Overview

Platform Security Engineer – Contract Role

Location: London

Hybrid Working: 3 days per week in the office

Start Date: ASAP

We are hiring a Platform Security Engineer to join a cutting-edge financial technology firm. This is a fantastic opportunity to work on securing high-performance trading infrastructure, cloud platforms, and business-critical applications in a fast-paced, high-stakes environment.

Key Responsibilities

• Implement and maintain security controls across Windows, Linux, and hybrid cloud environments (AWS, Azure, Alibaba Cloud).
• Collaborate with engineering teams to embed security into product design and development.
• Drive secure software development practices across Python, C++, Rust, Go, and Kotlin/Java.
• Conduct threat modelling, vulnerability assessments, and security code reviews.
• Mentor developers and engineers on secure coding and architecture.
• Integrate security scanning tools (SAST, DAST) into CI/CD pipelines.
• Perform vendor security reviews and third-party risk assessments.
• Proactively identify and mitigate security risks in a high-stakes trading environment.
• Experience with Crypto, DeFi, or Smart Contracts is a strong advantage.

Candidate Requirements

• 7+ years of experience in product or platform security roles.
• Strong background in secure coding and software development.
• Deep understanding of security principles across cloud platforms and operating systems.
• Experience with threat modelling, risk mitigation, and CI/CD security integration.
• Excellent communication, leadership, and problem-solving skills.
• Exposure to low-latency financial systems is a plus.

Seniority level

• Mid-Senior level

Employment type

• Contract

Job function

• Engineering and Quality Assurance

Industries

• Financial Services, IT System Data Services, and Security and Investigations