Platform Engineer - AI Infrastructure (San Francisco)

Are you looking for an exciting new opportunity? Join a fast-growing, Series A technology company building the next hyperscaler for AI agents, delivering a cloud platform where AI applications can create and run other software at scale. The business is already trusted by 88% of Fortune 100 companies, supports over 1 million monthly downloads, and has powered almost 300 million sandbox environments, reflecting rapid adoption and real-world impact. This highly technical role sits at the heart of the core product, with responsibility for designing and optimising secure, isolated, and ultra-high-performance cloud runtimes. Backed by over $32M in funding, this is a rare opportunity to help define the foundational infrastructure shaping the future of AI development. Apply today! Responsibilities: Design and build the core E2B backend and cloud infrastructure powering AI software creation. Work directly with VM hypervisors (Firecracker, gVisor) and Linux systems to build high-performance runtimes. Develop and optimize sandboxes for LLMs and implement secure, isolated networking solutions. Shave off every millisecond by monitoring resources and optimizing sandbox performance at scale. Solve complex distributed systems challenges, leveraging Kubernetes or Nomad for orchestration. Collaborate closely with Distributed Systems Engineers and work directly with users. Skills/Must have: 5 years of experience in Golang, Python, and TypeScript. 5 years building and operating infrastructure at scale, specifically distributed systems. 5 years of Linux administration with deep knowledge of internals (kernel, namespaces, networking, containers). Experience working with VM hypervisors (Firecracker, gVisor) or similar container runtimes. Experience with Kubernetes or Nomad. Proactive, detail-oriented, comfortable taking ownership, and excited to work in person from San Francisco. Benefits: Opportunity to build the next hyperscaler platform for AI agents from the ground up. Significant freedom and ownership (taking projects from 0 ? 1) in a Series A startup with strong funding ($32M raised). Work on challenging problems related to ultra-low latency and secure sandboxing. Join a high-growth environment with customers like Perplexity and Hugging Face. Salary: $180,000 - $250,000 Equity J-18808-Ljbffr

Engineering Manager, AgentOps New York, NY Apply → (San Francisco)

Join the team shaping the future of AI at Scale. At Scale AI, our mission is to accelerate the development of AI applications. For 8 years, Scale has been the leading AI data foundry, helping fuel the most exciting advancements in AI, including: generative AI, defense applications, and autonomous vehicles. With our recent Series F round, we’re accelerating the abundance of frontier data to pave the road to Artificial General Intelligence (AGI), and building upon our prior model evaluation work with enterprise customers and governments, to deepen our capabilities and offerings for both public and private evaluations. About Data Engine Our Generative AI Data Engine powers the world’s most advanced LLMs and generative models through world‑class RLHF (Reinforcement Learning with Human Feedback), human data generation, model evaluation, safety, and alignment. The data we are producing is some of the most important work for how humanity will interact with AI. About our AgentOps team The vision for the AgentOps team is to build the best Agent Development Platform in the AI Industry. Agent Development is in its nascent stages in a rapidly changing industry, with limited tooling making it hard for agent developers to manage agent lifecycles. As a team that has a front‑row seat to what Enterprise customers need and want, we want to build an opinionated but flexible platform for all Agent operations (“AgentOps”), including building, deploying, monitoring, evaluating and improving agents to solve customer needs. With the AI industry currently moving towards RL workflows that need verifiable rewards, we further want to gear this platform towards knowledge capture that create compounding effects to make Agents more effective and capable. We want to create a virtuous data flywheel where agents built using this platform see continuous performance improvements and increase customer value over time. We are a rapidly growing team with ambitious goals, and are looking for motivated individuals to join us to make an impact in a green‑field domain. Responsibilities Manage the engineering team and drive technical delivery Comfortable working cross functionally, whether that be internal or external customers Work across the entire product lifecycle from conceptualization through production Build features end‑to‑end: back‑end, system design, debugging and testing Deliver experiments at a high velocity and level of quality to engage our customers Influence the culture, values, and processes of a growing engineering team Inspire and mentor engineers Collaborating with cross‑functional teams to define, design, and ship new product features and experiences Requirements At least 5 years of relevant experience and at least 2 years of experience managing engineers is preferred Proven success in leading, managing, and developing high‑performing Engineering teams Expertise in identifying product engagement patterns and trends for large scale consumer products Track record of shipping high‑quality products and features at scale Desire to work in a very fast‑paced environment Ability to turn business and product ideas into engineering solutions Excellent problem‑solving skills, and be able to work independently or as part of a team. Excited to join a dynamic, hybrid team in either San Francisco or New York City. Compensation Packages Compensation packages at Scale for eligible roles include base salary, equity, and benefits. The range displayed on each job posting reflects the minimum and maximum target for new hire salaries for the position, determined by work location and additional factors, including job‑related skills, experience, interview performance, and relevant education or training. Scale employees in eligible roles are also granted equity based compensation, subject to Board of Director approval. Your recruiter can share more about the specific salary range for your preferred location during the hiring process, and confirm whether the hired role will be eligible for equity grant. You’ll also receive benefits including, but not limited to: Comprehensive health, dental and vision coverage, retirement benefits, a learning and development stipend, and generous PTO. Additionally, this role may be eligible for additional benefits such as a commuter stipend. For pay transparency purposes, the base salary range for this full‑time position in the locations of San Francisco, New York, Seattle is: $216,200 — $270,250 USD PLEASE NOTE: Our policy requires a 90‑day waiting period before reconsidering candidates for the same role. This allows us to ensure a fair and thorough evaluation of all applicants. About Us At Scale, our mission is to develop reliable AI systems for the world’s most important decisions. Our products provide the high‑quality data and full‑stack technologies that power the world’s leading models, and help enterprises and governments build, deploy, and oversee AI applications that deliver real impact. We work closely with industry leaders like Meta, Cisco, DLA Piper, Mayo Clinic, Time Inc., the Government of Qatar, and U.S. government agencies including the Army and Air Force. We are expanding our team to accelerate the development of AI applications. We believe that everyone should be able to bring their whole selves to work, which is why we are proud to be an inclusive and equal opportunity workplace. We are committed to equal employment opportunity regardless of race, color, ancestry, religion, sex, national origin, sexual orientation, age, citizenship, marital status, disability status, gender identity or Veteran status. We are committed to working with and providing reasonable accommodations to applicants with physical and mental disabilities. If you need assistance and/or a reasonable accommodation in the application or recruiting process due to a disability, please contact us at [email protected]. Please see the United States Department of Labor's Know Your Rights poster for additional information. We collect, retain and use personal data for our professional business purposes, including notifying you of job opportunities that may be of interest and sharing with our affiliates. We limit the personal data we collect to that which we believe is appropriate and necessary to manage applicants’ needs, provide our services, and comply with applicable laws. Any information we collect in connection with your application will be treated in accordance with our internal policies and programs designed to protect personal data. Please see our privacy policy for additional information. J-18808-Ljbffr

