Principal Software Engineer - Infrastructure

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.

About UsAt Twelve Labs, we are at the forefront of innovation, creating advanced multimodal foundation models that enable machines to understand videos in a human-like manner. Our groundbreaking approach to video-language modeling is setting new benchmarks, enhancing our ability to analyze and interact with diverse media formats.With an impressive $107 million in funding from leading venture capital firms including NVIDIA’s NVentures, NEA, Radical Ventures, and Index Ventures, as well as visionary AI leaders like Fei-Fei Li and Alexandr Wang, we are strategically positioned to drive global innovation. Our headquarters in San Francisco, along with a significant presence in Seoul, illustrates our commitment to reshaping the future of technology.We celebrate the unique journeys of every individual and believe that our diverse backgrounds fuel our creativity and innovation. We invite passionate individuals who share our mission to join us in transforming video understanding and multimodal AI.Role OverviewUnlike typical video engineering roles that focus primarily on enhancing human playback, at Twelve Labs, we engineer video for machine comprehension. This unique approach prioritizes AI model performance over mere perceptual quality. As the Principal Software Engineer for Video Engineering, you will architect and implement our video processing pipelines, overseeing the entire journey from byte ingestion through to playback. Your work will be pivotal in ensuring our systems are efficient, cost-effective, and tailored for AI-driven video intelligence at scale.Your ResponsibilitiesEnd-to-End Ownership: Lead the design and execution of video pipelines, covering ingestion, decoding, chunking, storage, and playback, applicable to both batch and streaming modes.Codec Expertise: Guide the development of decoding strategies, container format management, and codec implementations, ensuring optimal performance for various video types.

Join Gusto as a Principal Software Engineer in our Money Group, where you will play a pivotal role in transforming the way businesses manage their finances. You will lead a team of talented engineers, driving innovation and excellence in our software development processes. Your expertise will help shape our product offerings, ensuring they are both robust and user-friendly.In this role, you will collaborate closely with cross-functional teams, including product management and design, to deliver high-quality software solutions. You will be responsible for architectural decisions, mentoring junior engineers, and fostering a culture of continuous improvement.

Welcome to Demandbase:At Demandbase, we are pioneering the only pipeline AI platform designed to empower go-to-market (GTM) teams in automating growth at scale. Our platform offers a holistic view of data, insights, actions, and outcomes, allowing B2B enterprises to effectively align and implement their account-based GTM strategies with confidence. Trusted by thousands of businesses, we help maximize revenue, reduce waste, and streamline data and technology stacks—all within a single platform.Our commitment extends beyond technology; we invest deeply in our teams, culture, and the communities we serve. Recognized continually as one of the Best Places to Work in the San Francisco Bay Area by Fortune and as one of the 60 Best Companies to Sell For by Selling Power, our offices are strategically located in San Francisco, New York, Austin, Seattle, India, and the United Kingdom.Role OverviewAs a Principal AI Software Engineer, you will spearhead the design and implementation of AI-native platforms that will transform how Demandbase develops and scales intelligent systems. Acting as a technical beacon, you will lead the evolution from traditional SaaS architectures to autonomous, agent-driven systems powered by generative AI.This is a senior-level individual contributor position with significant influence across the enterprise. You will establish architectural directions, collaborate closely with Product and Engineering leadership, and ensure our infrastructure and platforms are equipped to support large language models (LLMs), agentic workflows, and real-time AI-driven capabilities at scale.The base compensation for this position is applicable to candidates based in San Francisco, CA. For candidates located elsewhere, the base compensation will align with the primary work location, as our compensation ranges are location-specific. Actual compensation packages will reflect a variety of factors unique to each candidate, including skill set, years of experience, and depth of expertise.

