Staff SDK Engineer (React/React Native) at Privy | New York City

Join Partiful in Revolutionizing Social Connections!At Partiful, our mission is to foster friendships through unforgettable social events. We believe that gatherings, whether parties or other events, are the most effective way to meet new people and forge lasting connections. Our platform simplifies event planning, allowing hosts to create stunning party pages that facilitate seamless communication with guests. Download our app today and experience the magic!We are dedicated to innovating the event planning process, enhancing real-world connections, and bridging the gap between friends and acquaintances. Our ultimate vision is to transform every in-person experience into a cherished memory, eliminating barriers to bringing your social plans to life. Discover more about our impactful mission in The Washington Post, The New York Times, The Wall Street Journal, The Atlantic, Wirecutter, and USA Today. Partiful has been recognized as Google’s Best App of 2024, a Finalist for Apple’s App Store Awards, and has received the title of App of the Day from Apple multiple times. In 2025, we proudly earned a spot among TIME's 100 Most Influential Companies.

We are seeking a talented and experienced Lead/Senior React Native Engineer to join our innovative team at Pelago. In this role, you will be responsible for designing and implementing high-quality mobile applications using React Native. You will lead a team of developers and collaborate with cross-functional teams to deliver seamless user experiences.Your expertise will contribute to the architectural decisions and best practices that drive our mobile strategy. If you are passionate about technology and eager to make an impact, we want to hear from you!

Senior Staff React Native EngineerLocation: New York City (Office)On-site | Full-timeCompensation: CompetitiveJoin a leading-edge technology development firm that is at the forefront of creating and sustaining the foundational infrastructure for the world’s most dynamic digital asset launchpads. This organization operates within an ultra-low latency, high throughput environment, characterized by continuous high-concurrency loads. Here, technical precision is critical, and the impact of every deployment is felt instantly.We are on the lookout for a seasoned React Native Engineer to be a crucial part of our mobile engineering team. This role will be instrumental in developing and scaling a high-performance mobile application designed to empower a global audience with the advantages of decentralized finance (DeFi) and SocialFi. You will work across the entire stack to design exceptional mobile experiences, delivering features rapidly, and iterating efficiently in a high-growth ecosystem.Key ResponsibilitiesApplication Development: Create and manage a top-tier mobile application using React Native, focusing on high-performance execution and an intuitive user interface.Performance Optimization: Enhance mobile architecture for speed, efficiency, and scalability, effectively bridging complex blockchain interactions with mobile-first design principles.System Integration: Partner with backend engineers to integrate advanced APIs, real-time data streams, and decentralized technologies.Rapid Iteration: Implement fast-paced shipping cycles, gathering user feedback to refine the mobile experience and foster long-term engagement.Technical Problem Solving: Tackle intricate challenges related to non-custodial crypto wallets, smart contract interactions, and real-time on-chain data updates.Code Excellence: Uphold a clean, modular, and scalable codebase while pushing the boundaries of modern mobile development.Strategic Collaboration: Collaborate with designers, engineers, and product leaders to define the roadmap and future of the mobile platform.Work EnvironmentIn-Person Collaboration: This position requires in-person presence at the client's office.Intensity: Candidates should be comfortable with unconventional hours and a high-velocity pace where expectations are elevated and impact is immediate.Interview ProcessRecruiter / HR Call: Initial screening to discuss professional background and cultural fit....

