Lead Frontend Engineer

Join DEUNA, an innovative startup at the forefront of transforming global commerce with our cutting-edge AI-driven platform, ATHIA. This remarkable orchestration and payments solution empowers enterprises to enhance approval rates, minimize costs, and unlock new revenue streams. As a product developed by a team that has established DEUNA as the fastest-growing Commerce OS in Latin America, ATHIA integrates payment intelligence, checkout optimization, and data orchestration in one powerful package.With extensive integrations across over 300 payment service providers and alternative payment methods, and with more than 20% of Mexico's digital economy leveraging our platform, we streamline global payments through a single integration and centralized reconciliation.As we expand into the U.S. market to cater to the urgent needs of large retailers, marketplaces, airlines, and quick-service restaurants, we invite you to be part of our team and help shape the future of payments!

Your ImpactJoin Onyx, a leading open-source initiative with a thriving community of hundreds of thousands of users. Our project boasts over 13,000 stars and a vibrant community of more than 3,000 members on platforms like Slack and Discord. As a Technical Lead in Frontend Development, your contributions will shape the future of our product, potentially impacting millions of users worldwide. About the RoleAs an early team member, you will be instrumental in defining our core product. Help us transform into the premier “GenAI for work” application on the global stage!Your responsibilities will include:Leading frontend development for our default open-source chat interface, enterprise search platform, and agent builder, focusing on:Creating a stunning core search and chat experience with seamless animations and top-notch performance, akin to building the UI/UX layer for both Perplexity and ChatGPT.Implementing a diverse feature set, including workspace search, internet search, code interpretation, artifact management, deep research, and much more.Collaborating closely with our design team and founders to ensure alignment and vision.Establishing frontend priorities and best practices to foster a high-quality development environment.Building a robust culture of design and frontend engineering excellence.Encouraging community engagement by guiding contributors in enhancing the frontend.This position is on-site in San Francisco, CA. You’ll Be Successful If You Have…A minimum of 4 years of experience in frontend engineering, specifically in developing complex, user-facing applications.A high standard for your work and the ability to inspire others to achieve exceptional results.Deep expertise in JavaScript, TypeScript, React, NextJS, and other cutting-edge frontend technologies.Strong communication skills, enabling effective collaboration with cross-functional teams.A keen product and design intuition that guides your development choices.⭐ Bonus Points If You Have:Experience with Python and Postgres.A degree in Computer Science or a related technical field.Background as a founder or early-stage engineer in a seed or Series A startup.

Why Weave ExistsAt Weave, we are revolutionizing the way therapeutic knowledge is captured, transformed, and communicated throughout the drug development process. Our mission is to empower human experts with cutting-edge AI tools, ensuring drugs reach patients swiftly, safely, and cost-effectively.The Weave Platform optimizes regulatory workflows from inception to completion, seamlessly integrating AI into every phase. Collaborating with our clients, Weave is crafting the ultimate AI toolkit for the entire therapeutic lifecycle.Your Role & MissionWe are in search of a Lead Staff Frontend Engineer to spearhead the technical direction of our frontend platform. This high-impact role involves defining the architecture, establishing engineering standards, and constructing the foundational systems upon which the engineering team will build. You will balance hands-on technical work, cross-team collaboration, and elevating our software development practices.In this role, you will identify key technical challenges, foster alignment on solutions, and ensure our architectural decisions support scalable growth. We prioritize creating simple, well-tested, and reliable systems over pursuing the latest frameworks.What You'll OwnTechnical Leadership & ArchitectureDefine and refine the frontend architecture for our platform, weighing immediate velocity against long-term maintainability.Establish engineering standards, design patterns, and best practices throughout the frontend codebase.Drive the technical strategy and roadmap for frontend infrastructure, architecture, developer tooling, and experience.Be the go-to technical decision-maker for high-stakes, ambiguous problems, documenting your rationale.Foundational SystemsDesign and build the core systems that product engineers rely on: component libraries, shared abstractions, performance infrastructure, and testing frameworks.Oversee the architecture of our document editor experience, including real-time collaboration, conflict resolution, and extensibility.Enhance frontend build, deployment, and observability tools to maintain team speed and confidence.Cross-Team ImpactCollaborate with Product, Design, and backend engineering to formulate technical solutions for complex product challenges.Mentor and guide junior engineers, fostering a culture of knowledge-sharing and continuous improvement.