Join Us in Transforming Healthcare Accessibility!At Assort Health, we are dedicated to ensuring that exceptional healthcare is accessible to everyone, at any time and from anywhere. Our vision revolves around creating a seamless, connected healthcare experience, offering quick answers, clear communication, and easy access to care. To achieve this, we are laying down a revolutionary foundation for patient-provider interactions powered by artificial intelligence, designed to navigate the intricacies of healthcare while catering to the unique requirements of each provider.Assort is recognized as the most comprehensive patient experience platform, utilizing specialty-specific agentic AI. Our omnichannel AI agents integrate effortlessly with electronic health record (EHR) and practice management systems (PMS), eliminating long hold times and operational inefficiencies that prevent patients from receiving timely care.Since our inception in 2023, we have successfully managed over 100 million patient interactions, drastically reducing average hold times from 11 minutes to just 1 minute. Our platform currently supports calls for thousands of providers, boasting an impressive 98%+ resolution rate and 99% accuracy in scheduling. With a patient satisfaction score averaging 4.5/5 from over 52,000 reviews, we have achieved remarkable 20x revenue growth projected for 2025. As we scale rapidly, we are expanding our adoption across the healthcare industry.Your RoleWe are searching for proactive, resourceful, and product-focused Software Engineers to join our dynamic team during an exhilarating phase of our startup's journey. If you aspire to play a pivotal role in developing and scaling cutting-edge products, this is an exciting opportunity to make a lasting impact. You will gain hands-on experience in a fast-paced startup environment, working with advanced generative AI and voice/transcription technologies.As one of our first 30 Engineers, you will be instrumental in driving our company’s growth and success. We are looking for self-starters who are ready to embrace diverse responsibilities and build innovative products from the ground up. This role provides significant autonomy, and you should feel comfortable navigating ambiguity with an entrepreneurial spirit.Key ResponsibilitiesContribute to critical decisions in collaboration with the founders.Collaborate closely with our exceptional engineering team to design and develop features and products from inception.Exercise a high degree of autonomy in tackling complex challenges with innovative solutions.Engage actively in design and development discussions, providing fresh insights and ideas.

Join Cloudflare as a Principal Software Engineer specializing in Resiliency, where you will play a pivotal role in enhancing our systems' robustness and availability. Your expertise will contribute to building and maintaining resilient infrastructure that supports our global network, ensuring our customers receive uninterrupted service.In this role, you will work alongside a talented team of engineers to identify vulnerabilities, implement solutions, and innovate new strategies that enhance system performance and reliability. If you are passionate about software engineering and system resiliency, we invite you to apply!

Join Cloudflare as a Principal Software Engineer specializing in billing systems, where you will play a pivotal role in shaping our payment and invoicing solutions. You will collaborate with cross-functional teams to implement innovative solutions that enhance user experiences and streamline processes. If you're passionate about building scalable software and want to contribute to a fast-paced, innovative environment, we want to hear from you!

Principal Software Engineer Saviynt offers an AI-driven identity platform that effectively manages and governs access permissions for both human and non-human entities across all organizational applications, data, and processes. Our clients rely on Saviynt to protect their digital assets, enhance operational efficiency, and lower compliance expenses. Designed for the age of AI, Saviynt is at the forefront of helping organizations safely advance their AI deployments and utilization. As a recognized leader in identity security, we provide solutions that empower and protect some of the world’s leading brands, Fortune 500 companies, and government institutions. For more details, please visit www.saviynt.com. Role Summary In this pivotal role, you will provide technical leadership and extensive knowledge in complex engineering domains, guiding architectural decisions while ensuring scalability, reliability, and quality across key platform components. As a Principal Engineer, you will act as a technical authority, mentor senior engineers, and tackle the most intricate technical challenges. The Connectors team plays a crucial role in facilitating seamless integrations between Saviynt's Identity Governance platform and a multitude of enterprise applications by developing and maintaining robust, scalable connector frameworks. We are committed to ensuring reliable data synchronization, provisioning, and lifecycle management across diverse external systems, forming a vital foundation for the entire platform. What You Will Be Doing ● Design and architect scalable, high-performance connector frameworks for enterprise application integrations.● Define technical standards, best practices, and design patterns for connector development.● Drive architectural decisions for complex integration scenarios involving over 200 enterprise applications.● Evaluate and recommend new technologies, tools, and frameworks to enhance connector reliability and performance.● Lead technical design reviews and provide guidance on system architecture and design trade-offs.

Join Cloudflare as a Principal Software Engineer, where you will play a pivotal role in designing and implementing innovative software solutions. You will collaborate with cross-functional teams to enhance our platform's scalability, security, and performance, making a significant impact on our global user base.

