Technical Staff Member - International Government Initiatives

About ApturaAptura specializes in creating evaluation datasets and reinforcement learning (RL) environments that enhance the reliability of AI across high-stakes sectors such as finance, healthcare, and legal domains. Our dedicated team curates expert training data, develops calibrated evaluation rubrics, and constructs verifiable task environments tailored for AI labs and startups that are innovating within regulated industries.As a compact and agile team based in London, we prioritize speed and take our work seriously. Each team member plays a crucial role, where initiative is celebrated, and ownership is a fundamental expectation. If you aspire to influence how advanced AI systems learn to function in real-world applications, we encourage you to apply.About the RoleIn the role of a Technical Staff Member on our Applied AI team, you will create the tasks and environments essential for AI labs to train and assess their agents across finance, healthcare, and legal sectors.Your daily responsibilities will include constructing RL environments using spreadsheets, documents, and professional workflows. You will develop verification logic and reward functions, collaborating closely with domain experts to define the criteria for accurate responses in complex models such as leveraged buyouts or clinical notes. Your work may oscillate between engineering and research, but the unifying objective is to deliver the ground truth against which leading models are evaluated.What You'll DoDevelop RL environments tailored to the finance, healthcare, and legal sectors.Collaborate in creating tasks with definitive answers, calibrated evaluation criteria, and automated reward signals.Design verification logic and reward functions to differentiate between effective and ineffective model outputs.Engage with domain experts (investment analysts, healthcare professionals, attorneys) to convert intricate professional workflows into structured tasks.Prototype innovative methods for evaluation, verification, and synthetic data generation.Who We're Looking ForHands-on experience with large language models (LLMs): including prompting, evaluation, and agentic harnesses. You have developed functional systems instead of merely theoretical models.High initiative and technical proficiency. You don’t wait for permission, specifications, or a detailed plan. You identify what needs to be accomplished, determine how to achieve it, and execute effectively.Ability to adapt to varied contexts. Your role will involve switching between engineering tasks, evaluation design, and close collaboration with domain experts frequently within a single day.You are proactive in shipping and iterating. In our small team, there’s no room for work that remains in limbo.

Technical Staff Member - Applied AIExciting Opportunity Awaiting YouWe are seeking a talented Member of Technical Staff specializing in generative modeling to bridge the gap between our cutting-edge models and the clients who rely on them. You will be a part of a diverse team comprising machine learning experts, protein engineers, and biologists, all collaboratively working to revolutionize biological control and disease treatment. In this role, you will gain a thorough understanding of our proprietary generative models and leverage that expertise to adapt, deploy, and optimize these models in client environments, especially within the pharmaceutical and biotech industries.This is a hybrid position requiring a research-oriented mindset coupled with excellent communication skills to effectively translate complex concepts into practical production systems that yield scientific benefits for our partners.About Latent LabsAt Latent Labs, we are committed to developing pioneering models that grasp the fundamentals of biology. Our ambitious goals are driven by curiosity and an unwavering commitment to scientific excellence. Our team previously contributed to the award-winning AlphaFold project at DeepMind, invented latent diffusion, and established groundbreaking lab data management and high-throughput protein screening systems. At Latent Labs, you'll collaborate with some of the brightest minds in generative AI and biology.We foster an environment of interdisciplinary exchange, continuous learning, and collaboration. Our offsite team-building activities promote a culture of trust across our London and San Francisco offices.We are looking for innovative thinkers who are passionate about solving complex challenges and making a positive global impact. Join us on our ambitious mission!

