Principal Billing Systems Engineer

Join Cloudflare as a Principal Billing Systems Engineer, where you will be at the forefront of transforming our billing systems to enhance customer experiences and operational efficiency. You will lead the design and implementation of scalable solutions while collaborating with cross-functional teams to ensure seamless integration across our platforms.

Join Stripe as a Senior Staff Engineer specializing in Billing. In this pivotal role, you will lead initiatives to enhance our billing systems, ensuring they are scalable, efficient, and user-friendly. You will collaborate with cross-functional teams, including product managers, designers, and other engineers, to deliver innovative solutions that meet our customers' needs.

Join Ironclad, the premier AI contracting platform that revolutionizes the way agreements are handled. Our platform accelerates contract processing, delivers instant insights, and empowers users with unparalleled control. Whether you are buying or selling, Ironclad integrates the entire process into a single intelligent platform, ensuring leaders maintain the visibility required to stay ahead of the curve. That's why leading organizations, including OpenAI, the World Health Organization, and the Associated Press, trust Ironclad to enhance their business operations.Recognized consistently as an industry leader, Ironclad has earned accolades such as being a Leader in both the Forrester Wave and Gartner Magic Quadrant for Contract Lifecycle Management. We are proud to be recognized by Fortune as a Great Place to Work and listed among Fast Company’s Most Innovative Workplaces. Additionally, Ironclad has been featured in Forbes’ AI 50 and Business Insider’s list of Companies to Bet Your Career On. We are backed by top-tier investors including Accel, Y Combinator, Sequoia, BOND, and Franklin Templeton. To learn more, visit www.ironcladapp.com or follow us on LinkedIn.This position operates in a hybrid model, requiring office attendance at least twice a week on Tuesdays and Thursdays for collaboration. Additional in-office days may be necessary for team or company events.Engineering @ IroncladAs a Software Engineer Intern at Ironclad, you will collaborate with various teams to identify and tackle business challenges by designing, building, and verifying innovative solutions. Your work will contribute to a platform that empowers legal teams to scale their operations effectively, modernizing a profession that has remained largely unchanged for two millennia.You will engage with a modern technology stack that includes TypeScript, React, Node.js, Java, and Docker containers in Kubernetes on Google Cloud Platform. While experience with these specific technologies is advantageous, it is not a requirement. We prioritize a collaborative work environment that fosters inclusivity and allows interns to contribute to real projects while receiving meaningful mentorship, rather than engaging in trivial tasks.About the roleWe are seeking enthusiastic Software Engineer Interns eager to learn and make a tangible impact by shipping real features. You will be integrated into a Product Engineering Team (such as AI, core product, workflow, or platform) and will work on projects that directly influence our customers worldwide.You will partner closely with full-time engineers, product managers, designers, and quality engineers to fully understand user problems and contribute to meaningful solutions.

About the Role OpenAI is looking for a Software Engineer specializing in Kernel Performance and AI Tooling to join the team in San Francisco. This role centers on improving software systems for maximum efficiency and building advanced tools that support AI development. What You Will Do Optimize kernel-level performance across OpenAI's software stack. Design and implement tools that accelerate AI research and deployment. Work closely with engineers to identify bottlenecks and deliver practical solutions. Contribute to technical discussions and share knowledge with teammates. Team and Collaboration Work alongside engineers who are committed to advancing AI technology. Collaboration and innovation are central to the team’s approach.

About AnthropicAt Anthropic, we are dedicated to developing AI systems that are safe, interpretable, and controllable. Our mission is to ensure that AI technology benefits not just our users, but society as a whole. We are a dynamic and rapidly expanding team of researchers, engineers, policy experts, and business leaders, all working collaboratively to create AI solutions that truly enhance human capability.About the RoleThe Research Tools team at Anthropic is at the forefront of AI safety and capability research, and we require outstanding software solutions to optimize our efforts. As a Senior Software Engineer on this team, you will be pivotal in creating the infrastructure and applications that empower our researchers to conduct complex experiments, iterate rapidly, and derive insights from cutting-edge AI systems.This role merges product development with full-stack engineering. You will collaborate closely with researchers and engineers to understand their workflows, identify roadblocks, and deliver swift solutions that enhance productivity. Whether you are developing interfaces for human feedback on model evaluations, creating platforms for orchestrating experiments, or crafting innovative visualization tools to interpret model behavior, your contributions will significantly advance our mission to build trustworthy AI systems.We seek an individual who thrives in ambiguous environments, possesses a high degree of autonomy, and can swiftly acquire domain knowledge to drive impactful projects from inception to completion.No prior machine learning or research experience is necessary.