About RillaAt Rilla, we are pioneering the future of conversation intelligence software for offline commerce. Our platform is designed to record, analyze, and index conversations, providing unmatched insights that empower the physical businesses that form the backbone of our economy.Our mission is to democratize cutting-edge technology, making the innovations of the 21st century accessible to all sectors of the economy. As a testament to our success, we are among the fastest-growing companies in history, achieving a remarkable trajectory that includes $40M in revenue within just 3.5 years, a consistent 15% month-over-month growth, and a net revenue retention rate exceeding 170%. Our customer satisfaction score (NPS) even surpasses that of the iPhone!Your RoleAs our first dedicated mobile engineer, you will play a pivotal role in enhancing our mobile codebase, enabling us to deliver exceptional, real-time experiences for field users. You’ll take ownership of our mobile architecture, streamlining today’s velocity bottlenecks and building end-to-end workflows that address real-world challenges on a large scale.Are you passionate about technology? Do you dream of leading innovations that apply AI in impactful ways? Join us at Rilla, where you will collaborate with an extraordinary team and develop your skills to the fullest.Technologies We LeverageProgramming languages and frameworks such as React, React Native, TypeScript, and Python.Open-source tools including Node.js, PostgreSQL, Turborepo, Lodash, and Zod.Industry-standard build tools, including GitHub Actions, Terraform, and Spacelift.Our Core ValuesContinuous Learning: We seek individuals who are fiercely curious and committed to personal growth.Customer Obsession: We prioritize genuine solutions that address customer pain points over superficial metrics.Winning Mindset: We thrive on accountability, team learning, and rapid feedback.Empathy: Understanding our customers' real-world challenges is key to effective solutions.Fearlessness: We embrace risks and view failures as learning opportunities.

About MILEMILE is an exclusive shopping destination that is transforming the luxury retail landscape. We provide our members with access to a carefully curated, timeless collection of the most coveted products from prestigious fashion brands, all available at unparalleled prices. Positioned at the crossroads of technology and fashion, MILE ensures a seamless and elevated shopping experience for consumers and brands alike. Our mission is to establish ourselves as the premier digital hub for luxury, where exclusivity, value, and exceptional design come together.What We’re Looking ForWe are seeking a Senior React Native Engineer to join our expanding engineering team. In this critical position, you will help shape our customer-facing interfaces on both our mobile application (React Native) and web platforms (React), including dashboards and our marketplace UI. This is a high-impact opportunity for individuals who excel in dynamic, product-oriented environments and aspire to contribute to building a brand that defines the industry.What You’ll Do Collaborate closely with front-end, product, design, and backend teams to create high-quality features across mobile and web platforms. Influence our front-end architecture and best practices to ensure scalability, maintainability, and an exceptional user experience. Execute pixel-perfect designs with a focus on interaction, motion, and accessibility. Enhance app and web performance, reliability, and compatibility across devices. Guide UI/UX decisions with a meticulous eye for detail, contributing to MILE’s luxurious brand identity. Participate in the development and evolution of our Tamagui-powered design system across platforms. Mentor junior engineers and contribute to fostering a culture of technical excellence and innovation. Keep abreast of the latest front-end trends and technologies to continually push the envelope of what’s possible. Who You Are 5+ years of professional experience in developing complex front-end applications in production environments. Extensive expertise in React and React Native, along with a solid understanding of their ecosystems and performance nuances. Proficient in modern JavaScript/TypeScript, state management (e.g., Redux, Zustand), and component-driven architecture. Demonstrated experience in building high-performance React Native applications with best practices for image loading, react-query implementation, scroll view optimizations, and modal management. Deep understanding of React quirks, performance challenges, useEffect pitfalls, and the ability to create custom hooks. Experience in developing custom React Native bridge modules. Proven track record of delivering polished mobile applications and web experiences that meet high standards of design and usability. Familiarity with Tamagui, Ant Design, Tailwind, and Shadcn.