About MentisAt Mentis, we specialize in developing evaluation datasets and reinforcement learning environments that ensure AI reliability in high-stakes sectors such as finance, healthcare, and legal. Our dedicated team curates expert training data, establishes precise rubrics, and creates verifiable task environments for AI laboratories and startups that aim to push the boundaries of model capabilities within regulated industries.As a dynamic, close-knit team based in London, we pride ourselves on our ability to adapt quickly and tackle challenges with seriousness. Every team member plays a direct role in our projects, and we value initiative and ownership as key components of our work culture. If you're interested in influencing how cutting-edge AI learns to function in real-world scenarios, we would love to hear from you.About the RoleAs a Member of the Technical Staff within our Applied AI team, your primary focus will be on creating the tasks and environments utilized by AI labs to train and assess their agents across finance, healthcare, and legal domains.Your daily responsibilities will include: designing reinforcement learning environments around documents, spreadsheets, and professional workflows; developing verification logic and reward functions; collaborating with domain experts to define what constitutes a correct response in various scenarios, such as an LBO model or clinical notes. This role will involve both engineering and research activities, with the common goal of producing the ground truth against which advanced models are evaluated.What You'll DoDevelop reinforcement learning environments across finance, healthcare, and legal sectors.Contribute to the design of tasks featuring definitive answers, calibrated rubrics, and programmatic reward signals.Implement verification logic and reward functions to differentiate between effective and ineffective model outputs.Engage directly with domain experts (investment analysts, physicians, attorneys) to convert intricate professional workflows into structured tasks.Innovate new methods for evaluation, verification, and synthetic data creation.Who We're Looking ForHands-on experience with large language models (LLMs), including prompting, evaluation, and agent integration. You’ve developed systems that function effectively, not just theoretical models.Demonstrated initiative and technical proficiency. You proactively identify needs, determine solutions, and execute them without waiting for directives.Adaptability to work in diverse contexts. Your role will frequently involve shifting between engineering, evaluation design, and collaborative work with domain experts.A commitment to delivering and refining outputs. In our small team, we prioritize action over prolonged review processes.

Join xai as a Technical Staff Member focusing on Model Training. In this role, you will collaborate with a talented team to develop and optimize machine learning models that drive innovative solutions. Your expertise will contribute to enhancing the performance of our systems and delivering impactful results.

Join Cohere as a valued member of our technical staff, focusing on the safety of our agents. In this critical role, you will be responsible for designing, implementing, and maintaining safety protocols that ensure the integrity and security of our systems. Collaborate with cross-functional teams to develop innovative solutions that enhance agent safety and improve operational efficiency.

Pleo creates tools that simplify business spending for finance teams and employees. With over 40,000 customers and a diverse team of more than 850 people from 100+ nationalities, the company continues to grow and refine how organizations manage expenses. Curiosity about customer needs, a drive to untangle complexity, and high standards shape the way work gets done at Pleo. Role overview The Staff Applied AI Engineer will play a key part in building the next wave of AI-powered features at Pleo. This position focuses on using rich spend data to deliver meaningful product improvements. Collaboration is central: expect to work closely with software engineers, data engineers, and data scientists to move prototypes into production and create real value for customers. Team structure and collaboration This role is part of the data team, which includes a Staff Data Platform Engineer and a Staff Data Scientist. Each member brings specialized expertise. The Staff Applied AI Engineer’s primary responsibility is applied AI engineering and contextual data analysis. The position reports to the Director of Data Product and works with multiple product squads to help shape and launch AI-driven features across Pleo. What you will do Partner with product engineers and data experts to design and build AI-driven products, including spend intelligence tools, automated processes, and agentic workflows. Work with cross-functional teams to integrate AI capabilities into new and existing products, aiming for smooth adoption and practical value.

Location: LondonCompany: H About H H is focused on building agentic AI that automates complex, multi-step tasks typically handled by people. The company’s goal is to help individuals achieve more by creating superintelligent systems that work safely and responsibly. H values openness, continuous learning, and collaboration. Every team member’s input matters here. About the Models Team The Models team develops the core models that power H’s agentic AI technology. This group works on training methods to boost model performance and efficiency, especially for agent-driven applications where inference costs matter. Projects span Large Language Models (LLMs) and Vision-Language Models (VLMs), enabling agents to interpret and interact with complex environments. Team members refine these models using advanced training approaches, including reinforcement learning and reward modeling. The focus is on better instruction following, tool use, and dynamic interaction. The team’s work bridges research and product, turning new research into practical solutions that move AI forward. Who Hires Here H seeks exceptional AI researchers and engineers from around the world who care about advancing technology safely and responsibly. The company welcomes those eager to shape the future of superintelligent AI alongside a collaborative and driven team.

