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

fractional-ai is looking for a Senior or Staff Software Engineer to join the San Francisco office. This position centers on building advanced AI solutions with a team that values both technical depth and collaboration. Role overview This role focuses on designing and developing AI-driven systems. The work involves solving technical challenges and contributing to projects that push the boundaries of what AI can achieve. Collaboration with other engineers and stakeholders is a key part of daily responsibilities. Who will thrive Experienced engineers with a strong background in software development Those who enjoy working on complex technical problems Individuals who value teamwork and open communication Location This position is based in the San Francisco office.

fractional-ai is hiring a Software Engineer to join the team onsite in San Francisco. This role centers on building and improving technology that advances artificial intelligence. Role overview As a Software Engineer, you will work closely with others to develop and support projects that drive the company’s AI initiatives forward. The work involves collaborating with colleagues and contributing technical solutions in a team setting. What you will do Develop software for AI-driven projects Collaborate with team members in the San Francisco office Contribute ideas and technical expertise to ongoing initiatives Requirements Interest in technology and artificial intelligence Ability to work onsite in San Francisco Strong motivation to learn and contribute to team projects

Join Fractional AI as a Forward Deployed Product ManagerAt Fractional AI, we specialize in developing personalized Generative AI software that revolutionizes business operations. Collaborating with notable clients like Zapier, Airbyte, and Change.org, we create impactful AI applications tailored to meet their unique needs.As organizations strive to bridge the divide between theoretical AI and its practical applications, we facilitate this transition with our exceptional engineering capabilities and comprehensive AI solutions. Explore our case studies to see how we make a difference.We are a profitable, rapidly growing company dedicated to tackling the most challenging problems in applied AI.About the RoleAs a Forward Deployed Product Manager, you will engage with clients who present ambitious goals—such as enhancing content moderation efficiency, improving customer service, unlocking new integrations, and automating complex workflows. Your mission will be to transform these objectives into tangible AI-driven solutions that deliver real-world results, guiding the process from initial discussions to deployment and measurable business impact.This role encompasses several key functions:Client Engagement: Acting as the primary liaison between Fractional AI and our clients.Product Strategy: Defining product development priorities and rationales.Project Management: Overseeing the execution of projects from start to finish.Operational Flexibility: Taking initiative to address any gaps that arise during the product lifecycle.Your Responsibilities:Manage Customer Relationships:Serve as the strategic partner for clients, maintaining regular communication.Participate in initial discussions, facilitate discovery sessions, gather feedback, and ensure alignment on project objectives.Establish trustworthy connections with stakeholders at all levels, setting realistic expectations and transparently discussing trade-offs.Define Product Vision:Determine product features, refine project scope, and prioritize the most impactful use cases.Translate complex business challenges into clear, actionable project plans.

About Fractional AIAt Fractional AI, we specialize in creating tailored generative AI software that revolutionizes businesses.In today’s landscape, C-suite executives across the nation are striving to bridge the divide between theoretical AI and practical application. We facilitate this transition with our outstanding engineering talent and bespoke end-to-end AI solutions. Explore some of our case studies to discover more about our impact.Joining Fractional AI means becoming part of a dynamic team located in San Francisco and NYC, working on innovative generative AI projects for leading companies, all within the atmosphere of an engineering-centric startup.About Bringing Your Own Engineering TeamWe understand that the right team can significantly amplify our capabilities, fostering collaboration and driving collective achievement. If you are part of an existing group of 2-5 engineers—perhaps you co-founded your own venture or have been affected by layoffs—we invite you to apply to join Fractional AI as a team.We will coordinate your interviews for the same day, and should we extend an offer, it will be to all team members simultaneously. Each of you will have the freedom to accept or decline individually, but we hope you will all join us, after which we will collaborate to identify initial projects at Fractional AI where you can work together.As a member of Fractional AI, you will take a pivotal role in developing and launching AI applications for our first clients—from comprehending customer requirements to deploying solutions in their environments—all while contributing to the evolution of our Engineering team and the broader culture at Fractional AI as we grow to over 100 engineers.