About the Role:We are seeking a talented and experienced Senior Software Engineer to join our dynamic team focused on developing cutting-edge financial products for Android. In this role, you will leverage your expertise in Android development to create innovative solutions that enhance user experience and drive our mission forward.Key Responsibilities:Design and implement scalable Android applications for financial products.Collaborate with cross-functional teams to define, design, and ship new features.Ensure the performance, quality, and responsiveness of applications.Identify and fix bugs, and enhance application performance.Stay up-to-date with new technology trends and best practices in mobile development.

Join Strava: Where Active Lives ThriveStrava is the premier application for active individuals, boasting a vibrant community of over 180 million athletes across more than 185 countries. It's not just about tracking workouts; it's about fostering progress and achieving personal milestones together. Whether you enjoy running, cycling, swimming, or any other sport, Strava is your partner in success. Connect with others, surpass your goals, and ensure that every effort counts. Embark on your journey with Strava today.Our mission is straightforward: to inspire individuals to lead their most active and fulfilling lives. We firmly believe in the transformative power of movement to unite and propel people forward.As part of the Foundation engineering team at Strava, you will play a critical role in maintaining the infrastructure that supports millions of athletes worldwide. We design and refine tools and systems that empower our developers, sales, and support teams to deliver features with confidence, safety, and efficiency. In your role as a Senior Engineer, you will be instrumental in shaping and enhancing Strava’s internal platform and administrative tools. This is your chance to significantly impact by modernizing internal tools for customer support teams, enhancing their productivity and their ability to deliver outstanding athlete experiences.We embrace a hybrid work model, allowing you to spend more than half your time on-site at our San Francisco office — three days each week.

P-97 At Databricks, we are on a mission to fundamentally simplify the entire data lifecycle—from ingestion and ETL to BI and ultimately to ML/AI—through a unified platform. We envision a future where the traditional data warehouse architecture is transformed by an innovative architectural model known as the Lakehouse (CIDR 2021 paper). This open platform merges data warehousing with advanced analytics, effectively addressing critical challenges such as data staleness, reliability, total cost of ownership, data lock-in, and limited use-case support. A key component in realizing this vision is the development of a next-generation decoupled query engine and structured storage system that surpasses the performance of specialized data warehouses while maintaining the flexibility of general-purpose systems like Spark™ to cater to a wide range of workloads, from ETL processes to data science applications. As a vital member of our team, you will engage in the design and implementation of these next-generation systems that aim to leapfrog the current state-of-the-art in the following areas: Query compilation and optimization Distributed query execution and scheduling Vectorized execution engine Data security Resource management Transaction coordination Efficient storage structures (encodings, indexes) Automatic physical data optimization

About OliveAt Olive, we are revolutionizing the way companies build internal tools by enabling them to create sophisticated applications simply by expressing their needs in natural language.Internal tools are crucial for modern organizations, serving as the operational backbone for various functions, from sales dashboards to trust and safety workflows. Currently, the process of developing these tools is cumbersome and time-consuming, often draining engineering resources.Our innovative platform leverages advanced large language models (LLMs) and code generation techniques to assemble fully functional internal tools in mere minutes, seamlessly integrated with company data. This empowers businesses to gain deeper insights and enhance their operational efficiency.Having secured a $2.1M seed funding from esteemed investors and industry pioneers, we are now in an exciting phase of expanding our team.This position offers a unique chance to contribute to a transformative project that demands both skill and speed. If you are passionate about making a significant impact, we encourage you to apply.

We appreciate your interest in joining the Uncountable Engineering team!Position OverviewUncountable is on the lookout for enthusiastic interns who are eager to embark on a journey in full-stack software engineering. Our mission is to transform the landscape of industrial research and development. We seek passionate engineers ready to contribute to the creation of an advanced development platform utilized by Fortune 500 companies.Potential ProjectsYou'll have the opportunity to design databases for enhanced analytical capabilities and develop innovative interfaces and views that empower scientists in managing experiments.EligibilityWe will only consider candidates who are graduating within a year of the internship.Compensation: $6,000 per month

