Developpeur Python Python Developer in London

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! About the Role We're seeking a Senior/Staff Engineer to build and maintain the automation infrastructure that powers the development cycles of our North platform. This engineer will design and implement robust automation systems that enable engineers to efficiently test and validate changes across diverse environments and configurations. This role sits at the intersection of infrastructure and standards. You'll build the systems, frameworks, and culture that allow the rest of engineering to own quality themselves; improving and extending our testing platform by creating the infrastructure that allows engineers to write and execute tests, and enable every engineering team to ship with more confidence. Key Responsibilities Design and implement automation pipelines that support comprehensive testing across multiple environments with varying feature flags and realistic customer data profiles Create intelligent testing agents that simulate real user behavior to validate different configuration combinations Develop and maintain GitHub workflows and actions to automate testing, deployment, and validation processes Manage and optimize H

About the Team ChatGPT relies on a large and growing GPU fleet to serve inference workloads reliably and efficiently. We develop the systems and tools that make it possible to introduce new models, manage production deployments, respond to operational issues, and use infrastructure effectively at scale. Our work spans distributed systems, platform engineering, infrastructure automation, and developer experience. We partner closely with research, infrastructure, and product teams to make model deployment more reliable, more efficient, and easier to manage. About the Role We are looking for a software engineer with experience building or operating large-scale production systems. You will design and develop systems that support the model lifecycle in production, including deployment orchestration, configuration management, operational automation, reliability, and capacity management. You will help transform complex operational processes into scalable platform capabilities that enable teams across OpenAI to deploy and manage models with greater confidence and less manual effort. This role is a good fit for engineers who enjoy solving complex operational problems and building software that makes production infrastructure easier to run at scale. In This Role, You Will Build and evolve the platform used to deploy, configure, and manage models across ChatGPT. Develop systems for deployment orchestration, model rollouts, operational visibility, and production readiness. Create abstractions and tooling that simplify complex infrastructure and improve the developer experience. Automate operational workflows, including incident detection, diagnosis, mitigation, and recovery. Improve the reliability, scalability, and efficiency of model deployments and the infrastructure that supports them. Build systems that support capacity planning, resource allocation, and infrastructure utilization. Partner with research, infrastructure, and product engineering teams to identify common chal

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! As a Senior Security Operations Engineer you will: Serve as trusted advisor to team’s leadership and partner teams by clearly articulating business risks associated with security issues Harden our cloud-native environments (AWS, OCI, GCP) by introducing secure by default designs and features into network, tooling, and processes Own and drive resolutions for enabling engineers to design, build, and use infrastructure securely at scale by deploying secure architectures using infrastructure-as-code and reusable code libraries Manage IAM / RBAC for cloud infrastructure, and partner with IT on streamling authentication/authorization to ensure unified access control across the board Deploy and operationalize some of the security services and tools (eg: SIEM, SOAR, domain monitoring, endpoint tooling, cloud security tooling) Respond to security incidents and harden environments post-incidents. Support control monitoring and remediation for compliance initiatives Gather and analyze security metrics to address security issues with cross-team dependencies Be a problem solver who is empathetic to developer concerns and will employ construc

🚀 About WRITER WRITER is where the world's leading enterprises orchestrate AI-powered work. Our vision is to expand human capacity through superintelligence. And we're proving it's possible – through powerful, trustworthy AI that unites IT and business teams together to unlock enterprise-wide transformation. With WRITER's end-to-end platform, hundreds of companies like Mars, Marriott, Uber, and Vanguard are building and deploying AI agents that are grounded in their company's data and fueled by WRITER's enterprise-grade LLMs. Valued at $1.9B and backed by industry-leading investors including Premji Invest, Radical Ventures, and ICONIQ Growth, WRITER is rapidly cementing its position as the leader in enterprise generative AI. Founded in 2020 with office hubs in San Francisco, New York City, Seattle, Austin, Chicago, and London, our team thinks big and moves fast, and we're looking for smart, hardworking builders and scalers to join us on our journey to create a better future of work with AI. 📐 About the role This is where security meets innovation at enterprise scale. As a security engineer, applications at WRITER, you'll be building the security foundations that protect the AI systems powering some of the world's most recognizable brands. You'll work at the intersection of application security, AI infrastructure, and developer enablement—partnering with engineering teams to embed security into every line of code while ensuring our platform remains both powerful and trustworthy. The opportunity is massive: you'll help define how enterprise AI applications are secured, from threat modeling our LLM architectures to building automated security controls that scale across our growing platform. This isn't about saying "no"—it's about finding creative ways to say "yes, and here's how we do it securely." You'll tackle challenges that most security engineers never encounter: securing AI agents, protecting training data pipelines, and designing controls for systems that didn

