Claude Jobs

Anthropic

As a Research Engineer within Reinforcement Learning, you will collaborate with a diverse group of researchers and engineers to advance the capabilities and safety of large language models. This role blends research and engineering responsibilities, requiring you to both implement novel approaches and contribute to the research direction. You'll work on fundamental research in reinforcement learning, creating 'agentic' models via tool use for open-ended tasks such as computer use and autonomous software generation, improving reasoning abilities in areas such as mathematics, and developing prototypes for internal use, productivity, and evaluation.

Anthropic

Anthropic's production models undergo sophisticated post-training processes to enhance their capabilities, alignment, and safety. As a Research Engineer on our Post-Training team, you'll train our base models through the complete post-training stack to deliver the production Claude models that users interact with. You'll work at the intersection of cutting-edge research and production engineering, implementing, scaling, and improving post-training techniques like Constitutional AI, RLHF, and other alignment methodologies. Your work will directly impact the quality, safety, and capabilities of our production models. For this role, interviews are conducted in Python, and the position may require responding to incidents on short notice, including weekends.

Anthropic

Anthropic is building reliable, interpretable, and steerable AI systems to be safe and beneficial for users and society. The Application Security team plays a crucial role in integrating security throughout the software development lifecycle. In this hands-on technical role, you will collaborate with software engineers and researchers to embed security from design to implementation. You will lead threat modeling and secure design reviews, proactively identify and mitigate risks, and build tools to support secure coding practices. Your work will influence our tooling, detection capabilities, and defenses against emerging AI/ML threats, while also developing standards, processes, and educational resources to empower all engineers as security champions. This role requires a security practitioner with an attacker's mindset, a developer's perspective, and strong relationship-building skills.

Anthropic

As an Applied AI team member at Anthropic, you will be a Pre-Sales architect focused on becoming a trusted technical advisor helping large enterprises understand the value of Claude and paint the vision on how they can successfully integrate and deploy Claude into their technology stack. You'll combine your deep technical expertise with customer-facing skills to architect innovative LLM solutions that address complex business challenges while maintaining our high standards for safety and reliability. Working closely with our Sales, Product, and Engineering teams, you'll guide customers from initial technical discovery through successful deployment. You'll leverage your expertise to help customers understand Claude's capabilities, develop evals, and design scalable architectures that maximize the value of our AI systems.

Anthropic

Anthropic is seeking Research Engineers to reimagine how Claude interacts with external data sources. This role involves designing novel architectures for organizing information and training language models to effectively utilize these architectures. The goal is to move beyond traditional data paradigms to accommodate the capabilities of Large Language Models (LLMs).

Replit

Replit is seeking a Social Media Support Specialist to manage their social media presence and community interactions while assisting developers with technical issues, billing inquiries, and product usage questions. This role involves acting as a liaison between the community and Replit's engineering and product teams, bubbling up important feedback and areas for improvement. The specialist will engage with developers across various platforms, ensuring they have the support needed to bring their ideas to life and contribute to Replit's mission of democratizing software development.

Replit

Replit is seeking a Social Media Support Specialist to join their team. This role is at the forefront of assisting developers with their creations while managing the company's social media presence and community interactions. You will help address complex technical issues, billing inquiries, account management, and product usage questions across various platforms like X (Twitter), LinkedIn, Reddit, and app stores. You will also be responsible for escalating important feedback and issues to the engineering and Product teams, acting as a key voice in community engagement. This position is part of a global support team dedicated to ensuring developers worldwide receive the assistance they need.

Replit

Replit is seeking an AEO/GEO/SEO Lead to spearhead the company's discovery strategy across both AI-generated answers and traditional search engines. This is a foundational role where you will define and execute a zero-to-one strategy, leveraging AI production, agency partners, and cross-functional teams. The goal is to make Replit the primary answer when users inquire about building software, driving significant growth through AI referral traffic and compounding traditional search presence. You will collaborate closely with Web, Growth, Brand, Content, Product, Engineering, and Analytics teams in a fast-paced, experimental environment.

Baseten is seeking an AI Engineer to join their Training Product team. This role involves building AI-driven product features for customers training frontier models and enhancing Baseten's internal AI capabilities by transforming manual workflows into agentic ones. You will collaborate directly with research engineers, taking concepts from internal research to customer-ready products. This is a hands-on position offering significant autonomy, where you will identify key problems, develop reliable AI systems with appropriate harnesses and guardrails, and take ownership of the outcomes. The ideal candidate has a proven track record of shipping agents and is eager to make that their primary focus.

Harvey

Harvey is transforming legal and professional services by combining agentic AI, an enterprise-grade platform, and deep domain expertise. This role offers a chance to build a generational company at an inflection point, with strong product-market fit and investor support. The team moves fast, takes ownership, and is committed to the mission, valuing decisiveness, simplicity, and continuous improvement. As a Senior Software Engineer on the Security Engineering team, you will build and operate foundational security services critical for all engineers, including identity and access management, secrets management, and tooling that prioritizes secure practices. You will design, code, and own these systems in production, addressing the unique challenges posed by agentic systems acting on sensitive user data.

