Staff Software Engineer - Billing & Subscription

At Klaviyo, we celebrate the diverse backgrounds, experiences, and perspectives that our team members, whom we affectionately call Klaviyos, contribute to our vibrant workplace. We believe in providing everyone with an equal opportunity for success and value the unique experiences that go beyond conventional job expectations. If you feel you are a close match for this role, we encourage you to apply. To discover more about life at Klaviyo, visit klaviyo.com/careers and learn how we empower creators to take charge of their own futures.About the TeamThe Klaviyo Billing & Monetization team is far from the traditional billing department you might envision. We manage the payments and enforcement infrastructure that enables hundreds of thousands of businesses to send billions of emails and texts, especially during peak periods like Black Friday Cyber Monday. Our team is tasked with tracking product usage for billing purposes, managing customer subscriptions and payments, and strategizing pricing for both new and existing products. As Klaviyo continues to grow, our team will be pivotal in capturing revenue across domestic and international markets, developing features that enhance user understanding of their spending, ensuring compliance with regulations, facilitating internationalization, and implementing all pricing-related changes at Klaviyo.About the RoleWe are looking for a Software Engineer II to join our Billing & Monetization team and help propel Klaviyo's mission to provide entrepreneurs with top-notch tools at unbeatable prices. In this role, you will influence key decisions that impact Klaviyo’s expansion into international markets, manage relationships with large clients that have unique payment needs, and shape how new products are priced and packaged.Your ImpactLead the development of customer-facing products that enhance transparency in billing.Innovate methods to accurately and reliably track billions of product usage events.Collaborate with Klaviyo customers and stakeholders to create a platform that maximizes value for users and Klaviyo alike.Contribute to building robust features that clarify billing processes and pricing strategies.

At Compass, we are driven by our mission to help everyone find their perfect place in the world. Established in 2012, we are transforming the real estate landscape with our innovative end-to-end platform, empowering residential real estate agents to provide exceptional service to both sellers and buyers.As a Staff Software Engineer within the Transaction Journey organization, you will leverage your expertise in microservices architecture to develop impactful products for our customers. You will take the lead in designing and developing services that enhance the consumer experience while supporting the expansion of the world’s most scalable brokerage. You will guide a team in creating a collaborative transaction management platform that simplifies the home buying and selling process, enabling agents to efficiently manage transactions from initial contact to closing, including accessing local forms, sending documents for electronic signatures, and managing offers for buyers and sellers.We are looking for an engineer who is passionate about crafting well-defined APIs that are user-friendly. Your insights in product and business decisions are invaluable, and you have a strong desire to learn and share knowledge with your colleagues. Your communication skills are exceptional, and you prioritize understanding others before conveying your ideas.Your design systems are fault-tolerant, scalable, highly available, well-tested, and adhere to best practices such as the single responsibility principle.Your code is modular and reusable, and you take pride in delivering robust, well-tested, peer-reviewed code that follows industry best practices. You hold strong opinions regarding code structure, style, and development processes.At Compass, You Will:Provide strategic direction and ownership of Compass software architecture.Build, develop, and scale the platform that empowers real estate professionals, buyers, and sellers.Become a domain expert in real estate technology, serving as an empathetic partner to our customers.Inspire, recruit, and mentor fellow engineers.Lead the architecture of our distributed microservices environment.Engage in a scalable engineering culture that utilizes modern principles of decoupled systems and automated CI/CD/testing/monitoring to enhance efficiencies.Execute standard agile development methodologies.Join a dynamic team with high visibility and exciting projects on the horizon.