ABOUT BASETENAt Baseten, we empower cutting-edge AI companies, including Cursor, Notion, OpenEvidence, Abridge, Clay, Gamma, and Writer, to achieve mission-critical inference. By merging advanced AI research with flexible infrastructure and intuitive developer tools, we facilitate the deployment of innovative AI models into production. Having recently secured a $300M Series E funding round from esteemed investors like BOND, IVP, Spark Capital, Greylock, and Conviction, we are on a rapid growth trajectory. Join our team and contribute to building a platform that engineers rely on to launch AI products successfully.THE ROLEAs a key member of Baseten's Platform Team, you will play a crucial role in developing internal infrastructure to support our engineering division. While our product offers infrastructure for AI advancements, your primary focus will be on crafting robust internal systems that enhance productivity, collaboration, and work quality across engineering teams, leveraging exceptional tools, efficient workflows, and resilient development settings.If you have a passion for elegant solutions—such as streamlined monorepos, rapid CI pipelines, and well-designed shared libraries—you will excel at Baseten.RESPONSIBILITIESDevelop a range of tools customized to meet the diverse needs of engineering teams.Enhance monorepo functionality and create project templates to ensure consistency and efficiency.Design and implement shared libraries focused on system observability.Optimize the speed, reliability, and thoroughness of our CI pipelines.Assist in designing and maintaining Terraform modules for effective infrastructure management.Provide innovative solutions to improve visibility within continuous delivery (CD) processes.Proactively support engineering teams, ensuring they have the necessary resources and tools for maximum productivity.REQUIREMENTSProficiency in Go and/or Python programming languages.Experience with Kubernetes and Docker tools (e.g., Helm, Docker, Kubernetes).Demonstrated experience managing and working with large monorepos.Strong problem-solving skills with an emphasis on efficient software delivery.Familiarity with CI/CD methodologies and tools.Excellent communication and collaboration skills.

P-188 At Databricks, we are on a mission to revolutionize the data lifecycle—from ingestion and ETL to business intelligence and advanced machine learning. Our vision is centered around a unified platform that replaces the conventional data warehouse architecture with a cutting-edge Lakehouse model (CIDR 2021 paper). This innovative architecture aims to tackle significant challenges such as data staleness, reliability, total cost of ownership, data lock-in, and limited support for diverse use cases. A pivotal element of achieving this vision is the development of the next generation of decoupled query engines and structured storage systems that can surpass the performance of specialized data warehouses while retaining the versatility of general-purpose systems like Apache Spark™. This capability is essential for supporting a wide range of workloads, from ETL processes to complex data science applications. As a key member of this team, you will engage in one or more of the following areas to design and implement systems that set new standards in the industry: Query compilation and optimization Distributed query execution and scheduling Vectorized execution engine Data security Resource management Transaction coordination Efficient storage structures (encodings, indexes) Automatic physical data optimization

About Our TeamAt OpenAI, our Applications Engineering team is pivotal in crafting and enhancing our core productivity ecosystem. We are not just custodians of SaaS solutions; we develop tailored tools, integrations, and automation processes that address challenges that off-the-shelf software cannot. Our deep technical expertise allows us to bridge gaps between teams and operationalize applications for scalability, providing secure, seamless, and innovative experiences for our employees. We thrive on designing and implementing custom solutions that streamline workflows, reduce friction, and enhance productivity, enabling teams to concentrate on their primary missions.About the PositionAs a Software Engineer focused on Internal Applications for Enterprises, your primary responsibility will be to elevate employee technology services through automation, Infrastructure-as-Code (IaC), and the creation of advanced workforce tools. You will utilize OpenAI's models to optimize identity and access management (IAM) systems, develop applications and dashboards for internal users, and automate complex workflows. This position entails designing and implementing efficient, secure, and scalable solutions, including intelligent Slack bots and integrations that bolster operational efficiency and enhance user experience.We are looking for innovative individuals who are passionate about harnessing automation and software engineering to tackle complex workforce technology challenges. A robust background in infrastructure automation, cloud services, and a thorough understanding of identity management solutions is essential. Your ability to construct scalable and resilient systems, combined with a problem-solving orientation, will be critical to your success in this role.Your Responsibilities Will Include:Designing, building, and maintaining secure, scalable, and high-performance workforce technology infrastructure, automation workflows, and customized tools to enhance the OpenAI employee experience.Delivering essential IT efficiencies and automation through custom software development and first-party tools to improve technology service delivery.Utilizing modern Infrastructure-as-Code (IaC) practices, developing GitOps-driven solutions to manage technology workflows at scale.Creating and managing CI/CD pipelines for corporate infrastructure, ensuring deployment to progressively tested environments across multiple clouds (Azure, AWS, GCP).Developing scalable internal tools and dashboards to enhance workflows and improve visibility.

