27 senior platform engineer jobs found

🚀 Senior GCP Platform Engineer | Outside IR35 Looking for a high-impact contract role where you’re not just maintaining systems, but building the future cloud platform? My client is working on on a major Azure → GCP migration within a complex enterprise environment. This is a hands-on, senior role with real ownership across platform design, governance, and delivery. 🔧 What you’ll be doing Lead Azure → GCP migration across critical workloads Design and build GCP Landing Zones and platform architecture Implement Terraform (IaC), CI/CD, and automation Drive best practices across security, governance, and cost optimisation Work closely with engineering teams to enable scalable, self-service platforms 🧠 What we’re looking for Strong experience with Google Cloud Platform (GCP) Proven background in platform engineering / DevOps / cloud infrastructure Hands-on with Terraform + Kubernetes (GKE ideally) Experience with cloud migrations (Azure → GCP a big...

Windows Endpoint Infrastructure Engineer | Glasgow | 3 days onsite | 12 month contract | £600-£700 per day | Outside IR35 We're looking for a highly experienced Windows Endpoint Infrastructure Engineer to join a large-scale enterprise environment. This is a hands-on, senior-level engineering role suited to someone with a strong operational background in building, running, and troubleshooting Windows infrastructure at scale. You'll be part of a specialist endpoint engineering function focused on designing, deploying, and maintaining secure Windows environments across both on-premise and cloud platforms. Working closely with cybersecurity teams, you'll deliver robust, scalable endpoint solutions that protect critical systems while ensuring high performance and reliability. This role is heavily infrastructure-focused, with a strong emphasis on automation and operational excellence. Key Responsibilities Engineer, deploy, and support Windows endpoint infrastructure across a...

Windows Endpoint Infrastructure Engineer | Glasgow | 3 days onsite | 12 month contract | £600- £700 per day | Outside IR35 We 're looking for a highly experienced Windows Endpoint Infrastructure Engineer to join a large-scale enterprise environment. This is a hands-on, senior-level engineering role suited to someone with a strong operational background in building, running, and troubleshooting Windows infrastructure at scale. You 'll be part of a specialist endpoint engineering function focused on designing, deploying, and maintaining secure Windows environments across both on-premise and cloud platforms. Working closely with cybersecurity teams, you 'll deliver robust, scalable endpoint solutions that protect critical systems while ensuring high performance and reliability. This role is heavily infrastructure-focused, with a strong emphasis on automation and operational excellence. Key Responsibilities Engineer, deploy, and support Windows endpoint...

Senior DevOps Engineer (Azure / Terraform) £550–£650 per day | Outside IR35 | 6 Month Contract | Remote Overview An exciting opportunity has arisen for a Senior DevOps Engineer to join an established project delivering within a modern, cloud-first environment. You’ll be joining a lean, high-performing team, where DevOps is central to delivery not an afterthought. This role offers a high level of ownership, with the opportunity to shape infrastructure, improve reliability, and influence engineering best practices across the wider team. We’re looking for someone with deep Azure and Terraform expertise, who is comfortable operating in a hands-on capacity, while also mentoring others and driving improvements across CI/CD, observability, and security. Role & Responsibilities Design, build, and manage Azure infrastructure using Terraform, including modules, state management, and pipelines Develop and maintain CI/CD workflows (GitHub Actions, Azure DevOps or similar)...

🚀 Building a Senior AI Engineering Team (LLM + Distributed Systems) Global Investment Bank | Capital Markets Platform 📍 London (1–2 days onsite) 💰 £700–£1,200/day (Outside IR35) Contract to permanent available 📅 12-month contracts The Mandate We are building a production-grade Agentic AI platform inside a global investment bank. This is not a research team or a chatbot project. This is engineering-heavy , focused on integrating LLM systems into large-scale, distributed environments used by trading and quant teams. We are hiring across multiple levels: Lead Engineer (Agentic / RAG focus) Architect (end-to-end platform design- Agentic / RAG focus) Senior Engineers (x3) Agentic / RAG focus Potential Director-level hire to oversee the function What This Role Requires (Read Before Applying) You must have: Experience building Enterprise production grade Agentic Ai frameworks . Multi agent. Distributed systems at scale Strong...

