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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.

Harvey

Harvey is transforming legal and professional services by combining frontier agentic AI, an enterprise-grade platform, and deep domain expertise. This is a rare opportunity to help build a generational company at an inflection point, with strong product-market fit and world-class 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 Site Reliability team, you will ensure the reliability, scalability, and performance of our legal AI platform, owning the systems that keep our platform fast, secure, and always on. Your work will be critical in scaling across 50+ regions and automating mission-critical operations to ensure Harvey remains resilient as we grow. If you are passionate about building robust systems and reducing complexity through automation, we encourage you to apply.

Hebbia is seeking a Forward Deployed Engineer to join their team. In this hands-on role, you will be embedded with strategic customers, building the final layer of Hebbia's AI platform to suit their specific workflows, data, and domain. You will write production code, ship it, and own it, acting as the crucial link between the platform and customer environments. This position is ideal for engineers who want to combine deep technical work with direct customer impact, seeing their code create value quickly. You will collaborate closely with the core engineering team on code reviews, architecture, and deployment, as well as with account teams to prioritize your efforts. The role requires working in person at our offices in NYC and SF.

$180k - $300k

Harvey

Harvey is transforming legal and professional services by combining frontier agentic AI, an enterprise-grade platform, and deep domain expertise. This is a rare opportunity to help build a generational company at an inflection point, with strong product-market fit and significant investor backing. 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, building, scaling, and strengthening the infrastructure that powers every user interaction with Harvey's AI platform. You will work in an environment balanced between innovation and operational excellence, ensuring the platform remains resilient and efficient as it scales.

Sierra is building a platform to enable companies to create better, more human customer experiences with AI. We are seeking a Software Engineer to join our team and focus on building the core systems that power AI agents. This role involves working on the Agent SDK, including the orchestration engine, runtime, and primitives that define how agents reason, take actions, and interact with users and systems. You will also design the agentic loop, defining the necessary primitives for steerable, verifiable, conversational, and adaptive agents, and improve retrieval and grounding systems to ensure agents provide accurate, trustworthy responses. Additionally, you will build evaluation systems to measure and improve agent quality over time.

Mistral AI

Mistral AI is seeking a DevSecOps Engineer to architect and maintain the security of its rapidly scaling AI infrastructure and application lifecycle. The role involves treating security as a seamless enabler for research and engineering teams, embedding robust security controls into CI/CD pipelines, infrastructure, and developer workflows without compromising deployment velocity. The company is a dynamic, collaborative team passionate about AI, democratizing it through open-source models and products, and aims to make a meaningful impact by shaping the future of AI.

OpenAI

OpenAI's Applied AI Engineering team partners with leading organizations to design, build, and deploy AI systems that deliver measurable business outcomes. This role involves combining deep technical judgment, hands-on engineering, and customer leadership to take ambitious ideas from use-case selection and architecture through prototyping, evaluation, production launch, and scale. You will write and debug code, build evaluation systems, resolve complex integrations, and guide decisions involving model behavior, reliability, latency, cost, safety, security, governance, and operational readiness. Success is measured by production systems, sustained adoption, and meaningful customer impact. This is a rare opportunity to work on consequential real-world deployments at the frontier of AI while directly influencing how OpenAI’s products evolve.

Replit

Join our Enterprise Platform team and build the infrastructure foundations that enable the world's largest organizations to run Replit within their security and compliance boundaries. As a Software Engineer on this team, you'll design and implement the deployment flexibility, networking capabilities, authorization systems, and data controls that enterprises require, from single-tenant architectures and private connectivity to custom policy enforcement and customer-managed encryption. You'll work at the intersection of cloud infrastructure and enterprise requirements, partnering with Platform Engineering, Security, and Sales to ship capabilities that unlock adoption at demanding organizations.

Harvey

Harvey is transforming legal and professional services by combining frontier agentic AI with an enterprise-grade platform. We are a fast-scaling company with strong product-market fit, seeking individuals who want to do the best work of their careers alongside driven colleagues. Our values are Decisiveness, Simplicity, and Job's Not Finished, emphasizing quick action, scalable solutions, and continuous improvement. As a Staff Database Engineer, you will define and evolve our global PostgreSQL database infrastructure. This leadership role involves setting technical strategy for our fleet, establishing standards for migration governance, driving multi-region scaling architecture, and ensuring data layer reliability. You will partner with senior engineers on roadmap decisions while also being hands-on in diagnosing and resolving critical issues.

