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Jobs in United Kingdom
24 open roles read nightly from companies’ own hiring pages. Each one links to the original ad.
1–20 of 24 jobs
Reflection · San Francisco, California, United States +2
On-siteFull-timeLead / staffData & AIReflection's Data team builds the training corpora our frontier models learn from. Before a model can learn anything, the data has to be found, fetched, extracted, and delivered reliably, responsibly, and at enormous scale. The ingestion layer is the machinery that turns the…
Reflection · New York, United States +2
On-siteFull-timeLead / staffScience & researchYou will build the evaluation infrastructure that researchers use to understand model capabilities, guide training decisions, and assess readiness for release. The role spans evaluation authoring, distributed execution, and results analysis, with a particular focus on…
Member of Technical Staff - Shared Services
5 weeks agoReflection · New York, United States +2
On-siteFull-timeLead / staffEngineeringReflection AI is an equal opportunity employer. We do not discriminate on the basis of race, color, religion, sex (including pregnancy), sexual orientation, gender identity or expression, national origin, ancestry, age, marital status, disability, genetic information, veteran…
Member of Technical Staff - Data Platform
5 weeks agoReflection · New York, United States +2
On-siteFull-timeLead / staffData & AIBuild the core data systems and pipelines that power our research, training, and production environments. Design and implement reliable, scalable ingestion and orchestration patterns for batch and streaming workloads. Develop the storage and compute foundations that enable…
Reflection · San Francisco, California, United States +2
On-siteFull-timeLead / staffData & AIReflection is building the trusted data backbone for the world's most capable open-weight AI systems. The Data Platform team builds and operates the core data systems and pipelines that power our research, training, and production environments unifying ingestion, processing,…
Reflection · San Francisco, California, United States +2
On-siteFull-timeLead / staffEngineeringReflection's Compute Platform team keeps our compute layer healthy and highly available. We run a Kubernetes-based platform distributed across multiple neo-clouds, where multi-cloud scheduling, node health, and performance debugging at scale present genuinely hard systems…
Reflection · San Francisco, California, United States +2
On-siteFull-timeLead / staffData & AIDesign and operate large-scale multilingual data pipelines — sourcing, cleaning, deduplication, language identification, and script normalization across high- and low resource languages.; Define and enforce quality bars for multilingual corpora, including translation quality,…
Member of Technical Staff, Data Flywheel
2 months agoReflection · New York, United States +2
On-siteFull-timeLead / staffData & AIThe Data Flywheel team closes the gap between benchmark performance and useful performance in the real world. We identify and build the signals, data, and feedback loops that turn model usage into rigorous evaluations, targeted training data, and measurable improvements in…
Member of Technical Staff - Post-Training
2 months agoReflection · San Francisco, California, United States +2
On-siteFull-timeLead / staffScience & researchBuild systems that transform powerful pre-trained models into aligned and general agents.; Drive research and engineering initiatives that push the frontier of post-training, from data curation to large-scale optimization.; Develop data generation pipelines, reward models,…
Reflection · San Francisco, California, United States +2
On-siteFull-timeLead / staffEngineeringReflection's Shared Services team builds and operates the shared services that power our research, training, and production environments the systems multiple teams depend on for model development, deployment, and evaluation. Sharding, replication, coordination, high-concurrency…
Reflection · San Francisco, California, United States +2
On-siteFull-timeLead / staffEngineeringReflection's Platform Foundations team builds and operates the foundational layer every engineering team depends on — cloud and multi-cloud infrastructure, networking primitives, security guardrails, and developer tooling. The team defines the opinionated golden paths that make…
Reflection · San Francisco, California, United States +2
On-siteFull-timeLead / staffData & AIData is playing an increasingly crucial role at the frontier of AI innovation. Many of the most meaningful advances in recent years have come not from new architectures, but from better data.
Research Program Manager - Model Development
6 months agoReflection · New York, United States +2
On-siteFull-timeSeniorScience & researchResearch Program Managers at Reflection are high-leverage leaders and operators who embed directly with research and engineering teams to accelerate the pace of frontier model development. They are not project trackers. They are force multipliers who bring clarity to ambiguity,…
Reflection · New York, United States +2
On-siteFull-timeSeniorEngineeringResearch Program Managers at Reflection are high-leverage leaders and operators who embed directly with research and infrastructure teams to accelerate the pace of frontier model development. They are not project trackers. They are force multipliers who bring clarity to…
Member of Technical Staff - Pre-Training Infra
7 months agoReflection · San Francisco, California, United States +2
On-siteFull-timeLead / staffScience & researchBuild and scale distributed training systems that power frontier model pre-training.; Work closely with research teams to design and operate large-scale training runs for foundation models.; Develop infrastructure that enables efficient training across thousands of GPUs using…
Member of Technical Staff - Compute Platform
7 months agoReflection · New York, United States +2
On-siteFull-timeLead / staffEngineeringReflection’s Compute Platform team specializes in keeping our compute layer healthy and highly available. We run a K8s-based platform distributed across multiple neo-clouds. We manage multi-cloud scheduling, node health, and performance debugging at this scale presents…
Member of Technical Staff - Applications
8 months agoReflection · New York, United States +2
On-siteFull-timeLead / staffEngineeringReflection AI is an equal opportunity employer. We do not discriminate on the basis of race, color, religion, sex (including pregnancy), sexual orientation, gender identity or expression, national origin, ancestry, age, marital status, disability, genetic information, veteran…
Member of Technical Staff - Platform Foundations
8 months agoReflection · New York, United States +2
On-siteFull-timeLead / staffEngineeringReflection AI is an equal opportunity employer. We do not discriminate on the basis of race, color, religion, sex (including pregnancy), sexual orientation, gender identity or expression, national origin, ancestry, age, marital status, disability, genetic information, veteran…
Member of Technical Staff - Safety
9 months agoReflection · San Francisco, California, United States +2
On-siteFull-timeLead / staffScience & researchOwn the red-teaming and adversarial evaluation pipeline for Reflection’s models, continuously probing for failure modes across security, misuse, and alignment gaps.; Work hand-in-hand with the Alignment team to translate safety findings into concrete guardrails, ensuring models…
Reflection · San Francisco, California, United States +2
On-siteFull-timeLead / staffData & AIData is playing an increasingly crucial role at the frontier of AI innovation. Many of the most meaningful advances in recent years have come not from new architectures, but from better data.
Updated 07 Nov 2026 10:21 UTC from the OptiTalent job library.