Citi★3.9 (21k)· London

Work with Solidity, Web3J/Web3JS/Ethers.js/Viem, Java/Spring, Node.js, and blockchains such as Ethereum, Hyperledger Besu, Canton, and Solana, using Hardhat/Foundry/Truffle for testing. Contribute to Citi's Integrated Digital Assets Platform (CIDAP) building Web3 components for tokenization, smart contracts, and on-chain settlement.

Richmond Pharmacology★2.6 (29)· London

The Senior Test Engineer will work with Azure DevOps, Jira, CI/CD, APIs, integrations, SAST, and DAST. The role establishes automated regression testing and test management for new and existing systems, supporting the organization’s shift from bespoke solutions to third-party platforms.

Cloudflare★3.2 (1.8k)· London

Interns work with Rust, C, Go, Python, and Gitlab/Github. Cloudflare’s Research Team solves difficult problems in security, privacy, and systems at scale. Projects may involve AI, distributed systems, privacy, and trusted execution environments.

Richmond Pharmacology★2.6 (29)· London

You will work with Azure DevOps, Jira, dedicated test automation tooling, APIs, CI/CD pipelines, and security tools (SAST, DAST). Your role designs and maintains automated regression test packs for Richmond’s mixed estate of in-house, SaaS/COTS, and low-code/no-code platforms, supporting release assurance, validation, and audit readiness.

You will work with Keyfactor, EJBCA, Azure AD, ADCS, ADFS, NDES, PowerShell, HSM, and CLM tools. This contract role involves designing, deploying, and managing certificate lifecycles in PKI and cloud identity platforms.

Work with AWS or Azure on a UK-first PKI project for a digital security company. This DevOps role supports a growing team disrupting the sector.

Palo Alto Networks★3.8 (154)· London

Technologies include TCP/IP, routing (BGP, OSPF), VPNs, authentication (LDAP, TACACS+), and tools like Wireshark, with Python or Shell scripting. The team provides expert post-sales support for Palo Alto Networks’ cybersecurity products, focusing on complex troubleshooting, root cause analysis, upgrade planning, and customer advocacy.

Work with Azure (AKS, ACR, App Service, Functions, VNets, APIM, Front Door, Key Vault), Terraform/Bicep, GitHub Actions/Azure DevOps, Docker, and observability tools. Build and operate Azure-based CI/CD platform across multiple products for IP Development.

WPP★3.7 (375)· London

You will govern secure software development across cloud-native platforms, APIs, AI-enabled applications and CI/CD pipelines, using tools like SAST, DAST, SCA and SBOM practices. This role within WPP’s Digital Security & Risk Management team defines secure-by-design standards and partners with engineering and product teams to embed security into development lifecycles.

You will work with AWS, including EKS, and use SAST, DAST, dependency and container scanning tools within CI/CD pipelines, as well as AI and automation. CAIS builds a platform that gives financial advisors access to alternative investments. As the lead, you will own the secure development lifecycle, threat modeling, and security architecture across the engineering team.

You will lead a team of DevOps engineers, working hands-on with Kubernetes, CNCF tools (Istio, Kyverno, Flux, Crossplane), Terraform, AWS/GCP, and GitOps to build a multi-cluster, multi-region platform. Elliptic’s infrastructure supports tracing and disrupting illicit crypto across blockchains.

Elliptic★0.0· London

Work with Kubernetes, CNCF tools (Istio, Linkerd, Cluster API, Kyverno, Flux, Flagger, Crossplane, OPA), Terraform, GitOps, and observability platforms like DataDog. The team builds and evolves the internal developer platform and infrastructure for Elliptic’s blockchain intelligence product that traces illicit crypto transactions. You will lead a team of DevOps engineers.

You will work with AWS and Azure, Terraform, Kubernetes, Wiz, SIEM, and CI/CD tooling for SAST, DAST, and dependency scanning. You will own cloud security posture as part of a Platform Security function for HealthHero, Europe’s largest digital clinic, building an AI-driven digital healthcare platform.

The role involves building and maintaining AWS cloud infrastructure using Terraform, GitHub Actions, Docker, Linux, and Python/Bash. You will develop CI/CD pipelines for a greenfield project to deliver secure, scalable cloud environments.