$191k - $325k

Synthesia is seeking a Senior Engineering Manager to lead a team focused on driving user acquisition, activation, and revenue growth. This role involves breaking down complex projects into manageable stages, making strategic trade-offs, and partnering closely with product and data teams to maximize business outcomes. You will be responsible for scaling the team by identifying skill gaps, attracting and retaining top talent, and fostering a collaborative, high-velocity culture. The Growth team operates at the intersection of product, engineering, and data, rapidly shipping experiments and iterating based on measurable results, directly impacting user journeys and business performance.

Harvey

Harvey is transforming the legal and professional services industries by integrating frontier agentic AI with an enterprise-grade platform and deep domain expertise. This role offers a unique opportunity to contribute to a rapidly scaling, category-defining company that has already achieved strong product-market fit with over 1500 customers globally. The team operates with intensity, ownership, and a commitment to continuous improvement, driven by values of decisiveness, simplicity, and a 'job's not finished' mentality.

$276k - $325k

Crusoe is seeking a Senior Staff Software Engineer for the AI Model Lifecycle team to build a comprehensive managed platform for the entire application development lifecycle, with a specific focus on leveraging Machine Learning models, including Large Language Models (LLMs). This role is crucial in accelerating the abundance of energy and intelligence by powering the world's most ambitious AI workloads. You will join a team building the future of AI infrastructure, solving the bottleneck of power for AI compute with an energy-first approach. We are looking for problem-solving, opportunity-finding teammates with a sense of urgency who thrive on building the path forward.

$238k - $318k

Crusoe is seeking a Senior Software Engineer for their AI Model Lifecycle team to build a comprehensive managed platform for the entire application development lifecycle, with a specific focus on leveraging Machine Learning models, including Large Language Models (LLMs). This role is crucial in accelerating the abundance of energy and intelligence by powering ambitious AI workloads. The ideal candidate will be a problem-solving, opportunity-finding teammate with a sense of urgency, who believes in the scale of Crusoe's ambition and thrives on a path not fully paved.

$172k - $231k

Inworld is a research lab building top-ranked real-time voice models used in large consumer-facing AI applications across health, fitness, learning, therapy, companions, customer experience, and media. We are seeking a Staff/Principal Research Scientist to join our team. We are looking for individuals who learn fast, thrive in ambiguity, and can demonstrate their built, broken, and understood work, rather than a specific resume template. We value impact and shipping results, with a focus on first-principles engineering and mission ownership.

£140k - £200k

Inworld is a research lab building top-ranked real-time voice models used in large consumer-facing AI applications. We focus on research and development of state-of-the-art models, optimizing real-time inference, and creating best-in-class APIs and products. We are looking for strong individuals who learn fast, thrive in ambiguity, and can demonstrate their past work, rather than specific resume templates. We value impact and shipping results, with a bias for action and first-principles thinking.

Inworld is a research lab building top-ranked real-time voice models used in large consumer-facing AI applications. We focus on research and development of state-of-the-art models, optimizing real-time inference, and creating best-in-class APIs and products. We are looking for strong individuals who learn fast, thrive in ambiguity, and can demonstrate their built projects, broken systems, and understanding. We value impact and shipping results, with a bias for action and first-principles thinking.

Inworld is seeking a Staff / Principal Platform Engineer to take end-to-end ownership of building, securing, and scaling our AI products. This role involves being the driving force behind our cloud infrastructure, partnering with engineers to deploy and evolve services across major cloud providers using tools like Terraform and ArgoCD. You will identify needs and drive initiatives forward, directly shaping how the company operates and innovates.

$280k - $350k

Applied Intuition is seeking a highly focused Cloud Security Engineer to play a crucial role in securing our infrastructure across diverse multi-cloud environments (AWS, Azure, GCP, OCI), with a heavy emphasis on Kubernetes cluster hardening. You will establish robust guardrails, enforce Identity and Access Management policies, and maintain our Cloud Security Posture Management (CSPM) to prevent insecure deployments and ensure continuous compliance. This role involves working alongside our Corporate Security & Infrastructure team to secure our cloud footprint.

$60k - $300k

Sierra is building a platform to enable companies to create better, more human customer experiences with AI. We are a primarily in-person company based in San Francisco, with growing offices globally. Our co-founders have extensive experience from leading tech companies like Salesforce, Facebook, and Google. We are seeking a Security and Compliance Manager to act as a primary point of accountability for customer trust enablement, contributing to AI governance, and ensuring security and compliance requirements are embedded into our product and operations.

Harvey

Harvey is seeking a People Business Partner to support its North America Go-To-Market (GTM) teams, including sales, customer success, and Legal Engineering. This role involves partnering closely with GTM leaders to help them build and scale high-performing teams, navigate growth, develop their organizations, and address people-related challenges in a fast-moving environment. The position reports to the Head of People Business Partners and requires a thoughtful communicator who builds trust quickly, possesses sound judgment, and is comfortable with evolving priorities.

$170k - $230k