Senior / Staff Software Engineer at fractional-ai | San Francisco

About SemgrepSemgrep stands at the forefront of code security, enabling developers to innovate seamlessly. We empower teams to identify, flag, and resolve real issues before deployment, utilizing adaptive security that evolves as development progresses. With Semgrep, code is secured in real-time, providing developers with the freedom to work swiftly while ma…

Join Code Metal AI's elite team, comprised of talents from MIT, OpenAI, and other esteemed organizations, as we lead the charge in pioneering large language models (LLMs) and advanced code generation techniques. Our innovative projects engage with top-tier chip manufacturers, leveraging cutting-edge AI to tackle significant, real-world challenges.This position serves as a critical link between two essential domains:Production Responsibilities:Establish and uphold resilient distributed training systems utilizing PyTorch (2+ years of experience required).Design and execute scalable data curation and quality assurance pipelines to ensure high-quality training datasets.Create orchestration tools that streamline complex workflows for large-scale AI model training and evaluation.Research Responsibilities:Lead the innovation in developing evaluation frameworks and reinforcement learning solutions, emphasizing recent advancements in Reinforcement Learning with Human Feedback (RLHF).Engage with cutting-edge research through open-source contributions and potential publications, focusing on applying RLHF to LLMs, particularly in code generation tasks.Qualifications:Minimum of 2 years of experience in distributed training, preferably using PyTorch.Strong foundation in reinforcement learning, with recent RLHF experience being highly preferred.Demonstrated ability to construct data curation and quality assurance pipelines.Experience in developing evaluation frameworks.Ideally, familiarity with both data pipeline and orchestration aspects.Eligibility for TS/SCI clearance.Preferred Qualifications:Contributions to open-source AI or ML initiatives.Published research or experience in relevant fields.Hands-on experience implementing RLHF to LLMs, especially for code generation.Experience in large-scale synthetic data generation.Benefits:Comprehensive healthcare plan with 100% premium coverage, including medical, dental, and vision.401k plan with 5% matching contribution.Unlimited Paid Time Off, along with Sick leave and Public Holidays.Flexible hybrid work arrangement.Relocation assistance for eligible employees.

Join David AI as a Staff Product EngineerAt David AI, we are pioneering the field of audio data research, applying a rigorous R&D methodology to create robust datasets that empower AI models. Our vision is to integrate AI seamlessly into daily life, with audio serving as the key medium. As the demand for high-quality training data grows, we position ourselves as the solution.Founded in 2024 by a team of seasoned engineers from Scale AI, we quickly garnered the trust of leading FAANG companies and AI labs. Our recent $50M Series B funding round was led by prestigious investors including Meritech and NVIDIA, underscoring our potential in the audio AI landscape.We pride ourselves on our dynamic, collaborative, and ambitious team, and we are on the lookout for exceptional talent in research, engineering, product, and operations to help us redefine audio AI.About Our Engineering TeamOur engineering team is at the forefront of innovation, building the infrastructure, platforms, and models that convert raw audio into valuable data for top-tier AI labs and enterprises. We are a close-knit group of product engineers, infrastructure experts, and machine learning specialists who are dedicated to establishing the first-ever audio data research organization.We operate with agility, taking ownership of our projects from inception to deployment, delivering production-ready solutions on a daily basis. Our engineers design real-time pipelines that manage vast amounts of speech data while deploying advanced generative audio models.Your RoleAs a Staff Product Engineer, you will spearhead our Product Engineering team, developing state-of-the-art products that enable our clients to harness audio data effectively for model training. You will collaborate with researchers to continually refine our data collection methodologies.Your ResponsibilitiesLead the development of full-stack features, rapidly iterating to deliver daily innovations to our users.Construct scalable systems that process terabytes of audio data and extract actionable insights.Deploy and assess LLM- and DSP-based solutions to enhance customer understanding of their data.Facilitate research iterations and deployment interfaces for data collection in collaboration with researchers and operations.

Role overview As a Product Engineer at liquid-ai, this position centers on shaping the company’s internal data and agent platform. The work involves designing, building, and launching solutions that reinforce the product lineup. Collaboration is key, with regular interaction across multiple teams. What you will do Partner with colleagues from various disciplines to define and deliver technical solutions Develop and maintain systems that support internal data and agent platform requirements Facilitate smooth integration between platforms and focus on optimizing system performance Location This role is based in San Francisco.