Who are we?At Cohere, we are committed to harnessing intelligence to benefit humanity. Our mission focuses on training and deploying advanced models for developers and enterprises, empowering the creation of innovative AI systems that drive exceptional experiences in areas like content generation, semantic search, retrieval-augmented generation (RAG), and intelligent agents. We believe our contributions are vital for the widespread integration of AI technologies.We take immense pride in our creations. Each team member is empowered to enhance the capabilities of our models and the value they deliver to our clients. We thrive in a fast-paced environment and prioritize actions that best serve our customers.Cohere comprises a talented team of researchers, engineers, designers, and other specialists who are dedicated to their craft. Our diverse perspectives are crucial for developing exceptional products.Join us in shaping the future of AI!Why is this role important?In this position, you will push the boundaries of model post-training, deploying state-of-the-art models into production while bridging the divide between research and real-world application. With one of the highest compute-to-engineer ratios globally, we foster collaboration between engineering and research, allowing everyone to contribute to production code and support research initiatives based on their interests and organizational needs. You will have access to the resources you need to excel.Please note: We have offices in London, Paris, Toronto, San Francisco, and New York, but we also support a remote-friendly work culture!As a Technical Staff Member, your responsibilities will include:Developing and implementing high-performance, scalable software for model training.Consistently performing post-training of models to achieve state-of-the-art performance.Collaborating with specialized teams (Agentic, Code, etc.) to create models with comprehensive performance metrics.Designing and executing strategies to enhance performance and outcomes during training cycles, including supervised fine-tuning (SFT) and reinforcement learning (RL).Conducting research and experimentation using our advanced supercomputing and data infrastructures.Learning from and collaborating with leading researchers in the AI field.Ideal candidates will possess:Exceptional software engineering capabilities.A strong understanding of machine learning frameworks and tools.Experience in collaborative development and version control systems.A passion for continuous learning and applying innovative solutions.

About xAIAt xAI, we are on a mission to develop advanced AI systems that deeply comprehend the intricacies of the universe while assisting humanity in its quest for knowledge. Our team is compact, highly driven, and dedicated to engineering excellence. We are looking for individuals who embrace challenges and thrive on curiosity. Operating with a flat organizational structure, we encourage all employees to be proactive and contribute directly to our mission. Leadership is awarded to those who demonstrate initiative and consistently achieve high standards. A strong work ethic and effective prioritization skills are essential. Excellent communication skills are expected, enabling team members to share knowledge clearly and concisely.About the PositionAs a Technical Staff Member, you will be responsible for developing frameworks to enhance reasoning capabilities, constructing distributed reinforcement learning systems, and implementing inference time computation techniques (such as tree search and planning). You will also create environments for agents, gaining exposure to a wide range of components across the entire technical stack.Tech StackPythonJAXRustFocus AreasDevelop robust and scalable distributed reinforcement learning systems.Optimize frameworks for complex inference-time reasoning tasks.

About H H is focused on advancing superintelligence by developing agentic AI. The team’s mission is to automate complex, multi-step tasks that typically require human effort, enabling AI agents to extend what people can achieve. H values open collaboration, continuous learning, and responsible progress. The company seeks people who care deeply about building agentic technologies safely and who want to contribute to a culture where every voice matters. About the Agent Team The Agent team shapes new learning algorithms and agent paradigms that move agentic systems forward. Work centers on foundational models and reinforcement learning, with a focus on training artificial general agents. Collaboration with the LLM/VLM and Safety teams is central, as the group explores new research directions together. Role Overview: Technical Staff Member - Research - Agent This position is part of the research team and centers on engineering. The main responsibility: define system architectures and build scalable platforms that underpin research efforts. The work involves turning research ideas into reliable, high-performance systems ready for production, supporting the next wave of agentic AI. Location London

