Senior Fullstack Software Engineer - Sponsored Listings

Role Overview StubHub Inc. is hiring a Senior Fullstack Software Engineer focused on Sponsored Listings. This position is based in New York, NY. What You Will Do Design, build, and improve fullstack applications that support Sponsored Listings on the StubHub platform. Work closely with teams across product, design, and engineering to deliver features that im…

About MosaicMosaic is an innovative, AI-driven deal modeling platform tailored for private markets, utilized by top-tier investors and advisors such as Warburg Pincus, CVC, New Mountain, and Evercore. Our platform automates and standardizes essential deal analyses—including LBOs and DCFs—enabling investment teams to accelerate their processes, minimize spreadsheet errors, and focus on strategic investment decisions.At Mosaic, we merge deterministic, rules-based calculations with advanced AI capabilities to produce replicable, audit-ready outputs, trusted by private equity, private credit, and investment banking teams across multi-million dollar transactions.We are dedicated to creating the AI-driven operating system for the world’s most sophisticated investors and their advisors. As we rapidly expand, we are seeking talented professionals across engineering, product, customer enablement, and go-to-market teams.This is an exceptional opportunity for those eager to influence the convergence of high finance and technology, shaping the future of the industry for years to come.Learn more about our journey:BloombergFinancial TimesNY PostAbout the RoleAs a Fullstack Engineer at Mosaic, you will create product experiences essential for investors and bankers engaged in high-stakes deal processes. Your responsibilities will span the entire technology stack—from developing sleek, user-friendly interfaces to building robust backend services that facilitate modeling, data ingestion, collaboration, and workflow automation.This position is designed for builders who crave real ownership. You will contribute to feature development from inception to deployment, closely collaborating with product and design teams, while helping to lay the technical groundwork for a platform relied upon in mission-critical situations. You will face challenging tasks such as structured financial computations, document ingestion, compliance, permissions management, real-time collaboration, and performance optimization at scale.

Supported by prominent investors from Silicon Valley, Peregrine Technologies provides innovative solutions for public safety organizations, state and local governments, federal agencies, and private-sector institutions to tackle societal challenges with remarkable speed and precision. Our AI-driven platform transforms disconnected data into actionable intelligence, allowing organizations to access critical information swiftly and make informed decisions that enhance outcomes at every interaction. Currently, Peregrine serves hundreds of clients across more than 30 states and two countries, positively impacting over 125 million individuals as we continue to grow our influence in the enterprise sector and expand our international reach.Our TeamIn our engineering team, we are firm believers that empathy leads to better solutions. Observing how users engage with our products is a fundamental aspect of our process and aids in achieving the best outcomes. Engineers will collaborate on-site with our team to grasp the diverse use cases that Peregrine addresses.We are seeking a Staff Software Engineer to join our core engineering teams. In this role, you will collaborate with design and product management to develop systems that are resilient, scalable, and user-focused. Our teams face various challenges, from enabling real-time user collaboration on dynamic maps to constructing high-capacity backend architectures for processing billions of data points.We cherish both ownership and teamwork—you will be entrusted with significant features while partnering closely with other engineers to ensure their successful completion. We believe that humility and empathy are vital for crafting suitable solutions; you will interact directly with our deployment team and users as we iterate to solve their challenges. Persistence and creativity are critical to actualizing our vision.RoleWe are in search of a Staff Software Engineer to join our expanding team, lead impactful projects, cultivate an inclusive team culture, and guide technical decision-making.This position is ideal for someone who excels in both personnel management and hands-on technical leadership. You will build a high-performing team, assist them in navigating complex technical challenges, and ensure their contributions align with our business objectives. The perfect candidate will balance mentorship with maintaining high standards in technical execution.Your work will have a significant impact, helping to support emergency responders during disasters and addressing intricate organized crime issues. We are developing innovative capabilities that empower...