Join code-metal as a Senior Platform DevOps Engineer, where you will play a pivotal role in enhancing our cloud and on-premises infrastructure. You will be responsible for deploying, managing, and optimizing systems to ensure high availability and performance. This position offers an exciting opportunity to work with cutting-edge technologies and collaborate within a dynamic team.

Join us in combating the escalating wildfire crisis through cutting-edge AI and IoT technologies!About UsThe Challenge: In a world where every moment counts during fire emergencies, the growing intensity of wildfires, driven by climate change, poses a serious threat to communities. Traditional detection methods reliant on bystander reports can delay response times, allowing small fires to escalate into catastrophic disasters. Our mission is to equip fire authorities with advanced capabilities for swift detection, confirmation, and localization of fires, enabling timely intervention.About Pano AI: We are a dynamic start-up with over 150 team members, operating in a hybrid-remote model and based in San Francisco. As pioneers in early wildfire detection and intelligence, we empower fire professionals to respond more effectively and safely, ensuring they have access to the right tools and timely information needed to combat new ignitions before they escalate. Pano AI integrates sophisticated hardware, software, and artificial intelligence into a user-friendly web platform. By harnessing a network of ultra-high-definition 360-degree cameras positioned in strategic locations, along with satellite and other data sources, we create a real-time overview of potential threats, delivering actionable intelligence instantly.Recognized by TIME as one of the 100 Most Influential Companies of 2025, and featured by MIT Technology Review as one of the top 15 climate tech companies to watch in 2024, Pano AI is at the forefront of innovation. Fast Company also named us one of the Top 10 Most Innovative Companies in AI of 2023. Our achievements have been highlighted in notable publications such as the Wall Street Journal and Bloomberg.

Join Airwallex as a Staff Product Manager, AI GrowthAt Airwallex, we are revolutionizing the way global businesses manage their finances. As the leading unified payments and financial platform, our innovative infrastructure and software solutions empower over 200,000 companies worldwide, including notable names like Brex, Rippling, Navan, Qantas, and SHEIN. We provide integrated solutions for business accounts, payments, spend management, treasury, and embedded finance at a global scale.Founded in Melbourne, our diverse team of over 2,000 talented professionals spans across 26 offices globally. With a valuation of US$8 billion and support from world-class investors such as T. Rowe Price, Visa, Mastercard, and Sequoia, Airwallex is at the forefront of building the future of global financial platforms. If you’re eager to take on ambitious challenges and make a significant impact, we invite you to join our team.What We ValueWe seek builders who possess an entrepreneurial spirit and are driven by a desire for genuine impact, rapid learning, and ownership. You should bring a wealth of expertise, innovative thinking, and a passion for our mission and operating principles. Your ability to make swift decisions with sound judgment, coupled with your curiosity and analytical mindset, will be crucial as you navigate complex challenges.We value humility and collaboration, and you should be prepared to transform ideas into tangible products while ensuring tasks are completed efficiently. With a focus on leveraging AI, you will work alongside exceptional colleagues to address high-visibility issues and advance your career within the evolving landscape of global banking. If this resonates with you, let’s create the future together.ResponsibilitiesAs a Staff Product Manager for AI Growth, you will spearhead the strategy, roadmap, and execution for our next-generation AI-driven products. Your role will bridge the realms of fintech, AI/ML, and international financial operations, crafting intelligent automation solutions and customer experiences that transcend regions and languages. This strategic position holds the potential to redefine the future of global payments, treasury management, cards, and B2B financial operations.