About MentisAt Mentis, we are dedicated to creating reliable AI solutions for critical sectors such as finance, healthcare, and legal. Our team specializes in developing meticulously curated evaluation datasets and reinforcement learning environments. We empower AI labs and startups by providing them with expertly crafted training data, calibrated assessment rubrics, and rigorous task environments to push the boundaries of AI capabilities in regulated industries.As a tight-knit team based in London, we pride ourselves on our agility and commitment to excellence. Every member plays a vital role in our mission, and we value initiative and ownership in our collaborative work culture. If you are passionate about shaping the future of frontier AI applications, we want to hear from you.About the RoleAs a Software Engineer and Member of Technical Staff, you will be instrumental in building and scaling the platform that drives Mentis' operations. You will develop essential annotation tools, workflow systems, quality control pipelines, and internal infrastructure fundamental to every dataset and environment we deliver.Your daily tasks will include designing expert task creation workflows, creating task assignment and review interfaces, developing data pipelines to convert expert outputs into structured training sets, and integrating LLM-powered tools into our product. Your role will vary from product engineering to infrastructure development, with a consistent focus on producing high-quality evaluation data at scale.You will take ownership of the platform's development, making key decisions on what features to build, how to implement them, and establishing the standards for our growth.What You'll DoDevelop and manage the core data annotation and workflow platform from start to finish, overseeing task assignment, expert interfaces, quality control, and dataset delivery.Design systems that facilitate expert onboarding, task routing, review workflows, and scalable quality assurance processes.Enhance AI-integrated pipelines across the platform, including LLM-assisted annotation, automated checks, and model-in-the-loop workflows.Collaborate directly with founders and domain experts to streamline bespoke processes into effective, scalable software solutions.Make informed product and engineering decisions in a dynamic environment, prioritizing and shipping features without waiting for perfect specifications.Contribute to defining our team’s development practices, including tooling choices, engineering standards, and product strategy.Who We're Looking ForWe seek a proactive individual who thrives in fast-paced environments and embraces ambiguity. If you are excited about the opportunity to influence how AI learns and operates in real-world settings, we welcome your application.

About H:H is at the forefront of advancing superintelligence through agentic AI. Our mission is to automate complex, multi-step tasks usually undertaken by humans, empowering AI agents to unlock the full potential of human capabilities.We are on the lookout for the brightest AI minds who are as committed to building safely and responsibly as they are to pushing the boundaries of disruptive agentic technologies. At H, we foster a culture of openness, continuous learning, and collaboration, where every voice contributes to our shared success.About the Team: The Infrastructure team is dedicated to providing seamless access to the necessary infrastructure for our research and engineering teams. We ensure that the foundational infrastructure for our public services is robust, reliable, and scalable, positioning Infra team members to influence every aspect of H, from foundational model development to agent creation and public service delivery.Key Responsibilities:Design and manage infrastructure to support:Research initiatives in model and agent development, including training infrastructure, data pipelines, and inference capabilities.Product engineering efforts on H's agent platform, encompassing client-facing APIs and agent runtimes across multiple deployment scenarios (multi-tenant and on-premises).Establish and maintain observability and monitoring strategies.

About UsAt Cohere, we are on a mission to expand intelligence in a way that benefits humanity. We specialize in training and deploying advanced models for developers and enterprises aiming to create AI systems that deliver extraordinary experiences, including content generation, semantic search, retrieval-augmented generation (RAG), and intelligent agents. We are committed to fostering the widespread adoption of AI technology.We take immense pride in what we create. Each team member plays a vital role in enhancing the capabilities of our models and the value they provide to our customers. We thrive in a fast-paced environment where hard work and customer-centricity lead our decisions.Cohere comprises a dynamic group of researchers, engineers, designers, and creatives who are passionate about their work. Our team members are among the best in their fields, and we believe that diverse perspectives are essential for crafting exceptional products.Join us in shaping the future of AI!Why This Role is ExcitingAs a Member of Technical Staff at Cohere, you will be pivotal in defining and developing the future of AI-driven products. This role provides you with the opportunity to convert groundbreaking research into high-performance products that propel our enterprise forward. You will work directly on North, our comprehensive and secure AI workspace platform, focusing on agent development in RAG, tool utilization, and language agents.We boast one of the highest compute-to-engineer ratios globally, offering an environment where your ideas can thrive and be swiftly brought to market.Please note: We have offices in London, Paris, Toronto, San Francisco, and New York. However, we also support remote work within EMEA-friendly time zones. Our team primarily operates between ET and CET, so we are looking for candidates in locations that align with these hours for effective collaboration.As a Member of Technical Staff, your responsibilities will include:Collaborating with a diverse team of engineers to design, build, and scale AI systems that form the backbone of our suite of developer-centric enterprise products.Contributing directly to North, our all-in-one secure AI workspace platform, where you will lead agent development in RAG, tool usage, and language agents.Rapidly researching and experimenting with innovative ideas on our advanced supercomputer and data infrastructure to keep our products at the cutting edge of the industry.Partnering with leading researchers, engineers, and annotators to generate and evaluate data for post-training large language models (LLMs), ensuring our products are top-notch.

