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Principal Software Engineer B2b Engineering jobs in San Francisco· Page 3

Results 41–60 of 5,852 for “Principal Software Engineer B2b Engineering” in San Francisco.

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OpenAI logo
Full-time|On-site|San Francisco

About Our TeamAt OpenAI, we are pioneers in the field of artificial intelligence, committed to driving innovation and shaping a future where AI benefits everyone. We seek passionate and visionary Research Engineers to become part of our Applied Voice Team. In this role, you'll engage in transformative research on speech models, translating these insights int…

Feb 17, 2026
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Cloudflare, Inc. logo
Full-time|Hybrid|Hybrid

Join Cloudflare as a Principal Systems Engineer specializing in Internet Protocol Communication (IPC). In this pivotal role, you will lead and innovate within our engineering team, playing a crucial part in enhancing our systems to support seamless communication over the internet. Your expertise will help shape our infrastructure and drive our mission to help build a better internet.

Feb 6, 2026
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Unstructured logo
Full-time|Remote|Remote

At Unstructured, we are setting the benchmark for enterprise data transformation in an era defined by large language models (LLMs) and generative AI. Within just two years, we've successfully secured over $65 million in funding from esteemed investors such as Menlo Ventures, Bain Capital, Databricks, NVIDIA, Microsoft, and IBM.Our open-source toolkit has achieved over 52 million downloads and is utilized by more than 66,000 companies, including nearly half of the Fortune 500. We empower AI workflows across commercial and federal sectors by transforming unstructured data—such as PDFs, HTML, Word documents, images, and emails—into scalable, AI-ready data pipelines.We’re not just creating tools; we’re constructing the fundamental infrastructure of generative AI that enables intelligence across various industries.Unstructured is seeking Staff and Principal Software Engineers to establish the architectural foundation for processing and transforming unstructured data for LLM applications.This high-impact, hands-on position is ideal for individuals who excel in complex systems work—those who could author a guide on Kubernetes, are passionate about Python, and have a deep understanding of Postgres at the index and transaction-log levels. You will lead the technical direction for our core platform, overseeing the flow of data from ingestion to transformation and retrieval.You will collaborate closely with the Head of Engineering, Head of Infrastructure, and product leaders to ensure Unstructured’s systems are efficient, resilient, and capable of supporting next-generation AI workloads.

Apr 1, 2026
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Unstructured Technologies logo
Full-time|Remote|Remote

At Unstructured Technologies, we are pioneering the future of enterprise data transformation in the era of large language models (LLMs) and generative AI. With over $65 million raised from top-tier investors such as Menlo Ventures, Bain Capital, Databricks, NVIDIA, Microsoft, and IBM within just two years, we are positioned for rapid growth. Our open-source toolkit, downloaded over 52 million times, is utilized by more than 66,000 companies, including nearly half of the Fortune 500. We enable AI workflows across both commercial and federal sectors, converting PDFs, HTML, Word documents, images, emails, and more into scalable AI-ready data pipelines. We are not merely creating tools; we are establishing the critical infrastructure that supports generative AI and drives intelligence across diverse industries. We are seeking Staff and Principal Software Engineers to help shape the architectural framework that allows enterprises to efficiently process and transform unstructured data for LLM applications. This role is perfect for individuals who excel in deep systems work—those who could author a definitive guide on Kubernetes, are fluent in Python, and possess an in-depth understanding of Postgres at the index and transaction-log level. You will take charge of the technical direction for our core platform, overseeing data movement through all stages—from ingestion and transformation to retrieval. You will collaborate closely with the Head of Engineering, Head of Infrastructure, and product leaders to ensure that Unstructured’s systems are high-performing, resilient, and equipped to handle the next generation of AI-driven workloads.