Universal Music Group★4.0 (408)· London

Work with Palo Alto Networks firewalls, Cisco ISE, 802.1X/RADIUS, syslog, API-based and cloud-native logging, and SIEM. You will join the Global Network Infrastructure team designing, standardizing, and operating enterprise firewall and perimeter security for Universal Music Group, the world’s leading music company.

You will work with Azure (including AKS), Kubernetes, Terraform, Python, GitHub Actions, SAST/DAST/IAST/SCA tools, and security-as-code. You will integrate security throughout the SDLC for a health research charity, securing APIs, CI/CD pipelines, and containerised environments.

Works with SAST, DAST, SCA, Burp Suite, OWASP ZAP, Semgrep, Python, Java, Kotlin, Go, JavaScript, and CI/CD pipelines (GitHub Actions

You will work with Golang, OAuth2, OIDC, SAML, JWT, PostgreSQL, and cloud-native technologies to design and build proprietary identity federation, authentication, and authorization infrastructure for an AI-native cloud platform. This role also touches on Kubernetes, Keycloak, and Auth0. You will be a hands-on technical leader driving design and development of critical systems, including the GPU orchestration layer and core platform APIs, while mentoring engineers across multiple squads.

Palo Alto Networks★3.8 (154)· London

You will work with SASE, cloud security, networking protocols (BGP/OSPF/EIGRP, IPSEC, SSL, TCP/IP), authentication protocols (SAML, SSO, LDAP, RADIUS), Linux, BASH, and Python. As a Customer Success Engineer on the SASE team, you act as the day-to-day technical contact for customers, guiding adoption and integration of Palo Alto Networks SASE solutions.

Palo Alto Networks★3.8 (154)· London

Develop software in Golang for the Workload Identity team at Palo Alto Networks, tackling challenges in networking, security, cloud, and Kubernetes across client and server. As the team’s technical lead, you will design, prototype, and guide implementation.

You'll operate Blockchain.com's product security program across Consumer, OTC, and MRE products, working with Java, Kotlin, TypeScript, Python, and Kubernetes. You'll design and run the secure development lifecycle, lead threat modeling for authentication/payments/custody flows, architect CI/CD security automation (SAST/SCA/DAST), conduct code audits, and build fuzzing/property tests to protect billions in transaction volume. You'll embed with product and engineering teams, mentor junior engineers, and translate security findings into business-prioritized remediation.

ZeroRISC seeks a senior engineer to design and build cloud services, APIs, and backend systems using Go and Python that integrate with their embedded platform for silicon security and supply chain integrity. You'll work on distributed systems, cloud infrastructure, and RESTful APIs while collaborating with the engineering team on scalable, reliable systems serving IoT and critical infrastructure sectors. The role requires 6+ years of cloud infrastructure or service development experience, with familiarity with AWS/GCP/Azure, Docker, and Kubernetes preferred.

You'll develop security-focused cloud services and infrastructure using Go and Python, designing APIs and backend systems that integrate with zeroRISC's embedded platform for device ownership and supply chain integrity. ZeroRISC, founded by OpenTitan creators, provides high-assurance software rooted in open silicon designs for silicon production, IoT, and critical infrastructure sectors. This early-career role involves building scalable, reliable systems with opportunities for growth in a seed-stage startup environment.

Universal Music Group★4.0 (408)· London

You will work with CyberArk PAM platforms (Vault, CPM, PVWA, PSM), PKI systems including Microsoft ADCS, and scripting/automation tools like PowerShell, Python, and Terraform. You'll design and operate enterprise-grade privileged access management and public key infrastructure across Universal Music Group's global, hybrid cloud environment, integrating PAM and PKI controls across infrastructure, applications, and CI/CD pipelines while partnering with security, infrastructure, and application teams.

You'll own cloud and product security across StackOne's AWS and Cloudflare infrastructure, working with TypeScript, Python, and AWS CDK/Terraform. You'll harden the secure SDLC, run end-to-end pen testing, threat-model features powering connectors and OAuth flows, and embed security into engineering workflows for an AI Integration Gateway that orchestrates 200+ SaaS connectors. Reporting to the CTO, you'll have broad platform scope from CI/CD to multi-tenant APIs to authentication incident response.