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Agent guide: [/agents.md](https://www.wearedevelopers.com/agents.md). --- # Staff Software Engineer - **Company:** Coreweave Uk Ltd. - **Location:** London, UK - **Salary:** £116,000.0 - £155,000.0 - **Contract:** Permanent contract - **Skills:** Application Programming Interfaces (APIs), Artificial Intelligence, Systems Engineering, C++ (Programming Language), Cloud Computing, Computer Clusters, Compilers, Distributed Systems, Python (Programming Language), Software Engineering, High Performance Computing, Concurrency, Build Management, Kubernetes, Hardware Infrastructure, Golang, Programming Languages - **Published:** September 17, 2026 - **Apply:** https://startup.jobs/staff-software-engineer-runtime-systems-coreweave-europe-10090229 ## About the Role * Significant experience building complex systems software, distributed infrastructure, runtimes, workflow systems, or adjacent technology. * Deep expertise in at least one of: * Distributed systems * Runtime systems * Workflow or execution engines * Programming languages, compilers, or interpreters * Cluster scheduling and orchestration * High-performance or systems software Strong software engineering fundamentals and production coding ability. Experience designing APIs, protocols, schemas, or contracts between independently evolving systems. Strong understanding of distributed-system failure modes, state, authority, retries, concurrency, and side effects. Strong technical judgement around when abstraction helps and when it simply moves complexity elsewhere. Comfortable entering unfamiliar technical domains and building depth quickly. Strong communication skills and experience influencing architectural decisions across teams. Experience with some of the following would be valuable, but is not required: * Go, Rust, C/C++, or Python. * Kubernetes and containerised infrastructure. * Argo, OSMO, Temporal, Ray, Kubeflow, or similar systems. * GPU clusters or large-scale AI infrastructure. * High-performance computing. * Simulation, robotics, autonomous systems, or Physical AI. * Programming language or compiler research. * Performance engineering. * Cloud infrastructure at scale. * Platforms designed to be operated by autonomous software or AI agents. ## Description We're seeking a Staff Software Engineer, Runtime Systems to help design and build this layer. This is a hands-on systems engineering role at the intersection of distributed systems, runtimes, workflow execution, programming language concepts, and large-scale compute infrastructure. You'll work on the foundations that allow complex workloads to move from an abstract description into reliable execution across systems such as Kubernetes, Argo, OSMO, and future execution environments. A major part of the role is deciding where abstraction is useful - and where it creates more complexity. Rather than building another universal workflow engine, you'll help establish clear contracts between our platform and the systems that execute work, while preserving native capabilities. You'll operate across architecture and implementation: defining contracts, writing production software, validating assumptions against real workloads, and working closely with platform and infrastructure teams. In this role, you will: * Runtime Systems & Architecture * Design and build runtime components for complex AI, simulation, and engineering workloads. * Define abstractions for workloads, execution environments, dependencies, state, capabilities, and failure. * Design interfaces between higher-level services and systems such as Kubernetes, Argo, and OSMO. * Establish clear boundaries around which systems own state, decisions, and side effects. * Make architectural decisions balancing simplicity, extensibility, performance, and operational reality. * Execution Models & Contracts * Define durable contracts between workload definitions, control-plane services, and execution backends. * Develop typed representations and schemas that allow workloads to be transformed safely across systems. * Design compatibility and evolution mechanisms for those contracts. * Build conformance and validation mechanisms that make guarantees executable rather than dependent on documentation. * Reason deeply about retries, partial failure, idempotency, cancellation, dependencies, and uncertain outcomes. * Hands-On Systems Engineering * Write production-quality software for critical runtime and control-plane components. * Build adapters and integrations for heterogeneous execution environments. * Diagnose behaviour across application, orchestration, cluster, and infrastructure boundaries. * Improve the reliability, observability, and debuggability of distributed workload execution. * Work closely with Go, Kubernetes, and infrastructure engineers to turn architecture into production systems. * Performance & Experimentation * Develop rigorous ways to understand workload performance across large-scale GPU infrastructure. * Design experiments that separate real performance gains from noise, warm-up effects, scheduling behaviour, and stragglers. * Build repeatable workload and benchmark environments. * Use evidence from real execution to challenge assumptions and guide platform development. * Technical Leadership * Lead ambiguous systems problems where the correct architecture is not yet known. * Reduce complex problems into smaller contracts and mechanisms that can actually be implemented. * Challenge unnecessary abstraction and simplify designs where complexity has outgrown its value. * Influence technical direction across teams without requiring direct authority. * Mentor engineers and contribute to technical hiring and engineering standards., Wondering if you're a good fit? We believe in investing in our people, and value candidates who can bring their own diversified experiences to our teams - even if you aren't a 100% skill or experience match. Here are a few qualities we've found compatible with our team: * Systems Thinker: You ask where authority lives, what guarantees actually exist, and what happens when systems fail. * Technically Deep: You want to understand how systems really behave, not just how they are supposed to behave. * Pragmatic: You value elegant engineering, but care more about whether it works for real workloads. * Evidence-Driven: You test assumptions and change direction when the evidence says you should. * Strong Technical Leader: You can form a view, challenge senior stakeholders, and bring others with you. * Commercially Aware: You understand that technical decisions need to improve customer outcomes, engineering velocity, reliability, or economics. * Ownership Mentality: You take responsibility for getting difficult systems into production. ## Related Videos - [Go with the Flow: Stop the Leaks Before Your Memory's a Waterfall!](https://www.wearedevelopers.com/videos/100073-go-with-the-flow-stop-the-leaks-before-your-memory-s-a-waterfall) - [Just-in-time Compilation in JVM](https://www.wearedevelopers.com/videos/240-just-in-time-compilation-in-jvm) - [Understanding Kubernetes in a visual way](https://www.wearedevelopers.com/videos/100085-understanding-kubernetes-in-a-visual-way) - [Shipping Faster with Less: Render on Cloud Hosting, AI Workloads, and the Future of DevOps](https://www.wearedevelopers.com/videos/1894-shipping-faster-with-less-render-on-cloud-hosting-ai-workloads-and-the-future-of-devops) - [Retooling and refactoring - an investment in people.](https://www.wearedevelopers.com/videos/371-retooling-and-refactoring-an-investment-in-people) - [Scoring 2000 Products per Request: Performance Pitfalls in Golang](https://www.wearedevelopers.com/videos/2073-scoring-2000-products-per-request-performance-pitfalls-in-golang) ## Related Articles - [Is Software Engineering Over-Saturated?](https://www.wearedevelopers.com/magazine/418-is-software-engineering-over-saturated) - [The 12 Best Jobs for Software Engineers](https://www.wearedevelopers.com/magazine/401-the-12-best-jobs-for-software-engineers) - [How We Built a Worry-Free System That Runs for 10+ Years – And What We’d Do Again](https://www.wearedevelopers.com/magazine/751-how-we-built-a-worry-free-system-that-runs-for-10-years-and-what-we-d-do-again) - [Dev Digest 120 - Apple and peers](https://www.wearedevelopers.com/magazine/455-dev-digest-120-apple-and-peers) - [Where To Find Software Engineering Jobs](https://www.wearedevelopers.com/magazine/396-where-to-find-software-engineering-jobs) - [Navigating the AI Shift](https://www.wearedevelopers.com/magazine/629-navigating-the-ai-shift)