About Datadog: At Datadog, we are dedicated to creating the ultimate platform for engineers to monitor and optimize their systems, applications, and teams. Our operations scale to trillions of data points daily, ensuring continuous alerting, metric visualization, log management, and application tracing for thousands of clients. Our engineering ethos prioritizes practicality, transparency, and simplicity to tackle complex challenges effectively. The Opportunity: As a Staff Engineer at Datadog, you will be a pivotal technical leader, driving innovations that will support our growth for the next five years and beyond. Your contributions will span across three key areas: 1. As an individual contributor, you will apply your exceptional technical expertise to create industry-leading systems in domains like data visualization, virtual runtime profiling, and large-scale streaming. 2. In your role as a technical leader, you will leverage your extensive technical knowledge and communication skills to address design and architectural challenges across the organization, steering the strategic direction and leading implementation efforts. 3. You will actively engage in the staff engineering community, sharing insights from industry best practices and past projects to enhance company-wide standards in software and systems engineering. Examples of projects you might spearhead include designing a new data storage engine capable of processing hundreds of millions of records per second, leading the development of a new product like Synthetics or Profiling, or restructuring a critical service to manage significantly increased scalability.

About SunoAt Suno, we are revolutionizing the music industry by harnessing the power of cutting-edge AI technology. Our innovative platform, featuring the advanced Suno Studio, enables users from all walks of life—from shower singers to professional musicians—to unleash their creativity and share their musical journeys. Join us in our mission to inspire and connect a vibrant community of music creators and enthusiasts across the globe.About the RoleWe are seeking passionate and skilled generalist software engineers to join our dynamic team. You will collaborate directly with our founding members, playing a pivotal role in shaping the technical and design aspects of our products. This is an incredible opportunity to have a significant impact on the future of music creation.What You’ll DoDevelop and enhance Suno’s applications for music creation, exploration, and listening.Design and implement robust services capable of handling high volumes of user traffic and data.Construct systems that prioritize performance, scalability, and ease of monitoring.What You’ll NeedA minimum of 7 years of experience in backend or full-stack development is preferred.A can-do attitude with the ability to tackle challenges across various technical domains.Proficiency in distributed systems, data storage solutions, and handling production-scale workloads (Postgres, Redis, Kafka, etc.).Experience with web technologies such as React, Typescript, and NextJS is advantageous.A strong passion for creating exceptional user experiences, coupled with a commitment to rapid iteration and improvement.Previous technical leadership or management experience is a plus.An enthusiasm for music, whether listening, discovering, or creating, is highly desirable.A Bachelor’s degree or equivalent experience is required.Additional Notes: Applicants must be eligible to work in the United States.Perks & Benefits for Full-Time EmployeesEquity package in the company.401(k) plan with a 3% employer match and Roth options.Comprehensive medical, dental, and vision insurance (PPO with HSA & FSA options).Flexible work hours and remote work opportunities.

Join the Suno TeamAt Suno, we are revolutionizing the music industry by harnessing the power of cutting-edge AI technology. Our platform empowers creators from all walks of life—whether you're a casual singer in the shower or a professional artist—to unleash their musical potential through innovative tools like Suno Studio, a game-changing generative audio workstation. We are on a mission to foster a vibrant community where music is created, shared, and discovered, making musical expression accessible and enjoyable for everyone.Your Role as a Senior Software EngineerWe are seeking passionate individuals to join our foundational software engineering infrastructure team. In this role, you will collaborate closely with our founding members, taking charge of a diverse range of technical and design decisions that shape the architecture and products at Suno.Key ResponsibilitiesDesign and implement robust services capable of managing high consumer traffic and data loads.Create systems that prioritize performance, security, scalability, and observability.Set a standard for operational and software engineering excellence by leading through example.Desired QualificationsA minimum of 5 years' experience in infrastructure-related roles.Proficiency with cloud platforms (AWS/GCP), container orchestration (Kubernetes), and tools for infrastructure as code (Pulumi/Terraform/CDK).Demonstrated experience in scaling infrastructure from conception to execution.Strong expertise in Postgres and distributed relational databases, with experience in large-scale database hosting considered a plus.Excellent backend development skills aimed at optimizing application performance; familiarity with websockets, CDNs, and streaming traffic patterns is advantageous.Thorough understanding of security best practices relevant to infrastructure design and scaling.Experience in MLOps, large-scale inference, and ML data pipelines is a plus.A commitment to engineering excellence, rapid iteration, and continuous learning.Prior experience in technical leadership or management is a bonus.A passion for music—whether listening, exploring, or creating—would greatly enhance your fit with our team.A Bachelor's degree or equivalent experience is required.Note: Candidates must be eligible to work in the United States.