About Atomic SemiAtomic Semi is pioneering a compact and rapid semiconductor fabrication facility. Our goal is to harness today’s technology to build innovative solutions with streamlined processes. We are committed to creating our own tools to facilitate swift iterations and enhancements.We are assembling a small team of exceptional, hands-on engineers across various disciplines, including mechanical, electrical, hardware, computer, and process engineering. Our team will take ownership from atomic-level designs to complete architectural solutions. We are optimistic about the future and eager to push the boundaries of technology.We believe that smaller, faster, and self-built solutions are superior. Our lab is equipped with advanced tools such as 3D printers, a variety of microscopes, e-beam writers, and general fabrication equipment, and we are ready to invent whatever is missing along the way.Atomic was founded by Sam Zeloof and Jim Keller. Sam is renowned for his garage-made chips, while Jim brings over 40 years of leadership experience in the semiconductor industry.About the RoleWe are seeking an Automation Software Engineering Intern for the upcoming fall semester, starting in September. We prefer a commitment of 4 to 8 months. As part of an integrated engineering team, you will engage in building semiconductor fabrication equipment, tackling intriguing engineering challenges.Our small size enables interns to undertake significant responsibilities, contributing to mission-critical projects. You will enjoy substantial autonomy on interdisciplinary initiatives that enhance our semiconductor fabrication processes and improve robot efficiency. Ideal candidates should have a background in motor controllers, path planning, and trajectory control.We prioritize rapid prototyping and testing—aiming to build and verify solutions within days or weeks, not months. Therefore, a portfolio showcasing your work (such as a GitHub link) is required to apply, demonstrating your software engineering skills and curiosity.

Join Cloudflare as a Senior Engineering Manager in the Billing department, where you will lead a team of talented engineers to enhance our billing systems. You will play a pivotal role in driving the development of scalable solutions that support our rapidly growing customer base.

About the OpportunityJoin Triumph Arcade as a Software Engineering Intern and immerse yourself in the dynamic environment of our engineering team. From day one, you will have the chance to engage directly with our codebase. We seek inquisitive, innovative, and motivated individuals who are eager to learn rapidly while contributing meaningful work. While we don't expect you to have all the answers, we value your curiosity, receptiveness to feedback, and enthusiasm for teamwork.Important Note for Applicants: By submitting your application, you will be considered for multiple internship positions available across our engineering teams. Please submit only one application.Our internships last for 12 weeks, are paid, and are full-time, available either in the summer or fall of 2026 (please specify your preference in your application). All internships will take place at Triumph’s headquarters located at Levi’s Plaza in San Francisco, with the team working in the office five days a week.What You Will AccomplishDesign, develop, and deploy features from conception through to execution, collaborating with your team to define the challenges we aim to solve.Work closely with engineers, designers, and product managers, participating in code reviews, design brainstorming sessions, and sprint planning meetings.Produce clean, tested, and well-documented code that allows your fellow engineers to build confidently on your work.Troubleshoot real-world issues in our systems and gain insights into the operations, monitoring, and enhancement of production software.Showcase your contributions by presenting your project to the broader engineering team at the end of your internship.QualificationsCurrently pursuing a Bachelor's or Master's degree in Computer Science, Software Engineering, or a related technical field, with an anticipated graduation date between August 2026 and June 2028.Proficient in at least one modern programming language relevant to your track (e.g., JavaScript/TypeScript, Go, Swift).Basic understanding of data structures, algorithms, and software design principles.Experience in developing at least one project outside of coursework, including personal projects, hackathons, open-source contributions, or previous internships.Strong written and verbal communication skills, with the ability to articulate technical concepts clearly.Adept at thriving in a fast-paced, collaborative setting where priorities may shift quickly.

About the RoleWe are seeking a highly skilled Senior Automation and Tools Engineer to enhance our platform's scalability, reliability, observability, and operational excellence. In this pivotal role, you will collaborate with engineers and data scientists to design, automate, and sustain the infrastructure that drives our core platform, which includes data pipelines, machine learning workloads, and real-time analytics systems.This is a hands-on, impactful position with visibility across the tech stack, providing a unique opportunity to influence the future of our infrastructure and operations.Key ResponsibilitiesCollaborate closely with Site Reliability Engineers (SREs) and developers to automate and manage datacenter and cloud-based infrastructure, focusing on build and deployment systems, as well as configuration management.Enhance system reliability and performance through automation, observability, and proactive capacity planning.Develop and configure tools for datacenter provisioning, configuration management, and observability using both standard and custom tools.Elevate developer experience by providing self-service tools.Implement and uphold monitoring, alerting, and incident response processes including Service Level Objectives (SLOs), runbooks, and on-call rotations.Foster collaboration across engineering and data science teams to cultivate a culture of performance and reliability.Maintain security, compliance, and operational readiness across our physical and cloud infrastructures.Lead post-incident reviews and continuous improvement initiatives.

