Senior Frontend Engineer

Join our dynamic team as a Frontend Developer, where you will be responsible for crafting engaging and responsive user interfaces. Your expertise in UI/UX and robust JavaScript skills will be vital as you thrive in our fast-paced collaborative environment.Key ResponsibilitiesDesign and develop modern, responsive, and user-friendly web interfaces.Convert UI/UX designs and wireframes into high-quality, maintainable code.Work closely with designers, backend developers, and product teams to deliver seamless applications.Enhance performance, speed, and scalability of applications.Ensure consistent application functionality across various browsers and devices.Implement reusable components, design systems, and establish best practices.Troubleshoot and debug UI issues, while enhancing existing features.Engage in code reviews and contribute to continuous improvement efforts.

Join our dynamic team at Stemxpert1 as a Senior Frontend Developer, where you will play a pivotal role in designing and implementing cutting-edge web applications. You will collaborate closely with cross-functional teams to enhance user experiences and ensure the seamless functionality of our platforms.

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 shape our projects.Your responsibilities will include building and maintaining frontend architecture, collaborating with cross-functional teams to develop and optimize customer-facing features, and creating high-performance libraries and components. If you possess experience with Scrum and can lead a small group of developers, that's a significant advantage.We are particularly keen on candidates who identify as 'uber developers'—those versatile individuals who can contribute across multiple domains, including software architecture and mentoring junior developers. Your ability to guide and support your teammates will be invaluable in this role.

Join our dynamic team at stemxpert1 as a Senior Frontend Developer. In this role, you will be responsible for designing and implementing user-friendly web applications using cutting-edge technologies. Your expertise will help us enhance our digital presence and deliver exceptional user experiences.

Join our dynamic team as a Senior Frontend Developer and lead our frontend engineering efforts with your expertise in React. As a pivotal member of our compact development team, you will influence significant technical decisions while collaborating with fellow developers to create impactful products. If you have a passion for coding, API development, and tackling unique challenges, we encourage you to apply.Experience with Scrum methodologies and the ability to lead a small developer group will be highly valued.If you consider yourself an ‘uber developer’—a versatile individual with a broad skill set—your application will take priority. This role requires not only development capabilities but also software architecture insights, guiding junior developers, and conducting code reviews, mentoring, and training.Key Technologies:• JavaScript• React• Redux• NodeYour Responsibilities:• Build and maintain frontend architecture• Collaborate with backend engineers, product managers, and design teams to develop, test, and deploy code• Create innovative features for our users• Optimize web pages for maximum speed and performance• Address problems creatively and effectively• Facilitate architectural discussions and foster consensus among team members• Promote best practices, collaboration, and continuous improvement• Diagnose and rectify bugs and performance bottlenecks• Write automated tests to ensure high-quality product delivery• Mentor and develop your teammatesWhat You’ll Need:• Extensive experience with React or React Native in medium to large-scale applications• Proven experience in mentoring engineers and establishing team best practices• Proficiency in writing clean, well-tested TypeScript code• A commitment to collaboration, integrity, and team growth• Strong verbal and written communication skills.

Join our dynamic team at jobsforhumanity as a Frontend Developer! We are looking for a talented individual with a passion for crafting outstanding user experiences. In this role, you will collaborate with designers and backend developers to create visually stunning and highly functional web applications.Your creativity and technical skills will contribute to the development of innovative solutions that empower individuals and communities. If you thrive in a fast-paced environment and are eager to make a difference, we want to hear from you!

Join a Transformative Team at PalantirAt Palantir, we create cutting-edge software that empowers organizations to harness the power of data for impactful decision-making. Our innovative platforms help partners in various fields, from pharmaceuticals to public safety, make informed choices that lead to lifesaving outcomes and efficient operations.About the OpportunityIf you are driven by the pursuit of engineering excellence and have a passion for boosting the productivity of your fellow developers, this role is for you!As a Software Engineer specializing in Frontend Developer Productivity, you will collaborate within our Frontend Infrastructure team to identify, design, and implement strategies that enhance engineering velocity and elevate the quality of our software.Our team oversees the entire frontend development ecosystem, ensuring seamless integration from the developer experience in the IDE to the end-user experience in the browser. We are tasked with:• Developing and optimizing the build and CI systems for a large-scale frontend monorepo comprising millions of lines of code and supporting hundreds of active developers.• Creating essential infrastructure for frontend development, including feature flags, internationalization support, and commit previews.• Building a GraphQL API for efficient declarative data loading that integrates multiple underlying services.• Contributing to Blueprint, our open-source UI framework, utilized by Palantir applications and developers globally.• Developing various tools and VSCode extensions that enhance the developer experience across the organization.With an ambitious roadmap ahead, this role offers you the chance to significantly impact application development at Palantir.

