Python Jobs

WRITER is seeking a Deployment Engineer to join their team and help enterprises orchestrate AI-powered work. In this role, you will partner directly with leading enterprise customers to understand their unique business challenges and architect AI-powered solutions leveraging WRITER's platform and enterprise-grade LLMs. You will transform complex needs into tangible, high-impact applications, driving significant business results and shaping the future of work for major companies. This is a critical role that directly impacts customer success and product evolution, contributing to WRITER's mission to expand human capacity through superintelligence.

WRITER is a leading enterprise AI platform that empowers businesses to orchestrate AI-powered work and expand human capacity through superintelligence. We provide a trustworthy AI solution that unites IT and business teams to drive enterprise-wide transformation. Our platform enables hundreds of companies to build and deploy AI agents grounded in their data and powered by enterprise-grade LLMs. As a strategic solutions architect, you will work directly with our largest and most strategic prospects to identify, validate, and build innovative agentic AI solutions that unlock massive business value. This role is crucial in shaping how leading companies adopt and scale AI, making a tangible impact on their success and WRITER's leadership in enterprise generative AI.

Harvey

Harvey is redefining legal work by combining cutting-edge AI with intuitive product experiences. As we scale rapidly and take on increasingly complex use cases, we are expanding our product engineering team to accelerate our ability to ship fast, delight users, and build infrastructure that scales with us. As an Engineering Manager for Product Engineering, you will lead teams of fullstack engineers building the core product surfaces that lawyers and legal professionals use every day—from complex workflows and collaboration tools to elegant user interfaces powered by sophisticated backend systems. This role is equal parts product intuition and technical execution. You will be trusted to make fast, high-quality decisions, ship impactful features, and grow a team that embodies engineering excellence.

$260k - $330k

Mistral AI

Mistral AI is seeking an Applied AI Engineer, Fullstack Software Engineer to facilitate the adoption of its products among customers operating in critical, sovereign, and highly regulated environments. You will be an integral part of our Applied AI Engineering team, helping drive the successful deployment of Mistral AI products for critical infrastructure, sovereign institutions, and strategic public or private-sector organizations. This is a hands-on, customer-facing engineering role where you will design, build, and deploy full-stack AI applications tailored to complex and sensitive environments, working hand-in-hand with customers from pre-sale to post-implementation.

Mistral AI

Mistral AI is seeking a Technical Lead, Applied AI to drive the technical strategy, execution, and delivery of complex AI solutions for enterprise customers. This role involves leading project teams of Applied AI Engineers to ensure successful deployment of Mistral AI products and the development of high-impact, scalable AI use cases. You will serve as the primary technical point of contact for strategic customers, guiding them through the entire lifecycle from pre-sales to post-implementation, while collaborating with research, product, and engineering teams to shape future offerings. The position bridges cutting-edge AI research with real-world enterprise applications, ensuring solutions are robust, scalable, and aligned with customer needs and Mistral's technological vision.

thinkingmachines

Thinking Machines Lab is seeking pre-training researchers to join their mission of advancing collaborative general intelligence. This role is central to developing the next generation of AI models by blending research with large-scale data engineering. You will be responsible for assembling pre-training datasets and data systems, designing and implementing methods for sourcing, curating, and analyzing data for quality and performance. The position involves working with automated pipelines and human-in-the-loop processes, contributing both scientific insights and production-grade code. It's an ideal opportunity for individuals passionate about the intersection of data, machine learning, and systems, and who are eager to shape the future of AI.

$350k - $475k

thinkingmachines

Thinking Machines Lab is seeking researchers to bridge the gap between raw AI intelligence and useful, safe, and collaborative systems. This role focuses on post-training data research, combining human insight and machine learning techniques to capture and steer model behavior based on human preferences. You will be responsible for translating research ideas into actionable data through labeling and collection campaigns, understanding data quality science, and developing metrics to measure the impact of data and training interventions. The position also involves exploring new paradigms for human-AI interaction and scalable oversight, blending research, data operations, and technical implementation to advance human-centered AI systems. This role requires both fundamental research and practical engineering, making it ideal for individuals who enjoy deep theoretical exploration and hands-on experimentation.

$350k - $475k

thinkingmachines

Thinking Machines Lab is seeking an infrastructure engineer to lead and enhance the security infrastructure for their foundation models. This role involves working across compute, storage, networking, and data platforms to ensure systems are secure, reliable, and scalable. The engineer will define security controls, architecture, and tooling, integrating security by default into the platform. Collaboration with research and product teams will be key to enabling rapid progress while maintaining robust protection for models, data, and environments.

$200k - $475k

Harvey

Harvey is transforming legal and professional services by combining agentic AI, an enterprise-grade platform, and deep domain expertise. We are a fast-scaling company with strong product-market fit, seeking individuals who want to do the best work of their careers. The Developer Experience team is crucial for maintaining our rapid growth, building CI/CD systems, internal frameworks, and platform guardrails that enable all engineers to ship AI features quickly and safely. As a Software Engineer on this team, you will create systems to maximize engineer velocity and efficiency, working across the tech stack to instill reliability, automation, and simplicity into developer workflows. You'll also have a unique opportunity to apply AI to developer productivity, shaping the future of software development within an AI-native company.

$231k - $340k

Cohere

Cohere is seeking a Research Intern to collaborate with researchers and tools on designing and implementing novel research ideas and shipping state-of-the-art models to production. Interns will have the opportunity to work on various teams covering base model training, retrieval augmented generation, data and evaluation, safety, and finetuning, or any research area relating to LLMs. This role offers a chance to broaden research connections while gaining deep experience in a growing AI startup.