Join Fractional AIAt Fractional AI, we specialize in creating tailored generative AI software that revolutionizes businesses. Our mission is to bridge the divide between theoretical AI and its practical applications, leveraging our exceptional engineering talent to deliver custom end-to-end AI solutions. To explore our success stories, please check out our case studies.By becoming a part of Fractional AI, you will join an innovative, in-person team located in San Francisco and NYC, where the dynamic atmosphere of a startup meets the potential to make a significant impact on millions of users. We are a diverse and curious group of achievers seeking talented individuals who are driven, collaborative, and results-oriented.Your RoleWe understand that conventional job descriptions may not fully capture your potential. At Fractional AI, we are always on the lookout for remarkable talent. We invite you to share your unique vision on how you can contribute to our team.Why You Should Consider Joining UsWe value transparency and recognize that choosing a company is a significant decision. Fractional AI may not be the right fit for everyone, and we strive to communicate who we are clearly.Reasons to Join Fractional AI:Experience AI in Action: Gain firsthand insights into how leading companies deploy AI solutions.Tackle Real Challenges: Collaborate on solving complex problems that many organizations face, ensuring a stimulating work environment with continuous learning opportunities across various industries.Learn from Industry Leaders: Work closely with a team comprised of successful founders, including Travis May, former CEO of LiveRamp and founder of Datavant, in an environment that fosters collaboration and creativity.Reasons Not to Join Fractional AI:Need for Predictability: If working across diverse projects and industries isn't your preference, this role may not suit you.Preference for Routine: Expect a non-repetitive experience, as you will engage with different clients and challenges regularly.

Join Saris AI as a Staff Backend Software Engineer, where you will play a pivotal role in developing innovative solutions that harness the power of artificial intelligence. In this dynamic position, you will collaborate with cross-functional teams, design scalable systems, and contribute to the overall architecture of our backend solutions.

Responsibilities:Develop Our Product. Take ownership of software features that enhance our AI platform, empowering private market investors to analyze deals swiftly and accurately. This role requires you to actively engage in coding and delivering essential platform components from the ground up.Ensure Quality and Excellence. Establish and maintain coding standards, architectural guidelines, and review procedures; mentor fellow engineers. Co-cultivate a culture centered on practical, reliable, and test-driven development that swiftly meets business requirements.Scale for Growth. Assist in monitoring and scaling the architecture of our platform and its infrastructure.Collaborate Across Functions. Engage closely with product, security, and go-to-market teams to translate our strategic roadmap into actionable features and deliverables.

About the RoleJoin Saris-AI, an innovative applied AI startup based in San Francisco and Montreal, where we are revolutionizing the banking industry. Our mission is to address a $100 billion annual challenge, growing rapidly each quarter, as we explore the potential of advanced multi-turn AI systems.We focus on automation challenges that require extensive contextual reasoning, tool integration with existing systems, and adherence to compliance requirements—problems that lack straightforward solutions.Our successful deployment of real AI agents managing customer workflows has led to a burgeoning client base, and we are expanding quickly. We seek highly skilled technical professionals who aspire to make a significant impact from the outset.Core Engineering TeamWe are in search of a passionate Software Developer who excels in dynamic and ambiguous settings. You should have experience guiding products from the initial version to large-scale implementation, and a penchant for crafting sustainable, elegant systems.Your Key ResponsibilitiesConceive, develop, test, deploy, maintain, and enhance AI-driven software solutions tailored for the fintech sector.Manage project timelines effectively, prioritizing tasks to deliver exceptional features.Contribute to product and business strategies as a key player, influencing both technical frameworks and overarching goals.Encourage and uphold best practices, including code reviews and testing.Candidate ProfileProven experience in backend/fullstack engineering, particularly within SaaS projects with significant impact.Extensive knowledge of Python (Django, Flask, FastAPI), TypeScript (React), Docker, and cloud platforms (AWS/GCP).Solid track record in designing, constructing, and optimizing distributed systems.Strong foundation in both relational and non-relational databases (PostgreSQL, Redis).Expertise in API design (REST, GraphQL) and deployment practices.Preferred QualificationsExperience building intricate workflow orchestration systems.Familiarity with cloud infrastructure.Background in creating integrations or data pipelines.A passion for mentoring and developing team capabilities.

