Senior Frontend Developer (React) | Treehouse Strategy

Join our dynamic team as a Senior Frontend Developer specializing in React! We are seeking an experienced Frontend Engineer who is passionate about coding and thrives on tackling unique challenges within a collaborative environment. As a pivotal member of our compact frontend development team, you will play a crucial role in making technical decisions that s…

About ArtemisAt Artemis, we are at the forefront of a transformative shift where traditional finance is seamlessly integrating with digital finance. As a leader in this space, we are building an open data platform that consolidates and standardizes crucial metrics for blockchains, tokens, and stablecoins.Our solutions are trusted by industry giants such as Visa, Circle, Tether, Grayscale, and Franklin Templeton, and our mission is to empower individuals globally to become world-class investors in digital finance.Who We AreInspired by the resilience and determination of explorers like Ernest Shackleton, we are a dedicated team of professionals from diverse backgrounds including traditional finance and crypto. Our culture is founded on passion, mental fortitude, and the drive to tackle challenging problems. Join us if you're ready to make an impact!

About MercivMerciv is an innovative startup specializing in AI and data analytics, committed to revolutionizing the way businesses leverage strategic intelligence. Our goal is to empower organizations to effectively utilize data, derive actionable insights, and make informed strategic decisions through state-of-the-art AI pipelines and adaptive forecasting tools.Imagine a future where every business decision is backed by timely and relevant data, blending AI capabilities with human intuition. Our technology:Integrates varied data sources into a unified intelligence layerEnhances human decision-making through autonomous AI analysisReveals insights and opportunities overlooked by conventional toolsPredicts outcomes and assists teams in managing uncertainty with clarityEmpowers organizations to proactively shape their marketsWe are dedicated to creating solutions that are not only powerful and scalable but also remarkably intuitive, enabling teams across the organization to utilize them effectively, beyond just the data specialists. Having secured $14M in seed funding, we are building a robust team centered around a strong engineering culture and are set to launch publicly after nearly two years in stealth mode.About the TeamOur team is developing an agentic AI platform that is transforming how enterprises engage with data. Merciv seamlessly connects an organization’s entire data ecosystem with external data sources—such as social media trends, industry reports, and consumer behavior signals—to unveil insights and automate workflows that previously consumed analysts’ weeks.We prioritize making powerful tools feel accessible and simple. Each feature should be intuitive, and every component must be interactive. We aspire for users to open Merciv and feel instantly empowered to achieve more than before.Our nimble, agile team flourishes on innovation and independence. With a small enough team that every member takes genuine ownership, we utilize a Directly Responsible Individual (DRI) model—enabling you to own significant product features from inception to launch, rather than merely contributing to them. You will wear multiple hats, and that’s by design.Our work environment fosters creativity and cutting-edge technology, designed for those keen on shaping the future of human-AI collaboration. If you’re enthusiastic about joining a dynamic, innovative startup culture and making a substantial impact on client businesses, Merciv is your ideal workplace. Join us as we broaden the scope of retail intelligence and deliver unmatched value to our clients.

About GeminiFounded in 2014 by Cameron and Tyler Winklevoss, Gemini is a pioneering global platform in cryptocurrency and Web3, dedicated to delivering a suite of user-friendly, secure, and dependable crypto solutions for both individuals and institutions in over 70 countries. Our mission is to usher in a new era of financial, creative, and personal freedom by granting trusted access to the decentralized future. We envision a world where cryptocurrencies redefine the global financial landscape, enhancing choice, independence, and opportunity for all. By bridging traditional finance with the burgeoning cryptoeconomy, we aim to create a more open, equitable, and secure financial system. As a publicly traded company, Gemini is uniquely positioned to amplify this vision with expanded scale and influence.The Trading Systems DepartmentThe Role: Staff Software Engineer (Frontend)As a Staff Frontend Engineer at Gemini, you will collaborate with a dynamic cross-functional team of web, mobile, and backend engineers to tackle complex challenges that will shape the future of the digital asset ecosystem. Your contributions will directly enhance our customer experience, setting us apart as a leader in the industry and helping to build an unparalleled crypto exchange. If you are passionate about solving technical challenges that impact our customers and clients, we invite you to connect with us.This position requires in-person attendance at our New York City office twice a week.