At HeartFlow, we are revolutionizing the diagnosis and management of coronary artery disease, the leading cause of death globally, through state-of-the-art technology. Our flagship offering, the HeartFlow FFRCT Analysis, is an AI-powered, non-invasive cardiac test recognized by the ACC/AHA Chest Pain Guidelines. It provides a detailed, color-coded 3D visualization of a patient’s coronary arteries, illustrating how blockages affect blood flow to the heart. As pioneers in AI-driven integrated heart care solutions, we are committed to assisting healthcare professionals with tools like RoadMap™ Analysis, FFRCT Analysis, and Plaque Analysis for enhanced patient assessment. Join our growing team and play a vital role in transforming precision heart care.HeartFlow is a publicly traded company (HTFL) renowned for its groundbreaking contributions to healthcare innovation. Our solutions are endorsed by medical societies worldwide and are compliant for use in the US, UK, Europe, Japan, and Canada, having already benefited over 500,000 patients globally.We are in search of a Frontend Software Engineer who is enthusiastic about developing advanced web applications that make a difference in healthcare. If you possess a strong passion for front-end technologies and have a knack for crafting intuitive, high-performance client-side applications, consider joining HeartFlow. As a Frontend Software Engineer, you will collaborate with a team of seasoned engineers to create web solutions that surpass the expectations of healthcare professionals.

About the TeamOpenAI’s B2B Engineering team is committed to delivering our advanced technology to the world through our developer platform and enterprise products. We develop robust backend systems, APIs, and infrastructure that empower developers and organizations to leverage OpenAI's capabilities in production environments.Our expertise encompasses distributed systems, data infrastructure, platform services, and enterprise-grade features such as security, compliance, authentication, and reliability. We collaborate closely with product, research, design, infrastructure, and forward-deployed teams to transform pioneering AI functionalities into scalable and dependable products.About the RoleWe are seeking a Principal Software Engineer to architect and scale the systems that drive our developer and enterprise-facing products. You will take charge of the design for backend services and platform capabilities that safely and reliably integrate new AI functionalities into production at a global scale.This position covers a wide technical landscape, including distributed systems, APIs, databases, data pipelines, and secure enterprise infrastructure. You will play a pivotal role in shaping both the technical architecture and the product experience of our platform, maintaining high standards for performance, safety, reliability, and API design.ResponsibilitiesDesign, implement, and scale backend services, APIs, and infrastructure supporting OpenAI’s developer and enterprise products.Lead the architectural design of distributed systems, databases, and data pipelines that handle large-scale, high-reliability production workloads.Own key platform capabilities from initial technical strategy and design through implementation, launch, and ongoing operation.Carefully shape API design, treating interfaces as core product touchpoints while ensuring a top-notch developer experience.Create secure, reliable, and compliant systems that cater to both enterprise and developer needs.Work closely with product, research, design, infrastructure, and forward-deployed engineering teams to deploy new capabilities into production.Steer technical direction across complex challenges, making sound architectural trade-offs to balance speed, quality, and maintainability.Enhance engineering productivity by developing internal tools, platform abstractions, and systems that amplify efficiency across the organization.

About Our TeamThe GTM (Go-To-Market) Innovation team is a dynamic and innovative group dedicated to transforming customer engagement through cutting-edge applications of our technology. As a vital internal incubator, we enhance the effectiveness of Sales, Technical Success, Enablement, and Revenue Operations by deploying our technology on a large scale. Our mission is to enrich real-world interactions by reshaping customer conversations, learning from each exchange, and discovering new ways to demonstrate the value of our technology.About the RoleWe are seeking talented backend software engineers with a product-oriented mindset to join our GTM Innovation team. In this role, you will play a crucial part in helping OpenAI engage with the world at scale. You will collaborate closely with go-to-market teams to understand their workflows, identify opportunities for improvement, and develop innovative solutions utilizing OpenAI’s API platform.Your agility in moving from prototype to production will be essential, as your contributions will directly influence how customers interact with our technology in real-world settings. This role is perfect for engineers looking to engage directly with users, take ownership of end-to-end outcomes, and pioneer new categories of enterprise software.Key Responsibilities:Develop impactful applications and tools that drive OpenAI’s go-to-market initiatives.Oversee the entire product lifecycle for GTM: prototype, iterate, deploy, and maintain.Collaborate closely with Sales, Technical Success, and Revenue Operations to identify user needs and create tailored solutions.Utilize OpenAI’s models in innovative ways to address real-world customer and internal workflow challenges.Convert insights gained from user interactions into actionable feedback for our Applied and Research teams to guide product development.Qualifications:A minimum of 4 years of experience as a software/ML/product engineer working on user-facing systems.Experience as a founder or early engineer at a startup who has built a product from the ground up is highly desirable.Proficiency in Python or JavaScript and a strong capability in building full-stack applications.Experience building or prototyping LLM-powered workflows using the OpenAI API (or similar technologies).Demonstrated initiative, quick decision-making, and a profound sense of ownership.A passion for collaborating closely with end users to deliver exceptional solutions.