About Onos HealthAt Onos Health, we are on a mission to revolutionize healthcare by ensuring that every dollar spent is directed towards the highest quality of care. A staggering 30% of U.S. healthcare expenditure is squandered, primarily due to inefficient care and administrative inefficiencies stemming from the disconnect between providers and payers.We are tackling this problem head-on by constructing the largest AI-driven healthcare data platform. Our innovative models empower payers to make rapid and precise decisions regarding their patient populations. By directing members towards appropriate care, Onos is transforming healthcare funding, ensuring it drives quality outcomes while enhancing affordability.Having recently secured $6M in Seed funding from prestigious investors, Onos is currently collaborating with some of the largest health plans in the nation, successfully signing our first national plan shortly after our launch.Join us in defining a new category in healthcare and contribute to a brighter future for care delivery.

Join the Okta FamilyAt Okta, we are redefining identity management for the digital world. Our mission is to empower everyone to securely access any technology, anywhere, on any device or application. With our versatile Okta Platform and Auth0 Platform, we provide unparalleled security and automation, making identity the cornerstone of business security and expansion.We value diverse perspectives and experiences; we seek lifelong learners who can contribute to our mission with their unique backgrounds. Be a part of our journey to build an identity-centric future.The Global AI Engineering TeamBecome part of a unified global AI engineering team that spans across the US and India. Engage in pioneering applied AI projects while laying the foundational elements that facilitate secure, scalable AI at an enterprise level. If your passion lies in creating AI that is smarter, faster, and perpetually secure, this is your chance to make a significant impact.The Staff Software Engineer OpportunityWe are looking for a Staff Software Engineer to join our global AI Engineering team, focused on building the future of secure, enterprise-grade AI Agents. You will be instrumental in designing and developing user-friendly experiences and comprehensive AI solutions that drive them. In this position, you will help shape the platforms and services that support Okta’s internal transformation, contributing to the infrastructure and applications that bring intelligent automation and GenAI to fruition.

Join the Revolution at Retell AIRetell AI is pioneering the future of call centers through innovative voice AI, driven by first principles thinking.In just 18 months since our inception, we have empowered thousands of businesses with our AI voice agents, transforming how sales, support, and logistics calls are managed—previously requiring extensive human teams. Supported by prestigious investors such as Y Combinator and Alt Capital, we've rapidly scaled from $5M ARR to an impressive $36M ARR with a compact yet dynamic team of 20.Our ambition for 2026 is to create a revolutionary customer experience platform, where entire contact centers are powered by AI. Moving beyond basic automation, we aim to develop intelligent AI “workers” that serve as frontline agents, QA analysts, and managers, continuously enhancing customer interactions without the need for constant human oversight.As we expand, we are seeking passionate engineers who are eager to solve challenging technical problems, act swiftly, and make a significant impact in one of the fastest-growing voice AI startups. Let’s shape the future together.

