Process EngineerSubstrate is tackling a critical technological challenge in the United States. Positioned at the forefront of advanced manufacturing and innovative physics, we are pioneering technologies that will revolutionize the semiconductor sector and enhance America's position as a global technology leader. Our team comprises top-tier scientists, engineers, and technical professionals dedicated to developing state-of-the-art technology for the United States.Job SummaryAs a Process Engineer, you will play a vital role in prototyping essential components of our platform through advanced process development and materials characterization. This position involves hands-on engagement in various cleanroom and user facilities throughout the San Francisco Bay Area, where you will perform a combination of micro- and nanofabrication alongside material and structural characterization. Your responsibilities will encompass numerous nanofabrication methods, including but not limited to lithography, wet and dry deposition, and etching techniques.You will also be instrumental in the establishment of Substrate’s internal research facilities, contributing significantly to the early-stage development and testing that is crucial to our ambitious mission of reshaping the semiconductor landscape for years to come.

Join Our Team as a Senior Process EngineerAt Substrate, we are tackling one of the most crucial technological challenges facing the United States today. Positioned at the forefront of advanced manufacturing and innovative physics, our mission is to develop groundbreaking technologies that will revolutionize the semiconductor industry and fortify America’s technological leadership. We pride ourselves on our team of world-class scientists, engineers, and technical experts dedicated to crafting technology for the future.Job OverviewAs a Senior Process Engineer, you will play a pivotal role in conceptualizing and prototyping essential components of our platform through advanced process development and materials characterization. This hands-on position involves working in multiple cleanrooms and user facilities around the vibrant San Francisco Bay Area while also leading the efforts of fellow team members. You will oversee critical aspects of our fabrication process, engaging in both micro- and nanofabrication as well as characterizing the materials and structures you create. This role will encompass various nanofabrication techniques, such as lithography, wet and dry deposition, and etching.Additionally, you will contribute significantly to the establishment of Substrate’s internal research facilities. Your expertise will be instrumental in early-stage development and testing, which are vital to our ambitious mission of reshaping the semiconductor landscape for years to come.

Senior Electromechanical EngineerJoin Substrate, a pioneering force in addressing critical technological challenges in the United States. We stand at the forefront of advanced manufacturing and innovative physics, developing cutting-edge technologies that are set to transform the semiconductor industry and fortify America's technological leadership. Our team comprises world-class scientists, engineers, and technical experts dedicated to building the future of technology for the nation.As a Senior Electromechanical Engineer, you will spearhead the design and development of next-generation high-precision electrostatic chucks (ESCs) that will drive innovations within semiconductor manufacturing. This role presents an extraordinary opportunity to work at the cutting edge of semiconductor technology, collaborating with a talented team to tackle complex technical challenges and deliver top-tier solutions.

Standard Cell Design LeadJoin Substrate, a pioneering force in addressing critical technological challenges in the U.S. We are at the forefront of advanced manufacturing and innovative physics, dedicated to reshaping the semiconductor landscape and enhancing America's technological prowess. Our team comprises world-renowned scientists, engineers, and technical experts committed to creating transformative technology.As the Standard Cell Design Lead, you will spearhead the development and optimization of standard cell libraries while overseeing cell characterization and library validation initiatives. This role demands a profound knowledge of digital cell design, layout, and timing characterization, along with a robust understanding of library requirements for digital design workflows. You'll collaborate with various teams across multiple locations, including external fabrication facilities, in this full-time, onsite position.

Join Our Team as a Mechanical EngineerAt Substrate, we are tackling one of the most pressing technological challenges in the United States. Situated at the nexus of advanced manufacturing and innovative physics, our team is dedicated to developing groundbreaking technologies that will revolutionize the semiconductor industry and enhance America’s technological prowess.As a Mechanical Engineer, you will play a pivotal role in designing and developing ultra-high vacuum (UHV) systems, precision mechanisms, and high-speed motion systems. This is an exciting opportunity for candidates who possess extensive hands-on engineering experience in high-precision manufacturing settings and can navigate complex technical challenges independently. You will collaborate closely with scientists, engineers, and technical specialists across various projects and locations, including external production sites. This position is full-time and office-based.

