Python Jobs

We are seeking an AI Infrastructure Engineer to join our expanding team. In this role, you will collaborate closely with our Inference and Research teams to construct, deploy, and enhance our large-scale AI training and inference clusters. Our work involves Kubernetes, Slurm, Python, C++, PyTorch, and primarily operates on AWS.

We are seeking an engineer to join our team responsible for building and running the inference engine behind Perplexity's queries. This role involves deploying dozens of model architectures at scale, managing tight latency and cost budgets, and working with a stack including Rust, Python, CUDA, and CuTe DSL. You will contribute to supporting new models, migrating GPU kernels, developing a Rust-native serving runtime, optimizing performance, and enhancing reliability and observability.

We are seeking an AI Inference Engineer to join our dynamic team. This role is central to Perplexity's operations, as you will build and manage the inference engine that powers every query. You will deploy a variety of model architectures at scale, focusing on meeting stringent latency and cost requirements. Our technology stack includes Rust, Python, CUDA, and the CuTe DSL.

Within is seeking an AI Front-end Engineer who excels at the intersection of product design and front-end engineering. As an engineer first with exceptional design sensibility, you will define and implement the "look and feel" of AI-native workflows, ensuring our complex enterprise tools are as intuitive as consumer apps. We value your portfolio and track record of shipping over formal degrees.

Replit

Replit is seeking a Premium Support Engineer to be the primary point of contact for their highest-value customers, providing expert and timely technical support. This role involves handling complex product issues, guiding customers through critical incidents, and ensuring a high standard of quality and speed in all interactions. The engineer will play a key part in evolving support strategies, adapting to new products and customer expectations, and leveraging AI-assisted workflows. The position requires a blend of deep technical troubleshooting and clear, confident communication to keep users productive.

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 the best work of your career alongside like-minded individuals, Harvey is the place to be.

$193k - $290k

Perplexity is seeking a Search Machine Learning Engineer Intern to contribute to the development of next-generation search technologies, specifically focusing on retrieval and ranking. This internship offers a hands-on opportunity to collaborate with experienced engineers, enhance search quality, experiment with novel models, and implement features that directly influence user search and information discovery experiences. The program is designed for a 12-24 week full-time engagement, conducted in person at our London office.

$12k - $24k

Mistral AI

Mistral AI is seeking a Research Engineer focused on Data Infrastructure to architect and build the backbone of our frontier model training and fine-tuning ecosystem. This role involves designing and scaling massive compute fleets and storage systems for high performance and scalability, with a vision towards exabyte-scale architecture. You will contribute to a strategic transition from legacy scheduling to modern orchestration, implementing sophisticated multi-cluster orchestration and cloud-bursting capabilities. The position requires full lifecycle ownership, from architecting migrations away from legacy orchestrators to implementing production-grade pipelines and participating in on-call rotations for critical training jobs.

Synthesia is seeking a Principal Engineer to join their ML Platform team. This role focuses on building and operating the systems that enable researchers and product teams to train, serve, and deploy generative models efficiently and reliably. The team's work encompasses research infrastructure, production serving systems, internal tooling, and platform interfaces, with a growing emphasis on automation and agent-oriented workflows. This is a hands-on individual contributor position with significant ownership, where you will influence the evolution of the ML platform as it scales.

Inworld is seeking a Staff/Principal Machine Learning Engineer to join their research lab focused on building top-ranked real-time voice models. These models power large consumer-facing AI applications across various sectors. The role involves optimizing real-time inference, developing best-in-class APIs and products, and contributing to the research and development of state-of-the-art models. The ideal candidate is a fast learner who thrives in ambiguity and can demonstrate a strong portfolio of built, broken, and understood systems. This position emphasizes impact, shipping stable code, and a deep understanding of the underlying logic behind engineering decisions.

Inworld is seeking a Staff/Principal Machine Learning Engineer to join their research lab focused on building top-ranked real-time voice models. These models power large consumer-facing AI applications across various sectors, reaching hundreds of millions of end-users. The role involves optimizing real-time inference, developing state-of-the-art models, and creating best-in-class APIs and products. The ideal candidate thrives in ambiguity, learns quickly, and can demonstrate a strong track record of building, breaking, and understanding complex systems. This position emphasizes impact, shipping stable and reliable systems, and a deep understanding of the underlying logic behind engineering decisions.