Ironclad stands at the forefront of the AI contracting revolution, seamlessly converting agreements into valuable assets. Our platform accelerates contract workflows, delivers instant insights, and empowers teams to drive their work forward—all while keeping you in control. Whether you're engaged in buying or selling, Ironclad streamlines the entire process on a singular, intelligent platform, giving leaders the visibility they need to stay ahead. Esteemed organizations such as OpenAI, the World Health Organization, and the Associated Press rely on Ironclad to expedite their operations.Our commitment to excellence has not gone unnoticed; we are regularly lauded as an industry leader, recognized as a Leader in the Forrester Wave and the Gartner Magic Quadrant for Contract Lifecycle Management. Additionally, we have been honored as a Fortune Great Place to Work and listed among Fast Company’s Most Innovative Workplaces. Ironclad has also earned a spot on Forbes’ AI 50 and Business Insider’s list of Companies to Bet Your Career On. We are supported by top-tier investors including Accel, Y Combinator, Sequoia, BOND, and Franklin Templeton. For further details, visit www.ironcladapp.com or connect with us on LinkedIn.This position is hybrid, requiring in-office attendance at least twice a week on Tuesdays and Thursdays for collaboration and engagement, with potential additional days for team or company events.Engineering at IroncladIn the capacity of Staff Software Engineer, you will collaborate with cross-functional teams in engineering, product, design, and go-to-market efforts to identify impactful challenges and craft, develop, and deploy innovative solutions. You will be instrumental in shaping a platform that enables legal teams and business partners to excel at scale. As we usher a time-honored profession into the digital era, your contributions will define the future of contracting.We invite seasoned engineers from diverse backgrounds who possess robust coding skills and a proven history of delivering thoughtful, reliable products. Join our collaborative, ego-free team that values mutual learning, diverse perspectives, and an inclusive, supportive work environment. If our mission resonates with you and you are eager to help create a product that legal and business teams cherish, we would love to connect!

Join Our Innovative Team at Retell AIRetell AI is at the forefront of revolutionizing the call center industry through advanced voice AI technology. In just 18 months since our inception, we have empowered thousands of businesses to optimize their sales, support, and logistics calls, which previously relied on large teams of human agents. Supported by prominent investors including Y Combinator and Alt Capital, we've achieved remarkable growth, scaling from $5 million to $36 million in annual recurring revenue (ARR) while expanding our talented team to 20 members.Our ambitious vision for 2026 is to develop a state-of-the-art customer experience platform, transforming entire contact centers with AI. Unlike traditional automation that requires ongoing human oversight, we are building intelligent AI "workers" capable of functioning as frontline agents, quality assurance analysts, and managers, constantly enhancing customer interactions.If you are a passionate innovator eager to solve complex technical challenges and make a tangible impact at one of the fastest-growing voice AI startups, we invite you to join us in shaping the future.Ranked among the top 50 AI applications by a16z: a16z List4th on Brex's Fast-Growing Software Vendors of 2025: Brex BenchmarkFeatured as a leading startup on: Leanaileaderboard

Become a Part of ClericAt Cleric, we are envisioning a future where engineers can dedicate their talents to creating groundbreaking products, liberated from the burdens of operational tasks. Our current focus is an AI-driven Site Reliability Engineering (SRE) agent that autonomously resolves issues within production environments. This innovative solution employs a large language model (LLM) reasoning engine to understand, interpret, and implement solutions to production problems, even when faced with new challenges.Now is an incredible moment to join our team. We are a compact group of seasoned professionals in AI, software development, and infrastructure, supported by a prominent AI venture capital firm and Silicon Valley investors. Our product is actively utilized by leading technology companies in sectors such as fintech, ride-hailing, and autonomous vehicles.About the RoleWe are on the lookout for a Staff Software Engineer specializing in AI. In this role, you will spearhead the development of our SRE agent, focusing on its reasoning capabilities, learning processes, and integration. You will also work on the foundational runtime and technical architecture of our comprehensive product. Your contributions will be crucial in maintaining high engineering standards, crafting exceptional customer experiences, and advancing the agent's ability to tackle increasingly complex SRE challenges in a dynamic, non-deterministic environment where success is evaluated through outcomes rather than code inspection.What You'll Do:Design and implement frameworks for evaluating agent performance and reliabilityAnalyze agent behavior beyond mere code: trace reasoning, tool selections, and contextual factors to comprehend decision-making processes.Develop autonomous agents capable of executing intricate, multi-step tasksCreate self-improving systems that adapt based on feedback and outcomesEnhance agent observability to address routine issues related to tool usage and agent orchestrationYou Bring:Extensive experience in building and managing production systems, with a solid understanding of machine learning fundamentals, including recall, precision, and F1 scores, along with the knowledge that accuracy alone can be misleading.Experience in building at least one agent from the ground up.Regular use of coding agents and AI assistants for practical tasks, with insights into their strengths and weaknesses.Strong foundational skills in software engineering, with informed perspectives on developing reliable, scalable, and secure software.Experience operating high-scale distributed infrastructures, with an emphasis on performance and efficiency.