Develop a robust data architecture for real-world robotic operations.As robotics transitions from experimental environments into active use across industries such as manufacturing, logistics, and transportation, the need for reliable data becomes paramount. Engineers depend on data to diagnose failures, rectify unexpected behaviors, and enhance functionality.At Foxglove, we create the observability, visualization, and data infrastructure necessary for these advancements. Our tools empower robotics and autonomous systems teams to efficiently manage and analyze vast amounts of multimodal sensor data from active systems and production fleets.Exceptional frontend engineering is crucial to our products and the overall success of our organization. We aim to redefine the standards of web applications, delivering both browser-based and desktop applications.We seek a talented Technical Lead Manager (TLM) who is passionate about tackling intricate product challenges and possesses a strong drive for continuous improvement. In this position, you will oversee the application's architecture, including authentication, navigation, component systems, build processes, analytics, and error reporting, ensuring consistency across various feature teams.Key ResponsibilitiesTake complete ownership of features, collaborating with customers, community members, design teams, and product management to gather requirements.Lead a skilled team to execute projects while upholding high standards.Deliver features in collaboration with your team.Design, develop, and refine the core frontend application architecture, including authentication systems, navigation processes, and shared components.Oversee and maintain the application's build and packaging pipeline, as well as shared infrastructure like analytics and error tracking.Contribute across the software stack and help establish consistent patterns and tools for application feature teams.Participate in product and architecture discussions to enhance the overall product experience.Manage, mentor, and develop a team of frontend engineers, providing regular feedback and conducting performance evaluations.Assist in recruitment efforts by leading technical and managerial interviews and influencing hiring decisions to attract top talent.QualificationsProven experience in leading engineering teams, preferably in a frontend development context.Strong understanding of data infrastructure and application architecture.Excellent communication skills and the ability to collaborate effectively with cross-functional teams.Experience with modern frontend frameworks and best practices.A proactive approach to problem-solving and a passion for innovation.

Zyphra is a cutting-edge artificial intelligence company located in the heart of San Francisco, California.About the Position:As our Lead Frontend Engineer - Agentic Interfaces, you will spearhead the design and development of the user-facing elements of our agentic systems. Your expertise will shape the way users engage with AI technology across various platforms, including desktop applications and web browsers. You will collaborate closely with engineers, machine learning researchers, and backend teams to create user experiences that are not only functional but also intuitively accessible.Your Responsibilities Include:Crafting and developing user interfaces for both browser and desktop applicationsCreating and maintaining comprehensive component libraries and styling systemsAnalyzing user interactions and refining user flows based on feedback and usage dataPrototyping and implementing UI features in conjunction with machine learning and backend teamsSimplifying the complexities of AI products to ensure they are accessible and empowering for a diverse user baseQualifications:Proficient in frontend technologies, with a strong command of HTML, CSS, and JavaScript/TypeScriptHands-on experience with modern frameworks, particularly ReactA keen eye for UI detail and usability, maintaining a user-centric approachAbility to rapidly prototype and iterate designs using tools like FigmaExperience in designing responsive, accessible, and high-performance user interfacesStrong understanding of human-computer interaction principles, accessibility, and visual designExcellent communication and collaboration skills to work effectively with engineers, designers, and researchersPreferred Qualifications:Experience in designing or developing browser extensions or desktop applications (e.g., Electron, Tauri)Familiarity with mobile platforms and responsive design is a plusPrior involvement in products featuring complex workflows, automation, or agentic behaviorsInterest or experience in backend development, APIs, or AI systems

About KiddomKiddom is an innovative educational platform committed to fostering student equity and growth by integrating high-quality instructional materials with engaging digital learning experiences. Our platform offers exceptional curriculum management capabilities, empowering schools and districts to take charge of their educational content. This results in tailored learning experiences that cater to the unique needs and aspirations of local communities. With detailed insights into teacher and leader performance, Kiddom drives continuous improvement in instructional strategies, school/district programs, and professional development.At Kiddom, we are passionate about revolutionizing education through state-of-the-art technology. Our mission is to create a comprehensive platform that equips educators and learners with advanced tools and data-driven insights. We are seeking a skilled Lead Software Engineer specializing in Frontend development to join our team and spearhead the design and implementation of scalable, frontend-centric solutions.As the Lead Software Engineer - Frontend, you will be pivotal in architecting and delivering full-stack product features with a focus on frontend architecture. Your responsibilities will include defining, building, and optimizing product features and addressing complex challenges at scale. You will collaborate with senior engineers to select optimal tools and technologies while implementing robust, production-ready software solutions.

