Senior Software Engineer - Internal Tools & Productivity

Join Baseten as a Software Engineer focused on Billing and Internal Tooling, where you will play a crucial role in developing and enhancing our internal systems. You will collaborate with cross-functional teams to create efficient billing solutions and streamline internal processes. Your contributions will directly impact our operational efficiency and customer satisfaction.

Y Combinator is a distinguished accelerator that empowers budding entrepreneurs to launch innovative startups like Airbnb, Stripe, Reddit, and DoorDash. Nestled in the heart of the San Francisco Bay Area, our team collaborates closely to cultivate the next generation of industry leaders. We embody the same philosophies we instill in our startups, making it a unique environment for those familiar with Paul Graham's essays or our engaging YouTube videos.Joining Y Combinator places you in the epicenter of the startup ecosystem.Role OverviewIn our quest to scale operations, we develop a range of software solutions tailored for Y Combinator's internal use. A key focus is creating internal tools that enhance the efficiency of our operations. Our primary users are YC employees such as Group Partners who require productivity tools to engage with thousands of startups, finance teams managing investment documentation, and legal teams addressing diverse startup-related legalities.In this position, you will:Design and develop comprehensive features. Our team is dedicated to supporting founders beyond their batch experience, including creating event software and engagement tools to maintain lasting connections with companies.Collaborate with YC Partners on productivity software. We’ve developed integrations like Gmail plugins and dashboards to facilitate quick engagement with founders.Define and prioritize the development roadmap. We constantly evaluate the balance between effort and impact, with engineers playing a crucial role in determining what features are most essential to tackle next.Assess usage and engagement metrics. We strive to identify what functionalities succeed or fail, emphasizing the importance of continuous improvement for long-term success.Team DynamicsOur software team consists of just 15 full-stack product engineers, fostering a collaborative environment where we all know each other personally. With diverse experiences from major companies like Meta and Google, many team members have also launched their startups. In line with YC's philosophy, our engineers frequently interact with customers and prioritize rapid deployment, while also shaping our roadmap and designing our own projects.

About SesameAt Sesame, we envision a future where technology transcends mere functionality to become an intuitive part of our daily lives. Our mission is to create lifelike computers capable of perceiving, understanding, and interacting with us in a natural way. We are pioneering a new generation of computing focused on integrating voice agents seamlessly into everyday routines. Our team is a blend of innovators from Oculus and Ubiquity6, alongside seasoned professionals from Meta, Google, and Apple, each bringing unparalleled expertise in hardware and software. Join us in crafting a future where computers truly come alive.About the RoleAs a Software Engineer specializing in internal tools at Sesame, you will play a key role in developing and maintaining pipelines and tools that process audio and text data. You will be responsible for producing and evaluating trained AI models for both text and voice interactions. Collaborating with machine learning engineers, researchers, and cross-functional teams, you will create tailored solutions that cater to the needs of your colleagues. The ideal candidate is not only a proficient software engineer but also possesses a keen sense of UI/UX design for custom internal tools. You will develop and sustain React-based web applications that enable teams to manipulate extensive datasets in the cloud, as well as maintain the cloud-deployed Python infrastructure that powers our innovative products. Being a dynamic startup, Sesame values adaptability; therefore, you should be comfortable exploring various technical domains, learning new tools and services, and applying best practices for robust software development and deployment.Responsibilities:Contribute to the enhancement of our machine learning infrastructure, internal tools, and data management systems.Boost developer productivity and ensure application reliability through investment in developer tooling and best practices.Required Qualifications:Demonstrated experience in navigating ambiguous work environments independently.Proven background in machine learning infrastructure, internal tooling, and data management.Experience collaborating with machine learning and research teams.Familiarity with developing consumer-oriented, scalable applications.Knowledge of database management systems.Bachelor's degree or higher in Computer Science or a related field.At least 3 years of professional experience in a similar role.

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!

Join Scribe as a Senior Software Engineer focusing on Billing. In this crucial role, you will design and implement innovative billing solutions that enhance our customer experience and drive operational efficiency. Collaborate with cross-functional teams to define requirements and develop scalable software solutions that meet the needs of our growing customer base.

Join Anthropic as a Staff Software Engineer on our Billing Platform team. In this critical role, you will design and implement robust billing solutions that scale with our growing user base. Collaborate with cross-functional teams to enhance our billing capabilities and ensure seamless processing of transactions. Your expertise will be vital in building systems that are not only efficient but also secure and user-friendly.