About Mariana Minerals Mariana Minerals is a software-driven minerals company based in San Francisco. The team supplies essential minerals for the energy, artificial intelligence, and defense industries. By combining deep industry knowledge with advanced software, automation, and data strategies, Mariana Minerals is rethinking how minerals reach the world’s most critical sectors. Internship Overview The Process Engineering Intern will join the Pilot Plant Operations team at Mariana Minerals’ San Francisco headquarters. This internship offers the chance to work on meaningful, hands-on projects in mineral processing. Interns conduct benchtop experiments, support pilot plant test runs, and help develop new operational programs. Close collaboration with experienced engineers and subject matter experts is a core part of the experience. This role focuses on building and delivering new solutions, not just supporting existing work. What You Will Do Run experiments in both lab and pilot plant settings to help reduce risks in scaling up minerals processing. Develop, test, and refine approaches to improve product recovery, minimize equipment downtime, control costs, and support health and safety. Work with engineering, management, and software teams to create programs and tools that advance operational goals. Collaborate with cross-functional groups, including operations and analytical labs. Present findings and insights at the end of the internship. What We’re Looking For Current student or recent graduate in chemical engineering, metallurgy, materials science, or a related field. Strong grasp of process design, thermodynamics, and reaction engineering. Hands-on experience in laboratory, pilot plant, or commercial plant settings through coursework, projects, or previous internships. Skilled in experimental design, troubleshooting, and independent analysis of complex data. Clear technical writing, communication, and collaboration abilities. Comfortable adapting to new challenges and working in a changing environment. Why Mariana Minerals? Interns at Mariana Minerals join a mission-driven team working to transform the global sourcing and supply of critical minerals. Every contribution supports a larger vision for the future of the industry.

About UsAt Foundry Robotics, we are pioneering an AI-native robotics manufacturing enterprise dedicated to enhancing assembly and production capabilities for top-tier robotics firms and critical national-security hardware. Our vision is to create robots that construct robots, effectively transforming the landscape of manufacturing.We are on a mission to revolutionize the American manufacturing sector by prioritizing AI-driven solutions and assembly-focused strategies as a dual-use contract manufacturer. Our goal is to equip manufacturers with intelligent, efficient, and adaptable robotic systems that redefine productivity and quality. As a key member of our engineering team, your contributions will significantly influence our products, workplace culture, and overall success. Please note that this position requires 100% in-person work at our Mission District office in San Francisco.The RoleWe are seeking a Manufacturing Process Engineer who excels at transforming innovative ideas into practical production realities. You will be comfortable designing systems from the ground up and validating them directly on the factory floor. Your primary responsibilities will include defining the architecture of our robotic systems from initial concept through to full-scale production, developing assembly strategies, designing tooling, and creating workflows where they do not currently exist. You will establish production capabilities from scratch, making critical decisions concerning sequencing, fixturing, automation integration, and quality control. Your focus will be on driving rapid build-test-learn cycles to implement robust and scalable processes.Key ResponsibilitiesDesign and develop production processes from the ground up for autonomous robotic assembly systems, establishing how AI-driven hardware is manufactured at scale.Optimize assembly lines with a focus on throughput, yield, and scalability as production transitions from initial stages to high-volume outputs.Create and maintain process documentation, work instructions, SOPs, and control plans to enable repeatable and scalable manufacturing.Develop tooling and fixtures aimed at reducing variation, minimizing operator error, and supporting efficient assembly processes.Engage hands-on on the shop floor to validate processes, pinpoint bottlenecks, and iterate quickly alongside the team.Foster relationships with external vendors and contract manufacturers, providing valuable process insights and feedback during development.Collaborate across disciplines with mechanical, electrical, and robotics teams to ensure processes are designed with the entire system in mind.

Role overview The City and County of San Francisco is seeking an Associate Engineer to join the Environmental department. This position plays a part in citywide efforts to improve public health and meet sustainability targets. The work centers on supporting projects that benefit the community and the environment. What you will do Assist with planning, designing, and carrying out environmental initiatives Collaborate with colleagues on projects that make a direct impact in San Francisco neighborhoods Contribute to efforts that promote public health and advance sustainability throughout the city Location This role is located in San Francisco.

