Rust Jobs

Perplexity is seeking a Search Machine Learning Engineer Intern to contribute to the development of next-generation search technologies, with a specific emphasis on retrieval and ranking. Interns will collaborate with seasoned engineers to enhance search quality, explore novel models, and implement features that directly influence user search and information discovery experiences. This internship program offers a duration of 12-24 weeks, operating on a full-time or part-time basis, and requires in-person attendance at our Belgrade office.

$12k - $24k

Replit

This Principal Product Engineering role focuses on Replit's Money Infrastructure, the financial systems that manage how Replit earns money, how builders earn money, and how Agents transact. You will be at the intersection of engineering, product, and business, building systems that directly impact revenue, trust, and critical user journeys. The ideal candidate will design and scale reliable financial systems, translating complex monetary logic into user-friendly experiences, and has a passion for monetizing innovation and contributing to the company's pricing strategy.

AI needs a new infrastructure layer, and we're building it at Modal. Our serverless platform provides instant GPU access, sub-second container starts, and native storage, enabling customers to serve low-latency inference, fine-tune models, and access production-ready sandboxes at scale. We are seeking experienced engineers to design, build, and maintain these novel, high-performance systems.

Cohere

Cohere is seeking a Member of Technical Staff focused on Model Efficiency to join a fast-growing team of researchers and engineers. This role is instrumental in pushing the boundaries of LLM inference efficiency, developing techniques to improve model execution in production for lower latency and higher throughput. You will work across the inference stack, identifying bottlenecks and developing optimizations, collaborating with modeling and systems teams to ship meaningful improvements. Opportunities exist to build expertise in advanced performance techniques like GPU/CUDA optimizations and model execution strategies for large-scale architectures.

Mistral AI

Mistral AI is a pioneering company dedicated to democratizing AI through high-performance, optimized, open-source models, products, and solutions. We aim to simplify tasks, save time, and enhance learning and creativity by integrating cutting-edge AI into daily working life. Our comprehensive platform serves both enterprise and personal needs, featuring offerings like Le Chat, La Plateforme, Mistral Code, and Mistral Compute. We are a dynamic, collaborative, and diverse team passionate about AI's potential to transform society, driving innovation from our distributed teams across France, USA, UK, Germany, and Singapore. Join us to shape the future of AI and make a meaningful impact.

Mistral AI

Mistral AI is a pioneering company dedicated to democratizing AI through high-performance, optimized, open-source, and cutting-edge models, products, and solutions. Our comprehensive AI platform serves both enterprise and personal needs, offering tools like Le Chat, La Plateforme, Mistral Code, and Mistral Compute to bring frontier intelligence to end-users. We are a dynamic, collaborative, and diverse team passionate about AI's potential to transform society, thriving in competitive environments and committed to driving innovation. Join us to be part of shaping the future of AI and making a meaningful impact.

Rogo is transforming global finance with AI, empowering professionals at top investment firms with unparalleled speed, accuracy, and insight. We are redefining financial workflows and are a rapidly growing, global company with proven product-market fit and strong investor backing. We are scaling quickly and defining a new category of enterprise AI. Our team is sharp, motivated, and deeply committed to our mission, taking ownership of complex problems and focusing on our users. If you thrive in a fast-paced environment and want to help build the future of finance, join us.

Mistral AI

Mistral is on a mission to democratize AI by producing frontier intelligence for everyone, developed in the open. We are a dynamic, collaborative team passionate about AI's potential to transform society, with diverse teams distributed globally. We develop models for enterprise and consumers, focusing on systems that change business operations and integrate into daily lives, while also releasing frontier models open-source. We are hiring experts in large language model training and distributed systems to shape the future of AI.

We are seeking experienced engineers to build developer tools that users love. The ideal candidate will have a proven track record of creating intuitive and productive interfaces for developers. This role involves a strong focus on developer ergonomics and productivity, requiring a deep understanding of advanced Python features, particularly async programming. You will work closely with users to solve their problems and contribute to a high-impact infrastructure layer for AI. This position also includes participation in an on-call rotation to address production incidents.

OpenAI

As a Security Engineer on the Agent Security Team, you will be at the forefront of securing OpenAI’s cutting-edge agentic AI systems. Your role will involve designing and implementing robust security frameworks, policies, and controls to safeguard OpenAI’s critical assets and ensure the safe deployment of agentic systems. You will develop comprehensive threat models, partner tightly with our Agent Infrastructure group to fortify the platforms that power OpenAI’s most advanced agentic systems, and lead efforts to enhance safety monitoring pipelines at scale. We are looking for a versatile engineer who thrives in ambiguity and can make meaningful contributions from day one, prepared to ship solutions quickly while maintaining a high standard of quality and security. You will need to bring expertise in securing complex systems and designing robust isolation strategies for emerging AI technologies, all while being mindful of usability, and communicate effectively across various teams and functions.