$188k - $282k

Mercor is a leading AI data company organizing human intelligence to power the AI economy. We are building the layer between human expertise and frontier models, with millions of domain experts on our platform training AI models. This role focuses on code data, specifically owning the architecture and algorithms for searching across code tasks. The goal is to find similar tasks, route them to the right models, and translate natural language questions into precise retrieval queries. This is a hands-on technical leadership position where you will design and build retrieval systems, manage trade-offs for speed and cost at scale, and continuously evolve these systems as state-of-the-art code models advance. You will also set technical direction, mentor engineers, and raise the bar for engineering practices within the organization.

Replit

Replit is seeking a Premium Support Engineer to join our team in Tokyo. In this role, you will be the primary point of contact for our most valuable customers, providing expert and timely technical support for complex product issues. You will guide customers through critical incidents, ensuring high standards of quality and speed in every interaction. This position requires a blend of deep technical troubleshooting skills and calm, confident communication to keep builders productive, whether they are enterprise teams or top-tier developers.

Baseten is seeking an AI Developer Productivity Engineer to build the internal platform that empowers engineers to work in an AI-first manner. This role involves creating the agent configurations, tooling, and evaluation frameworks that make AI agents competent and easy to use within our codebase. You will be responsible for making the "good path" for AI adoption the easiest path, focusing on shipping infrastructure and measuring its impact. The goal is to enable teams to adopt these AI tools because they are superior to self-assembled solutions, not due to mandates. You will write the playbook for an AI-first Software Development Lifecycle (SDLC) at Baseten, driving adoption through excellent developer experience, clear documentation, and low friction.

Crusoe is seeking a Senior Staff Customer Operations Program Manager to join their AI infrastructure company. This role is a senior individual contributor position focused on transforming complex, high-priority initiatives into successful programs within the Customer Experience organization. You will be responsible for managing critical timelines, driving execution in partnership with leadership, and establishing operational frameworks from the ground up. This is an AI-native role, requiring a proactive approach to building AI-driven workflows and a deep understanding of modern AI tools.

$175k - $245k

Fal

fal is seeking a hands-on GTM Operations Engineer to join their Revenue Operations team. This AI-first role focuses on the execution layer of revenue systems, leveraging AI tools like Claude, Cursor, and Codex to enhance productivity. You will be the primary builder and operator for the GTM organization, providing daily support and unblocking sales representatives. The ideal candidate enjoys building systems and is passionate about helping the team succeed by resolving technical issues and improving processes.

$150k - $180k

Decagon is seeking an IT Engineer to join their lean and highly collaborative IT team. This role will be the hands-on IT presence for the San Francisco office, playing a critical role in supporting a fast-scaling global workforce. You will co-own identity and access management, endpoint administration, and SaaS operations, while also working the support queue and solving problems at the root. This position is ideal for someone who enjoys solving problems, improving processes, and leveraging technology to create scalable solutions, contributing to the foundations required for the company's next phase of growth.

$96k - $145k

Decagon is seeking an IT Engineer to join their lean and highly collaborative IT team. This role is crucial for supporting a fast-scaling global workforce and driving automation, security, and operational excellence. The IT Engineer will be the hands-on IT presence for the New York office, co-owning identity and access management, endpoint administration, and SaaS operations. The ideal candidate enjoys solving problems, improving processes, and leveraging technology to create scalable solutions, contributing to the company's next phase of growth.

$95k - $140k

Fireworks is seeking a product-minded engineer to join their team and own the surfaces that make their AI platform, Nexus, a reality. Nexus is a drop-in platform designed to help engineering organizations reduce AI spend by routing workloads to high-performing open models. This role involves owning features end-to-end, from understanding problems and designing solutions to shipping and observing developer usage. You will be responsible for the intelligent router, cost-observability and enterprise-control layers, integrations, and core platform components like inference APIs and fine-tuning workflows. This is a high-autonomy individual contributor role on a small team, offering significant leverage and direct impact on a product that ships to production at scale.

Legora is seeking an Endpoint Engineer to join their IT and AI Enablement team. This role is responsible for managing and securing Legora's Apple-first endpoint fleet, ensuring devices are secure, automated, and healthy. The Endpoint Engineer will own the platform that transforms a new Mac into a secure, working laptop and maintains the health of every device. This position involves working across IT Systems, Workplace Technology, Information Security, and Engineering, and will define the endpoint roadmap.

Sierra is building a platform to enable companies worldwide to create better, more human customer experiences with AI. We partner with industry leaders and are primarily an in-person company based in San Francisco, with growing international offices. Our core values are Trust, Customer Obsession, Craftsmanship, Intensity, and Family. The co-founders, Bret Taylor and Clay Bavor, bring extensive experience from leading tech companies and AI initiatives.