Join Suno: Redefining Music CreationAt Suno, we are transforming the music technology landscape to unleash creativity, where your ideas harmonize into sound and your songs come alive. Our innovative platform is fueled by cutting-edge music creation models, making musical expression accessible to millions around the globe.Founded by passionate Harvard alumni just two years ago, Suno has rapidly ascended to a valuation of $2.45 billion, achieving $200 million in annual recurring revenue and securing $250 million in Series C funding in November 2025. With a dynamic team of 150 dedicated professionals across our offices in Venice Beach, Cambridge, and New York City, we are among the fastest-growing AI startups worldwide.Our iOS team has garnered over 100,000 reviews with a stellar 4.9 rating on the App Store, playing an integral role in shaping our products and driving our company's success.Position OverviewWe are seeking pioneering members to join our iOS team. In this role, you will collaborate closely with our founding team and take ownership of various technical and design decisions for Suno’s iOS application.Discover our musical tribute to this role here: https://suno.com/s/oEdmOtkZDLHCopSGKey ResponsibilitiesDesign and develop Suno’s iOS app for music creation, exploration, and listening experiences.Establish foundational abstractions and libraries for high-performance, interactive audio applications.Engage in design and product decisions across the application.Enhance the performance, aesthetics, and user experience of our products.Qualifications7+ years of experience in delivering production iOS applications.Proficient in Swift, utilizing SwiftUI and UIKit as needed.Experience in crafting fluid animations, adept at converting prototypes into robust implementations.A strong commitment to exceptional user experiences, with a focus on detail, rapid iteration, and diligence.A genuine passion for music—whether listening, exploring, or creating—is a significant advantage.Bachelor's degree or equivalent experience required.

Join VTS, a leading technology firm transforming the real estate industry, as a Staff Software Engineer in our Activate team. In this role, you'll leverage your extensive software engineering skills to design and implement innovative solutions that enhance our platform's capabilities.As a critical member of our team, you will collaborate with cross-functional teams, driving the development of scalable software that meets the evolving needs of our clients. Your contributions will be instrumental in shaping the future of our technology and the real estate market.

About UsAt Adaptive, we are pioneering the future of real estate and construction with our innovative AI-native ERP solutions. As a rapidly expanding vertical AI company based in New York City, we have successfully attracted over 600 customers and secured $26 million in funding from top-tier investors including Emergence, a16z, and several prominent angel investors from leading companies such as Brex, Ramp, and Shopify.Why Join Our Team?Empower Local CommunitiesWe support the small businesses that are transforming our neighborhoods—whether it’s your favorite local café, the new home on the block, or the accessory dwelling units that help address the housing crisis. Our customers are passionate, skilled individuals who breathe life into their communities through their craft.Be at the Forefront of InnovationJoin us in a collaborative environment where your contributions are valued. Our team, composed of experts in finance, technology, and construction, is dedicated to driving success in a vast market. With our vision and momentum, we’re excited to have you on board!Your RoleWe are thrilled to announce an opening for a Staff Software Engineer at Adaptive! Your technical acumen will play a pivotal role in steering our engineering initiatives and ensuring the delivery of top-notch software solutions.Reporting directly to the VP of Engineering, you will collaborate closely with a talented team of 15 engineers and product specialists, focusing on the architecture, development, and optimization of our cutting-edge products.Key ResponsibilitiesDrive the successful execution and delivery of product priorities in partnership with the product and design teams.Lead the architectural design and technical strategy of our software, ensuring it is scalable, efficient, and secure.Align technical solutions with our business objectives and product vision.Facilitate technical discussions and decision-making processes in line with company goals and technology strategy.Mentor and nurture a team of engineers, instilling a culture of technical excellence and continuous improvement.

At Confido, we are revolutionizing the AI infrastructure that drives Consumer Packaged Goods (CPG) brands from analysis to execution. Our integrated platform streamlines cash applications, deductions, disputes, trade promotion management, forecasting, demand planning, and analytics, delivering significant time savings and enabling more intelligent financial decisions for our clients.We proudly support over 200 brands managing more than $20 billion in revenue, partnering with notable names such as OLIPOP, Simple Mills, and Dr. Squatch. With a recent $15 million Series A funding round led by Footwork Ventures and Y Combinator, we are poised for rapid growth and innovation.As a Staff Software Engineer, you will be instrumental in architecting and developing the core systems that drive the Confido platform. You will spearhead significant product and infrastructure projects, from AI-driven document processing to extensive financial analytics systems.This role offers a unique opportunity to merge technical excellence with impactful product development, collaborating closely with engineering, product teams, and clients to transform intricate operational workflows into scalable software solutions.Location: New York, NY (Relocation assistance available)