Senior DevOps Engineer (Azure/Terraform) £550-£650 per day | Outside IR35 | 6 Month Contract | Remote Overview An exciting opportunity has arisen for a Senior DevOps Engineer to join an established project delivering within a modern, cloud-first environment. You'll be joining a lean, high-performing team, where DevOps is central to delivery not an afterthought. This role offers a high level of ownership, with the opportunity to shape infrastructure, improve reliability, and influence engineering best practices across the wider team. We're looking for someone with deep Azure and Terraform expertise, who is comfortable operating in a hands-on capacity, while also mentoring others and driving improvements across CI/CD, observability, and security. Role & Responsibilities Design, build, and manage Azure infrastructure using Terraform, including modules, state management, and pipelines Develop and maintain CI/CD workflows (GitHub Actions, Azure DevOps or similar)...

Senior DevOps Engineer (Azure / Terraform) £550 - £650 per day | Outside IR35 | 6 Month Contract | Remote Overview An exciting opportunity has arisen for a Senior DevOps Engineer to join an established project delivering within a modern, cloud-first environment. You'll be joining a lean, high-performing team, where DevOps is central to delivery not an afterthought. This role offers a high level of ownership, with the opportunity to shape infrastructure, improve reliability, and influence engineering best practices across the wider team. We're looking for someone with deep Azure and Terraform expertise, who is comfortable operating in a hands-on capacity, while also mentoring others and driving improvements across CI/CD, observability, and security. Role & Responsibilities Design, build, and manage Azure infrastructure using Terraform, including modules, state management, and pipelines Develop and maintain CI/CD workflows (GitHub Actions, Azure...

Who are OnBuy? OnBuy are an online marketplace who are on a mission of being the best choice for every customer, everywhere. We have recently been named one of the UK 's fastest-growing tech companies in the Sunday Times 100 Tech list. All achievements we are very proud of, but we don 't let that go to our head. We are all laser focused on our mission and understand the huge joint effort ahead of us needed to succeed. Working at OnBuy: . This is a critical role responsible for building, scaling, and evolving OnBuy's core commerce platform across both front-end and back-end systems. As a Senior Full Stack Engineer, you will own engineering delivery end-to-end; from customer-facing experiences to underlying services and data systems. You will operate within a cross-functional team and be accountable for shipping high-quality, scalable solutions that directly impact GMV, seller performance, and customer experience. This role moves beyond "front-end vs back-end " you are...

Senior DevOps Engineer (Azure / Terraform) £550–£650 per day | Outside IR35 | 6 Month Contract | Remote Overview An exciting opportunity has arisen for a Senior DevOps Engineer to join an established project delivering within a modern, cloud-first environment. You’ll be joining a lean, high-performing team, where DevOps is central to delivery not an afterthought. This role offers a high level of ownership, with the opportunity to shape infrastructure, improve reliability, and influence engineering best practices across the wider team. We’re looking for someone with deep Azure and Terraform expertise, who is comfortable operating in a hands-on capacity, while also mentoring others and driving improvements across CI/CD, observability, and security. Role & Responsibilities Design, build, and manage Azure infrastructure using Terraform, including modules, state management, and pipelines Develop and maintain CI/CD workflows (GitHub Actions, Azure DevOps or similar)...

Senior DevOps Engineer (Azure/Terraform) £550-£650 per day | Outside IR35 | 6 Month Contract | Remote Overview An exciting opportunity has arisen for a Senior DevOps Engineer to join an established project delivering within a modern, cloud-first environment. You'll be joining a lean, high-performing team, where DevOps is central to delivery not an afterthought. This role offers a high level of ownership, with the opportunity to shape infrastructure, improve reliability, and influence engineering best practices across the wider team. We're looking for someone with deep Azure and Terraform expertise, who is comfortable operating in a hands-on capacity, while also mentoring others and driving improvements across CI/CD, observability, and security. Role & Responsibilities Design, build, and manage Azure infrastructure using Terraform, including modules, state management, and pipelines Develop and maintain CI/CD workflows (GitHub Actions, Azure DevOps or similar)...