The City and County of San Francisco seeks a Senior Stationary Engineer to help operate and maintain stationary engines and mechanical systems in city facilities. This full-time position plays a key role in keeping heating, cooling, and power systems running smoothly for the community. What you will do Operate and maintain stationary engines and related equipment in municipal buildings Monitor system performance to keep heating, cooling, and power operations efficient Handle both routine and emergency maintenance tasks as they come up Work closely with colleagues to ensure continuous city services Requirements Solid understanding of mechanical systems and stationary equipment Dedication to safety and sustainable work practices Ability to contribute effectively within a team Experience supporting building infrastructure operations Location This role is based in San Francisco.

Join Our TeamAt Unity Technologies, we are on a mission to create a powerful, near real-time reporting platform that is essential for analytics and decision-making across our expansive ecosystem. We are in search of a talented Data Engineer who will play a pivotal role in architecting and implementing distributed data systems that enable this platform to operate at scale.In this dynamic role, you will design and construct high-throughput, low-latency data processing pipelines that support reporting functionalities for both internal teams and external clients. You will work at the forefront of distributed systems, stream processing, and cloud-native infrastructure, ensuring the reliability, correctness, and scalability necessary for a high-volume production setting.This is an impactful position where your engineering excellence, architectural vision, and ownership of production will be highly valued.

Join Plaud as a Backend Engineer and be part of an innovative team driving the future of technology. You will design, develop, and maintain scalable backend systems that enhance our product offerings and improve user experiences. This is an exciting opportunity to work with cutting-edge technologies and collaborate with talented professionals in a fast-paced environment.

About FluidstackFluidstack is revolutionizing the foundation of artificial intelligence by creating infrastructure that powers abundant intelligence. Collaborating with leading AI laboratories, government entities, and industry giants like Mistral, Poolside, and Meta, we are committed to facilitating compute capabilities at unprecedented speeds.Our mission is to accelerate the realization of Artificial General Intelligence (AGI). We are driven by a strong sense of urgency and a commitment to providing world-class infrastructure. Our focus is on ensuring our customers achieve their desired outcomes, and we take pride in the systems we create and the trust we cultivate. If you are passionate about purpose, dedicated to excellence, and eager to contribute to shaping the future of intelligence, we invite you to join our team.About the RoleAs Fluidstack continues to expand rapidly to cater to the needs of the foremost AI organizations globally, we are seeking a Senior Manager for Business Process Controls to ensure operational excellence aligns with our ambitious technical goals. You will be responsible for designing, implementing, and continuously enhancing the vital processes that drive our business, including customer onboarding, vendor operations, internal workflows, and cross-functional collaboration. Collaborating closely with Engineering, Finance, Sales, and Operations teams, you will work to eliminate inefficiencies, enhance operational efficiency, and establish scalable systems that facilitate Fluidstack's growth without disruptions. This role is highly impactful and visible, ideal for an individual who excels at the intersection of strategic planning and execution.

About EventualAt Eventual, we believe that every innovative AI application—from foundational models to self-driving vehicles—demands the ability to process vast amounts of images, video, and intricate data. Unfortunately, existing data platforms, such as Databricks and Snowflake, are designed for traditional spreadsheet-like analytics, not for the petabytes of multimodal data that truly drive AI advancements. This limitation leads teams to spend excessive time on fragile infrastructure, diverting them from essential research and product development.Founded in 2022, Eventual's mission is to revolutionize data querying, making it as intuitive as working with tables and robust enough to support production workloads. Our open-source engine, Daft, is specifically engineered for real-world AI systems. It effectively coordinates with external APIs, manages GPU clusters, and addresses failures that conventional engines cannot handle. Major companies like Amazon, Mobileye, Together AI, and CloudKitchens are already leveraging Daft for their critical workloads.Our team is composed of industry veterans from Databricks, AWS, Nvidia, Pinecone, GitHub Copilot, Tesla, and beyond, and we've quadrupled our size within just a year. With Series A and seed funding from notable investors including Felicis, CRV, Microsoft M12, Citi, Essence, Y Combinator, Caffeinated Capital, Array.vc, and prominent angel investors from the co-founders of Databricks and Perplexity, we are actively expanding our team. Join us—Eventual is only at the beginning of its journey.We are currently seeking passionate individuals to join our tight-knit team, who will work together in our San Francisco Mission district office four days a week.