Note: This position is open only to U.S. citizens. All work must be performed within the continental United States. Raft develops a real-time data platform for the Department of Defense, supporting operators with rapid, informed responses during critical situations. The system ingests and enriches live data from over 750 sensors, providing a comprehensive operational view. Processing more than a billion events daily with millisecond latency, the team works with technologies such as Kafka, Kafka Streams, Pinot, Java, Scala, and Kubernetes. Role overview This Staff Software Engineer position focuses on designing, building, and managing clusters and applications throughout their lifecycle. The work involves both cloud and on-premises environments, with a strong emphasis on reliability and scalability. What you will do Design, develop, and oversee the full lifecycle of clusters and applications. Collaborate with clients to architect, build, and deploy Kubernetes or Docker solutions in cloud and on-premises settings. Create and maintain CI/CD pipelines to enhance software delivery processes. Implement GitOps practices to streamline deployment and operational workflows. Key technologies Kafka Kafka Streams Pinot Java Scala Kubernetes

Join our dynamic team at Axon as a Staff Software Engineer, where you'll play a pivotal role in developing cutting-edge software solutions that enhance public safety. You will collaborate with talented engineers and contribute to impactful projects that make a difference in the community.

About WRITERWRITER is the premier platform where top global enterprises harness the power of AI to transform work. Our mission is to amplify human abilities through cutting-edge superintelligence. We are demonstrating this capability by providing powerful, dependable AI solutions that bridge IT and business teams, driving enterprise-wide transformation. With WRITER's comprehensive platform, companies like Mars, Marriott, Uber, and Vanguard are developing AI agents that leverage their own data, empowered by WRITER's robust enterprise-grade large language models (LLMs). Currently valued at $1.9 billion and supported by leading investors such as Premji Invest, Radical Ventures, and ICONIQ Growth, WRITER is swiftly establishing itself as a frontrunner in the field of enterprise generative AI.Established in 2020, with hubs in San Francisco, New York City, Austin, Chicago, and London, our team is driven by ambitious goals and a rapid pace. We invite innovative and dedicated individuals to join us on our mission to redefine the future of work through AI. About the RoleWe are on the lookout for a talented fullstack Software Engineer to enhance our engineering team in creating advanced AI-driven agent systems capable of executing autonomous workflows and orchestrating multi-step tasks. In this position, you will be instrumental in designing, developing, and scaling next-generation AI agents that seamlessly integrate with enterprise data and services to address real-world challenges. Collaborating with cross-functional teams, you will convert complex agent concepts into production-ready software solutions.‍ What You'll DoDesign, implement, and maintain scalable and secure agent-driven services and systems that autonomously accomplish tasks using cutting-edge AI frameworks.Enhance and develop robust infrastructure and high-throughput APIs, emphasizing core agent functionalities like memory, communication channels, skills, intelligent decision logic, security, and workflow management.Integrate agent capabilities with backend services, data stores, vector databases, search/retrieval systems, and external APIs.Work closely with product managers, AI researchers, data engineers, and UX teams to translate high-level agent use cases into effective, production-ready software.Ensure the reliability, monitoring, and observability of all agent components (metrics, logging, CI/CD, fault tolerance).Participate in architectural design decisions and conduct thorough code reviews to maintain high standards of quality.

Probook stands at the forefront of innovation in the home services sector, revolutionizing the operational dynamics of plumbing, HVAC, and electrical businesses. Our cutting-edge AI dispatcher plays a critical role in ensuring that the right technician is dispatched to the right job, significantly impacting service costs and customer satisfaction.By streamlining proactive communication and offering 24/7 workflow automation, Probook guarantees a seamless customer experience, eliminating the necessity for constant manual staffing. We consolidate these functions into a single, scalable platform, empowering businesses to manage their entire dispatch operations efficiently.The OpportunityWe are seeking a Staff Software Engineer to lead the development of product experiences that will propel us from $10 million to over $100 million in annual recurring revenue (ARR). This is an opportunity to be at the helm of creating and launching new product capabilities that will drive our next phase of hypergrowth.In this role, you will not just optimize existing features; you will be responsible for defining and delivering the innovative product capabilities that will serve tens of thousands of users and facilitate hundreds of millions in transactions within the next year.You will take ownership of complete product surfaces from inception to production, setting technical and product quality benchmarks for our engineering organization, and collaborating closely with leadership to align business strategy with product delivery.Each feature you launch will have a direct impact on our ability to capture market share rapidly, with your efforts translating into real-time revenue growth validated by firsthand customer feedback during our onboarding process.What You'll DoProduct Ownership & DeliveryLead the entire product lifecycle from conception to production, covering backend systems, frontend interfaces, AI integrations, and more.Develop production-ready AI products that automate intricate workflows for thousands of service businesses.Deliver features with an agility that exceeds traditional timelines, achieving startup speed while maintaining high-quality standards.Make strategic product and technical decisions that balance user needs, business impact, and technical excellence.Lead multi-month initiatives that unlock significant product capabilities and revenue potential.Technical LeadershipDesign scalable systems and product architectures capable of accommodating 100 times our current usage.Set exemplary standards for product quality, technical craftsmanship, and user experience within the engineering department.