Senior/Staff Software Engineer, Applications AcuityMD is an innovative software and data platform that accelerates the accessibility of medical technologies. We empower MedTech companies to gain insights into product usage, understand customer variations, and pinpoint opportunities that enable physicians to enhance patient care. Annually, the FDA approves approximately 6,000 new medical devices, and our solution streamlines the process of getting these products into the hands of physicians, ultimately improving patient outcomes. Supported by prominent investors like Benchmark, Redpoint, ICONIQ Growth, and Ajax Health, we are a rapidly expanding SaaS company. We are seeking a talented Senior/Staff Engineer to join our dynamic Customer Intelligence Team. This role offers the chance to engage in all facets of current and future product development. Collaborate with other passionate engineers on challenging projects that introduce cutting-edge technologies to patients. Team Mission Within the Application Team, our goal extends beyond engineering software; we are transforming how medical technologies are delivered to those in need. The Customer Intelligence Team empowers MedTech companies to expedite the adoption of state-of-the-art medical technology by optimizing their sales processes through seamless and context-rich workflows. Assist our clients in strategizing their sales efforts to both existing and prospective users by integrating market data and AI-driven recommendations into their daily operations. We collaborate with top-tier MedTech companies and are on a journey of rapid feature development to guarantee their success. Your contributions will be pivotal in delivering impactful, high-quality, and scalable solutions that truly matter. You will collaborate with Product Managers, Designers, and fellow Engineers to build comprehensive features across both web and mobile platforms. We prioritize delivering excellent work while fostering a fun, collaborative, and supportive team environment, as we believe strong relationships enhance our collective performance! Advance your career while working on meaningful projects across various tech stacks, including JavaScript, React, TypeScript, GraphQL, Node.js, Python, and SQL.

At Asimov, we are dedicated to revolutionizing humanity's capacity to engineer living systems, paving the way for biotechnologies that significantly enhance societal well-being. Our endeavor includes the development of an innovative mammalian synthetic biology platform—spanning from cellular structures to complex software—to facilitate the creation and production of cutting-edge therapeutics.Imagine the challenges of software engineering without an Integrated Development Environment (IDE). Consider how modern aviation relies on Computer-Aided Design (CAD). Genetic engineering is poised to be even more complex—and we are at the forefront of constructing the essential tools to empower bioengineers. Our platform, Kernel, is designed for bioengineers to confidently design, construct, and debug genetic systems just as seamlessly as code is deployed. We are in search of a Staff Software Engineer to join our mission and help us refine our offerings.Role Overview:Take charge of architectural decisions that will influence Kernel's development for years to come, providing you with substantial ownership over the system's evolution.Craft GraphQL APIs for the searching, editing, and analysis of tens of thousands of genetic constructs utilizing Python 3, SQLAlchemy, and Strawberry.Design data models that accurately reflect the intricate nature of biological systems.Engage directly with synthetic biologists to gain insights into their workflows and identify transformative tools that can enhance their productivity.Participate in an on-call rotation to support the software you have contributed to developing.Candidate Profile:A minimum of 10 years of experience in building production-level software—systems relied upon by other engineers, rather than one-off research code.Extensive expertise in Python 3, with additional familiarity with GraphQL, SQLAlchemy, and/or Strawberry preferred.You are the type of engineer who immerses deeply in engaging technical challenges. You seek stimulation that leads to fresh ideas you are eager to explore.You contemplate API design, data migrations, and the implications of scaling the system to handle tenfold usage.You aspire to collaborate closely with a dedicated team to design a product, rather than merely executing predefined coding tasks. You can navigate the uncertainties associated with pioneering initiatives.