Harvey

Harvey is transforming legal and professional services by combining agentic AI, an enterprise-grade platform, and deep domain expertise. This role offers a unique opportunity to build a generational company at an inflection point, with strong product-market fit and investor support, scaling rapidly to define a new category. The team operates with intensity, ownership, and a commitment to the mission, valuing decisiveness, simplicity, and continuous improvement. As a Software Engineer, Agents, you will be instrumental in building the systems that make AI agents indispensable to legal professionals, designing environments, managing context windows, creating tools, and developing evaluations to unlock new capabilities.

$231k - $340k

Harvey

Harvey is transforming legal and professional services by combining agentic AI, an enterprise-grade platform, and deep domain expertise. This role offers a unique opportunity to build a generational company at an inflection point, with strong product-market fit and investor support, scaling rapidly to define a new category. The team operates with intensity, ownership, and a commitment to the mission, valuing decisiveness, simplicity, and continuous improvement. As a Software Engineer, Agents, you will be instrumental in building the systems that make AI agents indispensable to legal professionals, designing environments, managing context windows, creating tools, and developing evaluations to unlock new capabilities.

$231k - $340k

Harvey

Harvey is transforming legal and professional services by combining agentic AI, an enterprise-grade platform, and deep domain expertise. This role offers a unique opportunity to build a generational company at an inflection point, scaling rapidly and defining a new category. The team operates with intensity, ownership, and a commitment to the mission, valuing decisiveness, simplicity, and continuous improvement. If you are driven to do your best work alongside like-minded individuals, Harvey is the place to be.

$161k - $242k

Harvey

Harvey is transforming legal and professional services by combining agentic AI, an enterprise-grade platform, and deep domain expertise. This role offers a unique opportunity to build a generational company at an inflection point, scaling rapidly and defining a new category. The team operates with intensity, ownership, and a commitment to the mission, valuing decisiveness, simplicity, and continuous improvement. If you are driven to do your best work alongside like-minded individuals, Harvey is the place to be.

$161k - $242k

Reflection ai

Reflection.AI is seeking a Member of Technical Staff - Security Software Engineer to establish our Application Security function from the ground up. This role offers significant autonomy to design and implement solutions across various Security Engineering projects, including AI agent incident detection and response, and internal AI agents. The ideal candidate is a self-starter who excels in high-ownership, low-structure environments and possesses a strong "0 to 1" mindset, ready to build and innovate within a talent-dense team focused on making intelligence open and accessible.

Harvey

Harvey is transforming how legal and professional services operate by combining frontier agentic AI, an enterprise-grade platform, and deep domain expertise. This is a rare chance to help build a generational company at a true inflection point, scaling fast and defining a new category. The work is ambitious, the bar is high, and the opportunity for growth is unmatched. As a Staff Software Engineer on the Core Infrastructure team, you will play a critical role in designing and building new infrastructure systems while scaling and strengthening existing ones. Our infrastructure powers every user interaction with Harvey, processing billions of prompt tokens and millions of daily requests across our global legal AI platform. You'll work in an environment balanced between innovation and operational excellence, ensuring Harvey remains resilient and efficient as it scales products, regions, customers, and usage. Your contributions will directly impact the reliability, scalability, and security of our platform.

$201k - $264k

Harvey

Harvey is transforming how legal and professional services operate by combining frontier agentic AI, an enterprise-grade platform, and deep domain expertise. This is a rare chance to help build a generational company at a true inflection point, scaling fast and defining a new category. The work is ambitious, the bar is high, and the opportunity for growth is unmatched. The team moves fast, takes ownership, and is deeply committed to the mission, operating with intensity and pushing for excellence. As a Staff Software Engineer on the Core Infrastructure team, you will play a critical role in designing and building new infrastructure systems while scaling and strengthening existing ones. Your contributions will directly impact the reliability, scalability, and security of our platform as we serve the world's leading law firms and professional service providers.

$236k - $290k

Mistral AI

Mistral AI is seeking an Applied Scientist with deep expertise in engineering sciences to work at the forefront of AI-accelerated simulation. This role involves collaborating with industrial customers and internal research teams to build and deploy AI Physics Models, complementing our existing Large Language Models (LLMs). You will be involved in the entire process, from curating high-fidelity simulation datasets and training/evaluating models to delivering production-grade AI solutions directly to engineering teams. The target domains include computational fluid dynamics, structural mechanics, semiconductor design, multi-physics modeling, and digital twins. Working cross-functionally, you will ensure our models meet stringent engineering standards beyond just benchmark metrics.

Replit

The Anti-Abuse team at Replit is responsible for defending the platform from exploitation by detecting and preventing various forms of abuse, including phishing, cryptomining, LLM token farming, and malicious use of the platform. This role involves adversarial work, requiring the development of detection systems, heuristics, and automated responses to stay ahead of constantly adapting attackers. A unique aspect of this role is the AI-native nature of Replit's platform, presenting opportunities to build guardrails for AI-generated code, detect prompt injection attacks at scale, and leverage LLMs for defense. The position offers hands-on experience applying AI to security problems in a production environment with real attackers, with end-to-end ownership from identifying abuse patterns to shipping scalable solutions.

Mistral AI

Mistral AI is seeking an Applied AI Engineer to join its specialized unit focused on delivering high-impact, secure AI solutions for critical and sovereign institutions. This team works closely with clients in highly regulated environments to design, deploy, and maintain AI systems that meet stringent standards for reliability, security, and operational excellence. The role involves technical design, implementation, and deployment of AI solutions tailored to the unique needs of critical infrastructure and sovereign institutions, contributing directly to projects with significant societal and operational impact.