About Cogent SecurityCogent Security is an innovative Applied AI Lab dedicated to developing the next generation of AI agents for cybersecurity. As cyber threats evolve, so do our defenses. Our 'AI Taskforce' analyzes vast amounts of enterprise data to proactively address potential breaches before they can escalate.To maintain our edge, we integrate pioneering research with practical implementation. In addition to our core product initiatives, Cogent Research acts as our applied AI laboratory, fueling our ability to create truly intelligent security workflows.Since our launch, Cogent has rapidly expanded, collaborating with Fortune 500 companies to secure some of the world's most intricate production environments.Supported by Greylock, we've assembled a team of exceptional talent in applied AI, including individuals from:Renowned universities such as Stanford, Berkeley, Penn, Duke, Carnegie Mellon, and WaterlooHigh-growth companies including Scale AI, Databricks, Stripe, Tesla, and CoinbaseLeading cybersecurity experts from Wiz, Abnormal AI, and ZscalerPrestigious research institutions like DeepMind and SAILAbout the RoleIn the role of Senior Frontend Engineer, you will take ownership of the frontend platform and user experience, empowering customers to visualize, understand, and act upon complex security data with assurance.This position is classified as Staff+ level; you will have previously operated as a Staff, Senior Staff, or Principal Frontend Engineer and will be eager to define the technical pathway for a new platform. Your responsibilities will include designing frontend infrastructure, developing 'golden' component libraries, and enhancing the platform’s AI capabilities, all while delivering customer-facing features.You will balance in-depth architectural design with hands-on development, ensuring our frontend stack is both sophisticated and robust as we scale. Over time, you will play a key role in mentoring junior frontend engineers, laying the groundwork for a strong team based on the foundations you establish.

The Role:Join us as a dynamic Frontend Tech Lead at f2-ai, where you'll take the helm in crafting our cutting-edge, AI-driven enterprise UI platform. This is a unique opportunity for an innovative engineer who enjoys building robust systems from the ground up and is eager to influence our technical direction while writing production-level code.Key Responsibilities:UI System Development: Design and implement foundational frontend features, actively coding and delivering essential React/TypeScript components.Frontend Architecture Leadership: Shape the technical vision and roadmap for our React-based UI platform, ensuring swift iterations and effective scaling of user experiences.Performance, Security, and Accessibility: Create high-performance, responsive interfaces that comply with SOC 2 and accessibility standards, emphasizing maintainability and cost-effectiveness.AI Integration: Collaborate with the team to incorporate intelligent features, data visualizations, and interactive tools that reveal AI-driven insights.Engineering Excellence: Establish and maintain coding standards, component libraries, and review processes; mentor fellow engineers to cultivate a culture of reliable, test-driven development.Collaborative Partnerships: Work closely with product, design, backend teams, and enterprise clients to translate requirements into elegant UI solutions.Qualifications:Proven Technical Leadership: 7+ years of experience in building and scaling mission-critical frontend systems using TypeScript and React, with a demonstrated capability to architect solutions from scratch.API Design Proficiency: Extensive experience in designing and utilizing RESTful and GraphQL APIs, including state management and effective data-fetching techniques.Results-Oriented Mindset: You excel in environments where you take ownership of features from start to finish, iterate quickly, and deliver production-ready UI solutions.Familiarity with Styling Solutions: Experience with CSS-in-JS methodologies (e.g., Styled Components, Emotion) or utility-first frameworks like Tailwind.