About Multiply LabsMultiply Labs stands at the forefront of innovation in San Francisco, California, backed by premier tech and life science investors including Casdin Capital, Lux Capital, and Y Combinator. Our mission is to create unparalleled robotic systems that make cutting-edge life-saving therapies accessible to everyone.We are transforming the landscape of cell therapy manufacturing through the development of advanced robotics designed to automate and scale production of these essential treatments. Our robots enable biopharma companies to efficiently produce cell therapies while minimizing disruption to their existing processes, thereby reducing regulatory challenges and risks. Traditional methods are often laborious and costly, with expenses exceeding $1 million per patient; our robotics-driven solutions aim to democratize these life-changing therapies, making them more affordable for those in need.For more insights and videos showcasing our robots, visit us at www.multiplylabs.com and follow us on LinkedIn.About the RoleWe are seeking passionate Robotics Software Engineering Interns to become integral members of our collaborative team. You will contribute to the development of production-ready software that will play a pivotal role in shaping the future of personalized medicine and cell therapy manufacturing systems. This opportunity is ideal for motivated students who are eager to solve complex problems and gain firsthand experience in an early-stage startup environment.

About Our TeamAt OpenAI, our Applied team is dedicated to responsibly harnessing state-of-the-art technology for the benefit of society. We have pioneered transformative products like ChatGPT, DALL·E, and comprehensive APIs for GPT-4 and GPT-3, along with advanced embeddings and fine-tuning capabilities. Our team also oversees extensive inference infrastructure that supports our broadening impact.Our clients leverage our APIs to build innovative businesses, unlocking features that were previously beyond reach. ChatGPT serves as a testament to the immense possibilities we offer. We emphasize the ethical application of our powerful tools, prioritizing secure deployment over unfettered growth.Within the Applied Engineering sector, the Financial Engineering team is pivotal in ensuring effective monetization of our products to cater to diverse customer requirements. Working in close tandem with the Go-To-Market and Finance teams, we aim to adapt our billing infrastructure to meet our changing internal needs. We are on the lookout for a seasoned engineer to design and enhance our billing systems, improving their functionality to accommodate our increasingly intricate and expansive product portfolio.Key Responsibilities:Design and develop the next generation of billing and monetization systems at OpenAI.Implement solutions across the tech stack to establish robust billing integrations for our ChatGPT and API clientele.Craft a flexible billing platform supporting both subscription and usage-based models, ensuring it is scalable and enterprise-ready.Develop tools that allow internal teams to effortlessly integrate billing data into their operations.Engage collaboratively with a diverse range of stakeholders, including Product, Data, Finance, and Go-To-Market teams, alongside fellow engineers.Ideal Candidate Profile:A minimum of 5 years of professional software engineering experience; expertise in payments, billing, or monetization is a plus.A passion for collaborating with various partners, especially those beyond the engineering domain.A strong desire to learn and grow, with the ability to convey knowledge clearly to others.Demonstrated experience in developing and refining production systems to enable new product features and tackle scaling challenges.Exceptional problem-solving abilities and a proactive approach to tackling complex challenges.

Kira creates AI-native tools that support educators in building content, assessing student work, and providing feedback at scale. Schools, districts, and universities already rely on Kira’s platform. As an early-stage company, Kira values team members who deliver real-world results and take ownership of their work. Internship Overview This is a full-stack Software Engineering Internship based in San Francisco for Summer 2026. Interns work on production systems used by students and teachers, not just side projects. During the 12-week program, each intern leads a product feature from design through deployment. The role is a good fit for those who work independently and set high standards for themselves. Sample Projects AI-powered grading and feedback tools Dashboards and workflow interfaces for students and educators Internal tools to support curriculum and operations teams Infrastructure for LLM-based features, including evaluations and prompt iteration Tech Stack Frontend: TypeScript, React, Next.js Backend: Node, Python Data: APIs, databases, system integrations What You Will Do Take ownership of a scoped project with a clear user goal, from planning to launch Write production-quality code that goes through review and testing Join design discussions and participate in code reviews Collaborate with product and design teams to clarify requirements and evaluate trade-offs Debug and fix real issues to improve system reliability and performance Work on AI-driven features as part of your project Requirements Ability to work independently and demonstrate strong technical skills Currently enrolled in an undergraduate Computer Science or related program and returning to school in Fall 2026