C# Jobs

Applied Intuition is seeking a Senior Software Engineer to join their Cloud Infrastructure team. This role is responsible for building and maintaining the platform that powers the company's AI workloads and enterprise AI platform, Dana. The team operates in a cloud-native and cloud-agnostic environment, utilizing Kubernetes and managing infrastructure as code across the full stack, including compute, networking, storage, and observability. The position involves designing and operating multi-cluster Kubernetes infrastructure, building multi-tenant platform primitives, and orchestrating secure execution environments for agentic workloads. This is a hands-on infrastructure role with significant platform-building and solutions-architecture responsibilities, requiring close collaboration with internal engineering teams and ownership of architectural decisions and incident response.

$60k - $300k

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 unique opportunity to help build a generational company at an inflection point, with strong product-market fit and investor support. The team moves fast, takes ownership, and is deeply committed to the mission, valuing decisiveness, simplicity, and continuous improvement. As a Staff Software Engineer on the Model Infrastructure team, you will lead the design and development of the systems powering all AI requests at Harvey, partnering with AI Research, Product Engineering, and external model providers to build a highly reliable, scalable, observable, and efficient platform.

$231k - $340k

Harvey

Harvey is transforming how legal and professional services operate by combining frontier agentic AI, an enterprise-grade platform, and deep domain expertise. This role offers a chance to help build a generational company at an inflection point, with strong product-market fit and investor support. 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 Model Infrastructure team, you will lead the design and development of the systems that power every AI request at Harvey, partnering closely with AI Research, Product Engineering, and Infrastructure to build a highly reliable, scalable, observable, and efficient platform.

$193k - $290k

Cloudflare's Emerging Technologies & Incubation team builds and launches bold new products on Cloudflare's edge network. This role is on the Durable Objects team, which powers stateful serverless applications for Cloudflare customers. You'll help evolve the runtime and the low-level routing and storage systems that support real-time chat, multiplayer games, AI agents, and other stateful workloads at scale. We are looking for builders who see the cracks in the Internet and have the AI-native curiosity to create solutions using the latest tools, valuing curiosity over bureaucracy.

The CNI team builds and operates systems that enable Cloudflare's enterprise customers to connect their networks directly to Cloudflare via private, dedicated interconnects. This product, Cloudflare Network Interconnect (CNI), supports various interconnect types across hundreds of global locations and is foundational to key services like Magic Transit, Cloudflare WAN, Zero Trust, and application security for major clients. As a member of this team, you will develop and enhance the systems responsible for provisioning, monitoring, and orchestrating these private network interconnects at scale. You will collaborate with Product Management, Network Engineering, and Infrastructure teams on significant initiatives to integrate enterprise customers directly into Cloudflare's global network.

Cloudflare is seeking builders to join their mission of improving the Internet. This role focuses on enhancing network resilience and reducing operational toil within Cloudflare's global network. You will be responsible for the technical operation and engineering of the core data center network, including planning, installation, and management. The position involves building tools to automate operational tasks, streamline deployments, and provide a platform for other engineering teams, with a strong emphasis on an "automate everything" approach to create failure-resistant and scalable systems. You will also play a key role in system design, bringing ideas from conception to production.

$150k - $206k

Join the Workers Deploy & Config team as a Principal Engineer, the most senior technical role on the team behind Cloudflare’s serverless edge developer platform. You’ll build the critical large-scale systems that let developers deploy, configure, and manage Workers globally, powering everything from simple static sites to full-stack applications serving millions of users. This team sits at the foundation of Cloudflare’s developer platform, including Pages and R2. The work spans distributed systems, high-traffic APIs, performance, reliability, and developer experience at global scale.

$220k - $303k

Crusoe is seeking a Senior Backend Software Engineer to join the Core Backend team within Cloud Customer Experience (CCX). This role is crucial for delivering a best-in-class user experience for Crusoe's AI-focused cloud platform. The Core Backend team is responsible for the foundational services that power every customer interaction, ensuring reliability and scalability. The work involves building and operating key systems like the API Gateway, Resource Management Layer, Quota Management, Notifications, and User Onboarding Flows, all while focusing on speed, reliability, and coherence as the platform grows.

$170k - $205k

Applied Intuition is seeking an Autonomy Integration Software Engineer to develop, deploy, and maintain the core systems for all-domain autonomy capabilities. This role involves integrating new vehicles and hardware, with a significant portion of the work focused on deploying and testing software on autonomous vehicles in real-world environments. You will be responsible for systems engineering, field deployment and testing, interfacing with sensors and autopilots, optimizing perception and autonomy modules, managing communication systems, integrating third-party software, and ensuring software quality through CI/CD processes. Collaboration with cross-functional teams and documentation are also key aspects of this position.