Role Overview Anduril Industries is hiring a Staff Software Engineer to focus on QualityOS in Boston, Massachusetts. This role centers on improving software systems to meet high standards for quality and performance. The work supports advanced technology efforts in national defense. What You Will Do Enhance and maintain QualityOS software systems Ensure products achieve strong quality and performance benchmarks Collaborate with other engineers and teams to advance technology solutions Apply technical expertise to projects with direct impact on defense capabilities Who We’re Looking For Creative problem solvers who enjoy working with others Engineers interested in building and improving technology for national defense Those who bring innovative ideas and a commitment to high-quality software

Join Our Team as a Staff Software Engineer!About Activ SurgicalActiv Surgical is a pioneering medical device startup on a mission to revolutionize surgical visualization through state-of-the-art imaging, computer vision, and AI technologies. Our flagship product harnesses these advanced solutions to provide enhanced clinical insights for laparoscopic and minimally invasive surgeries. We are looking for a skilled Staff Software Engineer to join our dynamic and collaborative software team. This role presents an exciting opportunity to tackle complex technological challenges in the realms of medical imaging, computer vision, machine learning, and real-time systems, directly contributing to life-saving products utilized in operating rooms.Position OverviewAs a Staff Software Engineer, you will be instrumental in all facets of software development, promoting the adoption of our existing product by integrating Activ Surgical technology with key strategic partnerships and aiding in the development of our next-gen platform. Your contributions will empower surgeons with advanced visualization and decision-making tools in the OR. You will act as a technical expert in implementing contemporary software design principles to create scalable, high-performance software solutions for laser speckle contrast imaging (LSCI) and fluorescence imaging systems on Windows platforms. Utilizing your robust engineering skills and analytical proficiency in data analysis, computer vision, and real-time systems, you will independently design and develop innovative, high-quality medical device software. A reliable team player, you collaborate seamlessly with engineers across various disciplines to develop breakthrough solutions in a fast-paced environment. Your positive and enthusiastic mindset enables you to maintain professionalism and composure under pressure while adhering to critical deadlines.Key ResponsibilitiesProduct Development- Enhance and maintain the overall Activ Surgical application software system and internal tools.- Employ modern design methodologies to develop new features and improvements across software architecture, user interface, databases, and networks from conception to product launch.- Engage in research and development of laser speckle contrast imaging (LSCI) algorithms and techniques, leveraging machine learning, advanced computer vision, and other cutting-edge technologies.- Create rapid prototypes to showcase new features and validate concepts.

Role Overview Anduril Industries is hiring a Staff Software Engineer to focus on maritime technology in Boston, Massachusetts. This position centers on building software that supports maritime operations and national security efforts. What You Will Do Design and develop software solutions for maritime systems Collaborate with engineers and stakeholders to deliver reliable technology Contribute to projects that support critical security and operational goals Who Succeeds Here Strong interest in technology and innovation Comfort working with others on complex problems Ability to adapt to changing priorities and project needs This role is based in Boston, Massachusetts.

Role overview Anduril Industries seeks a Staff Software Engineer in Boston, Massachusetts to focus on undersea reconnaissance and strike systems. The position involves building and improving software that advances national defense and security goals. Key responsibilities Design, develop, and enhance software supporting undersea reconnaissance and strike operations. Collaborate with fellow engineers to address complex technical problems. Use advanced technologies to deliver solutions that directly affect defense missions. Team and collaboration This role combines hands-on engineering with regular teamwork. Engineers here share a strong commitment to projects with national significance, emphasizing practical problem-solving and technical excellence.

About SimpliSafe At SimpliSafe, we are a cutting-edge home security company dedicated to safeguarding the lives you've built. Our mission to keep Every Home Secure drives us, and we are equally committed to nurturing your career path. We foster a culture of collaboration and innovation, free from ego, where individuals eager for their next challenge can discover significant opportunities and make a meaningful impact on the lives of those we protect. We aim for you to not only work here but also grow and thrive. We embrace a hybrid work model, allowing our teams to balance their time between the office and home. Typically, we convene in our state-of-the-art office on two core days—usually Tuesday, Wednesday, or Thursday—collaborating in person while enjoying flexibility for the remainder of the week. This approach enables us to harness the best of both worlds to accomplish our work effectively.