About EliseAIAt EliseAI, we are dedicated to transforming crucial sectors such as housing and healthcare. Securing a place to live and accessing quality healthcare should not be so challenging. By embedding AI agents into existing workflows, we enhance efficiency, reduce expenses, and elevate the overall experience for all stakeholders.Housing: We streamline the process for renters to tour apartments, sign leases, submit maintenance requests, and engage with property teams, consolidating everything they need for their home into a single platform.Healthcare: We simplify appointment scheduling, intake form completion, and patient-provider communication, allowing everyone to prioritize health over paperwork.With EliseAI, organizations can minimize manual tasks, enhance accessibility, and provide an integrated experience across vital services. We recently secured a $250 million Series E funding round led by Andreessen Horowitz to further our mission.About The RoleIn the position of Staff Software Engineer at EliseAI, you will not merely write code; you will develop software that enhances business operations and positively impacts lives. Rather than adhering to an existing blueprint, you will be responsible for crafting one. Each day will present opportunities to identify scalable solutions and execute them. You will collaborate with a small team of elite engineers, taking on substantial ownership, leading projects, and bringing your innovative ideas to fruition—essentially functioning as a small startup within a dynamic environment.Key ResponsibilitiesDevelop systems that facilitate intelligent communication and operation for autonomous buildings.Engage directly with customers to design and manage new product features from initial concept through to deployment.Enhance the scalability and reliability of our fundamental infrastructure.Suggest and implement substantial improvements to our architectural frameworks and design methodologies.Collaborate with product and design teams to transform AI capabilities into compelling user experiences.Continuously deploy new features and enhancements in a fast-paced, iterative environment.

Role Overview Crusoe is seeking a Senior Staff Software Engineer focused on CAPE for its San Francisco office. This role centers on designing and building software solutions that support Crusoe's mission to advance technology in the energy sector. What You Will Do Design and implement software systems for CAPE projects Collaborate with cross-functional teams to deliver solutions that align with user needs and company goals Tackle complex technical challenges in support of Crusoe's energy initiatives What We Look For Strong technical background in software engineering Experience solving complex problems and delivering reliable software Ability to work effectively with colleagues across multiple disciplines Location San Francisco, CA - US

About UnifyUnify is revolutionizing the way revenue teams operate by developing the first AI-powered system of action. Our mission is to transform outbound strategies into a robust growth engine, ensuring that go-to-market execution is observable, repeatable, and scalable. Established in 2023 by industry leaders from Ramp and Scale AI, our talented team boasts backgrounds from renowned companies like Airbnb, Meta, Waymo, and Perplexity.In 2024, Unify achieved an impressive 8x revenue growth and serves a diverse clientele including Perplexity, Cursor, SoFi, and Justworks. We are a dynamic team fueled by high energy and intensity, having secured $58M in funding from leading investors such as Thrive, Emergence, and OpenAI. Join us in shaping the future of GTM!About the Role:As a Senior Software Engineer specializing in AI at Unify, you will be at the forefront of innovation, developing new AI products and enhancing our AI platform. Your work will encompass agents, retrieval systems, classification, fine-tuning, reinforcement learning, and LLM inference infrastructure. If you are passionate about creating production-ready AI systems and wish to contribute to cutting-edge applications used by premier GTM teams, this role is for you.