About Sentry Sentry helps developers build better software. With over $217 million raised and more than 100,000 organizations, including Disney, Microsoft, and Atlassian, using our platform, we focus on performance and error monitoring that lets teams spend more time building and less time fixing bugs. We work in a hybrid model from our San Francisco hub, with in-office collaboration on Mondays, Tuesdays, and Thursdays. Our tools support companies as they scale, and our team is committed to improving the digital experience for everyone. About the Billing & Revenue Engineering Team This group sits at the intersection of product, finance, and infrastructure. The team ensures every observable event, errors, logs, traces, and session replays, is measured, priced, and billed accurately. Their work directly impacts Sentry’s revenue and customer trust. Success here requires deep experience with distributed systems, a sharp eye for financial accuracy, and a solid grasp of how customers use the product. Collaboration is central. The team works closely with product, engineering, BizOps, marketing, and sales to create systems that support new products and pricing strategies. Role Overview: Senior Software Engineer - Billing This position focuses on building and scaling the core systems behind Sentry’s billing infrastructure. The goal: deliver accuracy and reliability at a large scale. What You’ll Do Work on the next-generation usage tracking pipeline, handling hundreds of billions of events each day with low latency and financial-grade precision. Design flexible pricing models, from per-event billing to complex enterprise contracts, that allow product and sales teams to experiment quickly while maintaining revenue accuracy and speeding up new launches. Help make technical decisions about billing-specific data consistency, including managing delayed events, retroactive pricing changes, and reconciling distributed counts across our infrastructure. What Makes This Role Rewarding Work on hard problems that are easy to describe but tough to solve, all in service of a smooth and accurate experience for Sentry’s customers.

Join Handshake as a Senior Software Engineer specializing in Operator Tooling. In this role, you will be instrumental in enhancing our operational efficiency through innovative tooling solutions. Your expertise will help streamline processes and empower our operators to deliver exceptional outcomes.

Join our dynamic team at gleanwork as a Software Engineer focused on our Billing & Revenue Platform. In this role, you'll be responsible for developing and maintaining our billing systems, ensuring accuracy and efficiency in revenue collection. You will collaborate with cross-functional teams to enhance our platform and deliver exceptional value to our customers.As a key member of our engineering team, you will leverage your expertise in software development to implement innovative solutions that drive our business forward. If you're passionate about technology and eager to make a significant impact in a fast-paced environment, we want to hear from you!

Join Crusoe as a Senior Backend Software Engineer specializing in billing solutions. In this pivotal role, you will architect and develop robust backend systems that facilitate efficient billing processes, ensuring seamless transactions and customer satisfaction. You will collaborate with cross-functional teams to enhance our billing infrastructure and drive innovative solutions that meet our growing business needs.

About Scale AI At Scale AI, we are on a mission to revolutionize the development of artificial intelligence applications. Over the past eight years, we have established ourselves as the premier AI data foundry, driving groundbreaking advancements in generative AI, defense technologies, and autonomous vehicles. Following our recent Series F funding round, we are poised to expand our capabilities in providing frontier data, furthering our commitment to achieving Artificial General Intelligence (AGI). Our focus remains on enhancing model evaluation processes for both enterprise clients and government entities. About the Data Engine Our Generative AI Data Engine is instrumental in powering the most sophisticated large language models (LLMs) and generative models through exceptional Reinforcement Learning with Human Feedback (RLHF), human data generation, model evaluation, safety measures, and alignment. The data we generate plays a crucial role in shaping how humanity interacts with AI technologies. About the Billing Team We are actively seeking innovative Software Engineers to join our dynamic Billing Platform team. In this pivotal role, you will spearhead the development of our revenue tracking and billing system for Generative AI products. Your responsibilities will include designing versatile systems to accommodate diverse customer billing scenarios, implementing intricate billing partitioning strategies based on real-time criteria, and enhancing customer invoice generation along with balance visibility. You will gain extensive exposure to cutting-edge AI applications across enterprises, startups, government agencies, and major technology firms. The ideal candidate is a naturally entrepreneurial engineer who thrives in ambiguous environments, taking charge of outcomes through coding, customer interaction, requirements definition, and more. We believe that the most effective engineers take ownership of outcomes and possess a profound understanding of customer challenges.

Join Cloudflare as a Senior Software Engineer specializing in Billing. In this role, you will work on innovative solutions to enhance our billing systems, ensuring accuracy and efficiency. Collaborate with cross-functional teams to deliver exceptional services to our clients.

Join our dynamic team at Sentry as a Staff Software Engineer specializing in AI Developer Tooling. In this pivotal role, you will contribute to the development and enhancement of cutting-edge AI tools that empower developers worldwide. Collaborate with cross-functional teams to identify challenges and deliver innovative solutions that optimize the software development lifecycle.