Tessl is an innovative Series A startup headquartered in London, founded by the visionary Guy Podjarny. With over $100M raised from esteemed investors such as Index Ventures, Accel, GV, and Boldstart, we have been recognized among the top players in the industry, ranking #2 in Sifted EU’s B2B SaaS Rising 100 and #20 in Sifted's AI 100 this year.At Tessl, we are on a mission to redefine software development through the power of AI. Our AI Native Developers are pioneering a new approach, defining features, architecture, and workflows through specifications rather than code, effectively guiding the work of AI agents. We are at the forefront of creating a groundbreaking platform that embodies this transformative vision, leading a developer movement and ecosystem.Joining Tessl means becoming an integral part of an early-stage team where you have the chance to influence the future of software creation and maintenance.

About UsAt Cohere, our mission is to amplify intelligence for the benefit of humanity. We are at the forefront of training and deploying advanced models that empower developers and enterprises to create innovative AI experiences, including content generation, semantic search, retrieval-augmented generation (RAG), and intelligent agents. Our work is pivotal in driving the widespread integration of AI technologies.We are passionate about our creations and each team member plays a critical role in enhancing our models' capabilities and the value they deliver to our clients. Our work culture is fast-paced and dedicated to optimizing customer satisfaction.Cohere's diverse team of researchers, engineers, designers, and industry experts share a common passion for excellence. We value a variety of perspectives as essential to crafting exceptional products.Join us on this exciting journey to shape the future of AI!Why Join Our Team?The Next Generation Agents team is pioneering the development of agentic large language models (LLMs) that are being adopted across enterprises via Cohere’s North platform. We are dedicated to exploring innovative modeling techniques that enhance agent capabilities, such as deep research, experiential learning, continual learning, and memory integration. Our empirical research approach focuses on creating solutions that surpass current state-of-the-art methodologies, ensuring added value for our customers.In this role, you will drive the exploration and development of cutting-edge agentic techniques. You'll have the opportunity to create the models that underpin our agentic solutions, including the development of data-generation techniques for post-training (SFT and RL*) for Cohere’s models.Please Note: We maintain offices in London, Paris, Toronto, San Francisco, and New York, and we are committed to a remote-friendly approach! This team primarily collaborates within the ET to CET time zones, so we encourage candidates located in these areas for effective teamwork.As a Technical Staff Member for Next Generation Agents, you will:Design and implement innovative agentic solutionsEnhance existing capabilities on challenging agentic tasksInvestigate the future of online learning and self-improvement techniquesCollaborate with interdisciplinary teams (Reasoning, Post-training, Pre-training, etc.) to boost the performance of agentic systemsConduct empirical research to advance agentic technologies

About NevisNevis is pioneering the first-ever AI-driven wealth management platform, recently surpassing $50 billion in assets under management and projected to exceed $100 billion by year-end.Backed by prominent investors, Nevis has successfully secured $40 million in funding from Sequoia Capital, ICONIQ, and Ribbit, positioning itself as one of Europe’s most well-funded and rapidly expanding Series A startups.The RoleWe are on the lookout for an innovative and passionate Applied AI Engineer to join our dynamic team at Nevis. In this critical role, you will influence the development of our cutting-edge AI wealthtech product by creating LLM-driven automation solutions to tackle essential challenges faced by our corporate clients.You will engage with state-of-the-art LLM models, partnering with industry-leading vendors to enhance our product’s reasoning capabilities and achieve superior quality in our models’ outputs.Working alongside a distinguished team of engineers and product creators, including the ex-Head of AI at Revolut, you will have a unique opportunity to make a significant impact in one of the world’s largest industries.What You’ll DoDesign and develop LLM and ML-powered features for the Nevis platform.Collaborate with engineers and product teams to transition new AI capabilities from concept to production.Establish best practices for AI development, testing, observability, and reliability.Continuously assess and enhance AI product performance and reasoning accuracy.Work in tandem with product and design teams to prototype and refine new AI features.Stay abreast of advancements in Generative AI, including agentic systems and context engineering.Who You AreHands-on experience with LLMs.Demonstrated ability to solve real-world challenges using AI/ML.Strong statistical and data analysis skills.A STEM degree from a leading university.A passion for transformative AI technologies.A product-oriented mindset focused on practical solutions.