About Gusto Gusto supports over 400,000 small businesses nationwide by handling payroll, health insurance, 401(k) plans, and HR services. This work helps business owners focus on what matters most to them and their customers. With offices in Denver, San Francisco, and New York, Gusto aims to build a workplace that reflects the diversity of the communities it serves. Full-time employees receive competitive salaries, a comprehensive benefits package, and equity in the form of RSUs. Compensation varies by role, level, and location. Details about Gusto’s approach to rewards can be found on their Total Rewards philosophy page. AI plays a key role in daily operations at Gusto. Team members are expected to use AI tools relevant to their work and continue building their skills as technology evolves. The level of AI experience required depends on the position and will be assessed during the interview process. Role Overview: Staff Software Engineer – Payments & Risk Gusto is hiring experienced full-stack engineers for teams working on payments and risk platforms. These systems serve small business owners every day. Staff Software Engineers in this group work across the full lifecycle of payments or risk systems: shaping architecture early in design, building internal features and APIs, and maintaining performance after launch. The work includes engineering the core business engine, providing reliable backend services for product teams, and setting a high standard for engineering practices. Team Focus Areas Payments: The Payments team manages all financial transaction operations for Gusto’s products. This includes ensuring secure fund transfers among partners, employers, employees, and government agencies. Engineers on this team build new payment features for both U.S. and international markets and help redesign the payments platform to support future growth. Risk: The Risk team develops systems that protect Gusto and its clients from financial risks. This work shapes experiences that keep customers and the company safe. Location This role is based in San Francisco, CA (hybrid) or New York, NY (hybrid).

Whatnot is a marketplace designed for collectors, with an emphasis on community experience. The platform brings together people who are passionate about collecting, offering tools and features tailored to their needs. Role overview The Fullstack Engineer will join a skilled team in New York, NY. This role focuses on developing and enhancing features that help users get more from the Whatnot platform. The work includes building scalable applications and supporting the marketplace’s ongoing growth. Key responsibilities Create new features and refine existing ones to improve user experience. Build scalable software solutions that can grow with the community. Collaborate with team members to support the platform’s development. Location This position is based in New York, NY.

At Peregrine Technologies, we are backed by prominent Silicon Valley investors and are committed to aiding public safety organizations, state and local governments, federal agencies, and private-sector institutions in meeting society's challenges with remarkable speed and precision. Our cutting-edge AI-enabled platform converts fragmented and isolated data into actionable operational intelligence, providing immediate access to crucial information that empowers swift and informed decision-making, enhancing outcomes across all interactions. Presently, Peregrine serves hundreds of clients across over 30 states and two countries, benefiting more than 125 million people, and we are on a mission to expand our impact globally.TeamWe believe that empathy is essential in crafting superior solutions. Understanding how users interact with our products is a priority, allowing us to arrive at the best answers effectively. Engineers will closely collaborate with our onsite team to comprehend the diverse use cases that Peregrine addresses.We are actively seeking a Data Governance Engineer to join our dynamic engineering teams, tackling a variety of challenges, from facilitating real-time user collaboration on intricate maps to constructing high-scale backend architectures capable of processing billions of data points.The Data Governance team is responsible for developing services, systems, and product features that enable our customers to manage their data assets throughout their lifecycle within the Peregrine platform. We ensure robust, secure data access and comprehensive audit capabilities.RoleAs a Software Engineer on our expanding team, you will enjoy significant ownership over our technology stack. You will play an integral role in designing and constructing the next iteration of our core access control and governance systems, which manage access to over 7 billion data points within Peregrine's multi-tenant data platform. Your work will involve implementing fine-grained permissions, audit functionality, policy enforcement, metadata management, data labeling, and compliance across the platform.You will collaborate closely with Product Managers to guide projects from conceptualization to design and execution. Your design and development of data governance features will involve making thoughtful trade-offs to achieve an optimal balance between security and user experience.Our technology stack is continually evolving, built on a robust backend foundation comprising Python, Django, Celery, Airflow, and Kafka, with a frontend developed using React, Redux, and Mapbox. We utilize data stores including PostgreSQL and Elasticsearch, and host machine learning models on Bedrock and Sagemaker, while leveraging AWS, Pulumi, Terraform, and Kubernetes as our foundational infrastructure.