Oct 31, 2025
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Databricks logo
Full-time|$220.4K/yr - $297.4K/yr|On-site|San Francisco, California

P-1125SummaryAt Databricks, we are dedicated to empowering data teams to tackle some of the world's most pressing challenges, from detecting security threats to advancing cancer drug research. We achieve this by developing and maintaining a world-class data and AI infrastructure platform, allowing our clients to concentrate on the high-impact issues that are vital to their missions.Our engineering teams create sophisticated products that address real and significant needs. We continuously strive to push the frontiers of data and AI technology while ensuring resilience, security, and scalability that are essential for our customers' success on our platform.Our clients entrust Databricks with their most sensitive data, and the Trust & Safety team is committed to developing the most reliable data analytics and machine learning platform globally. Security Engineering plays a key role in Trust & Safety by safeguarding customer data from malicious threats. We are seeking senior leaders like you to shape the vision and strategy in this crucial area.

Jan 30, 2026
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Saviynt logo
Full-time|On-site|San Francisco

Join Saviynt, a pioneering leader in identity security, where our cutting-edge AI-driven platform effectively manages and governs access to vital applications, data, and business processes for organizations across the globe. Our clients, including Fortune 500 companies and government institutions, rely on us to protect their digital assets, enhance operational efficiency, and minimize compliance costs. With our solutions, organizations can confidently and safely embrace AI technologies.As a Principal Software Development Engineer in Test, you will thrive in a fast-paced and results-oriented environment. We seek an innovative Quality Engineering leader who establishes high-performance standards, swiftly evaluates scenarios, provides strategic insights to executive leadership, and drives significant enhancements to support our business objectives. The right candidate will be a proactive individual with a strong background in leading technical teams and a profound knowledge of the latest tools and technologies essential for maintaining world-class quality engineering and testing frameworks. Exceptional communication and leadership skills, along with the ability to work collaboratively across various departments, are crucial for success in this role.

May 4, 2026
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City and County of San Francisco logo
Principal Engineer - Citywide Operations

City and County of San Francisco

Full-time|On-site|San Francisco

Role overview The Principal Engineer for Citywide Operations at the City and County of San Francisco takes on a central role in shaping infrastructure projects that affect residents throughout the city. This position focuses on delivering engineering solutions that reinforce public services and strengthen city systems. Key responsibilities Lead the planning and execution of major citywide infrastructure projects Collaborate with city departments, stakeholders, and community groups Guide engineering teams to deliver reliable, high-quality solutions Support initiatives to improve public services and city operations Collaboration Regular coordination with multiple city departments and community members ensures that projects align with the needs of San Francisco residents. The Principal Engineer builds strong working relationships across the city to deliver effective results.

Apr 20, 2026
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Cloudflare, Inc. logo
Full-time|Hybrid|Hybrid

Join Cloudflare as a Principal Systems Engineer and play a pivotal role in shaping the future of our cutting-edge technology solutions. In this hybrid position, you will leverage your extensive expertise to design and implement innovative systems that enhance our service offerings.

Feb 6, 2026
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Ironclad logo
Full-time|$285K/yr - $315K/yr|Hybrid|San Francisco