We are looking for a talented and innovative Frontend Developer to join our enthusiastic team at mergeapiintegrationsandbox. In this pivotal role, you will be responsible for designing and implementing user-focused web interfaces that significantly improve user experience and engagement. The ideal candidate should have a solid grasp of contemporary web technologies and a fervor for developing seamless, responsive applications.

Join Sonsoft Inc., a dynamic technology solutions provider, as a Java Frontend Developer. In this role, you will leverage your skills to develop innovative front-end applications using Java technologies. Collaborate with cross-functional teams to deliver high-quality software solutions that meet client needs.

Join Omen as a Frontend Web Developer and spearhead our web development initiatives, crafting innovative products from concept to launch. Collaborate closely with cross-disciplinary teams including design, product management, and internal platforms to deliver impactful features within dynamic product teams.As an integral member of our Genesis team, you'll contribute to developing a world-class tokenization and fund administration experience for Omen Genesis.Your ResponsibilitiesDevelop high-quality, performant web applications using React, TypeScript, and CSS-in-JS.Embrace ownership of features from design through implementation, serving as the web development expert.Enhance tools that streamline Omen's operations, wielding influence across the organization.Work in tandem with design and product professionals to quickly iterate and launch financial products.Create frameworks and abstractions that significantly empower fellow developers.Engage in backend development using TypeScript and AWS when necessary.Your QualificationsMinimum of 2 years of professional experience with modern web technologies and frameworks.Proficient in writing and debugging JavaScript in both Node.js and browser environments.Passionate about creating an exceptional developer experience.Demonstrated success in leading and delivering large-scale technical projects.Consistently uphold high standards for code quality, advocate for best testing practices, and enhance code review processes.Highly Preferred: Strong backend experience and knowledge, particularly in system design and high-performance backend systems, with familiarity in cloud interactions (potential for a full-stack role).

About the RoleAt Sigma, we are revolutionizing the way organizations operate by providing a robust platform built on modern data architecture. Our engineering team is expanding, and we are seeking passionate engineers who thrive on tackling complex challenges and delivering powerful solutions across our technology stack. Join a skilled team dedicated to making data accessible to all users effortlessly.Your ResponsibilitiesCraft sophisticated and responsive user interfaces utilizing cutting-edge front-end technologies, taking ownership of significant product components from conception through launch.Collaborate closely with product management, UX design, and backend development teams to create innovative features that enhance our product experience and simplify usability for non-technical users.Apply your front-end development expertise to create unique visualizations for both structured and unstructured data while developing techniques to enhance application performance and interactivity.Utilize modern front-end frameworks such as React, GraphQL, TypeScript, and Node.js.Required QualificationsOver 10 years of experience in developing and maintaining high-quality software solutions.A keen eye for design and a strong commitment to building exceptional products that deliver outstanding user experiences.Proficiency in balancing functionality with delivery speed to maximize customer value while iterating based on feedback and strategic priorities.A collaborative spirit with a desire to enjoy work while taking pride in ownership of your contributions.A strong sense of craftsmanship and an intellectual curiosity to tackle various challenges at Sigma.Solid foundation in computer science principles.Preferred Qualifications (and skills you'll gain!)Experience in developing software capabilities for analyzing large-scale data-driven web applications.Previous experience within a rapidly growing organization, addressing technical challenges to facilitate ongoing success.

About ClayAt Clay, our mission is to empower organizations to transform their growth aspirations into tangible successes.We believe that growth is a creative endeavor rather than a mere formula. Identifying and engaging your ideal customers necessitates innovative thinking and ongoing refinement. In a landscape where AI accelerates execution and makes strategies easily replicable, creativity stands as the ultimate differentiator. We proudly support a diverse array of clients — including Anthropic, Notion, Google, and Ramp — in their market journeys through unique data insights, signals, and AI-driven research.In 2025, we achieved a remarkable milestone of $100M in revenue and secured a $100M Series C at a $5B valuation, supported by top-tier investors such as Sequoia, CapitalG, and First Round. Our commitment to our stakeholders is evident as we completed our second employee tender offer and initiated a community equity round for our customers, agency partners, and club members.Here are some key insights about our organization:Our community comprises over 11,000 customers, 150+ integration partners, 125+ agencies, 50+ Clay clubs, and 30,000 members on Slack.Our unique culture fosters creativity both in and outside of work. Our team is comprised of DJs, activists, writers, clowns, marathon runners, skydivers, psychedelic therapists, social workers, and much more.All employees have access to complimentary sessions with world-class coaches specializing in creativity, management, and other fields.Our operating principles — including negative maintenance and non-attached action — inform our workflow. Discover more about them here.For more insights about our company, check out our feature in the New York Times.

