13 senior security architect jobs found

Security Architect – DV Cleared – Defence contract role Location: Preston – onsite three days per week, two days per week remote Day rate: £750 - £800 per day Outside IR35 Initial contract: Four months, likely to extend for at least a further 12 months You will only be considered for this contract role if you hold a current DV clearance, this is essential to the nature of the work you will undertaking. NexGen Associates is recruiting for an experienced Senior Security Architect to support a highly sensitive technology programme within a secure environment on a contract basis. The successful contractor will provide security architecture expertise across complex, business-critical systems involving multiple technologies, suppliers and delivery teams. You will help shape the programme’s security direction, ensuring that risks and protection requirements are properly considered throughout the design and implementation process. Due to the sensitive nature of the work,...

Security Architect – DV Cleared – Defence contract role Location: Preston – onsite three days per week, two days per week remote Day rate: £750 - £800 per day Outside IR35 Initial contract: Four months, likely to extend for at least a further 12 months You will only be considered for this contract role if you hold a current DV clearance, this is essential to the nature of the work you will undertaking. NexGen Associates is recruiting for an experienced Senior Security Architect to support a highly sensitive technology programme within a secure environment on a contract basis. The successful contractor will provide security architecture expertise across complex, business-critical systems involving multiple technologies, suppliers and delivery teams. You will help shape the programme’s security direction, ensuring that risks and protection requirements are properly considered throughout the design and implementation process. Due to the sensitive nature of the...

Senior C# IAM Developer - Auth0, Identity & Access Control, AWS - OUTSIDE IR35 Contract: 8 months Rate: £700 - £750 OUTSIDE IR35 Location: 100% remote The Role: Working for a global, market leading B2B SaaS business, you'll lead the design and implementation of secure, identity-driven Back End services in a modern C#/.NET environment. Your work will centre on authentication, authorization, and secure event-driven architectures. You'll own our Auth0 integration end-to-end , ensuring our platform meets strict security, compliance, and reliability standards. This is a role for someone who thinks deeply about threat models, defence-in-depth, and secure-by-default engineering. What You'll Do: Architect and implement secure Back End services in C# & .Net Own and evolve our Auth0 identity platform: tenant configuration, flows, hooks, rules, MFA, RBAC Design and maintain token-based security models (OIDC, OAuth2, JWT lifecycle, refresh...

Enterprise Architect/Senior Solution Architect - Insurance or Financial Services ideally £700-£770 Per day - Outside IR35 - 3 days on site per week in London We are looking for a hands-on Enterprise Architect with a strong application architecture background to support complex technology initiatives across the UK and Europe. The role will work closely with business stakeholders, engineering teams and delivery functions to understand new initiatives, define the required technology approach and produce the architecture artefacts needed to move projects into delivery. The EA practice at our client are responsible for defining and governing the target-state technology architecture across the company, ensuring alignment with Global architecture strategy while enabling cloud adoption, application modernisation, and digital transformation initiatives. With key initiatives in flight, we have a need to bolster the EA team to primarily support UK/EU initiatives and where required...

Security Architect +6 months + +SC cleared role - current active clearance is essential +Hybrid - London +Sole British national only - due to nature of the project +Outside IR35 +£600 - £700 a day We are seeking an experienced Cyber Security Architect to provide security architecture expertise across complex programmes within a secure, high-assurance environment. The successful candidate will act as a senior security authority, ensuring secure-by-design principles are embedded throughout the delivery lifecycle and providing architectural assurance across new and existing technology solutions. Key Responsibilities Design and assure secure architectures across complex technology environments. Define security architecture principles, standards and design patterns. Embed security into architecture and design governance. Review existing cloud, hybrid and on-premises architectures and identify areas for improvement. Translate cyber threats and risk into practical,...

NEC Core Systems Subject Matter Expert (SME)- London/Remote - SC and NPPV3 cleared Contract | Outside IR35 | £800 - £875 per day Initial short-term consultancy: £200 - £250 per hour Potential 6-month engagement We are looking for a highly experienced NEC Core Systems Subject Matter Expert to support an urgent assessment and transition programme within a secure policing environment. This is a specialist requirement for someone with genuine hands-on experience of NEC policing applications , particularly ControlWorks, DSx and UNIFI . The Role You will provide application-level expertise to assess the challenges, risks and requirements associated with transitioning support for critical operational policing systems. Initially, you will participate in a small number of workshops and provide an application-by-application assessment covering support risks, knowledge gaps, dependencies and immediate priorities. There is potential for this initial engagement to develop into a...

Security Architect +6 months + +SC cleared role - current active clearance is essential +Hybrid - London +Sole British national only - due to nature of the project +Outside IR35 +£600 - £700 a day We are seeking an experienced Cyber Security Architect to provide security architecture expertise across complex programmes within a secure, high-assurance environment. The successful candidate will act as a senior security authority, ensuring secure-by-design principles are Embedded throughout the delivery life cycle and providing architectural assurance across new and existing technology solutions. Key Responsibilities Design and assure secure architectures across complex technology environments. Define security architecture principles, standards and design patterns. Embed security into architecture and design governance. Review existing cloud, hybrid and on-premises architectures and identify areas for improvement. Translate cyber threats and risk into...

