Senior Simulation Software & Security Engineer in Crawley

At the company, we innovate and collaborate to make the world a better place. We’re committed to fostering an environment for every teammate that’s welcoming, respectful and inclusive, with great opportunity for professional growth. Find your future with us.

The company Global Services SW Engineering provides aerospace industry leadership in custom software development, engineering and technical services, and a range of other services to support training centres. Join the Commercial Simulation Binary team as a Senior Simulation Software & Security Engineer part of the SW Engineering team supporting Training Solutions. In this role, you will also help define, implement, and harden the security architecture for a complex iOS application built with Unreal Engine and extensive proprietary native C++ libraries.

Position Responsibilities

• Own, extend, and maintain a large native C++ codebase: design, implement, review, and ship high-quality, cross-platform code for Windows, Linux, and iOS.
• Deliver across the full development lifecycle: feature development, bug fixes, refactors, performance tuning, and ongoing maintenance.
• Build, improve, and troubleshoot automated build systems and CI/CD pipelines to increase reliability, reduce build times, and ensure reproducible cross-platform builds.
• Develop and maintain cross-platform tooling for code generation, packaging, signing, deployment, and release automation in partnership with DevOps.
• Design and implement security architecture and runtime protections for a complex iOS application with native C++ components, including integrity checks, jailbreak/anti-debug detection, and tamper response.
• Protect proprietary C++ libraries and sensitive data from reverse engineering and unauthorized extraction using hardening, obfuscation, and other protection techniques.
• Define secure interfaces between Unreal Engine and native libraries, apply least-privilege and robust input validation, and implement secure handling of downloaded/runtime-accessed content.
• Evaluate and select security-related libraries, frameworks, and third-party protection tools; partner with teams to harden build, signing, and release pipelines and ensure secure cloud authentication/token handling.
• Implement and manage security logging, telemetry, and data controls for adversarial detection, and perform security validation activities including static/dynamic analysis, fuzzing, and reverse-engineering assessments.
• Collaborate cross-functionally with product, QA, and engineering teams, mentor junior engineers, and advocate engineering best practices to balance security, performance, maintainability, and user experience.

Basic Qualifications (Required Skills/Experience)

• Bachelor of Science degree or higher from an accredited course of study in engineering, engineering technology, chemistry, physics, mathematics, data science, or computer science.
• Very strong proficiency in modern C/C++ and low-level programming skills, ability to write clear, maintainable, and efficient code.
• Experience developing iOS application security architecture.
• Experience with secure cryptography usage and key management.
• Experience with secure storage on iOS.

Preferred Qualifications (Desired Skills/Experience)

• 7+ years of applicable experience.
• iOS/macOS development experience.
• Knowledge of packaging and deployment for mobile platforms (IPA creation, code signing).
• Experience with unit testing frameworks and test automation.
• Knowledge of native application security for desktop and mobile applications.
• Knowledge of build caching and distributed build systems.
• Background in performance optimization, memory management, and multithreaded programming.
• Proven experience working directly in and modifying a large, existing code base.
• Proven experience handling multiple tool chains for cross-platform development.
• Hands‑on experience with automated build and CI systems.
• Strong debugging skills with experience using debuggers and profiling tools.
• Familiarity with source control workflows and branching strategies.
• Excellent communication skills and ability to work effectively on a cross-functional team.
• Experience with software cracking for security improvement, including runtime integrity and memory control strategies.
• Experience with jailbreaking and permissionless debugger attachment.
• Experience with reverse engineering.
• Experience developing secure cloud authentication and token handling.
• Experience with security-focused static analysis, dynamic analysis, fuzzing, and adversarial validation.

Benefits

• Competitive salary and annual incentive plans.
• Continuous learning - you’ll develop the approach and skills to navigate whatever comes next.
• Success as defined by you - we’ll provide the tools and flexibility, so you can make a meaningful impact, your way.
• Inclusive culture - you’ll be embraced for who you are and empowered to use your voice to help others find theirs.
• Excellent Adoption and Parental leave options.
• 23 days plus UK public holidays and a Winter Break between Christmas and New Year.
• Pension Plan with up to 10% employer contribution.
• Company paid BUPA Medical Plan.
• Short Term Sickness: 100% pay for the first 26 weeks.
• Long Term Sickness: 66.67% of annual salary from 27th week.
• 6x annual salary life insurance.
• Learning Together Programme to support your ongoing personal and career development.
• Access to the company’s Well Being Programs, tools and incentives.

Conflict of Interest

Successful candidates for this job must satisfy the Company’s Conflict of Interest (COI) assessment process. Applications for this position will be accepted until Jul. 31, 2026.

Export Control Requirements

This is not an Export Control position.

Education

Bachelor's Degree or Equivalent Required.

Relocation

Relocation assistance is not a negotiable benefit for this position.

Visa Sponsorship

Employer will not sponsor applicants for employment visa status.

Shift

Not a Shift Worker (United Kingdom).

Equal Opportunity Employer

We are an equal opportunity employer. We do not accept unlawful discrimination in our recruitment or employment practices on any grounds including but not limited to; race, color, ethnicity, religion, national origin, gender, sexual orientation, gender identity, age, physical or mental disability, genetic factors, military and veteran status, or other characteristics covered by applicable law. We have teams in more than 65 countries, and each person plays a role in helping us become one of the world’s most innovative, diverse and inclusive companies. We are a Disability Confident Committed employer and welcome applications from candidates with disabilities. Applicants are encouraged to share with our recruitment team any accommodations required during the recruitment process. Accommodations may include but are not limited to: conducting interviews in accessible locations that accommodate mobility needs, encouraging candidates to bring and use any existing assistive technology such as screen readers and offering flexible interview formats such as virtual or phone interviews.