About GustoAt Gusto, our mission is to empower the small business economy. We tackle essential services like payroll, health insurance, 401(k)s, and HR, allowing business owners to concentrate on their passion and their customers. With teams in Denver, San Francisco, and New York, we proudly support over 400,000 small businesses across the nation, while fostering a workplace that reflects and honors the diverse customers we serve. Discover more about our Total Rewards philosophy.About the Role:We are seeking experienced engineers to join our teams focused on enhancing core platform capabilities, optimizing existing systems for scalability, and shaping the future of Gusto's Payroll and Tax systems. As a Principal Software Engineer, you will lead projects from inception to completion, influencing initial feature specifications, optimizing systems towards desired outcomes, executing projects, and maintaining the code that underpins key user experiences. If you are passionate about developing sophisticated software that has a significant impact on the modern economy, we invite you to join us!About the Team:The Payroll team is the core of Gusto’s operations. The Pay Group teams (responsible for payroll and tax) oversee the product, operational, and service aspects that Gusto utilizes to onboard clients, process payroll, calculate taxes and deductions, pay and file with tax authorities, and ensure compliance on behalf of our clients. This domain is intricate and offers opportunities to engage in system design that simplifies processes for both internal and external customers.Sub-Teams:Tax Accuracy: This group is responsible for gathering and maintaining the essential information required to ensure timely and accurate tax payments and filings for our clients, consisting of multiple teams covering various aspects of the process.Ledger: This team is developing a payroll ledger to monitor accrual accounting for payroll-related monetary movements, beginning to support the payroll domain, risk management, payments, and accounting.Engine: This team collaborates closely with the payroll compliance team to facilitate compliant payroll processes, such as minimum wage adjustments and regular pay rates.

At ZoomInfo, we are committed to accelerating careers. We foster a dynamic environment where innovation thrives, empowering you to produce your best work. Our team is dedicated, supportive, and celebrates victories together. With cutting-edge tools that amplify your contributions and a culture that nurtures your ambitions, you'll not only make an impact but also drive change swiftly.As a Principal Software Engineer on our Advertising, Company Intelligence, and Intent team, you will play a pivotal role in designing and implementing the foundational systems that drive our real-time marketing platform. You will work on high-throughput ad infrastructure, large-scale identity resolution, and intelligent systems enhanced by large language models (LLMs), pushing the boundaries of scalability, intelligence, and speed to achieve significant business outcomes.You will join a team engaged in a variety of ambitious and technically challenging projects—from APIs processing tens of billions of events daily to innovative buyer intent algorithms powered by LLMs and a unified B2B identity graph. Your strengths and interests will guide your assignment to initiatives where your impact can be maximized.This role is situated in a high-growth, high-ownership environment at the forefront of modern software engineering, data infrastructure, and applied AI.