About Us:At Zealthy, we are on a mission to democratize high-quality healthcare, ensuring access for everyone, regardless of their location. We are in the process of creating the world’s largest and most trusted virtual healthcare platform, revolutionizing the delivery of care to make healthcare accessible to all.Founded by a visionary healthcare entrepreneur with a successful track record, including scaling a previous venture to a valuation of $5 billion, Zealthy is uniquely positioned for sustainable growth as we ambitiously pursue our vision. Our steadfast dedication to quality and accessibility is at the heart of everything we do.Our team is committed to making a difference for our patients. While our office culture operates Monday to Friday, often extending beyond standard hours, the true satisfaction comes from the significant impact we create together. Every team member plays a vital role in building something transformative. As a full-time member of our team, you won't just help shape the future of healthcare; you'll also benefit from our success through equity ownership, reflecting our belief that every contributor should be a literal and figurative owner of our mission.If you are not ready to fully commit to your role and contribute to the goal of building the largest and highest quality telemedicine company with in-person work four days a week, we encourage you to reconsider your application.Join us in redefining the future of healthcare.The Role:We are actively seeking a dedicated Mobile Engineer specializing in React Native. This is a full-time, on-site position based in New York, NY. If you are exploring remote or hybrid options, this role may not be the right fit for you.Your Responsibilities:As a React Native Software Engineer at Zealthy, you will join a dynamic team of five full-time engineers and work closely with the Founder/CEO and the Senior Medical Director.You will be tasked with rapidly developing our mobile application for both iOS and Android, using our mobile-friendly web app and initial design elements as a foundation.Your role will require in-person collaboration at our New York office, participating in daily standups, weekly sprint meetings (or a flexible Kanban process), and holding yourself accountable to a rigorous product development timeline.Being part of an early-stage startup means you may need to wear multiple hats, building the initial version of the mobile application with limited support from other engineers.As we grow, there will be opportunities for you to advance into a leadership role based on your performance and aspirations, fostering an ongoing dialogue with current leaders.

About SomethingsAt Somethings, we are pioneering the first social wellness platform designed specifically for teens. Our mission is to connect teens with mentors who understand and support them, facilitating meaningful relationships that promote growth and healing.With 25 million teens in the U.S. facing mental health challenges, each download of our app represents a potential lifeline. We strive to ensure that not only do these teens engage with our platform, but they also build connections with caring individuals who can guide them towards a healthier future.Backed by General Catalyst and leading investors in healthcare and consumer markets, we are experiencing rapid growth—having increased our user base by 1100% in 2025 and projecting to multiply our reach fivefold in 2026.If you are eager to contribute to a company that is poised to redefine mental health support for a generation, we invite you to join us.Role OverviewWe are seeking a Full Stack React Native Engineer to become part of our dedicated engineering team. In this role, you will play a vital part in developing the core product experiences that propel our mission forward.Your work will be characterized by high agency and a profound impact:You will actively influence the product features that help teens connect and improve their well-being.What You’ll DoYour responsibilities will extend beyond just building features; you will take complete ownership of critical projects aligned with our strategic objectives for 2026:1. Create Enriching Teen × Mentor ExperiencesDevelop engaging mobile experiences that evoke warmth, speed, and a human touch.Enhance the onboarding process and early engagement to optimize the initial user journey.Design user interfaces that are as intuitive and addictive as leading social applications.2. Develop Scalable Tools for Our Mentor NetworkBuild mentor-focused features that enhance consistency, efficiency, and connectivity.Create safety mechanisms that proactively identify risks and mitigate human error.Refine mentor workflows to ensure they feel empowered by our tools.3. Lead Full-Stack Product DevelopmentConstruct end-to-end features utilizing React Native, backend services, and APIs.Collaborate closely with design, product, growth, and clinical operations teams.Conduct user interviews with teens and mentors to gain deep insights into their needs.

