  • Exploit development experience, and good understanding of the necessary conditions to trigger different vulnerability types, and the maximum impact achievable
  • Experience with enterprise log collection and analysis platforms (e.g., Splunk, OSQuery)

What the job involves

  • The Senior Software Security Engineer will be responsible for analysing software designs and implementations from a security perspective, identifying and proposing remediations to security issues throughout the software development lifecycle (SDLC)
  • Perform threat modelling, risk assessments, and architecture reviews to identify and mitigate risk
  • Support the engineering teams on definition on detailed security requirements to meet compliance requirements and industry best practices
  • Perform security code reviews looking for potential security vulnerabilities
  • Act as a subject matter expert to advise and answer questions from engineering and compliance teams on technical product security matters
  • Define and oversee the deployment of Software Composition Analysis (SCA) tools to compile SBOMs of software components, helping to identify known vulnerabilities and license compliance violations
  • Define and oversee the deployment of automated security testing tools into CI pipelines, including Static Application Security Testing (SAST), Dynamic Application Security Testing (DAST), and Secret Detection scanning tools
  • Manual penetration testing of web applications (backend and frontend).Manual penetration testing skills in the domains of cloud infrastructure, embedded/OS or mobile are desirable
  • Write custom scripts or unit test cases to check for vulnerabilities or broken/missing security controls
  • Recommend improvements to existing security scanning tools and processes, and propose new ones
  • Periodically triage the findings from the automated security scanning tools
  • Validate potential security vulnerabilities to determine whether they are actual true positives, or false positives (i.e. non-applicable) in the product context. Write proof of concept exploits when necessary to achieve this
  • Assess the risk of vulnerabilities and threats in order to help the business determine their remediation priority order
  • Communicate the identified security issues to engineering and compliance stakeholders, and manage them throughout the SDLC process to ensure they are properly addressed
  • Establish and maintain secure coding standards, baseline product security requirements and more general best practices to provide guidance to development teams
  • Assist the program area with implementing a secure Continuous Integration/Continuous Delivery (CI/CD) pipeline utilizing DevSecOps principles and practices to increase automation
  • Implement automated security controls as part of CI/CD pipelines
  • Support product security incident response processes, including root cause analysis (identify the affected product components, data, and the overall impact level) and definition of mitigation strategies
  • Define clear criteria and protocols for security incident response
  • Conduct post-incident analysis to compile lists of lessons learned, and measures to prevent similar incidents from reocurring, and refine response strategies
  • Monitor emerging security threats, vulnerabilities, and trends to proactively investigate, remediate, and integrate new protections
  • Ensure products comply with relevant security standards, certifications, and regulations (e.g., OWASP, NIST)
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