About the TeamThe Marketing Innovation team at OpenAI operates within the Demand Generation and Marketing organization, dedicated to creating sophisticated AI-driven systems that significantly enhance revenue generation and marketing functionalities.Our focus is on developing and scaling autonomous systems that effectively engage with customers and optimize internal processes to operate seamlessly at scale. We aim to redefine marketing and revenue operations in an AI-centric environment.We tackle challenges that go beyond conventional low-code tools and automation workflows, stepping in when a native product experience and deep system integration are essential for precision, safety, and reliability.About the RoleWe are seeking innovative software engineers with a product-focused mindset to join our Marketing Innovation team.In this role, you will be responsible for designing and managing autonomous systems that interact directly with enterprise clients, prospects, and critical revenue workflows. You will collaborate closely with leaders in sales, demand generation, and marketing to understand objectives and translate these into robust production systems.Rapidly transitioning from vague problem definitions to operational software will be a key aspect of your work, where success will be measured by the impact you create: namely, revenue growth, enterprise pipeline development, and marketing efficiency.This position is perfect for engineers eager to take ownership of tangible systems, relish the challenge of building innovative products from scratch, and are excited to shape the future of AI-driven solutions and processes.Responsibilities:Develop autonomous and semi-autonomous systems that enhance revenue, pipeline, and marketing efficiency.Oversee the complete product development lifecycle, from initial prototypes to stable production systems, ensuring robust instrumentation and evaluations.Engage with the full technology stack, including API development, orchestration, data management, user interface design, and deployment.Work in tandem with marketing, demand generation, and sales teams to establish success metrics and functional specifications.Utilize OpenAI models and tools creatively, balancing trade-offs between different models, platforms, and architectures.

Join us as a Senior Principal Software Engineer and lead the charge in developing groundbreaking healthcare software that significantly enhances the experiences of patients, clinicians, and caregivers. In this pivotal role, you will guide a talented team through the initial phases of product development while also contributing your coding expertise and expanding your own skill set.The ideal candidate possesses comprehensive full stack experience in building SaaS and/or Cloud Native applications tailored for regulated industries. Furthermore, you will have in-depth knowledge of technologies such as distributed microservice architecture, Go, Ent, gRPC, Twirp, and AWS tools like EventBridge and Aurora. Your ability to share insights and mentor a growing team will be essential.As a Senior Principal Software Engineer, you should thrive in an Agile, collaborative atmosphere, working closely with product managers, designers, external partners, and fellow engineers to craft a high-quality, user-friendly product from the ground up.

Join Crusoe Technologies as a Principal Software Engineer specializing in Software-Defined Networking (SDN). In this pivotal role, you will lead the design and development of innovative networking solutions that leverage SDN technologies. You will work closely with cross-functional teams to enhance our networking capabilities and drive the future of our products.As a thought leader in SDN, you will be responsible for architecting scalable solutions, optimizing performance, and ensuring robust security across our network infrastructure. This is an exciting opportunity to impact the rapidly evolving tech landscape.

Role Overview SoFi is looking for a Principal Software Engineer focused on Member Growth to join the San Francisco headquarters. This role centers on designing and building software that improves the experience for SoFi’s members and supports the company’s mission to help people achieve financial independence. What You Will Do Lead the design and implementation of new software solutions aimed at increasing member engagement and growth. Guide and mentor a skilled team of engineers, providing technical direction and support. Work closely with cross-functional partners to deliver systems that scale with SoFi’s expanding user base. Apply modern technologies and engineering practices to create reliable, maintainable platforms. Location This position is based at SoFi’s San Francisco headquarters in California.

Join Saviynt as a Principal Software Engineer in our Privileged Access Management team, where you will drive innovation and excellence in security solutions. Our Enterprise Identity Cloud empowers organizations to navigate the complexities of cloud initiatives, ensuring robust security and compliance while delivering a seamless user experience. We integrate identity governance, granular application access, cloud security, and Privileged Access Management to create a secure business ecosystem. Trusted by the world's leading brands, Saviynt accelerates digital transformation and supports distributed workforces.We invite you to apply if you are:A Collaborative Partner: You thrive in teamwork, engaging effectively with engineering, product, and cross-functional teams to tackle complex challenges.An Exceptional Problem Solver: You excel at addressing intricate technical issues with innovative, creative solutions while fostering collaboration.A Forward Thinker: Your expertise in software design and architecture allows you to maintain high-quality standards while proactively seeking ways to enhance performance and efficiency.A Customer-Centric Builder: You possess strong interpersonal skills, understanding customer needs and effectively communicating technical solutions to their challenges.An Empowering Mentor: You foster a supportive environment, guiding your team to become self-sufficient while providing constructive feedback and nurturing their growth.