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Science jobs in United Kingdom
7 open roles read nightly from companies’ own hiring pages. Each one links to the original ad.
1–7 of 7 jobs
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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 - 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,…
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,…
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 - 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…
Member of Technical Staff - Evaluations
10 months agoReflection · San Francisco, California, United States +2
On-siteFull-timeLead / staffScience & researchConduct critical comparative analysis to advance our understanding of model capabilities; Build and refine evaluation systems and processes that create tight feedback loops between data, evals, and model behavior; Develop generalizable evaluation frameworks that capture what…
Member of Technical Staff - Pre-Training
13 months agoReflection · San Francisco, California, United States +2
On-siteFull-timeLead / staffScience & researchResearch and build solutions across algorithms, scaling laws, data processing, optimizers, and model architecture.; Design and run scientific experiments to advance our understanding of scaling large language models and data efficiency.; Implement state-of-the-art methods from…
Updated 07 Nov 2026 10:21 UTC from the OptiTalent job library.