About UsBaton Corporation is a pioneering technology firm responsible for developing and operating the comprehensive technology stack behind pump.fun, currently recognized as the largest memecoin launchpad in the industry. Our systems are designed for low latency and high throughput, operating under continuous load, demanding precision and expertise.Your RoleIn the capacity of Senior Staff React Native Engineer, you will be at the forefront of our mobile platform's technical evolution. Your role encompasses tackling our most challenging technical issues, guiding architectural decisions, and fostering growth among your fellow engineers, all while actively contributing to production code with remarkable efficiency.Demonstrate leadership through significant code contributions in critical areas of our mobile stack.Take ownership of complex technical projects, overseeing everything from architectural design to deployment.Define the technical vision for mobile architecture while remaining actively engaged in its implementation.Establish and refine best practices for performance, reliability, and security within a crypto-native environment.Focus on optimizing speed, efficiency, and scalability, effectively bridging blockchain interactions with mobile-first design.Collaborate closely with backend engineers to integrate APIs, real-time data streams, and decentralized technologies.Rapidly iterate—shipping features, collecting user feedback, and enhancing the mobile experience to boost engagement and user retention.Address intricate technical challenges associated with crypto wallets, smart contract interactions, and real-time data updates.Maintain a clean, modular, and scalable codebase while pushing the limits of mobile development.Work in partnership with designers, engineers, and product leaders to shape the future of our mobile platform.

About UsBaton Corporation is a leading development firm that designs and manages the comprehensive technology infrastructure for pump.fun, the foremost memecoin launchpad currently in operation. Our systems are engineered for low latency and high throughput, functioning efficiently under constant pressure, and require precision to avoid failure.Your RoleAs a Senior React Native Engineer on our dynamic mobile team, you will be instrumental in enhancing and expanding our mobile application, empowering users around the globe with the capabilities of crypto and SocialFi. You will engage with the entire technology stack to create high-performance mobile experiences, delivering features swiftly and iterating rapidly in a fast-paced growth environment.Develop and maintain a top-tier mobile application using React Native, ensuring exceptional performance and a user-friendly interface.Optimize for speed, efficiency, and scalability, bridging blockchain interactions with mobile-centric design.Collaborate closely with backend engineers to integrate APIs, real-time data streams, and decentralized technologies.Quickly iterate to ship features, collect user feedback, and refine the mobile experience to enhance engagement and retention.Tackle complex technical challenges involving crypto wallets, smart contract interactions, and real-time data updates.Maintain a clean, modular, and scalable codebase while pushing the limits of mobile development.Work in synergy with designers, engineers, and product leaders to shape the evolution of our mobile platform.

BitGo is the premier infrastructure provider of digital asset solutions, offering comprehensive services including custody, wallets, staking, trading, financing, and settlement from secure, regulated cold storage. Established in 2013, our mission has been to empower clients to securely navigate the digital asset landscape. With a worldwide presence and numerous Trust companies, BitGo caters to thousands of institutions, including leading brands, exchanges, and platforms, alongside millions of retail investors globally. As a cornerstone of the digital economy, BitGo processes a significant share of Bitcoin transactions and stands as the largest independent custodian and staking provider for digital assets worldwide. For further insights, visit www.bitgo.com.This position requires full-time presence at our New York office to foster team collaboration and drive innovative problem-solving.We are seeking a talented Mobile Software Engineer with extensive React Native expertise to join our dynamic team and contribute to the development of cross-platform mobile applications aimed at enhancing the BitGo customer experience.

About StubHub StubHub is dedicated to improving the global live event experience. The company helps attendees enjoy every step, from ticket search to event entry, and supports sellers ranging from individual fans to major promoters. StubHub’s platform aims to be the safest and most convenient ticket marketplace for millions of users worldwide. Role Overview The Mobile Foundations team, part of Consumer App Foundations (CAF), is hiring a Software Engineer II focused on React Native. This group builds and maintains the core React Native platform that powers StubHub’s consumer apps. Instead of delivering features directly to end users, Mobile Foundations engineers create shared architecture, cross-platform infrastructure, performance improvements, and developer tools. Their work enables product teams to move quickly while maintaining high quality. What You Will Do Develop and enhance the core React Native platform supporting StubHub’s mobile applications Work with cross-platform technologies and collaborate with native iOS and Android components as needed Build reusable systems and platform capabilities used by millions of users worldwide Focus on performance, scalability, and resilience of the mobile experience Support other engineers by improving developer velocity and owning foundational systems Who Thrives Here This position suits engineers who enjoy tackling foundational challenges, improving engineering workflows, and taking responsibility for systems that other developers rely on daily. Location New York, New York, United States