About Yondr Yondr is a disruptor. We challenge convention and simplify complexity. A global developer, owner operator and service provider of data centers, we deliver complex data center capacity needs for the world’s largest tech companies. Our exponential growth sees us looking for extraordinary people to help accelerate us towards our vision: a tomorrow without constraints. But we can’t do this without you. About the Role Yondr Group, a global developer, owner and operator of hyperscale data centres, is seeking an experienced lawyer to support its growing EMEA business. Reporting to the Legal Director EMEA, the successful candidate will act as the primary legal adviser to Yondr's design, construction and operations teams across the EMEA region. The role will support the full project lifecycle, from development, procurement and financing through construction, completion and operations. The successful candidate will work closely with project delivery, commercial, procurement and operational teams, supporting projects involving a range of delivery models, funding structures and stakeholders, including customers, lenders, investors, contractors, consultants, utility providers and suppliers. The role will be expected to operate independently on day-to-day matters, leading legal support across Yondr's EMEA construction and operations portfolio whilst managing legal risk and stakeholder requirements. This includes ensuring project documentation appropriately reflects contractual, leasing, funding and other stakeholder requirements. Minimum Qualifications Qualified solicitor with 6+ years' PQE with significant experience in primarily non-contentious construction, infrastructure, energy or data centre projects (preferred). Have trained at a reputable law firm or within the legal function of a reputable data centre, construction, infrastructure, energy or technology business. Experience negotiating and managing com

About Yondr Yondr is a disruptor. We challenge convention and simplify complexity. A global developer, owner operator and service provider of data centers, we deliver complex data center capacity needs for the world’s largest tech companies. Our exponential growth sees us looking for extraordinary people to help accelerate us towards our vision: a tomorrow without constraints. But we can’t do this without you. About the Role With continued growth across our business, we are actively seeking to have a new member join our team. This is an exciting role to join an existing group of skilled development and investment professionals, enhancing the team capabilities and becoming an integral part of a rapidly growing business. We are searching for someone who has excellent quantitative and analytical skills, is comfortable building financial models and has experience with communicating with internal and external stakeholders. You will be a highly valued and trusted member of our ambitious and hardworking team, in a business that continues to scale to new heights. Main Responsibilities / Take responsibility for development and management of financial models and valuation analysis in support of potential transactions and investment opportunities / Support in all aspects of financing processes included due diligence, project management, data room management, financial analysis, legal negotiations and preparation of materials / Work closely with the Development and Finance teams to perform detailed financial analysis on new developments as well as existing portfolio assets / Production of presentation material for senior management, board members, investors, lenders and joint venture partners / Assist with commercial negotiation of legal contracts for transactions / Research and analysis of market trends and sector / asset valuations / Support in business strategy and individual project delivery /

About Yondr Yondr is a disruptor. We challenge convention and simplify complexity. A global developer, owner operator and service provider of data centers, we deliver complex data center capacity needs for the world’s largest tech companies. Our exponential growth sees us looking for extraordinary people to help accelerate us towards our vision: a tomorrow without constraints. But we can’t do this without you. About the Role A very exciting opportunity for a finance role within the business. The role will provide support in relation to end to end responsibility for operating companies (“OpCos”), including financial reporting and analysis across the business. Main Responsibilities / Perform all related accounting functions associated with OpCos, including account reconciliation and financial statements / Perform monthly variance analysis, identify trends, and make recommendations for improvements / Ensure the accounting policy applied is correct for all entities and consistent per the Group Reporting framework. / Manage various third parties, including auditors and outsourced services. / Interface and collaborate with other departments on monthly draws, cash management, tax filings, along with other items. / Supporting the Group OpCo Financial Controller with any activities as required. / Identify and drive process improvements, including the creation of standard and ad-hoc reports / Actively be visible to the group functions, acting as the go-to contact for the OpCos / Ensure OpCos adhere to the Group Operating Model, including compliance with transfer pricing policies and governance requirements / Act as a key business partner across Finance and the wider organisation to deliver accurate financial reporting, support decision-making and drive process improvements Qualifications and experience / Qualified Accountant (ACA / ACCA / CIMA / CA) / 3-4+ experience of working in a finance role / Strong presentation, analytical skills, p