Ironclad is the foremost AI-driven contracting platform that revolutionizes agreements into valuable assets. Contracts are expedited, insights are instantly accessible, and agents facilitate progress, all while maintaining your control. Whether involved in purchasing or selling, Ironclad streamlines the complete process onto a singular intelligent platform, providing leaders with the insights necessary to remain ahead in their sectors. This is why transformative organizations such as Rivian, the World Health Organization, and the Associated Press trust Ironclad to enhance their operations.We have consistently been acknowledged as an industry leader: recognized in the Forrester Wave and the Gartner Magic Quadrant for Contract Lifecycle Management, labeled as a Fortune Great Place to Work, and featured in Fast Company’s Most Innovative Workplaces. Ironclad has also made it to Forbes’ AI 50 and Business Insider’s list of Companies to Bet Your Career On. We are supported by prominent investors including Accel, Y Combinator, Sequoia, BOND, and Franklin Templeton. For additional information, visit www.ironcladapp.com or connect with us on LinkedIn.This position is hybrid. In-office attendance is required at least twice weekly on Tuesdays and Thursdays for collaboration and interaction, with potential additional office days for team or company events.Engineering @ IroncladAs a Principal Engineer at Ironclad, you will collaborate across departments to pinpoint business challenges and design, construct, and validate solutions. You will architect and enhance a platform that empowers legal professionals to scale their efforts and businesses 100x more efficiently, with AI at the heart of our operations. At Ironclad, we have created a product that modernizes a two-thousand-year-old profession, and you will be integral to propelling our foundational work forward by developing the next generation of AI-powered contract intelligence features and the platform capabilities that underpin them.We are in search of a seasoned principal engineer with robust coding skills, extensive platform architecture experience, and a proven record of delivering high-quality AI-enabled products. Our work environment is highly collaborative, fostering a positive and inclusive culture, while also providing flexibility for remote work. If you are excited to contribute to our mission of developing a product that legal teams truly value, we would love to hear from you!Key Responsibilities:Collaborate across functions with product managers, designers, and fellow engineers to specify, design, architect, and construct features and systems.Take ownership of and refine the core platform architecture (se...

May 1, 2026
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Condor Software logo
Full-time|On-site|San Francisco

Join Condor Software as a Full-Stack Platform EngineerAt Condor, we are revolutionizing the financial infrastructure that supports clinical development. With billions invested annually in discovering and developing new therapies, we strive to connect clinical operations and finance into a cohesive system. By integrating real-time financial intelligence, we empower R&D and finance leaders with the tools they need to make informed, high-stakes decisions.We are an AI-driven, pharma-native infrastructure provider, scaling industry standards in collaboration with top-tier partners. Our platform facilitates prediction, control, and execution in the most complex R&D environments worldwide.The Importance of Your RoleHaving established ourselves as a trusted partner for enterprise teams, we are now focused on the challenging task of scaling our platform to meet increasing demands. As a rapidly growing company, backed by prominent investors like Felicis and 645 Ventures, this is a unique opportunity to contribute to the foundational infrastructure that will redefine how therapies reach patients.Your ResponsibilitiesAs a Full-Stack Platform Engineer, you will be pivotal in building and scaling the core platform that supports the financial intelligence infrastructure relied upon by leading biopharma companies. This role encompasses critical engineering tasks at the intersection of backend systems, cloud infrastructure, and intelligent automation, with a strong emphasis on reliability and scalability.Your primary focus will be on backend architecture, where you'll design and implement services that drive complex financial and operational workflows. You'll be instrumental in shaping data flow, workflow orchestration, and enabling emerging AI-driven capabilities. This role goes beyond simple integration; you'll be crafting robust primitives that support other teams as our product and customer base expand.Working as a core member of a cross-functional product team, you will closely collaborate with product managers, designers, quality engineers, and data specialists to transition features from concept to production. While backend expertise is crucial, you will also engage across the stack to ensure the platform's capabilities are effectively leveraged.

Feb 3, 2026
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Condor Software logo
Full-time|On-site|San Francisco