We are seeking an early engineer to join our Physical AI security platform team. This platform is powered by AI agents and supports the development of secure Physical AI and Vehicle Intelligence platforms, spanning the full product lifecycle. You will have significant influence over the direction and implementation of the system. The role involves building agentic security workflows for threat modeling, cyber risk analysis, threat detection, and investigation, as well as developing AI risk engines, intelligent intrusion detection, and security testing simulation engines.

$60k - $300k

Crusoe is seeking a Staff Product Security Engineer with deep AI/ML security expertise to enhance the company's security posture across applications, infrastructure, and distributed AI systems. This is a highly technical role focused on advanced penetration testing, AI/ML attack surface research, and developing secure-by-design guardrails for engineering teams. The role operates at the intersection of offensive security, AI systems, and production engineering, with end-to-end ownership of security outcomes and influence over system design across the organization.

$250k - $285k

Inworld is seeking an ambitious and capable Staff/Principal Backend Engineer to join their team and contribute to the advancement of the Inworld AI platform. This role will involve working on exciting new products, including the Inworld Router, an intelligent routing layer for LLMs, and API-based model services for TTS/STT. You will tackle complex infrastructural projects, focusing on platformization, development tools, and system-wide billing. The position emphasizes rapid iteration, building novel platform capabilities, and optimizing for real-time performance in consumer AI applications. Collaboration with ML teams is integral to the role, as AI and ML are critical to the platform's vision.

Inworld is seeking an ambitious and capable Staff/Principal Backend Engineer to join their research lab and contribute to the advancement of their AI platform. This role will focus on developing and scaling core systems for exciting new products, including an intelligent routing layer (Inworld Router) that supports over 200 LLMs, real-time API services, and API-based model services like TTS/STT with voice cloning. The position involves tackling complex infrastructural projects, platformization, and system-wide billing, with a strong emphasis on collaboration with ML teams to drive learning and adaptability. This is an individual contributor role focused on direct technical contribution.

$280k - $350k

OpenAI

Online Data builds and operates Habitat, a core online database platform for OpenAI's products. This system handles high-QPS, latency-sensitive workloads across regions, with end-to-end ownership of provisioning, developer experience, APIs, scaling, reliability, data movement, privacy enforcement, and future storage backends. The role involves designing and building core abstractions, owning major surface areas, improving performance and cost efficiency, and building developer-first tooling. You will collaborate closely with internal teams, participate in on-call rotations, and focus on solving complex distributed systems problems at massive scale.

OpenAI

At OpenAI, we are seeking a software engineer to help build out our trust and safety capabilities, ensuring the safety, robustness, and reliability of AI models and their deployment. In this role, you will work with our engineering team to design and implement systems that detect and prevent abuse, promote user safety, and reduce risk across our platform. You will be at the forefront of our efforts to ensure that the immense potential of AI is harnessed in a responsible and sustainable manner.

AI needs a new infrastructure layer, and we're building it at Modal. Our serverless platform provides instant GPU access, sub-second container starts, and native storage, enabling customers to serve low-latency inference, fine-tune models, and access production-ready sandboxes at scale. We are seeking strong engineers with experience and interest in designing, building, and maintaining these novel, high-performance systems.

Mistral AI

Mistral is on a mission to democratize AI by producing frontier intelligence for everyone, developed in the open. We are a dynamic, collaborative team passionate about AI and its potential to transform society, with diverse teams distributed across Europe, the USA, and Asia. We develop models for enterprise and consumers, focusing on systems that change business operations and integrate into daily lives, while also releasing frontier models open-source. We are hiring experts in the training of large language models and distributed systems to join our pioneering company shaping the future of AI.

Mistral AI

Mistral is on a mission to democratize AI by producing frontier intelligence for everyone, developed in the open. We are a dynamic, collaborative team passionate about AI's potential to transform society, with diverse teams distributed globally. We develop models for enterprise and consumers, focusing on systems that change business operations and integrate into daily lives, while also releasing frontier models open-source. We are hiring experts in the training of large language models and distributed systems to join our pioneering company shaping the future of AI.