Latent Labs is on the lookout for an exceptionally talented Member of Technical Staff to spearhead the creation of innovative reasoning workflows. In this role, you will develop autonomous systems capable of executing intricate scientific tasks through natural language interactions. Your responsibilities will include architecting and deploying reasoning systems that democratize access to pioneering synthetic biology tools, empowering researchers globally to utilize our advanced models via user-friendly chat interfaces.About Us:At Latent Labs, we are dedicated to advancing the frontier of biological understanding through our state-of-the-art models. Our team is driven by curiosity and a commitment to scientific excellence, having previously co-developed DeepMind's Nobel-prize winning AlphaFold, innovated latent diffusion techniques, and crafted groundbreaking lab data management systems along with high-throughput protein screening platforms. Joining Latent Labs means collaborating with some of the brightest minds in generative AI and biology.We foster an environment of interdisciplinary collaboration, continuous learning, and trust, with enriching team offsites bridging our London and San Francisco locations. We seek passionate innovators eager to address complex challenges while maximizing positive global impact. Join us on our ambitious moonshot mission.

About UsAt Percepta, we are dedicated to revolutionizing essential industries through applied AI. Our goal is to harness cutting-edge technology to enhance sectors that drive the global economy, such as healthcare, manufacturing, and energy.To achieve this, we collaborate closely with top-tier clients, facilitating their AI transformation journeys. Our unique strengths include:Expertise in engineering, product development, and research.Mosaic, our proprietary toolkit designed for the swift deployment of intelligent workflows.Strategic alliances with industry leaders like Anthropic, McKinsey, AWS, and more.Our rapidly expanding team comprises Applied AI Engineers, Embedded Product Managers, and Researchers, all driven by the mission to integrate AI into tangible improvements in everyday life.Percepta operates as a direct partnership with General Catalyst, a global transformation and investment firm.Role OverviewWe are seeking Applied AI Engineers to engage with customer executives, operators, and technical teams to devise and implement impactful AI systems. As we expand our footprint in Europe, your role will be pivotal in shaping our strategic direction and success in the region. Unlike many roles that focus on prototypes or laboratory projects, you will be responsible for designing, building, and deploying production-grade AI agents and workflows that generate substantial business value for our clients.Key ResponsibilitiesDefine AI Vision: Partner with client stakeholders to outline their long-term AI strategy and transformation roadmap.Identify Opportunities: Work backward from the long-term vision to highlight and prioritize specific AI applications that translate our ambitions into measurable business outcomes.Deliver Real Products: Quickly develop and deploy AI solutions that operate effectively in real-world scenarios with actual users and data.Enhance Our Core Product: Integrate insights from customer engagements into our Mosaic product, consistently introducing new features, patterns, and frameworks.

Role Overview bluefishai is looking for a Senior Applied AI Engineer to help shape how AI is implemented and integrated across the company. This position focuses on driving projects that improve developer productivity, streamline workflows, and introduce new product capabilities. The work is highly cross-functional and centers on delivering measurable business results. Key Responsibilities Lead initiatives that bring structure and clarity to AI adoption, setting standards for teams as they experiment with new approaches. Work closely with engineering, product, and leadership to identify impactful AI use cases and integrate them into the software development lifecycle. Advise on the application of emerging technologies, including agentic capabilities, to both products and internal processes. Mentor engineers, define best practices, and guide teams in adopting AI solutions that scale across the organization. Encourage collaboration and help align teams around practical, measurable solutions that boost productivity. Collaboration and Reporting This role reports directly to the VP of Engineering. Regular collaboration with engineering, product, and leadership teams is expected to ensure AI initiatives are impactful and aligned with business goals. Work Environment bluefishai is in the early stages of its AI journey, with a strong sense of curiosity and momentum. Teams are experimenting with different methodologies, and this role will be central in establishing effective, scalable AI practices across the company. Location This position is based in London or can be performed remotely within the UK.