About Yondr Yondr is a disruptor. We challenge convention and simplify complexity. A global developer, owner operator and service provider of data centers, we deliver complex data center capacity needs for the world’s largest tech companies. Our exponential growth sees us looking for extraordinary people to help accelerate us towards our vision: a tomorrow without constraints. But we can’t do this without you. About the Role The Treasury Accountant is a new role created in a growing Treasury function, responsible for several key processes within Finance. Working with the wider Treasury team, you will analyse Group-wide data, cash flows, oversee intercompany balance (loans, equity) and the documentation thereof, accounting for external debt and implement Finance-wide processes to work towards the continuous improvement of these workstreams, to ensure compliance between our intercompany balances and external facilities. As such, this role involves building relationships and credibility with numerous internal and external stakeholders in a dynamic environment. We have numerous external debt facilities, and over time, this role will acquire responsibilities for various aspects of IFRS 9 accounting, including accounting for interest calculations, utilisations & repayments, new debt & refinancings, and technical hedge accounting and documentation. Main Responsibilities Ownership over intercompany accounting and balances Project managing, whilst working with Finance, Tax and Compliance colleagues, the documenting of intercompany balances Accounting for External debt facilities, including drawdowns, repayments, interest accruals, debt- servicing. Accounting for external hedge relationships Ensuring compliance of

We're looking for a Senior Business Development Representative to join us in a high-impact commercial role at the forefront of Voice AI. You’ll play a critical part in driving pipeline growth across enterprise and mid-market accounts, working with a genuinely differentiated API product used by technical buyers globally. You’ll operate in a fast-scaling environment, partnering closely with account executives and engaging with senior stakeholders. This role is ideal for someone who combines strong sales instincts with a structured, data-driven approach and is motivated to grow within one of the most exciting and rapidly evolving areas of the tech industry. What you’ll be doing: Building and managing pipeline across a defined territory Identifying and targeting enterprise and mid-market accounts Conducting outbound prospecting using multi-channel approaches (email, phone, LinkedIn) Qualifying inbound and outbound leads to create high-quality opportunities Partnering closely with Account Executives to progress and convert opportunities Tailoring messaging to both technical and commercial stakeholders Using tools like Salesforce, sequencing platforms, and LinkedIn Sales Navigator to manage activity and performance Leveraging AI tools to research accounts and personalise outreach Who we are looking for: Demonstrated success hitting or exceeding targets, with clear evidence of performance and impact Brings a methodical, organised approach to territory management and pipeline building Able to confidently engage both technical buyers (e.g. CTOs) and business leaders with tailored messaging Comfortable selling complex or intangible products such as APIs, platforms, or developer tools Ambitious, coachable, and motivated to develop into more senior commercial roles as the company scales We encourage you to apply even if you do not feel you match all of the requirements exactly. The list of requirements is intended to show the kinds of experience and qualities we’re looking for,

At Rockstar Games, we create world-class entertainment experiences. Become part of a team working on some of the most rewarding, large-scale creative projects to be found in any entertainment medium - all within an inclusive, highly-motivated environment where you can learn and collaborate with some of the most talented people in the industry. Rockstar Games is seeking a Senior Manager, Product Management to help shape the future of Rockstar’s Creator Platform ecosystem. This role focuses on building sustainable systems that empower creators to build experiences, attract players, and operate thriving communities. As a member of our team, you will need a critical and creative eye capable of putting forth innovative solutions to complex problems. Working with a wide variety of technical and non-technical partners, you will be tasked with cultivating and delivering a vision for the platforms. This is a full-time, permanent and in-office position based in Rockstar’s unique game development studio in the heart of London. WHAT WE DO The Rockstar Games Creator Platform Team builds and operates technology platforms that enable creators to develop their own game modes, experiences, and modifications and players to experience community-created content on fully customized servers. We create tools and services that empower creators to build, publish, operate, grow, and monetize their experiences. We work at the intersection of games, creator ecosystems, platform infrastructure, community, and innovation. RESPONSIBILITIES Drive product initiatives from concept through launch and iteration, including opportunity definition, prioritization, requirements, launch planning, and post-launch analysis. Define product strategy and roadmaps for key Creator Platform areas in partnership with leadership, engineering, developer relations, analytics, publishing, and operations. Use qualitative and quantitative inputs —