Join Our Innovative TeamArch is a rapidly growing Series B financial technology firm that revolutionizes the management of private investments. Our platform enhances accessibility, clarity, and the overall experience for investors across various asset classes.Private investments, including venture capital, hedge funds, and private equity, represent about 25% of the investment landscape. Traditionally, stakeholders such as investors, advisors, and banks rely on cumbersome spreadsheets and disorganized systems, leading to inefficiencies and errors. This is where Arch steps in.Arch offers a unified platform that delivers standardized data, documents, and insights, eliminating the hassle of navigating multiple portals. Our mission is to streamline the investment process, allowing our clients to make informed decisions that result in superior financial outcomes.With a vibrant team of over 200 professionals, we serve more than 400 clients, including some of the largest banks and financial institutions in the United States. As we continue to scale, we are eager to expand our team across all departments.About the PositionWe are on the lookout for a Infrastructure Engineering Manager who possesses a robust background in technology and a passion for infrastructure. The successful candidate will have extensive experience in developing well-architected Cloud-Native applications, playing a vital role in bolstering our expanding engineering team.Your Key Responsibilities:Design, implement, and maintain tools for Continuous Integration/Continuous Deployment (CI/CD) and agile engineering iterations.Develop and manage cloud-native software solutions with a focus on Infrastructure as Code (IaC), automation, and observability.Enhance developer tools to optimize engineering workflows.Collaborate with cross-functional teams to ensure alignment of infrastructure practices with FinOps and budgeting strategies.Qualifications:A minimum of 7 years of experience in infrastructure or systems engineering roles.Proven track record in managing highly reliable and scalable web applications; expertise in site reliability engineering is a must.Demonstrated ability to advocate for best practices in engineering.

Join mlabs as a Mobile App Engineer and be part of a groundbreaking initiative to reshape the future of finance through our next-generation mobile trading platform. This innovative platform goes beyond conventional retail applications, providing a comprehensive trading experience featuring live market data, complex order types, and multi-venue execution.As a Mobile Engineer, you will harness the capabilities of professional trading terminals, adapting them for mobile use. You will tackle sophisticated engineering challenges, including maintaining synchronized real-time price feeds and ensuring system performance remains robust during high market volatility. This role is perfect for a developer who thrives in high-bandwidth, in-person collaborative settings and is eager to build ambitious systems from the ground up.

BitGo delivers secure digital asset infrastructure for institutions and retail investors, offering custody, wallets, staking, trading, financing, and settlement services. The company manages multiple Trust companies and processes a large portion of Bitcoin network transactions. BitGo is known as a leading independent custodian and staking provider. More details are available at www.bitgo.com. Location This position is based full-time in the New York office. In-person collaboration and teamwork are central to this role. Role overview The Frontend and Mobile Software Engineer will focus on building and enhancing cross-platform mobile applications. The work centers on delivering a strong customer experience for BitGo users. Requirements Significant experience with React or React Native