£140k - £200k

Inworld is a research lab building top-ranked real-time voice models used in large consumer-facing AI applications. We are seeking a Senior/Lead Machine Learning Engineer to optimize real-time inference and create best-in-class APIs and products. This role involves tackling complex, ambiguous problems and driving impact through shipped, stable systems. We value engineers who are comfortable with ambiguity, have a bias for action, and obsess over performance, latency, and reliability as core product features.

Inworld is seeking a Senior / Lead Machine Learning Engineer to join our team in Germany. We are a research lab building top-ranked real-time voice models used in large-scale AI applications across various sectors. Our work involves research, development, optimizing real-time inference, and creating best-in-class APIs and products. We are looking for fast learners with a strong ability to build, break, and understand systems, who thrive in ambiguity and can demonstrate their past work. This role emphasizes full-cycle ownership, taking models from research to production-ready serving.

Inworld is seeking a Staff/Principal Machine Learning Engineer to join their team in Mountain View, USA. This role focuses on optimizing real-time inference for state-of-the-art AI models, which power large consumer-facing applications. The ideal candidate will have a strong background in systems programming and a proven ability to take models from research to production, ensuring reliability and performance. The company values engineers who can navigate ambiguity, drive impact, and deeply understand the underlying logic of their work, fostering a collaborative and fast-paced environment.

$270k - $500k

Fal

We are seeking a Security Engineer, Infrastructure to safeguard the core systems powering fal.ai's platform, including GPU compute, multi-cloud environments, networking, and data pipelines. This role involves hands-on, systems-oriented work across the full stack, from cloud and Kubernetes to identity, networking, and secrets. You will be responsible for designing and implementing scalable security controls at the intersection of security, infrastructure, and distributed systems, ensuring the integrity and safety of our high-performance AI platform.

Crusoe is seeking a Senior Systems Engineer to play a key role in executing the company's Enterprise AI Strategy. This role involves designing and building agentic AI systems to move the organization from simple information retrieval to orchestrated, multi-system automation. You will operate at the intersection of AI, enterprise systems, and integration platforms, building scalable agent workflows, enabling a citizen developer ecosystem, and establishing the technical foundations for an AI-powered operating model.

$190k - $230k

Perplexity is seeking an IT Systems Administrator to join our San Francisco office. This is a high-impact role focused on building and automating the technology infrastructure that supports our fast-growing company. You will leverage Perplexity's AI tools to create automations, custom skills, and IT workflows that reduce repetitive tasks and improve efficiency. The goal is to move beyond simply responding to tickets and instead proactively eliminate them through intelligent systems and automation.

thinkingmachines

Thinking Machines Lab is seeking a Software Engineer focused on security to ensure their AI products are secure by default while enabling rapid product iteration. This role involves embedding with product and research teams to integrate security into the design and development process, as well as building tools and automation to maintain system safety at scale. The company is dedicated to advancing collaborative general intelligence and empowering users with AI tools tailored to their needs.

$350k - $475k

thinkingmachines

Thinking Machines Lab is seeking generalist infrastructure and systems engineers to build the core systems powering their foundation models and support internal research and product development teams. This high-impact role involves architecting and scaling critical infrastructure across the full technical stack, solving complex distributed systems problems, and building robust, scalable platforms. You will work directly with researchers to accelerate experiments, improve infrastructure efficiency, and enable key insights across models, products, and data assets.

$350k - $475k

Perplexity is looking for a skilled Offensive Security Engineer to join its security team. This role involves taking an adversarial approach to protect Perplexity's infrastructure, applications, and AI systems. You will be responsible for planning and executing red team operations, penetration tests, and attack simulations across various environments, including cloud infrastructure, web and mobile applications, and the AI/ML pipeline. The goal is to identify vulnerabilities before malicious actors do and collaborate with engineering teams to ensure effective remediation.