Platform Engineer

Risk Ledger

ABOUT US Risk Ledger is developing a network of connected organisations, all working together to defend against cybersecurity attacks in the supply chain. Organisations rely on us to establish trust, through sharing their security maturity and visualising the risks posed by their supply chain ecosystem. And we’re already trusted by customers like ASOS, British Airways, BAE Systems and the NHS. We are putting together an amazing and talented team from a diverse set of backgrounds and skillsets to drive us towards our vision. Risk Ledger is built on the respect we have for one another and our users, united by our shared values and mission. Every one of us is still learning: it’s how we grow as individuals. We’re curious. We’re ambitious. And we’re humble and honest. At Risk Ledger, we aim high to find the best solutions we can and always put our users first. THE TEAM: You'll join a cross-functional department of Software Engineers, Product Managers and Designers, all collaborating with the wider business to achieve impactful product outcomes. You'll be part of a small, growing Platform team, working closely with the wider engineering function. We care deeply about building the right thing, in order to fundamentally shift mindsets in the cybersecurity industry. We ship quickly and continuously in order to learn and iterate, whilst always pushing for a high quality bar and keeping security and automation front and centre - the latter two being critical components of this role. The core of our stack is Golang, Typescript (VueJS), PostgreSQL , AWS, Google Cloud and Grafana Cloud, with modern design philosophies and a cloud-native approach. THIS ROLE: This role combines aspects of Platform Engineering, Site Reliability Engineering, Developer Experience, and DevSecOps. Working alongside the wider team, you'll build and maintain the foundational systems, tools, and practices that enable our engineering teams to deliver secure, scalable, and reliable software efficiently at pace. You'll be hands-on across the stack, contributing to the standards and consistency we hold across the engineering organisation, and you should expect to manage multiple priorities and operate at varying levels of detail. You'll join a team that treats our platform as a product, putting the developer experience at the heart of everything you do. Your mission is to build a seamless, secure and reliable path from code to production, enabling our engineering teams to ship value quickly and safely. Day-to-day, you’ll collaborate with engineers, product managers, technical leadership and the wider business on strategic initiatives that deliver real value to our customers. IN THE ROLE YOU WILL; * Build and maintain scalable, resilient cloud infrastructure. Working across our products and supporting services, you'll develop and maintain our cloud services and infrastructure in AWS (primary) and GCP. You'll build and operate environments using Terraform and patterns like container orchestration on ECS/EKS , while helping to improve observability, reliability and performance. * Accelerate product delivery through platform engineering. Contribute to the build of pipelines, tooling and internal platforms that enable fast, safe, automated that seeks to reduce friction across the delivery lifecycle. * Improve developer experience with self-service tooling and standardisation. Help build the frameworks, tools, self-service platforms and golden paths that streamline workflows, eliminate toil, and promote consistent best practices, so software engineers can focus on high-value customer delivery. * Support reliability and sacabibility through SRE principles and proactive operations. In partnership with product and engineering teams, you'll participate in incident response, help define and monitor SLI/SLO/SLAs, and work to optimise systems for availability, resilience, performance, and cost. * Embed security across the engineering lifecycle. Help integrate shift-left security practices into CI/CD pipelines and product workflows so vulnerabilities are caught early and consistently. Support the management of secrets, credentials, and identity access controls, and help enforce compliance through automated policies. * Contribute to a strong security posture. Working with our Information Security team, you'll help monitor, triage and respond to security events, and support a strong security posture through continuous vulnerability scanning, dependency management and threat modelling. * Move fast, with an eye for quality. You enjoy moving fast while maintaining a high quality bar through testing, automation, discipline, consistency and best practice, whilst treading a careful line in pragmatism and cost-benefit analysis. * Share knowledge and grow. You'll share what you know with colleagues, support more junior engineers, and actively grow your own technical and architectural skills with the team around you. * Support our AI/ML platform tooling. From time to time you'll help maintain the infrastructure and supporting tooling behind our AI and ML capabilities (e.g. Vertex AI on GCP, AWS Bedrock, and LLM observability tooling such as Langfuse). This is a supporting part of the role rather than its focus. YOU'LL HAVE; * Experience working in engineering teams building a customer-focused SaaS product, weighing delivering value to clients against technical excellence. * 4+ years of experience in Platform Engineering, SRE, or DevOps roles. * Good working knowledge of cloud platforms (AWS and/or GCP), managed services and infrastructure automation tools (Terraform or similar). * Proficiency in containerisation and orchestration (Containers, ECS, Kubernetes a plus). * Proficiency in one or more programming or scripting languages (such as Go, TypeScript/JavaScript, Python or Bash), with a background in software engineering being a major plus. * Experience building or maintaining CI/CD systems (GitHub Actions preferable, ArgoCD etc). * Experience with monitoring, alerting and logging stacks (the Grafana stack: Prometheus, Loki, Tempo; plus OpenTelemetry). * A working understanding of networking and distributed systems. * A working understanding of security and an interest in DevSecOps. * An ability to work through ambiguity, and comfort tackling problems that aren't always well defined. * A keen sense of curiosity, with a natural drive to learn and grow. * A passion to work collaboratively with others. We like to work as a team, not a collection of individuals, and we expect you to have the same mindset. YOU MIGHT HAVE; * Knowledge of policy-as-code. * Familiarity with supply chain security. * Exposure to cost optimisation and FinOps practices. * Experience with internal developer platforms or portal tooling (e.g. Backstage, Get Port). * Exposure to LLM observability or evaluation tooling (e.g. Langfuse). Salary range £90,000—£110,000 GBP