Join Brigit, a pioneering company dedicated to enhancing the financial well-being of everyday Americans. We design transparent, equitable, and user-friendly financial products, empowering our members to manage their finances effectively, avoid unnecessary fees, and rapidly improve their credit scores. If you value autonomy, ownership, and the opportunity to make a meaningful impact within a thriving organization, we invite you to become part of our dynamic team!At Brigit, we are making waves in the financial sector, and our achievements have not gone unnoticed:Built In's 2026 Best Midsize Companies to Work For in New York CityBuilt In's 2025 Best Places to Work For In New York CityBuilt In’s 2024 & 2025 Best Startups to Work For In the U.S.Built In’s 2023 - 2025 Best Startups to Work For In New York CityFast Company’s Most Innovative Companies of 2022Business Insider’s Most Promising Consumer Startups 2022Forbes Fintech 50 2022Position Overview:We are seeking experienced fullstack engineers to join our mission of scaling our innovative consumer finance platform to millions of users within the next year. With our success in supporting low-income Americans in achieving financial stability, now is the time to expand our reach. Our technology stack includes React and React Native for our mobile and web applications, and we are looking for individuals who are passionate about building impactful solutions.

Join Match Group as a Staff Software Engineer, specializing in iOS development. In this pivotal role, you will be responsible for designing, developing, and maintaining high-quality applications that enhance our users' experiences across our platforms. Your expertise in iOS frameworks and languages will be crucial as you collaborate with cross-functional teams to deliver innovative solutions.

Supported by prominent Silicon Valley investors, Peregrine Technologies empowers public safety organizations, local and state governments, federal agencies, and private sector entities to confront societal challenges with remarkable speed and precision. Our AI-driven platform transforms fragmented data into actionable insights, delivering vital information that enhances decision-making processes, ultimately improving outcomes at every interaction. Currently, Peregrine serves hundreds of clients across over 30 states and two countries, impacting more than 125 million people, and we are poised for further expansion into enterprise markets and international territories.Our TeamWe believe that empathy is key to refining our solutions. Understanding how users interact with our products is crucial to our development process. As an engineer, you will have the chance to collaborate closely with our onsite team to explore the diverse use cases that Peregrine addresses.We are in search of a skilled security engineer to join our core engineering teams. You will face various challenges, from enabling real-time user interactions on detailed maps to architecting scalable backend systems that can process billions of data points.We hold that humility and empathy are essential in crafting effective solutions. You will work alongside our deployment team and users to iteratively resolve their challenges. Creativity and resilience will be vital to realizing our vision.RoleWe seek a software engineer who will take significant ownership across our tech stacks, making impactful decisions with long-term implications. You will play a pivotal role in integrating security into every phase of our product lifecycle.Our technology stack is continually evolving, anchored by a backend foundation utilizing Python, Django, Celery, Airflow, and Kafka; a frontend developed with React, Redux, and Mapbox; data storage solutions like PostgreSQL and Elasticsearch; machine learning models hosted on Bedrock and Sagemaker; and infrastructure that includes AWS, Pulumi, Terraform, and Kubernetes.About YouDevelop scalable frameworks that prioritize security, forming the backbone of our infrastructure and ensuring top-tier data protection.Identify and mitigate emerging security threats while crafting strategies that align with our product goals.Define security architecture across the platform...

Role overview Zocdoc, Inc. seeks a Staff Software Engineer specializing in Billing Solutions, based in New York, NY. The focus is on enhancing billing systems and improving how users interact with these tools. This work directly supports Zocdoc’s mission to simplify access to healthcare. What you will do Collaborate with engineering, product, and design teams to plan and deliver software that streamlines billing processes Design, develop, and maintain features that increase billing efficiency and reliability Contribute to the technical direction of billing solutions by sharing knowledge and guiding best practices

Join Ridgeline as a Staff Software Engineer specializing in Electronic Trading, where your expertise will shape the future of trading technology. You will be responsible for designing and developing innovative software solutions that enhance our trading platform's efficiency and reliability. Collaborate with cross-functional teams to implement technological advancements and ensure the highest standards of performance and security.

Join CoreWeave as a Staff Software Engineer focused on enhancing developer experience. In this role, you will craft innovative tools and solutions that streamline the development processes and improve the efficiency of our engineering teams. Your expertise will be vital in creating a collaborative environment where developers can thrive.