The Machine Learning Observability team at Datadog is at the forefront of developing innovative tools designed to monitor, interpret, and enhance AI systems deployed in production environments, with a special focus on Large Language Models (LLMs) and generative AI technologies. Our solutions provide comprehensive and scalable observability for AI workloads, including drift detection, model evaluation, and behavior tracing, empowering our clients to deploy AI confidently. As a Staff Software Engineer, you will be instrumental in driving the development of new features and core capabilities within Datadog’s LLM Observability product. You will influence product strategy, lead experimental initiatives, and leverage your extensive knowledge of AI systems and software engineering to tackle complex challenges in the rapidly evolving AI domain. Your contributions will have a significant impact on how our customers monitor, diagnose, and optimize LLM-powered applications in production. Join us in creating the essential tools that ensure AI systems are observable, comprehensible, and dependable in real-world applications. At Datadog, we value our office culture which fosters relationships, collaboration, and creativity. We operate within a hybrid work model to enable our Datadogs to achieve a work-life balance that suits them best.

Anduril Industries stands at the forefront of defense technology, dedicated to revolutionizing military capabilities for the United States and its allies through cutting-edge innovation. Our mission is to integrate the expertise, technology, and business models of the most pioneering enterprises into the defense sector, fundamentally transforming the design, construction, and commercialization of military systems. Our suite of solutions is driven by Lattice OS, an AI-enhanced operating system that consolidates thousands of data streams into a dynamic, 3D command and control environment. As we navigate the complexities of global strategic competition, Anduril is devoted to delivering state-of-the-art autonomy, artificial intelligence, computer vision, sensor fusion, and networking technologies to military operations in a matter of months, not years.ABOUT THE TEAMThe Developer Platform team is the foundation of Anduril’s engineering ecosystem, creating essential infrastructure that empowers teams to deploy mission-critical defense systems effectively. In this role, you will refine release pipelines and CI/CD workflows that power Anduril's Software Factories across the U.S., Australia, and the UK. You will also develop productivity-enhancing tools, including our Golang-based dx CLI, while architecting data infrastructure to derive actionable engineering metrics and KPIs. Your contributions will significantly enhance productivity throughout our software engineering landscape, establishing a scalable foundation that aligns with Anduril’s growth and its mission to tackle pivotal defense challenges through advanced technology.

Anduril Industries is at the forefront of defense technology, dedicated to enhancing the capabilities of U.S. and allied military forces through innovative advancements. Our mission is to integrate the cutting-edge expertise and technologies from the most progressive companies of the 21st century into the defense sector, revolutionizing how military systems are conceived, constructed, and marketed. Our systems are powered by Lattice OS, an AI-driven operating system that transforms numerous data streams into a real-time, 3D command and control interface. As we navigate an era of strategic competition, Anduril is devoted to delivering state-of-the-art autonomy, artificial intelligence, computer vision, sensor fusion, and networking technologies to the military in a matter of months rather than years.About the TeamThe Maritime Division at Anduril has curated a skilled team of professionals specializing in software development, robotics, artificial intelligence, sensor fusion, and data analytics to develop pioneering software and hardware solutions that significantly enhance our clients' operational capabilities. We are launching the next generation of autonomous systems to meet the demanding requirements of maritime operations. Our unique underwater vessel platform is designed for ultra-long-range, full-ocean-depth capabilities, complemented by a versatile maritime vehicle and manufacturing architecture that can scale from "small" to "extra-large" vehicle sizes. Currently, Anduril is executing billion-dollar contracts while simultaneously managing Robot-as-a-Service (RaaS) autonomous underwater vehicle (AUV) operations. We are committed to building upon our initial successes with substantial investments in an expanded product portfolio. Our offerings, including Dive-XL, Dive-LD, Copperhead, Seabed Sentry, and a host of other forthcoming systems, will create a cohesive system-of-systems for executing a variety of autonomous missions in maritime environments. If you are driven by the desire to tackle impactful challenges and work on systems that contribute to national strategic goals, we invite you to join Anduril’s Maritime Division and help shape the future of defense capabilities.