About N1:N1 is an innovative leader in blockchain technology, providing a hyper-efficient and horizontally scalable network that facilitates trustless computing on an internet-wide scale.Our diverse team hails from esteemed institutions such as Harvard, Carnegie Mellon University, DFINITY, VMWare, and Galaxy Digital, and is supported by elite venture capital firms including Founders Fund, Kraken Ventures, SALT, and Amber Group.Position Overview:We are in search of a talented frontend engineer who has a keen eye for design and a passion for creating exceptional, high-performance user experiences across our digital platforms. As a crucial member of our agile team, you will contribute to the development of blockchain products, directly influencing user interaction with our cutting-edge technology. This opportunity is perfect for individuals who are resourceful, deeply invested in product development, and possess strong design instincts.

Senior Frontend Engineer$270K – $300K • meaningful equityAbout NovigAt Novig, we are revolutionizing the sports prediction market in America. Founded by visionaries Jacob Fortinsky and Kelechi Ukah, we proudly stand as the sole platform offering commission-free sports trading. By discarding the outdated sportsbook model, we provide users with superior pricing, complete transparency, and a more efficient market structure.With backing from top-tier Silicon Valley investors, including Pantera, Forerunner, Lux, NFX, Paul Graham, and Joe Montana, Novig has successfully raised over $100M to fuel our mission.Who We AreOur goal is clear: to dismantle a rigged system where the house consistently wins, and sports enthusiasts are left behind. At Novig, we are committed to building a fair, two-sided marketplace that democratizes sports betting, empowering users in the process.Your Role and What Makes It ExcitingYou will be responsible for crafting and enhancing client-side experiences for our web and mobile applications, utilizing React and React Native.Own and improve critical user interfaces that enhance usability, performance, and trust across the Novig marketplace.Collaborate with Product and Design teams to balance functionality and aesthetics, delivering intuitive and responsive user experiences.Identify and resolve cross-browser and cross-platform compatibility issues in both web and mobile environments.Engage in cross-functional collaboration, contributing to frontend architecture decisions and backend service integration.Launch impactful features that elevate user engagement and support our vision of becoming the leading sports marketplace.Utilize cutting-edge development tools and AI-driven workflows to enhance development speed and code quality.Bring your passion for sports, markets, and technology, along with a curiosity for solving complex computer science challenges.A Bachelor's or Master's degree in Computer Science or a related field is required.Minimum of 3 years of professional experience in building frontend applications.Proficient in TypeScript, React, and React Native; familiarity with Node.js and GraphQL is a plus.

At profound, we are dedicated to empowering companies in navigating and mastering their AI presence. As a Frontend Software Engineer, you will be instrumental in crafting high-performance, visually stunning applications using React that redefine AI-driven marketing experiences.Your ResponsibilitiesDesign and enhance sleek, high-quality user interfaces based on low-fidelity wireframes.Utilize advanced CSS techniques to create exceptional, pixel-perfect user experiences.Optimize front-end performance, ensuring fluid and seamless user interactions.Collaborate closely with design and engineering teams to bring innovative ideas to fruition with speed and precision.Contribute to the architecture and best practices of our product's front end.Your ProfileProficient in React, Next.js, and TypeScript, with a strong grasp of state management and performance tuning.Solid experience with Tailwind CSS, SASS, or SCSS, delivering refined, polished, and visually appealing user interfaces.Demonstrated ability to architect and scale complex Next.js applications, utilizing features such as App Router, SSR, SSG, and ISR.Familiarity with fetch management libraries like react-query or equivalent.Hands-on experience with CSS animations, transitions, and layout techniques to create captivating, interactive interfaces.A robust portfolio showcasing your high-quality front-end development projects.A strong eye for design, detail, and user experience, ensuring seamless interactions.Comfortable thriving in a dynamic, high-performance startup environment, quickly iterating on new ideas.Experience with GSAP for creating smooth animations and interactions.Familiarity with R3F, React Three Fiber, or Three.js for delivering immersive 3D experiences.Proven track record of leading large-scale migrations to Next.js, designing and implementing solutions that leverage its strengths.Deep understanding of caching mechanisms and CDN integrations to enhance performance and scalability for Next.js applications.Experience in implementing sophisticated internationalization and localization strategies for global audiences in Next.js projects.Practical experience working with React Software Engineering methodologies.

