4 of 4 Permanent Principal Security Engineer Jobs in London

with existing regulations. From fintechs to large banks to e-commerce sites, our client gives financial institutions and businesses the freedom to own and transfer crypto on battle-designed security infrastructure. Their API is designed to offer a best-in-class developer experience allowing any platform to deploy custodial wallets in a matter of days, with streamlined feature delivery … and frequent security upgrades. Founded in 2020 in Paris, our client is incubated at Station F (awarded Future 40), accelerated by Techstars and recognized DeepTech by the French Ministry of Economy. Our company is fully remote with offices in Paris, Amsterdam, New York, London, Stockholm, Sofia, and other cities. Job Description You will contribute to one of the most … custody infrastructure for the trillion-dollar digital asset industry. You will join an amazing team of leaders (CTO, VP of Research, CISO) and experts (Software Engineers, R&D Engineers, Security Engineers) in a highly challenging and collaborative environment. We are looking for a Principal Security Engineer to run security operations within our company. You will More ❯

Principal Security Engineer – Cloud Platform (Remote, UK) We've partnered exclusively with a scaling infrastructure company that's fundamentally transforming how digital and physical components interact in the age of AI. Their core mission is to empower teams to build and deploy sophisticated systems by providing scalable, secure, and robust infrastructure solutions for development, deployment, and scaling. … They're looking for a Principal Security Engineer to lead the architecture and development of its next-generation cloud security platform. This is a high-impact, hands-on role where you’ll design and build a full Identity & Access Management (IAM) platform from scratch—powering secure access, identity federation, and zero-trust controls for large-scale … AI systems. You’ll shape the security foundation of a cutting-edge cloud platform, working across core backend services and collaborating with infrastructure and ML teams. Expect huge technical ownership, complex distributed problems, and the chance to influence engineering standards across the organisation. Requirements: Strong backend engineering skills (preferably Golang ) in cloud-native environments. Deep expertise in IAM protocols More ❯

Principle IT Security Engineer – Windows, Automation, Endpoint Security London – Hybrid Industry Leading Compensation Quant Capital is partnered with a leading trading firm looking to hire an IT Security Engineer to strengthen their global security posture. This role sits inside a high-performing engineering group and suits someone who can own technical decisions, cut through … noise, and build security controls that scale. You’ll work across Windows engineering, endpoint security, automation, vulnerability management and platform hardening. Expect a mix of hands-on engineering, advisory work, and proactive threat mitigation. The environment is fast-moving and technically demanding — you’ll be the person the wider IT team turns to for sound judgement and clarity. … What you’ll be doing Designing and implementing security controls across Windows platforms Driving vulnerability management initiatives and closing out remediation at scale Building automation around configuration, monitoring, and incident response Improving endpoint security: EDR, AV, patching, OS hardening Working with core infrastructure (AD/Entra ID, PKI, networking) Investigating emerging threats and advising on technical risk Supporting More ❯

Principle IT Security Engineer – Windows, Automation, Endpoint Security London – Hybrid Industry Leading Compensation Quant Capital is partnered with a leading trading firm looking to hire an IT Security Engineer to strengthen their global security posture. This role sits inside a high-performing engineering group and suits someone who can own technical decisions, cut through … noise, and build security controls that scale. You’ll work across Windows engineering, endpoint security, automation, vulnerability management and platform hardening. Expect a mix of hands-on engineering, advisory work, and proactive threat mitigation. The environment is fast-moving and technically demanding — you’ll be the person the wider IT team turns to for sound judgement and clarity. … What you’ll be doing Designing and implementing security controls across Windows platforms Driving vulnerability management initiatives and closing out remediation at scale Building automation around configuration, monitoring, and incident response Improving endpoint security: EDR, AV, patching, OS hardening Working with core infrastructure (AD/Entra ID, PKI, networking) Investigating emerging threats and advising on technical risk Supporting More ❯