About Us:At Parafin, our mission is to empower small businesses by providing them with the financial support they need to thrive. Small businesses play a crucial role in our economy, yet they often face challenges in accessing traditional banking services. We develop innovative technology that simplifies access to essential financial tools through the platforms they already use for sales. By partnering with industry leaders like DoorDash, Amazon, Worldpay, and Mindbody, we deliver fast and adaptable funding solutions, spend management, and savings tools to small business users via seamless integrations. Parafin manages the complexities of capital markets, underwriting, servicing, compliance, and customer support on behalf of our partners.Our team of dedicated innovators comes from top-tier organizations such as Stripe, Square, Plaid, Coinbase, and Robinhood, all driven by a shared passion for creating solutions that foster the success of small businesses. Backed by prominent venture capital firms including GIC, Notable Capital, Redpoint Ventures, Ribbit Capital, and Thrive Capital, Parafin is a Series C company with over $194M raised in equity and $340M in debt facilities.Join us in shaping a future where every small business has the financial tools they deserve.About the Position:As a Staff Product Engineer at Parafin, you will be the go-to expert for our implemented products. You will collaborate across design, product, and backend teams to ensure that everything functions seamlessly. Our focus extends beyond specifications; we prioritize understanding the purpose of features, identifying users, and solving their problems. You will take ownership of the entire frontend experience, addressing every transition, edge case, and state change that occurs between user actions and screen outputs.While familiarity with our specific stack is not required, a strong foundation in JavaScript and experience shipping real products using React and TypeScript are essential.Your Responsibilities:Create Scalable, High-Quality User Experiences: Collaborate with design to deliver exceptional UI/UX while also managing critical aspects such as page performance, cross-browser compatibility, and mobile responsiveness.Gain In-Depth Product Knowledge: Develop a strong understanding and perspective on the products we build. Work closely with product and design teams to contribute to the development process, rather than merely executing specifications.Monitor and Enhance Performance: Implement observability for user interactions, core web vitals, and overall perceived performance.Build Frontend and Product Infrastructure: Participate in the development of build systems, developer tools, and deployment pipelines. Advocate for improvements in the developer experience and create internal tools to streamline processes.

About Us:At Ambience Healthcare, we are pioneering an AI intelligence platform that brings a human touch back to healthcare, enabling health systems nationwide to achieve impressive returns on investment.Our innovative technology allows healthcare providers to concentrate on what matters most—their patients—by alleviating the administrative workloads that detract from their essential tasks. Ambience provides real-time, coding-aware documentation alongside clinical workflow support across various settings, including ambulatory, emergency, and inpatient care, at the leading healthcare institutions across North America.Our teams work with unwavering determination and a sense of ownership to create the best solutions for our health system partners. We value openness, positivity, and thoughtful engagement, and we hold each other to high standards because we understand the significance of the challenges we're tackling.Ambience has been recognized as the top firm for enhancing clinician experiences in the KLAS Research Emerging Solutions Top 20 Report, celebrated by Fast Company as one of the Next Big Things in Tech, acknowledged by Inc. as one of the best AI companies in healthcare, and named a LinkedIn Top Startup in 2024 and 2025. We are proud to be backed by Oak HC/FT, Andreessen Horowitz (a16z), OpenAI Startup Fund, and Kleiner Perkins—and we are only beginning our journey.The Role:As a Staff Software Engineer on the AI Platform team, you will be instrumental in designing, building, and maintaining the core infrastructure that supports healthcare providers using our platform daily in their patient care efforts. Being part of the OpenAI portfolio means you will work alongside some of the industry's foremost experts in AI and gain exposure to the latest advancements in technology.In the initial six months, you will lay the groundwork for long-term success by enhancing platform observability, reliability, and scalability. As a technical leader, you will oversee the entire lifecycle of significant technical projects within our AI stack, from system design to the deployment of your code.Our engineering positions operate in a hybrid model, requiring presence in our San Francisco office three days a week.What You’ll Do:Design and architect key product features using the latest AI advancements to create a seamless user experience.Proactively identify potential system bottlenecks and re-architect critical components before they impact our clients.Lead strategic product initiatives that enhance iteration speed while maintaining quality and reliability.

Join Connectly as we revolutionize conversational commerce in Latin America, focusing on the WhatsApp platform. With WhatsApp shopping becoming increasingly prevalent, we are dedicated to creating an AI-driven sales solution tailored for large retailers. Our mission is to streamline the purchasing process by ensuring real human interaction in response to WhatsApp inquiries.As a VC-backed Series B startup, we boast a diverse and talented team hailing from industry giants like Meta, Google, and Uber. Operating in a hybrid work environment, we maintain offices in Bogotá and San Francisco, with teams distributed across Latin America, including Brazil, where many of our innovative AI initiatives are developed.