$60k - $300k

Glean is seeking a Supply Chain Security Engineer to ensure the security of our technology stack by eliminating software vulnerabilities (CVEs). This role involves securing base OS images, scanning and patching open-source software (OSS) dependencies, and integrating advanced security tools into our CI/CD pipeline. You will be instrumental in building and executing our software supply chain security strategy, enhancing vulnerability scoring, and reducing the overall vulnerability footprint across various programming ecosystems and base layers. The position also includes creating hardened images, leading initiatives like SBOM generation and automated fix pipelines, and developing policy-driven controls for build provenance and trust verification. Additionally, you will manage secure software supply chain guidelines and documentation, and contribute to achieving FEDRAMP readiness for vulnerability management.

Glean is seeking a talented security-focused software engineer to join our growing team. In this role, you will play a critical part in developing and maintaining the security foundation of our platform. You will be responsible for designing, implementing, and testing security features across various software components, ensuring the integrity and safety of our Work AI platform.

$185k - $260k

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.

Applied Intuition is seeking a talented Engineer to design and develop the world representation layer for their Axion simulation stack. This is a deeply technical role focused on computational geometry, real-time world modeling, and large-scale simulation. You will join a new team building foundational scene and mapping systems that are critical for downstream sensor fusion and path planning. The ideal candidate will have experience building spatial worlds for games, simulations, or autonomous systems, with a strong understanding of how to make these representations fast, accurate, and scalable under real operational constraints.

$60k - $300k

Applied Intuition is seeking a Software Engineer to join our Korea office and build the company's multi-agent autonomy development tools. This on-site role is crucial for developing capabilities that defense customers rely on to design, train, and validate coordinated Unmanned Aerial Vehicle (UAV) behavior. You will collaborate closely with the U.S. product engineering team and directly engage with Korean defense customers to translate their operational requirements into tangible product features. The position involves contributing to system-level design and architecture, ensuring scalability, reliability, and performance, while also guiding customers on optimizing their use of our tools for developing their own multi-agent unmanned systems.

$60k - $300k

OpenAI

We are seeking a senior cybersecurity practitioner and operations strategist to enhance the quality, scalability, and technical rigor of our Cyber Operations. This role involves a blend of hands-on cyber judgment and systems-level operating design. You will tackle complex dual-use questions, refine standard operating procedures (SOPs), improve reviewer and vendor performance, and develop practical tools and automations. Success in this senior individual contributor role is measured by durable improvements in the operating model and the effectiveness of the reviewers who execute it. This position, based in Toronto, is currently remote and is expected to transition to an in-office arrangement.

Perplexity AI is seeking a deeply technical software engineer to own and evolve its model serving platform. This mission-critical system connects products and research systems with inference layers, providing a fast and reliable interface across providers. The role involves working at the intersection of distributed systems, AI products, and infrastructure, making it easier for teams to adopt new models, run experiments, and ship dependable products. The ideal candidate will possess strong technical judgment, curiosity about frontier models, and experience designing core abstractions and leading technical decisions.

Perplexity is seeking top-tier AI Research Scientists and Engineers to advance our AI products and capabilities, focusing on building the future of AI-powered search and agent experiences. You will contribute to SOTA experiences that handle hundreds of millions of queries and continue to scale rapidly. Depending on your interests and expertise, you can join one of three specialized teams: the Core Research Team focusing on foundational models, the Agent Products Team fine-tuning models for agent and product experiences, or the Comet Agent Team dedicated to developing and enhancing the Comet Agent product.

OpenAI

OpenAI Consumer Devices is building the next generation of products that bring powerful AI into people’s everyday lives. The Operating Systems team is critical in this mission, turning sophisticated hardware and AI capabilities into a reliable, trusted platform where security is central. We are looking for a Software Security Architect to define the security architecture for OpenAI’s next-generation operating system. You’ll work alongside hardware security architects and partner with various teams to protect users, their devices, and their data. This is a senior, hands-on role for someone who can connect operating system internals, hardware-backed security, and real-world product constraints, shaping the platform’s trust model and setting the technical foundations for safe, private AI.

Applied Intuition is seeking a Perception & Fusion Engineer to join their team in developing, integrating, and maintaining real-time sensor software solutions for autonomous vehicles across various domains. You will design, develop, and integrate sensor fusion algorithms to interface with different platforms and support autonomy team objectives. This role involves developing autonomous sensor controllers to fuse information from state-of-the-art sensor systems like EO, IR, acoustics, radar, and RF.

$10k - $20k

World Labs is a frontier AI research and product company focused on spatial intelligence, co-founded by Dr. Fei-Fei Li, Justin Johnson, and Ben Mildenhall. The company is pioneering world models that perceive, generate, reason, and interact with virtual and physical worlds, with its flagship product Marble transforming text, images, and video into navigable 3D worlds. Backed by leading investors, World Labs is assembling a world-class team at the intersection of AI research and real-world deployment.

$250k - $350k