Jobs in London

Principal/Staff Software Engineer

Work on core enterprise platform systems and new API development for Synthesia's AI video platform, ensuring security, scalability, and reliability. Own complex, long-term projects across multiple teams, translating business and regulatory requirements into robust technical solutions. Collaborate closely with product, security, and infrastructure teams while leveraging observability to maintain system health and compliance.

Synthesia United Kingdom US$200,000 pa

On-site Permanent

Senior Data Scientist - Product Data

Synthesia is the world’s leading AI video platform for business, used by over 90% of the Fortune 100. Founded in 2017, the company is headquartered in London, with offices and teams across Europe and the US.As AI continues to shape...

Synthesia London, United Kingdom

Hybrid Permanent

Senior ML Engineer, Doc Fraud

This role involves building and optimizing production-scale machine learning systems for document classification and extraction, with a focus on fraud detection and identity verification. The engineer will work on LLM/ML pipelines, from training and evaluation to deployment and inference optimization, ensuring high accuracy and performance across global document types. Collaboration with cross-functional teams and mentorship of junior engineers are key aspects of the position.

Entrust

Hybrid

VP of Applied Science

Lead and scale a team of applied scientists focused on AI-driven identity verification and fraud detection. Drive technical strategy from research to production, ensuring models are robust, fair, and aligned with business metrics. Collaborate across product, engineering, and customer teams to shape identity security solutions with real-world impact.

Entrust London, United Kingdom

Hybrid Permanent

Security Engineer

This role involves a 12-week training programme in threat detection and incident investigation using the Darktrace platform, followed by hands-on work on the Cyber AI Analyst product. You'll develop AI-driven hypotheses to automate security analysis across networks, email, and cloud environments, collaborating with machine learning and software engineering teams to research, deploy, and refine detection models based on real-world feedback.

Darktrace Cambridge, CB2 3BJ, United Kingdom

Hybrid Permanent

Account Executive

Darktrace is a global leader in AI for cybersecurity that keeps organizations ahead of the changing threat landscape every day. Founded in 2013, Darktrace provides the essential cybersecurity platform protecting nearly 10,000 organizations from unknown threats using its proprietary AI....

Darktrace Poland

Payroll Assistant

Thought Machine's mission is bold – to properly and permanently rid the world's banks of legacy technology. To achieve this, we have developed the foundations of modern banking through core and payments technology which run natively in the cloud. What...

Thought Machine London, United Kingdom

On-site Permanent

ML Runtime Engineer (Mid-Level and Senior)

Develop and optimize the ML runtime stack for AI accelerators, integrating with open-source frameworks like PyTorch, vLLM, and SGLang. Work closely with hardware and ML teams in a co-design environment to deliver high-performance inference solutions. Build low-level systems in Rust while contributing to the full software stack for next-generation AI hardware.

Fractile London, United Kingdom

Hybrid Permanent

ML Runtime Engineer (Mid-Level and Senior)

Develop and optimize the ML runtime stack for AI accelerators, integrating with open-source frameworks like PyTorch and vLLM. Work closely with hardware and software teams in a co-design environment to enable high-performance inference. Build low-level systems in Rust and contribute to cutting-edge AI infrastructure.

Fractile Bristol, United Kingdom

Hybrid Permanent

Associate Director, Data Engineering

Lead the development and strategy of a unified data platform integrating wet and dry lab data to support drug discovery. Manage data engineering teams, optimize scientific compute pipelines using Nextflow and Seqera, and ensure FAIR data principles with strong governance and lineage. Operate in a highly interdisciplinary environment bridging biology, machine learning, and engineering.

Relation Therapeutics London, United Kingdom

On-site Permanent

Senior Scientist, Model Systems

The role involves developing and optimising robust mono- and co-culture models using human primary cells for high-throughput functional genomics studies in fibrotic disease. The scientist will automate perturbation screens, apply multimodal readouts including transcriptomics and proteomics, and work closely with cross-functional teams in a tech-driven biotech environment. Key responsibilities include assay development, imaging analysis, and integration of new technologies to advance target discovery.

Relation Therapeutics London, United Kingdom

On-site Permanent

Data & AI Engineer

This role involves building scalable data platforms to support AI systems, with a focus on data ingestion, transformation, and integration for advanced analytics and LLM-powered applications. You'll work with JSON, DataFrames, and REST APIs to prepare complex datasets for retrieval-augmented generation, semantic search, and scenario modelling. The position requires strong Python and data engineering skills within an AI-driven enterprise environment.

FDM London, United Kingdom £50,000 – £70,000 pa

Hybrid Contract

Senior Back End Engineer I

Develop and scale secure, high-performance microservices for a cloud-native banking platform, taking ownership from requirements to deployment. Collaborate across teams to deliver configurable, client-focused solutions for global financial institutions. Work in a fast-paced engineering culture emphasizing best practices, automation, and full lifecycle ownership.

Thought Machine Lisbon, Portugal

On-site Permanent

Senior AI/ML Engineer (LLM's / RAG Pipeline Development)

This role involves hands-on development and deployment of LLM-based applications into production environments. The Senior AI/ML Engineer will bridge the gap between advanced AI/ML and production-grade software, working in a newly formed R&D team to influence how AI capabilities are embedded into existing and new products. The role offers opportunities for leadership and growth within a fast-growing, market-leading company.

HAYS Specialist Recruitment Guildford, United Kingdom £85,000 – £125,000 pa

On-site Permanent

Contracts Manager, EMEA

About AnthropicAnthropic’s mission is to create reliable, interpretable, and steerable AI systems. We want AI to be safe and beneficial for our users and for society as a whole. Our team is a quickly growing group of committed researchers, engineers,...

Anthropic London, United Kingdom