aescape seeks a Senior Frontend Engineer to join the team in the NYC/Metro area. The focus is on creating web applications and interfaces that are both practical and easy to use. Collaboration is central, with engineers and designers working side by side to deliver results that work for real users. Role overview Build and maintain frontend features for aescape’s web applications Partner with engineers and designers to develop user-friendly interfaces Share ideas and feedback to help improve the overall user experience Location This position is based in New York City or the surrounding metro area.

Senior Frontend EngineerLocation: New YorkOn-site | Full-timeCompensation: CompetitiveJoin our client, a leading technology development firm at the forefront of digital asset innovation. This organization is renowned for constructing and managing the essential infrastructure that powers the world's busiest digital asset launchpads. Their systems are designed for low latency, high throughput, and the capability to handle extensive concurrent loads. In this critical environment, technical precision is vital; the frontend systems must maintain resilience and performance amidst hundreds of thousands of active users.We are seeking a Senior Frontend Engineer to spearhead the design and evolution of large-scale frontend architecture. This role is hands-on and high-impact, concentrating on the development of fast, reliable, and maintainable user-facing systems. The selected candidate will be part of an elite team in a fast-paced environment where high expectations and immediate results are the norm.Key ResponsibilitiesSystem Architecture: Design and enhance large-scale frontend systems using React and Next.js, ensuring performance and scalability for a vast global audience.Performance & Reliability: Own the performance, reliability, and correctness across critical user flows, including rendering optimization, complex state management, and efficient data fetching.Pattern Design: Create frontend abstractions and architectural patterns that effectively scale with increasing product complexity.Boundary Definition: Collaborate with backend and Solana engineers to define efficient client-server interfaces and data synchronization strategies.End-to-End Leadership: Manage complex frontend projects from initial design to implementation, deployment, and iterative improvements.Quality & Standards: Uphold high standards for code quality, thorough testing, and operational readiness across the frontend codebase.Mentorship: Provide mentorship and support to other frontend engineers through design reviews, pairing, and direct technical guidance.Interview ProcessRecruiter / HR Call: Initial screening to discuss professional background and cultural fit.Technical Interview: In-depth assessment of frontend architecture, React internals, and performance optimization techniques.Final Interview: Comprehensive discussion focusing on strategic vision, leadership skills, and role expectations.

About UsAt Credal, we are dedicated to leveraging cutting-edge AI technology to empower those who are committed to creating a brighter future.We specialize in accelerating the intricate operations of prominent institutions while integrating security and governance throughout our products. Our esteemed clients include the U.S. Department of Health and Human Services, MongoDB, Comcast NBC Universal, Lattice, Wise (Transferwise), Checkr, and incident.io, among others.Having successfully secured over $10 million in funding, we boast a substantial runway. Join a team of Thoughtful Doers™ hailing from esteemed organizations such as Palantir, Cruise, Meta, Uber, and Google. Credal operates in-person from our spacious NYC office, with meals provided.About the RoleWe are in search of a founding Frontend & UX Engineer who will play a pivotal role in enhancing our product that has shown significant market demand from global enterprises.What You’ll Do:Take ownership of our Agent Builder Experience, enabling users of diverse technical backgrounds to leverage frontier intelligence.Contribute to architectural frameworks, design choices, and establish quality standards for our code and products.Collaborate directly with customers and our Go-To-Market (GTM) team to identify and tackle complex, cutting-edge challenges faced by our clients.Mentor junior engineers and continuously elevate our standards of engineering excellence.Assume full responsibility for our core products. While we currently utilize the following technologies, we prioritize effective solutions over rigid adherence to specific tools:Frontend: React, Typescript, NextJS, TailwindBackend: Typescript, Temporal, NextJS, Gel/PostgreSQLAbout YouYou may be an excellent candidate if you are a proficient frontend-focused senior engineer capable of transitioning into design and full-stack software development. A strong interest in Agentic AI and LLM applications is essential, even if you lack prior AI experience.You are enthusiastic about our mission to bring Frontier Intelligence to critical industries and institutions that serve human welfare, such as healthcare, government, and financial infrastructure.Coding is a natural extension of your being; you engage in it for enjoyment and excel at it professionally.You possess 4+ years of experience in software development and a proven track record of delivering impactful results.