Join Anduril Industries as a Staff Software Engineer specializing in our Flight Management System. In this role, you will lead key technical initiatives, develop cutting-edge software solutions, and collaborate with cross-functional teams to enhance our drone technology. Your expertise will be critical in optimizing flight operations and ensuring the reliability of our systems in real-world applications.

Join CGS Federal as a Senior Billing Supervisor and play a pivotal role in our mission. This full-time, mid-level position is integral to our Financial Department, overseeing the e-billing and payment cycle workflow. Your responsibilities will include managing payment posting, charge corrections, monthly reconciliation of payments to bank deposits, and various other assigned tasks.At CGS, we unite motivated, skilled, and innovative professionals to tackle the government’s most pressing challenges with advanced technology. We seek candidates who are passionate about contributing to government innovation, thrive in collaborative environments, and can anticipate the needs of our team. We pride ourselves on fostering a supportive atmosphere that encourages professional growth and offers numerous learning opportunities.

At Later, we revolutionize influencer marketing through our state-of-the-art platform, empowering brands to create unforgettable campaigns with confidence. By leveraging genuine creator partnerships, reliable data insights, and expert guidance, we eliminate uncertainty from one of marketing's most significant investments.Our platform is bolstered by a decade of proprietary data, encompassing billions of social interactions and over $2.4 billion in verified influencer-driven purchases. This allows teams to gauge campaign effectiveness even before launching.With a focus on insightful analysis and strategic support, Later helps brands select the right creators, manage comprehensive campaigns, and achieve substantial growth in awareness, engagement, and revenue. Trusted by industry leaders such as Nike, Wayfair, Unilever, and Southwest Airlines, we successfully blend creativity with performance, ensuring that campaigns not only look impressive but also yield tangible results. Discover more at later.com.About the Position:We are in search of a talented Staff Engineer with extensive experience in modern web development technologies. The ideal candidate is a proactive problem solver who thrives under pressure, takes ownership of their projects, and collaborates effectively with colleagues, including mentoring junior engineers.Your Role:Strategic ContributionsDesign and implement scalable, maintainable, and secure service architectures.Identify and spearhead opportunities for platform-wide enhancements, new service creation, and the mitigation of technical debt.Contribute to the long-term vision for the platform and help establish high engineering standards.Technical ExecutionDevelop backend services utilizing C# and other relevant technologies.

Be a Catalyst for Change at Axon.At Axon, we are dedicated to our mission of Protecting Life. Our team is composed of passionate explorers tackling the most pressing safety and justice challenges through our innovative ecosystem of devices and cloud-based software. Collaboration is at the heart of what we do; we engage with openness and empathy, valuing diverse perspectives from our customers, communities, and each other.Life at Axon is dynamic, rewarding, and impactful. Here, you will take charge and foster real change. Continuously evolve while contributing to a meaningful mission at a company where your contributions are valued.Your ImpactAs a Staff Full Stack Software Engineer, you will play a pivotal role in developing Axon Records, our cloud-based records management system designed to transform how law enforcement agencies manage and access data. This system enhances report writing and approval workflows through structured data entry, real-time collaboration, and intelligent automation. Our goal is to significantly reduce the time officers spend on administrative tasks, allowing them to focus more on serving their communities.You will bring your expertise in building large-scale software applications, with a strong inclination towards backend technologies while also being knowledgeable in frontend and mobile technologies. You are enthusiastic about nurturing and scaling cloud-based systems and the engineering teams that create them. Your innovative ideas will guide our architectural direction and help us expand our Records Management system to new heights.Join us in an exciting environment where your passion, experience, and analytical abilities will help shape new solutions for public safety and create a lasting positive impact on the world.