About TitanTitan is an innovative and award-winning wealth management firm dedicated to revolutionizing the financial landscape for our generation. Our mission is to democratize access to wealth management services by providing everyone with a personal wealth advisor at their fingertips. Traditionally, such services have only been available to the ultra-wealthy, but with Titan, we are changing that narrative. Utilizing cutting-edge technologies like artificial intelligence, we empower our advisors to cater to clients who have long been underserved in this space. Supported by renowned investors such as a16z, General Catalyst, and Sam Altman, we proudly manage over $1 billion in assets for clients nationwide.Why Join Titan?Visionary Goals: Be part of a transformative vision that aims to elevate our generation's wealth.Timeliness: The rise of LLMs allows us to provide personalized wealth management solutions now more than ever, and we are driven by this urgency.Significant Impact: Join a small, dynamic team where your contributions will make a substantial difference.Collaborative Culture: Experience a vibrant in-person culture, working closely with our founders and team members.Competitive Compensation: Enjoy attractive cash compensation and above-market equity options, ensuring you are a true owner in our mission.Esteemed Backers: Work with a team supported by top-tier investors who share our ambitious vision.Role OverviewWe are seeking a talented Senior Full Stack Engineer to design and implement end-to-end features on both web and mobile platforms. You will collaborate with Product, Design, and Backend teams to deliver seamless user experiences across our React (web) and React Native (mobile) applications. The ideal candidate is passionate about tackling real user challenges through elegant design and exceptional engineering.

About the RoleAt Counsel Health, we have developed an innovative product that has garnered admiration from both patients and physicians, utilizing a fast-paced technology stack. As we continue to grow, the complexity between our application code and infrastructure is expanding. We are seeking a talented individual who thrives in this dynamic intersection.We are in search of a Backend Infrastructure Engineer who embodies both software engineering and infrastructure expertise. This role is not about working in isolation writing Terraform scripts all day or solely delivering product features in React. Instead, you will work within the essential layer that connects our CI/CD pipelines, Infrastructure as Code (IaC) for our AWS environment, backend services, and the developer tools that empower our rapidly expanding engineering team.Your ResponsibilitiesEnhance Our Infrastructure-as-Code: Design and manage our cloud infrastructure utilizing Terraform.Optimize CI/CD Processes: Take ownership of our build, test, and deployment pipelines from start to finish. Aim to make production deployments effortless, speedy, reliable, and automated.Backend Development: Create production-level backend services and contribute to our core server-side systems. You are proficient in writing application code, not just orchestrating it.Create Core Archetypes: Develop production-grade archetypes for new deployments, jobs, consumers, and workers. You are adept at building an abstract base stream consumer or cron executor for widespread application.Enhance Developer Experience: Act as the engineer who accelerates the productivity of other engineers. Streamline local development workflows, decrease build times, resolve flaky infrastructure issues, and create internal tools that the team genuinely values.Security & Compliance: Collaborate closely with our security and compliance team to strengthen our infrastructure security posture, including secrets management, IAM policies, network isolation, and audit logging in a HIPAA-compliant environment.Who You AreA Bridge Builder: You feel at home in an IDE crafting application code as well as in a terminal managing cloud infrastructure. You view backend and infrastructure as intertwined disciplines.An Automation Advocate: If a task is done manually more than twice, you are already scripting it for automation.A Systems Thinker: You comprehend how a request traverses through various systems and how they interact.

Position: Google App Engine ConsultantLocation: Available in New York City, Boston, San Francisco, San Diego, or AtlantaContract Duration: 6 to 12 monthsJob Overview: We are seeking an experienced Google App Engine Consultant to join our dynamic team. The ideal candidate will possess qualifications as a Google App Engine specialist or as a Google Qualified Cloud Platform Developer. While hands-on experience with Google App Engine is highly desirable, we are open to applicants who have substantial experience in Python on App Engine, though training on Java may be necessary as our client has designated Java as the primary language for App Engine development. Candidates should also have a strong understanding of RESTful web services and be well-versed in Agile Scrum methodologies.

Join arch.co as a Lead Infrastructure Engineer, where you will play a pivotal role in designing, implementing, and maintaining our cutting-edge infrastructure systems. Collaborate with cross-functional teams to ensure robust architecture and performance optimization, while mentoring junior engineers and providing technical leadership.

Join Duolingo as a Senior Android Engineer focused on enhancing our app builds! In this role, you will collaborate with cross-functional teams to design, develop, and implement innovative features for our Android applications. We are looking for an individual who is passionate about mobile technology and dedicated to delivering a great user experience.