Become a Catalyst for Positive Change at Axon.At Axon, our mission is to Protect Life. We are pioneers, addressing society’s most pressing safety and justice challenges with our innovative ecosystem of devices and cloud-based software. Our collaborative culture thrives on openness and respect, embracing diverse perspectives from our customers, communities, and one another.Working at Axon is dynamic, rewarding, and impactful. Here, you will take charge and create genuine change, continuously evolving while contributing to a mission that truly matters at a company that values your presence.About PreparedAs of October 1, 2025, Prepared proudly became a part of Axon—a significant achievement for our team and the broader public safety landscape. United by the mission to Protect Life, Axon and Prepared are leading a transformative era in AI-powered emergency communication. Together, we’re bridging the gap between the initial call for assistance and the resolution in the field—equipping responders with the clarity they need when every moment is critical.The 911 system is the backbone of public safety in the United States. However, the professionals answering these crucial calls have long been hampered by outdated technology. Prepared aims to rectify this. Since our inception in 2021, we have utilized advanced AI to optimize millions of emergency calls across 49 states, serving over 90 million individuals and revolutionizing the possibilities in crisis response.At Prepared, you’re not just joining a team; you’re shaping the future of emergency services and contributing to a safer, more interconnected world.Position OverviewWe are looking for passionate and experienced frontend engineers who excel in building resilient, responsive, and seamlessly integrated web and desktop platforms. This is a unique opportunity to join a small, agile engineering team (approximately 40 engineers) and make a significant impact while enjoying a high degree of autonomy and ownership.This is a hybrid role, requiring you to be in our Manhattan office four days a week.While traditional software in 911 centers can be cumbersome and outdated, we are committed to designing seamless and intuitive user experiences that empower our users in their essential daily tasks. This position plays a crucial role in developing scalable, reusable, and high-performance user interfaces. You will collaborate closely with design and engineering teams to create engaging user experiences while ensuring our codebase remains clean, maintainable, and efficient.

Join Uniswap Labs, a pioneering organization at the forefront of decentralized finance (DeFi), where we create user-friendly products that empower millions. From our innovative web app and wallet to essential crypto infrastructure such as the Uniswap Trading API and Unichain, our contributions to the Uniswap Protocol have facilitated over $2.9 trillion in transaction volume across Ethereum and more than 12 other chains.As part of our Apps Infra team, you will play a pivotal role in establishing the foundational infrastructure that supports all product teams at Uniswap. We manage the data layer, design systems, release and QA automation, UI libraries, and shared frontend services. Our approach is always user-centric, ensuring that the infrastructure we build enhances the overall user experience. Additionally, we actively support the development of AI-driven internal tools and automations that enable our engineering team to deliver faster and more efficiently.We are seeking a Senior Frontend Infrastructure Engineer who is passionate about technology and can seamlessly transition between high-stakes migrations, building AI-powered CLI tools, and refining UI components. You will have a strong viewpoint on tooling, prioritize developer experience, and uphold product quality as the core of your work.

Join Uniswap Labs, a vital contributor to the Uniswap Protocol, the world's largest decentralized exchange (DEX), facilitating over $4 trillion in trading volume across 17 different blockchains. We develop innovative products that empower millions to engage with the protocol, including the Uniswap Web App, Wallet, and Trading API. Additionally, we serve as the primary technical provider for Unichain, a DeFi-centric Ethereum Layer 2 designed to unify liquidity across multiple chains.By joining our team, you will be part of a transformative journey that is redefining how value is exchanged on the internet.We are seeking a passionate and proactive Senior Frontend Engineer to help us create the next wave of financial products. In this pivotal role, you will own our current suite of web products while also having the opportunity to shape and influence the design and development of future offerings. You will ensure a seamless and high-quality user experience across various interfaces, from trading platforms to data-centric analytics pages and documentation portals.Our headquarters is located in SoHo, New York City, and this position offers the flexibility to work partially or fully remotely.