About CondorAt Condor, we are committed to transforming the financial infrastructure of clinical operations and finance. Every year, substantial investments are made in discovering and developing new therapies, yet the tools and data supporting these efforts often remain fragmented and disconnected. Our mission is to bridge this gap.We are pioneering a real-time intelligence layer that seamlessly integrates clinical operations, vendor activities, and financial signals. As a result, R&D and finance leaders gain unprecedented control over their organizational operations, making informed decisions with confidence.Our platform is rooted in AI-driven technology tailored for the pharmaceutical industry, built to scale with the standards established in collaboration with leading partners in the field. We empower organizations to enhance their prediction, control, and execution capabilities in the most complex R&D environments globally.The Importance of Our WorkHaving established trust among enterprise teams to manage critical operations and finance, we are now faced with the challenge of scaling our solutions. This pivotal phase is where our efforts will shape the future of clinical development.Condor is experiencing rapid growth, supported by prominent institutional investors like Felicis and 645 Ventures, and is becoming integral to the operations of Top 200 biopharma companies. This role represents a unique opportunity to contribute to the foundational infrastructure that will redefine how therapies are brought to market.Role OverviewThe Vice President of Engineering at Condor is a vital leadership position responsible for establishing the engineering operating system behind a platform that our customers will increasingly view as essential. This role transcends mere maintenance; it is about innovating and enhancing how we deliver products with agility and precision.In this position, you will collaborate closely with the CEO and other cross-functional leaders to convert company priorities into actionable plans. You will take on hands-on responsibilities typical of early-stage leadership, from resolving production issues to making architectural decisions, while also building a scalable team and processes.This is an opportunity for an engineering leader seeking genuine ownership and influence, with the chance to create a resilient engineering function during a critical juncture in our growth.Key ResponsibilitiesDevelop and Direct the Engineering Operating System: Design and implement frameworks and processes that ensure reliability and efficiency.Team Leadership: Recruit, mentor, and develop a high-performing engineering team.Cross-Functional Collaboration: Work with product management and other departments to align engineering efforts with company goals.Strategic Technical Decisions: Make informed architectural choices that support product scalability and performance.

Feb 3, 2026
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Lila Sciences logo
Full-time|On-site|Cambridge, MA USA; London, UK; San Francisco, CA USA

Join Lila Sciences as a Staff or Principal Engineer specializing in Technical Mitigations Research. This role offers an exciting opportunity to leverage your engineering expertise to develop innovative solutions in the field of technical mitigations.

Apr 7, 2026
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SoFi logo
Full-time|Remote|WA - Seattle; CA - San Francisco

Join SoFi as a Principal Engineer specializing in Digital Identity, where you will leverage cutting-edge technologies to enhance our digital platforms and secure user identity. This role offers the opportunity to drive innovative solutions that impact millions of customers. You'll collaborate with cross-functional teams to design, develop, and implement robust identity verification systems that ensure the highest standards of security and user experience.

Mar 26, 2026
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Abby Care logo
Full-time|On-site|San Francisco

About Abby CareAt Abby Care, we are on a mission to revolutionize family caregiving, addressing one of society's most pressing challenges. With over 50 million Americans acting as unpaid family caregivers, our goal is to empower these individuals by offering training and employment opportunities so they can be compensated for the essential care they provide.We are developing an innovative, tech-driven family-first care platform designed to enhance care delivery, improve health outcomes, and ensure a top-tier experience nationwide. With collaborations with leading insurance providers, healthcare entities, and community organizations, and support from visionary VCs, we are expanding rapidly to serve families across the country.The RoleJoin our dynamic team at Abby Care, where technology meets healthcare delivery. We are building AI-powered solutions that transform how caregivers deliver care and how our teams provide backend support. Our talented group of professionals across Engineering, Product, Design, and Data is dedicated to managing our product lifecycle from conception to execution and refinement.We are seeking a Principal Engineer to spearhead the technical vision for Abby Care's platform. Reporting directly to the VP, Head of Engineering, this full-time position is based in San Francisco, CA (4 days in-person). This role is pivotal in defining the architecture and strategic roadmap to tackle high-impact challenges, ensuring our platform scales effectively while integrating AI into real-world applications.As a builder-leader, you will set the technical direction, mentor your team, and dive into critical technical issues as necessary. If you are excited about making a significant impact within an organization that has achieved product/market fit and fosters innovation in AI, we would love to hear from you!