Valarian

Valarian Technologies is a dual-use technology company building critical tools to safeguard the future in an era of evolving global security challenges. We're rethinking security beyond traditional military domains, addressing asymmetric threats that impact our technological advantage, economic strength, and democratic institutions.   We build Acra – the platform foundation for everything we do as a dual-use technology company. The platform’s name, rooted in the Greek word for citadel (or, fortress), reflects the design and purpose of our infrastructure-agnostic secure enclaves: protecting critical data. Some of the government and commercial workflows include: increased operational resiliency for mission-critical systems and functions; enabling organizations to more quickly and widely adopt emerging technologies while ensuring the integrity of their intellectual property; information flow during disaster response scenarios, and zero-trust / least-privilege environments for M&A, attorney-client privileged communications, etc. And we’ve only scratched the surface.   At our core, we're driven by a shared mission and a belief in making a tangible impact on our world. Whether you join our London HQ or the wider global organisation, you’ll be a part of collaborative, high-performing teams, creating cutting-edge software, platforms, and infrastructure.     The Role   We are looking for a Platform Engineer to help build the internal platform capabilities that allow our engineering teams to move quickly without compromising security, reliability, or operational control. This role is more software and product-oriented than a traditional infrastructure role. You will work closely with backend engineers, infrastructure engineers, product teams, and leadership to design and build the tooling, workflows, integrations, and platform primitives that make ACRA easier to develop, deploy, operate, and extend. You will treat the platform as a product. Your users are our engineers. Your goal is to make the safe, reliable, and repeatable path the easiest path: through clean abstractions, useful automation, golden paths, reusable templates, deployment workflows, observability patterns, and developer-facing tooling. We are looking for someone hands-on, curious, and comfortable working across a broad set of DevOps, platform, and CNCF tools. You should have a software engineering mindset and care about maintainability, automation, user experience, reliability, and long-term platform design, not just scripts and infrastructure tasks. You should be able to take ownership of defined areas, move quickly, work well with engineers across the stack, and turn ambiguous platform needs into useful, reliable systems. This is not an internal IT role, cloud administration role, or generic DevOps support role. You will help build the platform as a product. What you’ll do:   Build and improve the internal platform capabilities used by both engineering teams and customers across ACRA. Design and implement tooling, automation, workflows, and integrations that improve developer velocity and operational consistency. Work closely with backend engineers to make services easier to build, test, deploy, observe, secure, and operate. Build platform primitives for application lifecycle management, environment provisioning, deployment automation, configuration, secrets, observability, and controlled execution. Build and improve golden paths, reusable templates, and self-service workflows for engineering teams. Work with Kubernetes, Docker, Terraform, Argo CD, GitOps, GitHub Actions, Helm, Kustomize, container registries, secrets management, and CNCF tooling. Write code and automation in languages such as Go, Python, TypeScript, or JavaScript. Improve CI/CD pipelines, release workflows, deployment safety, rollback strategies, and environment management. Integrate platform tools into coherent workflows rather than disconnected infrastructure pieces. Evaluate, introduce, and operationalise CNCF tools where they improve the platform. Build systems that work across GCP, on-premise, bare-metal, sovereign cloud, air-gapped, and customer-managed environments. Contribute to observability, alerting, logging, tracing, dashboards, and production debugging workflows. Define platform standards, golden paths, reusable templates, and operational patterns. Work with infrastructure engineers on the boundaries between platform tooling and core infrastructure. Take ownership of defined projects and grow into broader technical responsibility over time.   What we are looking for:  Experience in platform engineering, DevOps, infrastructure engineering, backend engineering, SRE, or developer tooling. Strong hands-on experience with Kubernetes, Docker, CI/CD, and modern deployment workflows. Comfortable writing production-quality automation or tooling in at least one language such as Go, Python, TypeScript, or JavaScript. Familiarity with infrastructure as code and GitOps workflows, especially Terraform, Argo CD, Helm, Kustomize, or similar tools. Experience working with CI/CD systems such as GitHub Actions or similar tooling. Good understanding of how applications are built, containerised, deployed, configured, monitored, and operated. Strong system design fundamentals, especially around reliability, scalability, observability, failure handling, and maintainability. Product-minded approach to platform engineering. You care about why the platform is being built, not just what needs to be implemented. Evidence of building useful tools, automation, deployment systems, reusable templates, self-service workflows, or platform capabilities for other engineers. Comfortable working with backend engineers and understanding application-level requirements. Able to move quickly while still building systems that are understandable, maintainable, and safe. Self-driven, curious, and comfortable taking ownership of defined areas of work. Comfortable working in a startup environment with changing priorities and broad technical exposure. Strong communication skills. You can work across infrastructure, backend, product, and leadership without adding unnecessary process or noise.   Nice to have: Experience building internal developer platforms, paved roads, golden paths, or platform-as-a-product capabilities. Experience working in startups, product engineering teams, infrastructure teams, or platform teams with broad ownership. Experience with GCP, on-premise, bare-metal, air-gapped, or restricted deployment environments. Experience with service mesh, network policy, ingress and egress control, or secure service-to-service communication. Familiarity with secrets management tools such as Vault, OpenBao, SOPS, Sealed Secrets, External Secrets, or cloud-native secret managers. Familiarity with supply-chain security concepts such as image signing, vulnerability scanning, SBOMs, artefact verification, admission control, or policy-as-code. Experience with CNCF tools such as cert-manager, External Secrets, OPA, Kyverno, Gatekeeper, Crossplane, Backstage, Argo Workflows, Flux, Prometheus, Grafana, Loki, OpenTelemetry, Istio, Cilium, or Envoy. Experience with backend engineering, APIs, microservices, event-driven systems, or Go services. Experience contributing to systems where auditability, traceability, and operational evidence are important. Experience with secure or regulated environments, such as defence, government, fintech, healthcare, critical infrastructure, sovereign cloud, or customer-managed deployments.   Benefits:   Our benefits are designed to ensure our employees feel taken care of and are proud to be a part of the Valarian team. We are committed to consistently enhancing our benefit package, taking into account the overall well-being and needs of our teammates. Here are the key benefits accessible to all employees at Valarian Technologies: Equity – because you have the right to own what you’re building A competitive salary – because we value your unique skills Employer pension contributions – because you deserve a secure future Hybrid work setup – because everyone has different needs Rewarding company retreats and meetups that respect your work/life balance – because we love getting to know each other! Life at Valarian Our culture is built on inclusivity, compassion and flexibility – we want everyone to be empowered to achieve their goals at Valarian.   The world is changing, and so is our way of working. If you want to join us in the London office – it’s quite nice! – you’re welcome to; and if you’d prefer to work remotely, that’s fine too.   And as we build elegant solutions to simplify the complexities of business collaboration, we also simplify work life: contribute wherever and whenever allows you to be your best self. We trust each other to consistently raise the bar, and we challenge each other to continually reach new heights.