Join Grow Therapy as a Senior Engineering Manager, leading our Frontend Platform team. In this pivotal role, you will guide the development and optimization of our user-facing applications, ensuring they are efficient, scalable, and user-friendly. You will collaborate with cross-functional teams, mentor engineers, and drive architectural decisions to enhance our platform's capabilities.

About TruelogicTruelogic is a premier provider of nearshore staff augmentation services, based in New York. With over 20 years of experience, we have successfully delivered exceptional technology solutions to a diverse array of clients, from cutting-edge startups to established industry leaders, empowering them to realize their digital transformation ambitions.Our dedicated team of over 600 skilled technology professionals drives digital innovation by collaborating with U.S. companies on their most significant projects. Whether working alongside Fortune 500 corporations or scaling startups, we focus on delivering impactful results.By applying for this role, you will take the first step toward joining a vibrant team that values your expertise and career aspirations. We strive to align your talents with opportunities that promote outstanding career growth and success while contributing to projects that are shaping the future.Our ClientOur client is revolutionizing the hotel guest experience by providing day access to luxury hotel amenities, such as stunning pools, private beaches, and luxurious spas, allowing locals to indulge without leaving the city. If you are inspired to contribute to this vision, we would love your assistance.Our expanding team of tech and hospitality innovators has partnered with over 1,500 top hotels and resorts.Job SummaryWe are seeking a skilled Frontend Engineer to join our Hotels team, which is dedicated to ensuring the success of our resort partners in the marketplace by equipping them with effective management tools for their offerings. This team also develops products that enhance the guest experience upon arrival at the property. You will collaborate closely with cross-functional partners in Product, Design, and Data to create high-performing products that delight our customers and resort partners, exceeding both site metrics and business KPIs.The ideal candidate should be located in or around the NYC area, as this position requires in-person attendance at our NYC headquarters four days a week.

About HyphaHypha is an innovative AI-driven platform that is revolutionizing asset management throughout its entire lifecycle—covering acquisition, management, and exit strategies. With a specialized focus on healthcare facilities and multifamily real estate, we are transforming the industry through three fundamental pillars:Observability: Delivering real-time insights into asset performance, deal progression, and market dynamics for all stakeholders involved.Intelligence: Facilitating AI-enhanced optimization across multiple dimensions, including risk assessments, tax strategies, and performance benchmarking.Orchestration: Establishing seamless workflows and a unified source of truth to eradicate inefficiencies.Role OverviewIn the capacity of a Senior / Staff Frontend Engineer at Hypha, you will take ownership of the user experience layer of our platform. You will create interfaces that allow users to navigate through intricate financial data, AI-extracted entities, document viewers, dashboards, and conversational search functionalities. Collaborating closely with product and design teams, you will convert intricate workflows into interfaces that are intuitive, swift, and user-friendly.This position emphasizes both the art of frontend development and the architecture behind it. You will lead the charge in developing high-quality user interfaces, influence interaction patterns across our platform, and make critical decisions regarding component architecture, performance, state management, and frontend scalability. Your objective is to simplify complex data and AI-driven workflows while defining standards and systems that maintain frontend speed, cohesiveness, and maintainability as Hypha continues to grow.This opportunity is tailored for senior and staff-level frontend engineers with extensive experience in crafting polished, high-performance product experiences and shaping frontend architecture in a production environment. Compensation will be commensurate with experience, technical expertise, and scope of responsibility.