Join DigitalOcean and take your career to new heights! Collaborate with a talented community dedicated to simplifying scalable cloud solutions. If you thrive in a dynamic environment that champions innovation and bold thinking, this is the place for you. We believe in collective success—learning, enjoying our work, and making significant impacts for creators and visionaries around the globe.We are on the lookout for a Staff Product Manager to spearhead the strategic vision, development, and execution of our GPU product offerings. This pivotal role places you at the crossroads of cutting-edge technology and market innovation, influencing the trajectory of our AI and computational science platform.As a Staff Product Manager, you will be the driving force behind our accelerated computing foundation. Your responsibilities will include defining our strategic approach to forthcoming GPU products and overseeing the acquisition, allocation, and deployment of GPU resources at scale, ensuring alignment with our overarching business goals and customer needs in AI/ML and HPC workloads.In this capacity, you will act as a hands-on strategist, integrating customer insights, market trends, and technical execution to guarantee the efficient delivery of value.

Join Parafin as a Staff Product Engineer and play a pivotal role in designing and building innovative products that make a difference. You will collaborate with cross-functional teams to deliver high-quality solutions that exceed customer expectations.

Join Anthropic as a Product Manager for Claude Code, where you will play a pivotal role in shaping the future of AI-driven software development. In this dynamic position, you will lead the evolution of Claude Code’s product suite, collaborating closely with internal stakeholders and customers to prioritize needs and implement enhancements. You will work alongside engineering, research, and cross-functional teams to ensure that Claude Code remains a leader in AI capabilities, delivering an unparalleled experience for developers. As we redefine the landscape of AI interaction, we seek a product manager with strong technical acumen, a passion for developer experiences, and a knack for strategic product vision. This is an opportunity to influence how developers leverage advanced AI technologies, driving innovation and excellence in the field.

About ValonValon is pioneering the AI-driven operating system for regulated finance, beginning with mortgage servicing. As a Series C company backed by a16z, we are revolutionizing sectors that many deemed too complex for innovation.Instead of relying on outdated legacy systems, we took an innovative route by developing and managing our own mortgage servicing business, overseeing over $110 billion in loans. This strategic choice has allowed us to gain profound insights into the complexities necessary to create software that genuinely functions in regulated industries.The results are remarkable. We've turned mortgage servicing from a 0% margin industry into one that boasts margins exceeding 60%, all while significantly enhancing customer satisfaction. Major enterprise contracts are now rolling out across the sector.ValonOS is our comprehensive platform that structures and automates every process, positioning us perfectly for the AI era. With a single system powered by rich data, our AI agents not only streamline tasks but also perpetually enhance overall operations. While mortgage servicing is our starting point, our vision extends to transforming regulated industries and beyond.Security at ValonOur clients entrust us with their most sensitive financial information, and our Security team’s foremost mission is to implement robust programs, processes, and automation to protect this data. We safeguard the infrastructure and data involved in processing billions of dollars in mortgage loans.Beyond protecting Valon’s internal systems, our Security team collaborates closely with Product and Engineering teams to design and deliver secure, scalable, and reliable features for ValonOS. We work cross-departmentally to embed security throughout the organization, regularly engaging with external security auditors, pentesting firms, and partners to continuously assess and enhance Valon’s security posture.Valon has offices in New York City and San Francisco, but we fully embrace remote work!

Product Engineer - Technical Staff MemberAt humans&, we are dedicated to pioneering human-centric AI solutions. Our mission revolves around reimagining artificial intelligence to prioritize human connections and interactions.We seek innovative product engineers who excel at conceptualizing and building products that enhance the interactions between people and technology. If you are passionate about this vision and have the skills to bring it to life, we would be excited to connect with you.Current Technology Stack:Backend: Convex (TypeScript)Frontend: Next.js, React Native (Expo), Tailwind