May 1, 2026
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brm.ai logo
Full-time|On-site|San Francisco Office

Empower the Buyers with TechnologyAt BRM, we're on a mission to equip individuals with innovative tools that enhance their productivity. Our digital assistants seamlessly empower organizations to discover and manage essential tools with ease. Whether it's facilitating renewals, retrieving lost contracts, intelligently negotiating, or automating compliance reviews, our solutions are designed to restore power to the buyer!Your Role in Our VisionAs we stand at a transformative crossroads filled with potential, we seek an experienced senior software engineer to elevate our development efforts and accelerate project timelines with precision and impact. You will take full ownership of projects, ensuring they deliver real business value promptly and efficiently.Your responsibilities will include redefining the inbox experience, streamlining legal and finance workflow requests, and empowering our AI-driven assistants. We are looking for someone who is action-oriented and dedicated to converting innovative ideas into tangible results. Your technical expertise will play a pivotal role in advancing intelligent automation and expanding the possibilities within AI-driven solutions.Key ResponsibilitiesDevelop, design, and maintain high-quality software solutions using technologies like TypeScript, NodeJS, PostgreSQL, Redis, and LLMs (GPT, Claude, etc.), alongside Docker and other modern tools.Engage in close collaboration with cross-functional teams to convert product requirements into scalable and efficient code.Participate in code reviews, contribute to architectural discussions, and engage in technical planning sessions to uphold code quality and scalability.Own critical components and features, overseeing them from design to deployment, with a strong emphasis on performance, reliability, and security.Contribute to the enhancement of our technical architecture and infrastructure, utilizing cloud services like GCP to maximize performance and scalability.Who You AreExperience: Over 8 years of engineering experience within a high-performing B2B SaaS environment.Action-Oriented: You prioritize delivering functional code over theoretical concepts.Hands-On Developer: You thrive in hands-on coding, with proficiency in TypeScript, NodeJS, and familiarity with at least one cloud service provider, alongside a solid understanding of cloud-native architectures.

Jul 5, 2024
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Tendo logo
Full-time|On-site|San Francisco, CA

Join Tendo as a Principal Software Engineer and lead the charge in developing transformative healthcare software that enhances the experiences of patients, clinicians, and caregivers alike. This is a unique opportunity to guide a dedicated team through the initial phases of product development, while also contributing your coding expertise and expanding your skill set.The ideal candidate will possess comprehensive full-stack experience in crafting SaaS and/or Cloud Native solutions in a regulated environment. As a Principal Software Engineer, you will leverage your deep technical knowledge in technologies such as React, TypeScript, Go, Ent, gRPC, Twirp, and AWS services like EventBridge and Aurora. A strong emphasis on knowledge sharing and mentoring within a growing team will be essential.We seek someone who thrives in an Agile, collaborative setting, working closely with product managers, designers, external partners, and fellow engineers to create a high-quality, consumer-focused product from the ground up.

Mar 9, 2024
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Crusoe logo
Full-time|$170K/yr - $200K/yr|On-site|San Francisco, CA - US

At Crusoe, our vision is to enhance the availability of energy and intelligence. We are at the forefront of developing solutions that empower individuals to innovate boldly with AI, all while ensuring that we uphold principles of scalability, speed, and sustainability.Join us in driving the AI revolution through sustainable technology at Crusoe. You will play a pivotal role in fostering innovation, making a significant impact, and collaborating with a team that is leading the way in responsible and transformative cloud infrastructure.About the RoleWe are on the lookout for a Senior Software Engineer to take on the role of founding engineer within our new Enterprise Software Engineering team in IT. You will work closely with the Director to develop internal tools, automation processes, and integrations that remove manual tasks and address critical operational challenges across the organization.This role transcends traditional enterprise IT positions. You will leverage AI-assisted development as your primary method, delivering production-quality software within days instead of months, while laying the groundwork for future team members. As you grow in this role, your primary contributions will focus on defining specifications, context, and reusable patterns to guide AI agents, while still engaging in hands-on coding for the most complex challenges.Your ResponsibilitiesDesigning and deploying internal tools, automation, and integrations that provide measurable benefits across Finance, Operations, HR, and other business functions.Utilizing AI-assisted development as your standard workflow, which includes drafting specifications, creating prompts, reviewing AI-generated code, and iterating quickly.Establishing foundational technical patterns such as coding standards, project conventions, reusable components, and context files that facilitate AI-driven development.Creating and managing integrations between enterprise systems through APIs, middleware, and data pipelines.Developing solutions across a versatile environment that combines cloud application platforms with internal GPU compute for AI workloads.Collaborating with business teams during rapid prototyping sessions, then refining prototypes into production-ready systems complete with testing, monitoring, and documentation.Setting up CI/CD pipelines, automated testing, and quality assurance measures for all solutions delivered.Taking ownership of solutions from end to end, covering everything from specification and implementation to deployment and production support.