At Databricks, we are driven by our mission to empower data teams to tackle the world's most challenging problems—whether it's realizing the next mode of transportation or accelerating medical advancements. Our dedication is to build and operate the premier Data and AI infrastructure platform, enabling our clients to harness deep insights from data to enhance their operations. We are on the lookout for a Senior Engineering Manager to join our Photon team, playing a pivotal role in defining the next generation of ultra-fast, scalable data processing solutions. In this role, you will lead a team of exceptional engineers working on Photon—the innovative query engine that powers Databricks' groundbreaking Lakehouse Platform. This is a unique opportunity to drive innovation on a grand scale, optimize data systems for tangible results, and collaborate with top experts in query optimization, execution, storage, and large-scale analytics. If you are passionate about empowering teams, architecting groundbreaking technologies, and accelerating analytics for millions of users, we invite you to join our team.

Join the San Francisco Public Library as a Stationary Engineer. Under general supervision, you will operate, maintain, troubleshoot, and repair various pumping, heating, ventilating, air conditioning, refrigeration, and auxiliary plant machinery and equipment across Library locations, including the Main Library, 27 branch libraries, and two support facilities. Your role will ensure all equipment and systems operate efficiently and safely while adhering to applicable safety standards.Key Responsibilities:Operate, maintain, and repair a diverse range of mechanical systems, ensuring safe and efficient functionality, potentially using computerized building management and maintenance systems.Conduct thorough inspections of machinery and equipment, ensuring compliance with safety protocols and operational efficiency.Maintain accurate logs of operational data, including gauge readings and water quality analyses, to uphold preventative maintenance standards.Manage the safe storage and handling of treatment chemicals, including potential hazardous materials, ensuring compliance with safety regulations.Communicate effectively with contractors, building tenants, and the public to fulfill your duties.Ensure security of the facilities and respond to emergencies as part of the response team.Perform control tests on water samples to maintain water quality and compliance with State regulations, including conducting water analysis as required.

Role overview Thunes seeks an IT Engineer in San Francisco to support the technology foundation of its international business. This position centers on designing, implementing, and maintaining IT infrastructure and systems that enable daily operations. What you will do Design and implement IT infrastructure that aligns with business requirements Maintain and troubleshoot systems supporting global operations Collaborate with teams throughout the company to enhance service delivery and system performance Location This role is based in San Francisco, California, United States.

About Flow EngineeringFlow Engineering is at the forefront of revolutionizing how humanity constructs its most intricate machines. Our platform is the premier tool for complex systems engineering, embraced by pioneering teams in sectors such as aerospace, defense, automotive, aviation, and robotics. If a company is aiming for the Moon, developing fusion energy, or planning the first interplanetary settlement, they are likely utilizing Flow Engineering to achieve those ambitious goals.We are proudly backed by Sequoia Capital, with notable angel investors including Patrick and John Collison (Stripe), David Helgason (Unity), and Kyle Parrish (Figma).About the RoleAs one of our pioneering Forward Deployed Engineers, you will operate at the crucial intersection of sales, engineering, and customer engagement. Your role involves comprehending how advanced hardware teams operate, guiding deployments, and facilitating adoption, ensuring that our customers are equipped with the insights and tools necessary to attain significant results.This position is perfect for individuals who have a background in hardware engineering and have a passion for collaborating with customers to solve complex challenges. You will empower leading hardware companies to transform their operational methodologies.What You’ll DoOwn the Technical Win: You will play a vital role in the sales process, driving custom demos and managing trial/POC execution, which is critical for securing new business for Flow Engineering.Understand and Map Customer Workflows: Collaborate with clients to gain a comprehensive understanding of their workflow, address pain points, and prioritize solutions tailored to their needs.Conduct Technical Enablement Sessions: Identify and showcase how Flow can enhance the customer’s development process through workshops, training, and collaborative solution sessions.Shape Our Roadmap: Act as the liaison between our customers and the engineering team to develop innovative solutions. Your insights will be essential in crafting the future roadmap of our product.Establish the GTM Foundation: Assist in developing and defining Flow’s activation strategies for key customers. You will contribute to the design of our technical GTM playbook, implementation guides, and training materials for future team members.About YouSolid Software Engineering Fundamentals: Proficient in designing, testing, and operating services at scale within a cloud environment.Excellent Communication Skills: Ability to convey technical concepts effectively to both technical and non-technical audiences.Customer-Centric Focus: Passionate about collaborating with customers and driven to solve their challenges.Proactive Problem-Solving: Ability to anticipate and address customer needs before they arise.

