Software Security Engineer

Fynity; Bristol; Hybrid; GBP 60,000 - 74,000; Full time

Job summary

A defense technology company in Bristol is looking for a Software Security Engineer to oversee the security of advanced software systems. You will guide security decisions, conduct assessments, and support both embedded and traditional software projects. The ideal candidate will have a strong background in software security, ideally within regulated sectors such as defense or aerospace. The role offers a base salary of up to £74,000, bonus potential, and supports hybrid working arrangements.

Benefits

Base salary up to £74,000

Bonus up to 21%

Pension up to 14% contribution

Flexible working

Enhanced parental leave

On-site facilities like subsidised meals and parking

Qualifications

• Experience working on complex defense-related software products.
• Strong background in software security and industry standards.
• Ability to balance security with engineering delivery.

Responsibilities

• Act as the security authority across multiple defense products.
• Guide security decisions throughout the software lifecycle.
• Conduct security assessments and risk analysis.
• Produce security documentation and reports.

Skills

Software security knowledge

Risk analysis

Security architecture advice

Hands-on security expertise

Education

Degree in a STEM discipline

Job description

Software Security Engineer

Defence Software Products

Would you like to work at the sharp end of defence technology, helping secure some of the most advanced software-enabled systems in the world?

The Software Security Engineer sits right at the heart of a defence-focused product portfolio. You'll act as the Software security engineer, working across multiple programmes at once, shaping how security is designed, built and assured across a wide range of Software including embedded and non-embedded software.

You will be influencing real Software engineering decisions across the full product lifecycle from early concept through to in-service support.

Key Responsibilities

• Act as the security authority across a range of defence products
• Guide security decisions throughout the entire software lifecycle
• Provide hands‑on security expertise to software and wider engineering teams
• Advise on secure architectures, design patterns, coding standards and trade‑offs
• Support both embedded software/firmware and more traditional software stacks
• Run security assessments and risk analysis, identify threats and define mitigations
• Support multiple projects in parallel in a fast‑moving, classified environment
• Produce clear, usable security documentation, reports and metrics

Qualifications

To secure this Software Security engineer role you will have:

• Experience working on complex software products in defence, aerospace, automotive, telecoms or similar regulated sectors
• Strong background in software security, with knowledge of recognised security standards and best practice
• Able to balance security risk with real‑world engineering delivery
• Interest in emerging technologies and the evolving security threat landscape
• Embedded software or firmware experience is a bonus, not a must
• Degree (or equivalent experience) in a STEM discipline

Benefits

• Base salary of up to £74,000 with a Bonus upto 21%
• Pension: Up to 14% total contribution
• Hybrid working: Typically 3-5 days onsite (driven by workload classification)
• Flexible working supported
• Enhanced parental leave
• Excellent on-site facilities (subsidised meals, parking, etc.)
• Security clearance required; willing and able to go through Security Clearance and progress to DV

If you're a security-minded Software engineer who wants real influence over how defence software is built and protected, this is a genuinely interesting role.

If you are interested please apply ASAP.