At Thinking Machines Lab, our mission is to enhance human potential through the advancement of collaborative general intelligence. We aspire to create a future where everyone can harness the knowledge and tools necessary to utilize AI for their unique objectives.We are a diverse team of scientists, engineers, and builders, responsible for developing some of the most utilized AI products, including ChatGPT and Character.ai, alongside open-weight models like Mistral. Our contributions extend to popular open-source projects such as PyTorch, OpenAI Gym, Fairseq, and Segment Anything.About the RoleWe are in search of a Developer Productivity Engineer who will play a pivotal role in transforming our software development process to be safer, faster, and more enjoyable. Your primary focus will be on AI tools and coding agents, collaborating closely with platform, security, and product engineers to craft state-of-the-art tools for AI-assisted software development, significantly speeding up our internal processes.This role encompasses establishing company-wide platforms and working directly with developers to enhance their individual workflows.Note: This is an evergreen role that remains open for ongoing interest. While we receive numerous applications, there may not always be an immediate match for your skills and experience. We encourage you to apply as we continuously review submissions and reach out as new opportunities arise. You are welcome to reapply after gaining more experience, but please refrain from applying more than once every six months. Occasionally, we post specific roles for targeted projects or teams; in those cases, feel free to apply directly alongside this evergreen listing.What You’ll DoEmpower researchers and engineers to leverage AI for improved coding productivity while maintaining high code quality.Standardize AI coding tools such as Claude Code, Cursor, and Codex, helping to configure, secure, and maintain these tools while balancing organization-wide settings with individual developer preferences.Create secure, reproducible agent sandboxes for remote development and continuous integration testing.Establish golden-path development environments and safeguard measures for sensitive information.Assist individual contributors in crafting their personalized AI-enabled workflows.Monitor tool usage, reliability, and cost.

Join fal as a Software Engineer and play a crucial role in developing the next generation of usage-based billing systems. This is an exciting opportunity for individuals who are enthusiastic about designing scalable, event-driven systems that seamlessly integrate with Stripe and Orb, enabling real-time usage tracking and delivering precise, adaptable billing experiences for our clients. In this position, you will collaborate closely with cross-functional teams, including Product, Finance, and Infrastructure, to ensure our billing system is reliable, accurate, and capable of accommodating evolving pricing models as our product offerings expand.

Join Airwallex as a Senior Software Engineer - AI ToolsAre you ready to make a significant impact in the world of global finance? At Airwallex, we are the leading unified payments and financial platform for businesses around the globe. Our innovative solutions empower over 200,000 businesses, including industry giants like Brex, Qantas, and SHEIN, to seamlessly manage everything from accounts to treasury operations.Founded in Melbourne and now boasting a team of over 2,000 talented individuals across 26 offices worldwide, we are valued at $8 billion and supported by top-tier investors such as T. Rowe Price and Visa. If you're eager to take on challenging projects and grow your career, we want you on our team.What We ValueWe seek dynamic builders with a passion for innovation and a desire to take ownership of their work. You should bring a wealth of expertise and a sharp, analytical mindset, driven by our mission and operating principles. Your ability to make quick yet sound decisions while exploring new avenues will be paramount.As a collaborative team player, you will turn groundbreaking ideas into tangible products and drive our projects to completion. Leveraging AI will be key to working efficiently and solving problems swiftly. Join us in addressing complex challenges with exceptional colleagues while advancing your career in the future of global banking.Your RoleAs a Senior Software Engineer focusing on AI tools, your mission will be to maintain the security of over $150 billion in payments across 150,000 companies and thousands of employees.You will collaborate with internal teams to identify impactful projects, such as developing automation tools, managing our extensive log pipelines, and employing AI to enhance team operations. We value versatility and intelligent problem-solving over specific technologies, so you'll have the freedom to choose the best approaches. Additionally, you'll play a crucial role in mentoring junior engineers and contributing to the growth of our exceptional engineering team.

Join Multiply Labs as a Software Engineering InternAt Multiply Labs, we are at the forefront of innovation in the biotechnology sector, located in the vibrant city of San Francisco, California. With backing from renowned investors including Casdin Capital, Lux Capital, and Y Combinator, our vision is to create the most advanced robotic systems that make life-saving therapies accessible to everyone.We are transforming the landscape of cell therapy manufacturing with sophisticated robotics that streamline production processes. Our technology enables biopharma companies to manufacture cell therapies efficiently and affordably, tackling the traditional challenges of high costs and regulatory hurdles. By leveraging our robotics, we strive to lower the costs of these groundbreaking treatments, which can otherwise exceed $1 million per patient.To explore more about our mission and see our robots in action, visit us at www.multiplylabs.com and connect with us on LinkedIn.About the InternshipWe are seeking enthusiastic Software Engineering Interns to become a part of our dynamic team. In this role, you will contribute to developing production-ready software that will play a pivotal role in the future of personalized medicine and cell therapy manufacturing. Ideal candidates are strong problem solvers, motivated students eager to learn, and excited about the unique experience of working within a fast-paced startup environment.

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.