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Showing 20 results from 20 source listings checked · 1,729 UK listings on FreeHire.
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Reflection New York, NY; London; San Francisco, CA onsite Posted 29 days ago
You will architect and optimize training infrastructure for reinforcement-learning loops, distributed GPU systems, and large-scale data pipelines. You will turn research ideas into reliable production systems, build…
Reflection New York, NY; London; San Francisco, CA onsite Posted 29 days ago
You will build and operate shared services, APIs, SDKs, and internal platforms. You will define reliability targets, maintain operational readiness, improve correctness and performance under load, and reduce operational…
Figma London, England Posted 1 month ago £90,000–£150,000 a year
Figma is growing our team of passionate creatives and builders on a mission to make design accessible to all. Figma’s platform helps teams bring ideas to life—whether you're brainstorming, creating a prototype,…
Radley James London, United Kingdom hybrid Posted 1 month ago
A leading digital-assets trading firm is seeking an experienced Full Stack Engineer to build high-performance trading products, client portals and internal applications. The role You will own features across the full…
Reflection San Francisco, CA; London; New York, NY onsite Posted 29 days ago
You will lead, mentor, and grow data ingestion engineers while remaining hands-on with the technical stack. You will prioritize work, run acquisition campaigns, guide architecture across crawling, pipelines, and data…
Reflection San Francisco, CA; London; New York, NY onsite Posted 29 days ago
You will define and operationalize measurable data-quality standards for LLM pre-training. You will analyze data, build and validate automated QA methods alongside human-in-the-loop processes, create reusable quality…
Reflection San Francisco, CA; London; New York, NY onsite Posted 29 days ago
You will define and operationalize measurable data-quality standards for LLM post-training and evaluation. You will analyze datasets, build and validate automated QA methods, create reusable quality pipelines, provide…
Reflection San Francisco, CA; London; New York, NY onsite Posted 29 days ago
You will build and operate systems that acquire, extract, normalize, version, and deliver large-scale data for pre-training. You will run experiments on crawling and extraction strategies, analyze data quality and…
Reflection San Francisco, CA; London; New York, NY onsite Posted 29 days ago
You will build systems that transform pre-trained models into aligned and general agents. You will develop data-generation pipelines, reward models, reinforcement-learning algorithms, and inference-time scaling…
Reflection New York, NY; London; San Francisco, CA onsite Posted 29 days ago
You will build and operate foundational cloud, networking, security, developer infrastructure, and observability capabilities. You will create secure defaults, operate networking primitives, improve delivery systems,…
Reflection San Francisco, CA; London; New York, NY onsite Posted 29 days ago
You will lead systems engineers building shared services for research, training, and production. You will prioritize work, guide distributed-systems architecture, make hands-on contributions, and translate research and…
Reflection San Francisco, CA; London; New York, NY onsite Posted 29 days ago
You will lead infrastructure and platform engineers building cloud, networking, security, and developer infrastructure. You will prioritize execution, guide architecture, make hands-on contributions, establish secure…
Reflection San Francisco, CA; London; New York, NY onsite Posted 29 days ago
You will lead and grow a data platform engineering team while guiding the technical direction of data ingestion, orchestration, processing, storage, quality, and governance. You will work hands-on on designs,…
Reflection San Francisco, CA; London; New York, NY onsite Posted 29 days ago
You will lead systems engineers building and operating a Kubernetes-based multi-cloud compute platform. You will prioritize delivery, guide architecture, contribute hands-on where needed, work with training teams on…
Reflection San Francisco, CA; London; New York, NY onsite Posted 29 days ago
You will lead, mentor, and grow full-stack engineers while remaining hands-on with the technical stack. You will prioritize work, manage projects, guide architecture, deliver internal and customer-facing product…
Reflection New York, NY; London; San Francisco, CA onsite Posted 29 days ago
You will design and implement ingestion and orchestration for batch and streaming workloads. You will build scalable storage and compute foundations, maintain reproducible pipelines, establish data quality and…
Reflection New York, NY; London; San Francisco, CA onsite Posted 29 days ago
You will build and maintain tooling for automated remediation, topology-aware scheduling, capacity planning, and hardware debugging. You will improve cluster management for large GPU fleets, implement cluster-wide…
Reflection New York, NY; London; San Francisco, CA onsite Posted 29 days ago
You will build dashboards, admin tools, self-service workflows, and customer-facing product surfaces. You will own delivery across user interfaces, APIs, authentication, role-based access control, and audit trails;…
Reflection New York, NY; London; San Francisco, CA onsite Posted 29 days ago
You will identify and integrate data sources, design evaluations and feedback loops, analyze model failures, create targeted datasets and reward signals, run human and synthetic data programs, build reliable data…
CHAOS Industries London, England, United Kingdom Posted 29 days ago
Security clearance required
CHAOS Industries is redefining modern defense with a multi-product portfolio that gives the ultimate advantage—domain dominance. The company's products are powered by Coherent Distributed Networks (CDN™), empowering…