Join Virtu FinancialAs a pioneering leader in financial technology, Virtu Financial harnesses state-of-the-art technology to provide liquidity to global markets. We pride ourselves on delivering innovative and transparent trading solutions, along with industry-leading analytics tools to our clients. As a market maker, Virtu plays a pivotal role in enhancing market efficiency by offering deep liquidity across more than 19,000 securities at over 235 venues in 36 countries worldwide.We foster a dynamic, meritocratic environment characterized by a flat organizational structure. A background in finance is not required, making this an excellent opportunity for aspiring professionals eager to embark on a career in financial technology.YOUR ROLEWe are seeking a talented Software Engineer specializing in C# to join our Triton Development team. Our mission is to build a cutting-edge, multi-asset class Execution Management System that is revolutionizing the investment processes of the world’s largest hedge funds and institutional investors. The Triton Execution Management System is a global, broker-neutral platform that integrates Virtu’s innovative liquidity, execution, analytics, and workflow solutions into a cohesive and customizable interface.The Triton Development team is composed of highly skilled software engineers who are passionate about delivering exceptional software. In this highly visible role, you will:Enhance the scalability and performance of C# software components and user experiences through Agile methodologies.Contribute by assessing and recommending new technologies and optimal designs for next-generation features.Collaborate effectively with team members across various departments.Manage multiple concurrent projects while swiftly adapting to changing priorities.

About Confido Confido builds AI-powered infrastructure for Consumer Packaged Goods (CPG) brands, helping them manage everything from deduction resolution to production planning. The platform brings together cash application, deductions, disputes, trade promotion management, forecasting, demand planning, and analytics in one place. This integration saves clients time and supports better business decisions. Over 200 brands, including OLIPOP, Simple Mills, Dr. Squatch, and Tropicana, use Confido to manage more than $20 billion in revenue. Backed by $15 million in Series A funding from Footwork Ventures and Y Combinator, the company is positioned for rapid growth. Role Overview The Senior Frontend Engineer will lead the design and development of the user-facing side of Confido’s platform. The focus is on building intuitive, high-performance interfaces that make complex financial workflows easier for users. What You Will Do Design and develop frontend features for the Confido platform Create interfaces that simplify complex operational and financial data Collaborate with engineering and design teams Work with customers to turn detailed requirements into seamless product experiences Location This role is based in the New York City office.

About AirOpsAirOps is pioneering the first comprehensive content engineering platform tailored for the AI-driven era. As the landscape of discovery transitions from conventional search methods to innovative AI platforms, we empower brands to enhance their visibility and maintain their relevance in the digital space. Our company is currently experiencing remarkable growth, having quintupled our revenue in the past year by assisting marketing teams at esteemed companies like Ramp, Chime, Carta, and Rippling in transforming content quality into a sustainable competitive edge.Our platform equips marketers to adeptly navigate the evolving discovery landscape, prioritize impactful opportunities, and generate precise, on-brand content that garners citations from AI systems and builds trust with human audiences. Supported by notable investors such as Greylock, Unusual Ventures, Wing VC, and Founder Collective, we are on a mission to create intelligent systems that will empower the next generation of marketing leaders. AirOps is headquartered in San Francisco, New York, and Montevideo.About the RoleAs a Senior Frontend Engineer at AirOps, you will be instrumental in developing and enhancing our software products, with a strong emphasis on creating exceptional user interfaces that boost usability and functionality. You will utilize your extensive experience in software development, data analysis, and Generative AI techniques to formulate groundbreaking AI solutions that streamline processes and elevate the user experience.We are looking for a versatile Senior Software Engineer who excels in adaptability and possesses strong cross-team communication skills. Given the rapid advancements in the software sector, your ability to quickly learn and implement new technologies and methodologies is crucial.Key ResponsibilitiesSpearhead the design and implementation of innovative user-facing features within our platform.Work in close collaboration with backend engineers to seamlessly integrate and utilize APIs.Take ownership of the frontend codebase, ensuring adherence to best practices for scalability and performance.Actively engage in code reviews, maintaining high standards for quality and reliability.Organize and prioritize tasks, collaborating with the team to ensure project milestones and deadlines are achieved.Stay updated with the latest advancements in frontend technologies and AI to discover innovative solutions for integration into our platform.QualificationsMinimum of 5 years of experience in software development, particularly focused on frontend technologies.Proficient in React and familiar with modern frontend frameworks and libraries.Solid understanding of frontend architecture, design patterns, and best practices.Experience with performance optimization and debugging tools.Strong problem-solving skills and a passion for user-centric design.

Join virtu as a Software Engineer specializing in Desktop Frontend Development using C# and WinForms. In this role, you will collaborate with cross-functional teams to create user-friendly applications that meet the needs of our clients.