Staff Backend Engineer (San Francisco)

About the Company: World is a network of real humans, built on privacy-preserving proof-of-human technology, and powered by a globally inclusive financial network that enables the free flow of digital assets for all. It is built to connect, empower, and be owned by everyone. About the Team: World ID is a digital identity system and proof of humanity for everyone, designed to be a foundational identity protocol for the internet in the era of AGI. It is built to be self-custodial, secure, decentralized and open, setting new standards for privacy and transparency. At the heart of World ID are groundbreaking innovations in hardware and software—spanning distributed systems, cryptography, sensors, biometrics, machine learning and blockchain technology. As part of the team behind World ID, you’ll work on defining and building the decentralized platform that underlies World ID, product experiences and partner integrations. You\'ll help shape the future of technologies needed to realize this ambitious vision. About the Opportunity: As a Staff Software Engineer , you will focus on building core technologies and infrastructure to drive scale, utility and decentralization for World ID protocol and its ecosystem. Your work will span critical technology areas including issuance and registration of credentials, decentralized cloud platform for applications and authenticators lifecycle using MPC systems and blockchain, zero-knowledge proving systems, biometric verification and recovery systems, World network integration platforms and building products using technologies that would delight users. Your responsibilities include: Architecting and Building: You will take ownership of the design, development, and scaling for mission-critical software, including architecting decentralized, privacy preserving, secure, scalable and reliable backend systems. Technical Leadership: You will provide technical guidance to the engineering team and lead complex, cross-functional projects. Your work will ensure the team delivers elegant and effective solutions for a variety of novel challenges some of which have never been done before. Mentorship and Collaboration: You will mentor junior engineers and work closely with senior leadership, product managers and other XFN stakeholders to deliver impactful solutions that advance the World network. Strategic Impact: You will play a key role in shaping the technical roadmap and strategy for the World ID platform. You are expected to identify the most important tasks and drive them to completion. Your ability to collaborate and stay organized in a fast-paced environment is key. About you: You have a proven track record of designing and developing exceptional backend systems and solving complex problems, preferably with experience in distributed systems or identity management platforms. You are a fast learner who can quickly master and apply new knowledge and skills. You can communicate clearly and concisely, and your colleagues consistently vouch for your ability to collaborate effectively in ambiguous and changing environments. You are great at building software and are motivated by the challenge of realizing this ambitious vision. Requirements for this role Experience in senior technical leadership positions. Proven experience leading complex initiatives from start to finish. Demonstrated ability to mentor and guide engineering teams to help them level up and increase their impact. Deep expertise in designing and implementing software systems that are both reliable and scalable, with a strong grasp of fundamentals. Excellent communication skills, both written and verbal, for technical and non-technical audiences. By submitting your application, you consent to the processing and internal sharing of your CV within the company, in compliance with the GDPR. Pay transparency statement (for CA based roles): The reasonably estimated salary for this role at TFH ranges from $225,500 - $265,000 , plus a competitive long term incentive package. Actual compensation is based on factors such as the candidate\'s skills, qualifications, and experience. In addition, TFH offers a wide range of best in class, comprehensive and inclusive employee benefits for this role including healthcare, dental, vision, a 401(k) plan and match, life insurance, flexible time off, commuter benefits, professional development stipend and much more! J-18808-Ljbffr