Senior DevOps Engineer (Azure / Terraform) £550 - £650 per day | Outside IR35 | 6 Month Contract | Remote Overview An exciting opportunity has arisen for a Senior DevOps Engineer to join an established project delivering within a modern, cloud-first environment. You'll be joining a lean, high-performing team, where DevOps is central to delivery not an afterthought. This role offers a high level of ownership, with the opportunity to shape infrastructure, improve reliability, and influence engineering best practices across the wider team. We're looking for someone with deep Azure and Terraform expertise, who is comfortable operating in a hands-on capacity, while also mentoring others and driving improvements across CI/CD, observability, and security. Role & Responsibilities Design, build, and manage Azure infrastructure using Terraform, including modules, state management, and pipelines Develop and maintain CI/CD workflows (GitHub Actions, Azure...

Full job description About the Role Join our mission-critical data team supporting defence intelligence workflows. You’ll leverage Palantir Foundry and Python to build robust, secure data pipelines that power analytic apps for senior leadership and A-level decision-makers.   Day rate:  £700/day Outside IR35 (negotiable dependent on experience)   Key Responsibilities Design, implement and maintain data ingestion pipelines into Foundry Ontology. Develop Python/PySpark transforms to clean, enrich, and aggregate high-volume datasets. Collaborate with InfoSec to enforce security policies: ACLs, encryption, audit trails. Integrate Foundry workflows with external CI/CD tools; maintain code quality via unit tests and peer reviews. Troubleshoot performance bottlenecks in Spark and optimize cluster configurations. Mentor junior engineers and drive best practices in code documentation and data governance....

SOC Lead 6 months Bath - hybrid x3 days onsite x2 remote Active SC/DV clearance required £700 per day outside IR35 The SOC Lead - Threat Hunting & Investigations is responsible for leading advanced threat detection, proactive threat hunting, and complex security investigations across the enterprise. This role focuses on identifying unknown threats, coordinating deep-dive investigations, and elevating the maturity of SOC investigative and hunting capabilities. The role combines technical leadership, hands-on expertise, and mentorship of analysts. Key Responsibilities Threat Hunting Lead proactive, hypothesis-driven threat hunting activities across endpoint, network, cloud, identity, and SaaS environments Develop and maintain threat hunting playbooks aligned to MITRE ATT&CK techniques Identify stealthy, low-and-slow, and novel attack patterns not detected by automated controls Translate threat intelligence into actionable hunt hypotheses...

Cloud Security Engineer (GDC / IAM / Encryption) - Contract Rate: £600 day Outside IR35 Location: London - hybrid (2 days onsite) Duration: 12 months Clearance: SC eligible (5+ years UK residency), willingness for DV Overview Join a high-impact programme delivering secure, large-scale cloud infrastructure within a UK government environment. You'll help design and secure a private/distributed cloud platform supporting critical national services. Key Responsibilities Design & implement secure workloads in Google Distributed Cloud (GDC) / GCP (GDC experience not necessarily needed but would be strongly desired) Build and manage IAM architectures (SSO, MFA, privileged access lifecycle) Enforce least privilege via resource hierarchies, policies, and constraints Configure network security controls (firewalls, WAF, service perimeters) Deliver data protection & encryption (KMS, CMEK/EKM, sensitive data handling) Secure CI/CD pipelines with vulnerability...

SOC Lead 6 months Bath - hybrid x3 days onsite x2 remote Active SC/DV clearance required £700 per day outside IR35 The SOC Lead - Threat Hunting & Investigations is responsible for leading advanced threat detection, proactive threat hunting, and complex security investigations across the enterprise. This role focuses on identifying unknown threats, coordinating deep-dive investigations, and elevating the maturity of SOC investigative and hunting capabilities. The role combines technical leadership, hands-on expertise, and mentorship of analysts. Key Responsibilities Threat Hunting Lead proactive, hypothesis-driven threat hunting activities across endpoint, network, cloud, identity, and SaaS environments Develop and maintain threat hunting playbooks aligned to MITRE ATT&CK techniques Identify stealthy, low-and-slow, and novel attack patterns not detected by automated controls Translate threat intelligence into actionable hunt hypotheses...