Fin is the AI Customer Agent company on a mission to help businesses provide perfect customer experiences. Our AI Agent Fin is the highest-performing AI Customer Agent on the market today, enabling businesses to deliver impeccable, always-on customer support across the customer journey – from service, to sales, to ecommerce. Powered by our own AI models, Fin resolves complex customer issues end-to-end across every channel, with minimal set-up and integration. Fin can also be combined with our natively integrated Intercom help desk for one single system that is designed to meet the needs of modern day support teams. Founded in 2011, Fin became one of the fastest growing companies and remains one of the largest private software companies in the world with nearly 30,000 global businesses using our products to transform their customer support. Driven by our core values, we push boundaries, build with speed and intensity, and relentlessly deliver incredible value to our customers. What’s the opportunity? Fin's websites, including fin.ai , are strategic growth levers for the company — powering storytelling, brand, experimentation, and product discovery. As our Staff Engineer, you will shape the technical direction and architectural evolution of our web platform and systems. You’ll act as the technical leader across our marketing and growth web surfaces. This is a cross-functional engineering leadership role, partnering with marketing, analytics, design, data science, and engineering teams — to ensure our web stack is modern, performant, measurable, and delightful to build on. You’ll operate with a high degree of autonomy and will be accountable for setting the long-term technical strategy for the team and executing against it. What will I be doing? As a senior technical leader, you will: Own and evolve the architecture of Fin's web platform. Define the long-term technical strategy for the web team, focusing on scalability, performance, developer productivity, o

Coder is looking for a Senior Sales Development Representative (SDR) to fuel our growth by generating qualified pipeline for our Enterprise Account Managers. You’ll help bring Coder’s Environment-as-a-Service platform to some of the world’s largest companies that are adopting AI-driven development at scale. This role is all about creating opportunities: finding and engaging the right prospects, uncovering the pain points Coder can help with, and setting up qualification calls that set our EAMs up for success. You’ll play a critical role in driving Coder’s outbound motion and helping large organizations build software faster, more securely, and at scale through the collaboration of AI coding agents and human developers. What you’ll do here Generate qualified opportunities for EAMs through targeted outbound prospecting Conduct multi-channel outreach across phone, email, and LinkedIn using tools like SalesLoft, Sales Navigator, ZoomInfo, 6sense, and Nooks Research target accounts and key personas to craft personalized and value-driven messaging Set up qualification calls for EAMs to run and advance through the sales cycle Work closely with EAMs to strategize account outreach and hand off qualified opportunities seamlessly Maintain accurate activity and lead data in CRM and engagement platforms Collaborate with marketing to align messaging and campaigns to drive higher response rates Stay sharp on developer tooling, platform engineering, and AI-driven development trends to speak credibly with prospects What we’re looking for 1-3 years in outbound SDR or BDR roles within SaaS or developer-focused technology companies Proven ability to generate pipeline through outbound cold calling, emailing, and social selling Experience with SalesLoft, LinkedIn Sales Navigator, ZoomInfo, 6sense, and similar prospecting tools Strong written and verbal communication skills; able to clearly articulate technical value propositions Grit, curiosity, and the ability to handle rejection while

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! We’re looking for a senior engineer to help build, maintain and evolve the training framework that powers our frontier-scale language models. This role sits at the intersection of large-scale training, distributed systems, and HPC infrastructure. You will design and maintain the core components that enable fast, reliable, and scalable model training — and build the tooling that connects research ideas to thousands of GPUs. If you enjoy working across the full stack of ML systems, this role gives you the opportunity and autonomy to have massive impact. What You’ll Work On Build and own the training framework responsible for large-scale LLM training. Design distributed training abstractions (data/tensor/pipeline parallelism, FSDP/ZeRO strategies, memory management, checkpointing). Improve training throughput and stability on multi-node clusters (e.g., GB200/300, AMD, H200/100). Develop and maintain tooling for monitoring, logging, debugging, and developer ergonomics. Collaborate closely with infra teams to ensure our cluster, container environments, and hardware configurations support high-performance training. Investigate and res