Feb 12, 2026
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Unity Technologies logo
Full-time|$250K/yr - $340K/yr|On-site|San Francisco, CA, USA

The Opportunity Join the Ads Infrastructure team at Unity, where we design and manage the foundational distributed systems that drive one of the largest real-time advertising platforms globally. Our infrastructure is integral to every aspect of Unity Ads, enabling segmentation, optimization, bidding, traffic routing, experimentation, and analytics on a worldwide scale. We are committed to developing resilient, scalable, and cost-effective systems capable of handling immense traffic volumes across multiple regions while adhering to strict latency and availability standards. Utilizing advanced technologies including Kubernetes, Kafka, Flink, Starrocks, Valkey, and other cloud-native components, our platform supports engineers, data scientists, and product teams in advancing Unity Ads. This senior individual contributor role will have a significant technical impact across the organization. You will be responsible for making essential architectural decisions, guiding the long-term evolution of our platform, and collaborating with senior managers and directors to shape the technical vision of Ads Infrastructure while remaining actively involved in hands-on development.

Mar 19, 2026
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Quizlet Inc. logo
Full-time|On-site|San Francisco, CA

Join Quizlet as a Principal Software Engineer to revolutionize the way consumers interact with educational content. In this pivotal role, you will leverage your extensive software engineering experience to design and implement innovative solutions that enhance user experiences. Collaborate with a dynamic team of engineers and product managers to drive product vision and execution.

Mar 5, 2026
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SoFi logo
Full-time|On-site|CA - San Francisco; WA - Seattle

Employee Applicant Privacy NoticeWho We Are:Join us in shaping a brighter financial future.At SoFi, we are redefining personal finance by transforming the way individuals engage with their financial journeys. As a cutting-edge financial services provider and national bank, we leverage innovative, mobile-first technology to empower our millions of members to achieve their aspirations. In a rapidly evolving industry, we pride ourselves on making a meaningful impact on the lives of our members while adhering to our core values. Invest in your future with SoFi and be part of the financial revolution.The Role:We are seeking a seasoned Senior Principal Software Engineer to provide strategic AI leadership within SoFi’s technology division. In this pivotal position, you will significantly influence and guide the AI enablement strategy in collaboration with key engineering and data science leaders. Your focus will be on promoting best practices in AI applications across diverse domains, especially in software development and back-office operations. You will lead the vision for infrastructure and methodologies essential for supporting these initiatives, ensuring rapid adoption of the latest foundational model capabilities and emerging best practices. To achieve this, you will implement a build-over-buy strategy to minimize friction from reliance on third-party vendors while making judicious investments in those that can expedite our delivery and foster future innovation.This is an exciting opportunity to tackle complex challenges within a dynamic, collaborative, and innovative environment. The ideal candidate will be a thought leader in AI applications for software development, capable of impacting both technical and non-technical team members. You should possess a strong background in mentoring and skill development across our organization and advocate for the integration of AI alongside traditional techniques to enhance both velocity and quality. You will be expected to lead prototype development and production solutions as necessary to facilitate widespread organizational changes.What You’ll Do:Technical Leadership: Provide visionary guidance on enabling and integrating AI throughout the organization.Strategic Partnerships: Collaborate with cross-functional teams to identify and implement AI solutions.

Feb 23, 2026

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