Qube Research & Technologies

Qube Research & Technologies (QRT) is a global quantitative and systematic investment manager, operating in all liquid asset classes across the world. We are a technology- and data-driven group implementing a scientific approach to investing. Combining data, research, technology, and trading expertise has shaped our collaborative mindset, which enables us to solve the most complex challenges. QRT’s culture of innovation continuously drives our ambition to deliver high-quality returns for our investors. The AWS Cloud Platform Engineering team designs and operates cloud-native platforms that support internal development teams across the firm. The team focuses on building and evolving an Internal Developer Platform that enables secure, automated, and self-service cloud capabilities. You will collaborate with Cloud Engineering, Security, and cloud users to improve developer experience and platform reliability. Your Future Role within QRT You will: * Design, develop, and manage platform APIs to automate cloud workflows and enable self-service capabilities * Build backend services in Go and/or Python to support automated provisioning and platform functionality * Write and maintain automated tests to ensure safe and reliable execution of platform workflows * Contribute to platform observability, including logging, monitoring, and tracing * Build and operate services on Kubernetes (EKS) * Collaborate with Cloud Engineering, Security, and internal users to deliver scalable and secure platform capabilities * Contribute to architectural and technical decisions as the platform evolves Your Present Skillset * 5+ years of experience as a Platform Engineer or in a similar role with a focus on AWS * Strong programming skills in Python and/or Go, with experience writing production-grade code * Experience designing and developing RESTful APIs * Experience writing and maintaining automated tests * Experience with workflow or orchestration tools such as Temporal or AWS Step Functions * Experience building and operating services on Kubernetes (EKS) * Solid understanding of cloud architecture and distributed systems fundamentals * Experience with Infrastructure as Code tools such as Terraform * Familiarity with CI/CD pipelines and automation practices * Strong communication skills and ability to collaborate effectively across teams QRT is an equal opportunity employer. We welcome diversity as essential to our success. QRT empowers employees to work openly and respectfully to achieve collective success. In addition to professional achievement, we are offering initiatives and programs to enable employees achieve a healthy work-life balance.