Security Architect +6 months + +DV cleared role - current active clearance is essential +Hybrid - London +Sole British national only - due to nature of the project +Outside IR35 +£650 - £750 a day We are seeking an experienced Cyber Security Architect to provide security architecture expertise across complex programmes within a secure, high-assurance environment. The successful candidate will act as a senior security authority, ensuring secure-by-design principles are embedded throughout the delivery lifecycle and providing architectural assurance across new and existing technology solutions. Key Responsibilities Design and assure secure architectures across complex technology environments. Define security architecture principles, standards and design patterns. Embed security into architecture and design governance. Review existing cloud, hybrid and on-premises architectures and identify areas for improvement. Translate cyber threats and risk into practical,...

AI Technical Solutions Architect - Claude, Copilot, Solutions Architecture, Digital Transformation, M&A, Cloud, Azure, AI, Infrastructure, Applications, Integration, APIs, Security, Power Platform, Copilot, TDA, Hybrid, Farringdon 4d/w, Outside IR35 This is an exceptional AI Technical Solutions Architect contract opportunity to join a leading London based tech company. The AI Technical Solutions Architect contract is Hybrid with up to 4 days a week on site in Farringdon and the other day working from home. Therefore, you must be based at a commutable distance. The AI Technical Solutions Architect contract role is Outside IR35. As AI Technical Solutions Architect you will focus on the technical solution architecture around Claude & Copilot in large scale, ever- growing M365 environments. Previous experience as a Technical Solutions Architect on Claude project is essential as is experience of Copilot. The AI Solutions Technical Architect design, govern...

AI Solution Architect - Outside IR35 We are looking for an AI Solution Architect to support a 12-week discovery programme focused on improving how regulatory, compliance and risk information can be accessed, connected and used across a large regulated organisation. This is a hands-on architecture role. You will work across a complex Microsoft/Azure estate, understand how multiple systems of record connect today, and define the target solution architecture required to support a future regulatory intelligence capability. The work will involve mapping the existing technology landscape, engaging directly with system and data owners, defining integration and onboarding requirements, and helping shape the future architecture across platform, data, security and controls. The target concept is likely to include a knowledge graph or contextual data layer, with technologies such as Azure, Microsoft Graph, GraphRAG, Neo4j, vector databases and Azure OpenAI forming part of the discovery....

Senior AI Engineer x 2 Contract - Outside IR35 - 6 months+ Oxfordshire OR London £700 - £900 per day DOE Our client is a rapidly scaling UK deep-tech company delivering advanced AI capability into some of the most consequence-heavy environments there are: defence and national security, critical national infrastructure, and enterprise clients whose decisions carry real weight. They're hiring two Senior Applied AI Engineers to take ownership of the agentic AI systems underpinning their platform, on a contract basis, with genuine influence over how those systems are architected and delivered. This role suits an engineer who designs and ships systems rather than assembling pre-built components - someone who cares more about how a system performs once it's live and under pressure than how impressive it looks in a demo. What You'll Be Doing Architecting and building multi-agent AI systems end-to-end, combining frameworks such as LangGraph or Haystack where they add value with...

Senior AI Engineer x 2 Contract - Outside IR35 - 6 months+ Oxfordshire OR London ??????? £700 - £900 per day DOE Our client is a rapidly scaling UK deep-tech company delivering advanced AI capability into some of the most consequence-heavy environments there are: defence and national security, critical national infrastructure, and enterprise clients whose decisions carry real weight. They're hiring two Senior Applied AI Engineers to take ownership of the agentic AI systems underpinning their platform, on a contract basis, with genuine influence over how those systems are architected and delivered. This role suits an engineer who designs and ships systems rather than assembling pre-built components - someone who cares more about how a system performs once it's live and under pressure than how impressive it looks in a demo. What You'll Be Doing Architecting and building multi-agent AI systems end-to-end, combining frameworks such as LangGraph or Haystack where they...

Senior AI Engineer x 2 Contract - Outside IR35 - 6 months+ Oxfordshire OR London £700 - £900 per day DOE Our client is a rapidly scaling UK deep-tech company delivering advanced AI capability into some of the most consequence-heavy environments there are: defence and national security, critical national infrastructure, and enterprise clients whose decisions carry real weight. They 're hiring two Senior Applied AI Engineers to take ownership of the agentic AI systems underpinning their platform, on a contract basis, with genuine influence over how those systems are architected and delivered. This role suits an engineer who designs and ships systems rather than assembling pre-built components - someone who cares more about how a system performs once it 's live and under pressure than how impressive it looks in a demo. What You 'll Be Doing Architecting and building multi-agent AI systems end-to-end, combining frameworks such as LangGraph or...