OpenAI · London, UK · Onsite · Jan 23
Build failure detection and tracing for training on massive custom supercomputers.
Salary not listed
Software EngineeringAll jobs
London
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975 open roles
Anthropic · London, UK · Onsite · Jan 21
Build foundational systems powering safety, oversight and intervention for AI.
GBP 325k–GBP 395k
Safety ResearchHarvey AI · London · Remote · Jan 14
Own value realization for top enterprises and leading law firms.
Salary not listed
Customer SuccessReflection AI · San Francisco, CA +2 · Onsite · Jan 13
Own red-teaming and adversarial evaluation pipeline for open models.
Salary not listed
Safety OperationsDatabricks Mosaic · Remote - United Kingdom +1 · Remote · Jan 12
Own and grow Databricks' public sector business across Ireland and Scotland.
Salary not listed
Account ManagementReflection AI · San Francisco, CA +2 · Onsite · Jan 8
Own upstream data quality for LLM pre-training across languages and modalities.
Salary not listed
Data AcquisitionReflection AI · San Francisco, CA +2 · Onsite · Jan 8
Own data quality for LLM post-training shaping agentic tool use and reasoning.
Salary not listed
Data AcquisitionSierra · London · Onsite · Jan 6
Own full-cycle recruiting for engineering, product, data, and infrastructure roles.
GBP 135k–GBP 185k
People and CultureSierra · London · Onsite · Jan 6
Own full-cycle recruiting for engineering, product, data and infrastructure roles.
GBP 135k–GBP 185k
People and CultureReflection AI · San Francisco, CA +2 · Onsite · Dec 2025
Build evaluation frameworks capturing reasoning, alignment and usefulness.
Salary not listed
EvaluationsCohere · London +5 · Remote · Dec 2025
Ensure quality and reliability of frontier large language models for enterprise.
CAD 250k–CAD 535k
Research ScientistsAnthropic · London, UK · Onsite · Dec 2025
Safeguard AI systems and maintain trust of users and society at large.
GBP 255k–GBP 325k
Security EngineeringSierra · London · Onsite · Dec 2025
Build and ship production-grade AI agents for finance, healthcare, and commerce.
GBP 150k–GBP 315k
Applied ML EngineeringSierra · London · Onsite · Dec 2025
Design and ship production AI agents that drive revenue for global brands.
GBP 150k–GBP 315k
Applied ML EngineeringSierra · London · Onsite · Dec 2025
Build and ship production-grade AI agents for finance, healthcare and commerce.
GBP 150k–GBP 315k
Applied ML EngineeringSierra · London · Onsite · Dec 2025
Build and ship production-grade AI agents for finance, healthcare and commerce.
GBP 150k–GBP 315k
Applied ML EngineeringSierra · London · Onsite · Dec 2025
Build enterprise-grade AI agents handling thousands of customer conversations daily.
GBP 150k–GBP 315k
Product ManagementSierra · London · Onsite · Dec 2025
Build enterprise AI agents handling thousands of customer conversations daily.
GBP 150k–GBP 315k
Product ManagementSierra · London · Onsite · Dec 2025
Build enterprise AI agents handling thousands of customer conversations daily.
GBP 150k–GBP 315k
Product ManagementSierra · London · Onsite · Dec 2025
Build enterprise-grade AI agents handling thousands of customer conversations daily.
GBP 150k–GBP 315k
Product ManagementSierra · London · Onsite · Dec 2025
Own AI agents from pilot to production handling thousands daily.
GBP 150k–GBP 245k
Strategy and OperationsSierra · London · Onsite · Dec 2025
Own AI agents from pilot to production handling thousands of chats daily.
GBP 150k–GBP 245k
Strategy and OperationsSierra · London · Onsite · Dec 2025
Own AI agents from pilot to production handling thousands of chats daily.
GBP 150k–GBP 245k
Strategy and OperationsSierra · London · Onsite · Dec 2025
Own AI agents from pilot to production handling thousands of daily conversations.
GBP 150k–GBP 245k
Strategy and OperationsSierra · London · Onsite · Dec 2025
Own AI agents from pilot to production handling thousands of chats daily.
GBP 150k–GBP 245k
Strategy and OperationsSierra · London · Onsite · Dec 2025
Own AI agents from pilot to production handling thousands of chats daily.
GBP 150k–GBP 245k
Strategy and OperationsPerplexity AI · San Francisco +4 · Remote · Dec 2025
Build AI-driven security agents that improve detection and response.
$220k–$405k
Software EngineeringCohere · Toronto +4 · Remote · Nov 2025
Build the synthetic data pipeline powering Cohere's advanced language models.
CAD 250k–CAD 535k
Research ScientistsDatabricks Mosaic · London, United Kingdom +1 · Onsite · Nov 2025
Own core write-path operations for Delta Lake behind the Lakehouse.
Salary not listed
Software EngineeringH Company · Hybrid Paris +1 · Remote · Nov 2025
Build foundational LLMs and VLMs powering cutting-edge agentic technology.
Salary not listed
Post-Training Research