About LindyAt Lindy, we're on a mission to create an AI assistant designed for everyone — not just the tech-savvy or the builders, but for those who simply want to reclaim their time. The Lindy Assistant seamlessly integrates into iMessage, managing emails, calendars, and meetings with just a two-minute setup. We are crafting the essential bridge between powerful AI technology and the everyday lives of real people.The RoleAs a Staff Software Engineer, you will take charge of high-impact projects from inception to production in a dynamic environment where engineers prioritize creating exceptional products. Collaborating within a small, highly autonomous team, you'll be shipping updates multiple times a day. This position is perfect for someone driven by intrinsic motivation to build, who prioritizes speed without compromising quality, and who measures success by the impact of their work in production.

Join Us in Combating the Escalating Wildfire Crisis with Cutting-Edge AI and IoT SolutionsAbout UsThe Challenge: In the face of climate change, wildfires are becoming more frequent and severe. Traditional methods of fire detection, reliant on bystanders and emergency calls, lead to critical delays in response times. Fire authorities require innovative solutions for faster detection, verification, and response to avert catastrophic fire outbreaks.Who We Are: Pano AI is a dynamic growth-stage startup based in San Francisco, comprising over 150 passionate professionals. We stand at the forefront of wildfire detection and intelligence, equipping fire services with timely information and advanced technology to enhance their response capabilities. Our platform integrates cutting-edge hardware, software, and AI, utilizing ultra-high-definition 360-degree cameras positioned strategically to provide real-time threat assessments. Our technology empowers fire professionals with actionable insights, enabling them to prevent minor flare-ups from escalating into significant disasters.Recognized by TIME as one of the 100 Most Influential Companies of 2025, and featured in MIT Technology Review's top 15 climate tech companies to watch, Pano AI is paving the way for innovative solutions in fire response. Our contributions have been recognized in major publications such as the Wall Street Journal and Bloomberg.

Senior Staff Software EngineerLocation: San Francisco (Hybrid - In-person 2-3 days per week)Compensation: $160,000 – $200,000 + Meaningful EquityAbout HomeVisionAt HomeVision, we’re pioneering the future of AI-driven software for the expansive $13 trillion mortgage sector. Our cutting-edge platform, MIRA (Machine Intelligence Review Assistant), revolutionizes the way document processing and underwriting are approached, enabling lenders to expedite loan closings with significantly reduced friction. By automating these labor-intensive processes, we not only save time and money but also alleviate stress for borrowers. We've already made a substantial impact by transforming appraisal operations for the nation’s leading lenders, achieving a remarkable 75% reduction in review times. Our mission continues as we work diligently to expand MIRA's capabilities across the entire loan file, automating income, asset, and credit assessments to deliver a comprehensive underwriting solution for the industry.We thrive on collaboration with intelligent, ambitious, and compassionate individuals who are eager to tackle complex challenges and embrace true responsibility. Our engineers are empowered to take ownership of significant projects from inception to deployment, working alongside our product, design, and marketing teams. We uphold values of humility, accountability, transparent communication, and mutual respect, striving to foster a supportive and loving work environment for our team, customers, and partners.About the RoleWe are in search of a proficient full-stack Staff Software Engineer to enhance our core product team in San Francisco. In this role, you will collaborate closely with our founders, designers, and machine learning engineers to construct the interfaces and infrastructure that drive MIRA. This is not a role focused on maintaining legacy systems; instead, you will be at the forefront of architecting innovative features that translate complex AI decisions into user-friendly actions.What You Will DoShip Product End-to-End: You will manage features from database schema to UI components, crafting intuitive interfaces for underwriters to engage with our AI, making complex data accessible and actionable.Architect for Scale: Design and implement robust solutions that manage intricate loan file data, ensuring high availability and low latency as we scale to accommodate millions of documents.Bridge the AI Gap: Collaborate closely with our ML team to seamlessly integrate AI services into our SaaS platform, ensuring smooth transitions between our decision-making models and user applications.Elevate Engineering Culture: Promote continuous improvement by advocating effective development practices and the integration of new AI-powered tools to enhance our operational velocity and the stability of our production environments.