About HyperspellHyperspell is revolutionizing the Memory & Context Layer for AI Agents.AI agents are brilliant yet lack context.While AI agents excel in standardized testing, they struggle with real-world applications. Today's cutting-edge agents lack the contextual understanding that humans naturally acquire through diverse interactions. This context evolves with their tasks.Hyperspell empowers AI agents with contextual awareness by integrating with users' workspace data, creating a tailored memory and context layer.Our ValuesWe are committed to shaping the future through bold innovations. Our goal is to establish ourselves as the indispensable context layer for organizations, enabling all their AI agents to connect seamlessly. We embark on this journey not because it is easy, but because it is significant.We prioritize care — for our customers, their success, the future of AI, and most importantly, for one another. As we build the frontier of AI, we strive to be one of the most technologically advanced yet profoundly human companies in history — a place where we can enjoy shaping the future together.Our InvestorsOur vision is supported by esteemed investors such as Y Combinator, Afore Capital, Scribble Ventures, and Pioneer Fund. Our angel investors include leading figures from OpenAI, Anthropic, xAI, and DeepMind, alongside respected founders from Silicon Valley like Siqi Chen (Runway) and Julian Weisser (On Deck).Our FoundersFounded in 2024 by Conor Brennan-Burke and Manu Ebert, Hyperspell is driven by experienced leaders. Conor previously spearheaded growth at Checkr, overseeing a $30 million API product portfolio and earning the title of 'the most helpful founder in YC'.Manu brings over 15 years of expertise in machine learning and AI, having successfully sold two companies and led high-growth engineering teams at Airbnb. Interestingly, he acquired his first .ai domain in 2014, needing to send a fax to the domain authority in Anguilla to do so.About the RoleAs our founding platform engineer, your mission will be to construct the infrastructure that makes Hyperspell feel magical — swift, dependable, and effortlessly scalable. You will be responsible for the foundation upon which our entire product is built, ensuring that when customers entrust us with their data, we uphold their trust.

About daydreamAt daydream, we are revolutionizing the SEO landscape by developing the world's most advanced SEO agent, complemented by a team of top 1% human experts. Our goal is to manage organic search intricately, freeing our clients from the burdens of hiring specialized teams, evaluating multiple tools, or managing external agencies.In today's competitive environment, excelling in search demands the production of expert-level content at scale, alongside constant adaptation to shifts in ranking systems and user behavior. Traditional tools merely provide metrics without actionable insights, while agencies rely on cumbersome manual workflows that fail to generate compounding growth. Even well-resourced teams often find it challenging to translate sustained efforts into consistent results.daydream simplifies this landscape by consolidating fragmented tools and external vendors into a single coherent system that continuously plans and executes SEO strategies. Our SEO agent takes charge of analysis, planning, and content generation, while seasoned Growth Leads translate this work into actionable outputs—shipped pages, technical adjustments, and updated priorities—holding accountability for performance over time.We have successfully raised over $20M from notable investors including First Round Capital, Basis Set Ventures, WndrCo, and SOMA Capital, and our growth is supported by industry leaders from Notion, Airtable, Webflow, and Dropbox, such as Lenny Rachitsky and Eli Schwartz, author of Product-Led SEO.The TeamYou will collaborate closely with a dedicated, senior team across engineering, design, and growth:Shravan (CTO), who previously served as an Engineering Lead at Flixed and a Software Engineer at Facebook, focusing on large-scale web scraping for Facebook Jobs and Meta Reality Labs.Vishruth (Founding Applied AI Engineer), a former Data Scientist at Klaviyo specializing in NLP, with a robust research background from Cornell.Daniel (Founding Applied AI Engineer), who previously worked as a Data Engineer on Tesla’s Autopilot team, specializing in large-scale data systems and applied machine learning, and was formerly the Lead Data Engineer at Replit.Tom (Founding Designer), who led product design at Blockless and plays a significant role in UI engineering.You will also interact directly with Growth Leads, senior SEO practitioners who manage the system daily and provide invaluable feedback on AI performance in real-world applications.Your ImpactIn your role as a Staff Engineer at daydream, you will provide vital technical leadership across the product while remaining deeply engaged in hands-on execution. You will closely collaborate with the CTO to define system architecture, guide project execution, and elevate quality standards throughout the engineering organization.