Cohere

Senior Member of Technical Staff, Safety and Security for Agents at Cohere (London, United Kingdom)

Cohere· London, United Kingdom·

Role details

Work type
Hybrid
Employment
Full-Time
Skills
PythonPyTorchTensorFlowJAXMachine LearningLarge Language ModelsStatistical AnalysisSoftware EngineeringData CollectionExperimental Design
Benefits

Weekly Lunch Stipend · Full Health And Dental Benefits · Mental Health Budget · 100% Parental Leave Top-Up For Up To 6 Months · Personal Enrichment Benefits · Co-Working Stipend · 6 Weeks Of Vacation

Cohere at a glance

Enterprise AI company building secure, privately deployable foundation models and an agentic workspace (North) for regulated businesses.

Cohere builds enterprise-grade AI foundation models (generation, embedding, reranking, and speech) plus North, a turnkey AI workspace, all designed to run privately inside a customer's own cloud or on-prem environment. Its whole differentiator is data sovereignty: enterprises deploy and customize the models without their data ever leaving their control.

~$1.5B raised · latest: Series D extension · $100M · Sept 2025 (following $500M at $6.8B in Aug 2025) · backed by Radical Ventures, Inovia Capital, AMD Ventures, NVIDIA

Summary

Develop safety mechanisms for Large Language Models through data generation, post-training algorithms, and evaluation methods. Collaborate with cross-functional teams to ensure models are trustworthy, secure, and fair while working with human annotators.

Job description

Who are we?

Cohere is the leading security-first enterprise AI company. We build cutting-edge foundation AI models and end-to-end products that are designed to solve real-world business problems.

We’re training and deploying frontier models for enterprises who are building AI systems. We believe that our work is instrumental to the widespread adoption of AI and we are looking for folks that want to be part of that.

We obsess over what we build. Each one of us is responsible for contributing to increasing the capabilities of our models and the value they drive for our customers. Cohere is a team of researchers, engineers, designers, and more, who are all passionate about their craft.

We are a global technology company headquartered in Toronto with key offices in London, New York City, San Francisco, Montreal, Paris, Berlin and Seoul. Join us!

Role Overview:

As a Member of Technical Staff in the Safety for Agents team, you will make a meaningful impact on the development of better, fairer, more trustworthy, and more secure Large Language Models (LLMs). Your primary focus will be on data generation, post-training algorithms, and evaluation methods to ensure Safety in the next generation of models that can access external resources and take actions in the world. You will work closely with other cross-functional machine learning teams and data annotation teams, and will also collaborate with product and policy teams.

This role combines expertise in machine learning, ethical and responsible AI, experimental design, and data generation and management.

It will require curiosity to tackle totally new scientific problems, engineering skills to implement the pieces we need to test solutions to these, and a desire to dive into messy data and results. You will be on a small team with a lot of autonomy and decision-making power, responsible for making the next generation of LLMs better for society as a whole.

Please Note: The existing team work in offices in London, Edinburgh, Paris, Toronto, and New York, but we also embrace being remote-friendly! For this role you need to have ~50% working day overlap with UK/EU timezone (e.g. US East is fine) but there are otherwise no restrictions on where you can be located for this role.

Key responsibilities:

  • Strong statistical skills and experience evaluating scientific experiments related to data collection and model performance.
  • Extremely strong software engineering skills.
  • Strong expertise in designing and conducting data collection tasks, including working with human annotators.
  • Experience analyzing datasets with respect to their quality, biases, and suitability for training ML models.
  • Hands-on experience training large language models (LLMs) on distributed training infrastructures.
  • Familiarity with evaluating and improving the generalizability and robustness of ML systems.
  • Proficiency in programming languages such as Python and ML frameworks (e.g., PyTorch, TensorFlow, JAX).
  • Excellent communication skills to collaborate effectively with cross-functional teams and present findings.
  • One or more papers at top-tier venues (such as NeurIPS, ICML, ICLR, AIStats, MLSys, JMLR, AAAI, Nature, COLING, ACL, EMNLP).

Working Location: This role can be based remotely or from one of our office locations listed on the job description - there is no minimum in-office qualification requirement. We care most about hiring exceptional people regardless of locations, though please check the location listed on the posting for guidance around the core time zone or working hours alignment expected for the role.

FULL-TIME EMPLOYEES AT COHERE ENJOY THESE PERKS:

  • A weekly lunch stipend of $75/£75 or equivalent in your local currency for lunch.
  • Full health and dental benefits, including a separate budget for mental health.
  • RRSP matching, 401K, Pension Scheme.
  • 100% Parental Leave top-up for up to 6 months, for either parent.
  • Annual enrichment benefits:

Arts & culture, fitness/wellness, quality time, and a workspace improvement credit.

Education & learning stipend for conferences, courses, and coaching.

  • 6 weeks of paid vacation (30 working days!)
  • Budget for traveling to other offices if you are remote, plus an annual company offsite.

HOW AND WHERE WE WORK:

  • Cohere is remote-friendly, but we also have offices in Toronto, London, New York City, San Francisco, Montreal, Paris, Berlin and Seoul with more opening soon.
  • For those in the office: a daily lunch program, plenty of snacks, and regular community and social events.
  • For those not near an office: a co-working benefit so you can work alongside others in your city.
  • Everyone receives a $500 home office stipend to set up your workspace properly.

If any of the above doesn’t line up exactly with your experience, we still encourage you to apply.

We strive to create an inclusive work environment for all; we welcome applicants from all backgrounds and are committed to providing equal opportunities. Should you require any accommodations during the recruitment process, please submit an Accommodations Request Form docs.google.com/edit, and we will work together to meet your needs.

We may use AI-enabled tools to screen and assess applicants against the criteria for this position. This helps our recruiters identify potentially qualified candidates, but it doesn't limit the applications our recruiters may review or consider.

Beware of Scams: Cohere will never ask for payment or third-party services (e.g., CV writing) as part of our hiring process. All legitimate roles are listed on the Cohere careers page and LinkedIn only, with all communications from Cohere employees coming from an @cohere.com or @cw.cohere email alias. If jobs are viewed on other sites then please verify these through our official careers cohere.com/careers page.

Why work at Cohere

  • Culture: “Flexible, collaborative, and built on trust.” Values of Autonomy, Openness, and Momentum.
  • Remote/hybrid: Globally dispersed company that supports remote work; employees can work from anywhere. Offices in seven cities with catered lunches, snacks, and social events. Teams have budgets for offsite gatherings.
  • Benefits:
    • Six weeks’ paid vacation
    • Equity/stock options (all co-owners)
    • Retirement benefits
    • Six months fully paid parental leave (including adoption/surrogacy)
    • Medical, health insurance, vision, travel coverage (varies by location)
    • Mental health provider access
    • Fertility/family planning financial support
    • Monthly fitness/wellness allowance
    • $2,000 annual education benefit for conferences/courses
    • Annual arts & culture allowance
    • Monthly quality time allowance
    • One-time workplace improvement stipend for home office
    • Monthly co-working benefit for remote employees
    • Weekly meal stipend for remote workers
  • Interview process: Clear and collaborative – application review, recruiter conversation, take-home assignment, hiring manager, final team rounds. Video conference-friendly.

Application questions