Join us at Greptile, where we are pioneering the development of agents that autonomously validate code changes. Currently, our AI technology reviews an astounding 1 billion lines of code monthly for over 3,000 companies, ensuring quality and compliance by identifying bugs and enforcing coding standards.Challenges We're Excited To TackleCan we create agents that learn coding standards through experience, much like a new employee would?How can we tailor pull request feedback for each customer using sample-efficient reinforcement learning to enhance the signal-to-noise ratio?What if we could deploy feature branches autonomously and utilize agents to run tests and identify bugs before they reach production?Our Growth PathOver 7,000 satisfied customersSecured $30 million in funding from esteemed investors including Benchmark, Y Combinator, Paul Graham, and Initialized CapitalOur TeamWe are a compact, highly skilled team with experience scaling critical engineering functions at industry leaders such as Stripe, Google, Figma, and LinkedIn.Desired QualificationsBachelor's degree in Computer Science or a related fieldExperience in research, particularly with machine learning, language models, or agent-based systemsProficient programming skills coupled with a strong intuition for product developmentKey ResponsibilitiesExplore and implement cutting-edge advancements in agents and language models to enhance our product capabilitiesFor instance, you may investigate multi-agent architectures, prototype a multi-agent code review system, and collaborate with the team to integrate successful solutions into our production environmentStay abreast of the latest research in large language models, information retrieval, and developer tools

About ArcadeArcade is pioneering the world’s first AI-driven platform for creating physical products, where creativity meets reality. Our innovative platform empowers users to design, purchase, and sell custom, manufacturable products using natural language and generative AI. We believe in democratizing creation, allowing anyone to produce physical goods as effortlessly as sharing online content, and we are developing the infrastructure to realize this vision for both consumers and businesses.With a substantial investment of $42M from an exceptional group of investors, including notable figures like Reid Hoffman and Ashton Kutcher, Arcade is set to revolutionize the industry. Our founders and investors are backed by a talented team from leading companies such as Google, Apple, and NVIDIA, driven by the mission to innovate at the intersection of AI, personal expression, and on-demand manufacturing.Role SummaryAs a Product Engineer specializing in AI, you will be a crucial player in shaping the future of design and commerce. Reporting directly to our Co-Founder & CEO, Mariam Naficy, you'll collaborate with engineers, designers, and AI researchers to deliver groundbreaking experiences. You will take ownership of key products from inception through execution, determining development directions and implementing them effectively.The ideal candidate is an innovative engineer capable of designing agent behaviors, writing production-quality code, prototyping workflows, crafting system prompts, debugging issues, and iterating based on user feedback. This role requires a proactive mindset and the ability to manage cross-functional initiatives in a dynamic startup environment.

About UsXOXO is an innovative research lab dedicated to crafting intelligent interfaces that enhance everyday life. Our stealth team, composed of passionate engineers, designers, and researchers, is focused on solving unique challenges that go beyond the workplace.With recent advancements in infrastructure, architecture, and model layers, we are actively seeking skilled builders to create the application layer that will actualize our visionary concepts.About the RoleWe are on the lookout for a proficient iOS engineer to lead the development of XOXO’s consumer app, featuring a pioneering interface for intelligence. This position calls for a robust engineer capable of managing the entire mobile surface area, from architecture and performance to refining a visually appealing design system that ensures intentional user interactions.A specific background is not mandatory; what truly matters is your passion for ownership: you take charge, work swiftly without compromising quality, and aspire to create a mobile product that redefines craftsmanship and performance standards.What You’ll DoDesign and launch the initial versions of our React Native app, transitioning it from concept to production.Convert a visually rich design system into reusable components, motions, and interaction patterns with seamless performance.Develop new product interfaces that seamlessly integrate modern AI/ML capabilities in a mobile-friendly manner.Enhance app performance, focusing on rendering, startup, memory consumption, battery usage, and perceived speed.Establish high standards for mobile engineering quality (including testing, monitoring, and release management) while collaborating with various teams to ensure successful delivery.

Join Lemurian Labs on our ambitious mission to harness the potential of artificial intelligence while minimizing our ecological impact. Our commitment to responsible innovation drives us to create sustainable AI solutions that benefit society and the environment alike. After all, innovation should empower the world, not compromise it.We are developing a cutting-edge, high-performance compiler that enables developers to 'build once, deploy anywhere.' This means seamless cross-platform compatibility, allowing you to train your models in the cloud and deploy them at the edge—all while ensuring optimal resource efficiency and scalability.If you are passionate about scaling AI sustainably and making AI development both powerful and accessible, we invite you to be a part of our team at Lemurian Labs. Collaborate with us as we build the future responsibly and innovatively.