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.

Are you a passionate .NET Frontend Developer looking to take your career to the next level? Join us at 360IT Professionals, where we are committed to delivering exceptional technology solutions. In this role, you will work collaboratively with a talented team to create innovative and user-friendly applications that make a difference.

Join Ramp as a Senior Software Engineer on our dynamic GTM Platform team, where you will play a pivotal role in shaping our frontend architecture and enhancing user experiences. You will collaborate with cross-functional teams to deliver scalable and high-performance web applications that drive our business objectives.

Join Grow Therapy as a Web Frontend Engineer and be part of a dynamic team committed to enhancing mental health support through innovative technology. In this role, you will design and implement user-friendly web applications that elevate the user experience for clients and therapists alike.

Join Airgoods as a Frontend Software EngineerAirgoods is revolutionizing food and beverage distribution.We empower emerging brands, such as Fishwife, Ghia, and David Protein, to grow their wholesale business and secure placements in the nation’s premier specialty food retailers.Founded in January 2023, we have successfully raised $7M from esteemed investors including Y Combinator and Initialized Capital. Our team operates fully in-person, with our office located near Madison Square Park in New York City. Meet Your Future TeamPaolo (Co-founder and CTO): A Yale alum with a background in Computer Science and Economics, Paolo has previously engineered software at his brother’s startup Momence (YC S20) and is a sports enthusiast.Elian (Co-founder and COO): Another Yale graduate, Elian brings experience from his time at a VC fund and a passion for soccer.Aaron (Co-founder and CEO): With a strong background in economics and experience in wholesale distribution, Aaron is committed to driving Airgoods' vision forward.Join us and work alongside our talented engineering team to shape the future of food distribution.

Join Crosby as a Staff Frontend Engineer, where you will lead the development of innovative web applications that enhance user experiences. Collaborate with cross-functional teams to design, implement, and maintain scalable software solutions. Your role will involve mentoring junior developers, conducting code reviews, and ensuring best practices in frontend development.

About RilletAt Rillet, we empower accounting and finance teams to enhance their operational efficiency. Our clients are the financial strategists of their organizations, and our mission is to provide them with tools that deliver unparalleled speed, accuracy, and insights.Rillet is an innovative AI-driven ERP solution designed to facilitate rapid financial closures. What sets us apart is our cohesive data model, extensive range of seamless integrations (including Stripe, Ramp, Salesforce), automated workflows that are both efficient and auditable, and our growing suite of specialized AI agents that tackle various financial tasks. We take pride in maintaining a perfect customer satisfaction score. High-growth companies such as Mercer, Windsurf, and Function Health appreciate our ability to scale alongside their financial infrastructure.With significant backing of $100M from top-tier investors including Sequoia, a16z, Iconiq, Oak HC/FT, and First Round, we are poised to revolutionize financial operations.Our CultureRillet is a fast-paced environment where intelligence is essential. To thrive here, one must exhibit remarkable agility, proactivity, and adaptability.Successful team members at Rillet take initiative, internalize our mission, devise innovative strategies, and deliver superior results that surpass expectations.Our work is customer-centric, and we seek individuals who take pride in delivering high-impact solutions, even when they diverge from the initial plan.While accounting experience is not mandatory, a genuine appreciation for how our solutions empower our clients is crucial. Our team members are passionate about enhancing the financial backbone of the most dynamic companies around the globe.Position OverviewWe are in search of a skilled Senior Frontend Engineer to enhance the user interface of Rillet's cutting-edge accounting and finance software. In this role, you will collaborate with our CTO, product team, and designers to create user-friendly, high-performance interfaces that finance professionals will love to utilize.We value in-person collaboration and prefer candidates who are within commuting distance of our New York City or San Francisco offices, or those willing to relocate. Our team members are expected to work in the office on Tuesdays and Thursdays, along with one additional flexible in-office day. Some roles may necessitate more in-office presence based on specific functions.