Costello & Reyes Group Ltd has been engaged by its client, an international Pharma firm, to identify an SC Cleared Security Architect Lead for an initial 6 month engagement ( with a likelihood to extend). The Security Architect Lead will be responsible for leading the design and implementation of a Zero Trust Architecture (ZTA) framework aligned to NIST SP 800-207 Zero Trust Architecture principles. This is a strategic role focused on enhancing the organisation's security posture by implementing identity-centric, policy-driven access controls across a hybrid and cloud-first environment. Acting as the key interface between senior client stakeholders and subject matter experts (SMEs), the successful candidate will ensure that architectural decisions are robust, aligned to best practice, and deliverable within the organisation's technical and operational landscape. YOU WILL NEED TO HOLD VALID SC CLEARANCE Key Responsibilities Lead the end-to-end design and delivery...

Cloud Security Engineer (GDC/IAM/Encryption) - Contract Rate: £600 day Outside IR35 Location: London - hybrid (2 days onsite) Duration: 12 months Clearance: SC eligible (5+ years UK residency), willingness for DV Overview Join a high-impact programme delivering secure, large-scale cloud infrastructure within a UK government environment. You'll help design and secure a private/distributed cloud platform supporting critical national services. Key Responsibilities Design & implement secure workloads in Google Distributed Cloud (GDC)/GCP (GDC experience not necessarily needed but would be strongly desired) Build and manage IAM architectures (SSO, MFA, privileged access lifecycle) Enforce least privilege via resource hierarchies, policies, and constraints Configure network security controls (firewalls, WAF, service perimeters) Deliver data protection & encryption (KMS, CMEK/EKM, sensitive data handling) Secure CI/CD pipelines with vulnerability scanning...

Job Description: Agentic Tech Lead (Contract) Location: London 2-3 times a week Industry: Financial Services / Highly Regulated Duration: 7 Months (Initial) Rate: Outside IR35 The Opportunity We are looking for a high-caliber Agentic Tech Lead to drive the engineering delivery of a cutting-edge agentic AI platform. This isn't just about prompt engineering; it's about building robust, end-to-end systems that operate within the rigorous guardrails of a highly regulated environment. As the primary technical driver, you will bridge the gap between ambitious product goals and production-grade reality. You'll be hands-on across the stackfrom AWS Bedrock and Python services to complex React integrationsensuring that "agentic" translates to "value-driven" for our customers. The Technical Requirements To thrive in this role, you must be a seasoned engineer who can reason end-to-end across complex architectures. Core Stack: Expert-level proficiency in...

MERITUS are recruiting for a Technical Architect to join our client supporting major Central Government programmes, delivering secure, high-quality architecture solutions across complex IT environments. TECHNICAL ARCHITECT - OUTSIDE IR35 - £800 PER DAY - 12 MONTHS - ANDOVER (2 DAYS ONSITE PER WEEK) - TWO STAGE INTERVIEW PROCESS - SECTOR: CENTRAL GOVERNMENT / DEFENCE (SC CLEARANCE REQUIRED) As a Technical Architect, you will play a key role in designing and delivering best-in-class solutions that meet both business and technical requirements. You will ensure architectural integrity, alignment to strategy, and adherence to security and regulatory standards across the full project lifecycle. You will collaborate with multidisciplinary teams, providing technical leadership and governance while driving innovation and continuous improvement across large-scale, complex systems. Key Responsibilities: Lead the design and delivery of large-scale or complex IT systems, ensuring...

MERITUS are recruiting for a Technical Architect to join our client supporting major Central Government programmes, delivering secure, high-quality architecture solutions across complex IT environments. TECHNICAL ARCHITECT - OUTSIDE IR35 - £800 PER DAY - 12 MONTHS - ANDOVER (2 DAYS ONSITE PER WEEK) - TWO STAGE INTERVIEW PROCESS - SECTOR: CENTRAL GOVERNMENT/DEFENCE (SC CLEARANCE REQUIRED) As a Technical Architect, you will play a key role in designing and delivering best-in-class solutions that meet both business and technical requirements. You will ensure architectural integrity, alignment to strategy, and adherence to security and regulatory standards across the full project lifecycle. You will collaborate with multidisciplinary teams, providing technical leadership and governance while driving innovation and continuous improvement across large-scale, complex systems. Key Responsibilities: Lead the design and delivery of large-scale or complex IT systems, ensuring...