The RoleAs the Frontend Tech Lead Manager at ComfyUI, you will play a pivotal role in shaping our user interface while leading a talented team of frontend engineers. Your responsibilities will encompass owning the architecture and development of our core UI, ensuring that ComfyUI’s interfaces are efficient, reliable, and user-centric. While you will maintain a technically hands-on approach where beneficial, your primary focus will be on architectural design, technical direction, and team leadership. In essence, you will be instrumental in defining the future of ComfyUI’s frontend experience, guiding everything from the prototyping of innovative ideas to the delivery of polished releases.What You’ll DoLead Frontend Architecture: Spearhead the design and development of ComfyUI’s core frontend systems from inception. Establish a long-term vision for how our interface is structured and evolves.Technical Leadership: Actively contribute to crucial technical and product decisions within the leadership and engineering teams. Facilitate architectural discussions and ensure cohesive alignment across the stack.Mentorship & Team Growth: Mentor and manage frontend engineers, cultivating a high-performance team and a robust engineering culture. Participate in recruitment, hiring, and onboarding processes for new members.Establish Best Practices: Develop and enforce best practices for frontend code quality, testing, performance, and maintainability. Oversee the evolution and enhancement of our CI/CD and automated testing processes to ensure our frontend remains resilient as we scale.Cross-Functional Collaboration: Collaborate extensively with Product, Design, Backend, and AI/ML teams to refine the end-to-end user experience. Transform complex requirements into elegant interfaces and link the frontend to our generative AI pipelines.Project Planning & Execution: Manage project execution through timeline setting, task prioritization, and ensuring timely delivery of frontend milestones while balancing immediate goals with long-term technical health.Prototyping & Iteration: Rapidly develop and iterate on UI features to explore new concepts, validate user flows, and deliver a refined end-user experience. Transition product ideas into functional prototypes and enhance them into production-ready features.Stay Current: Stay abreast of the latest frontend technologies and trends. Assess new tools, libraries, or methodologies (such as advancements in Vue.js, TypeScript, Vite/Nx, or UI frameworks) to keep ComfyUI’s frontend modern and scalable.Quality & Optimization: Identify and resolve frontend performance issues and optimize the user experience.

OverviewAt mat3ra, we are on the lookout for innovative and experienced Senior Engineers to tackle complex challenges that intersect materials science, artificial intelligence, and software development. Join us in creating a cutting-edge software framework aimed at designing and discovering advanced materials and chemicals. Explore our codebase and connect with our dynamic team on GitHub.Your work will concentrate on: (1) crafting 3D and 2D design applications tailored for nanoscale materials and chemistry, (2) organizing data derived from models and experimental validations, and (3) delivering exceptional user experiences for our platform’s initial user base.As we expand, successful candidates will have opportunities to step into leadership roles. This position is full-time and permanent.

Overview: As a part of our ambitious expansion plan driven by strong market demand, Listen Labs is looking to enhance our engineering team with a talented Technical Lead. If you are passionate about leveraging technology to create innovative solutions that reshape decision-making for companies, we want to hear from you!About Listen Labs:Listen Labs is at the forefront of AI-driven research, transforming the way teams derive insights from customer interviews in mere hours instead of months. Our platform empowers users to analyze conversations, identify themes, and expedite smarter product decisions.Why Join Us?Exceptional Talent: Our team boasts multiple IOI medalists and includes experts from prestigious companies like Jane Street, Twitter, and Stripe, among others.Rapid Growth: Backed by Sequoia, we’ve scaled from zero to a $14M run-rate in under a year, maintaining a focus on quality and ownership.Strong Customer Base: We have secured significant wins with enterprises such as Google and Microsoft, showcasing our product's effectiveness across various segments.Proven Success: Our differentiated product has resulted in an industry-leading win rate and consistent customer acquisitions, leading to rapid expansions.Viral Engagement: Our product promotes organic growth, with interviews reaching thousands of viewers, generating daily interest from Fortune 500 companies.Technical Responsibilities:AI Research Agent Development: Design an AI agent that supports users throughout their research process, ensuring they leverage best practices for optimal results.Human Database Construction: Develop a comprehensive database of users to enhance our understanding and capabilities, enabling precise targeting and improved insights.

About UsAt thesirius, we're powered by the backing of a16z Speedrun, dedicated to providing innovative solutions that drive growth for top consumer brands. Our advanced technology is relied upon by industry leaders such as Higgsfield and Promova. As we scale our operations, we are on the lookout for talented professionals who are passionate about making impactful contributions to consumer technology advancements. Join our vibrant team where initiative, ambition, and a commitment to excellence in problem-solving are highly valued.Position OverviewIn the role of Senior Frontend Engineer, you will be instrumental in the design, development, and maintenance of the user-facing elements of our core products. Your key responsibilities will include:Crafting and implementing robust, scalable, and user-centric interfaces that accommodate new features and shifting business requirements.Collaborating seamlessly with backend engineers, product managers, and design teams to deliver high-quality, integrated solutions.Providing technical guidance through best practices, mentoring fellow team members, and engaging actively in code reviews.Championing the adoption of contemporary frontend technologies, frameworks, and methodologies to guarantee product quality and maintainability.Identifying and addressing intricate technical challenges pertaining to user experience, performance, and security.Fostering a culture of continuous improvement and operational excellence within the engineering team.QualificationsA minimum of 5 years of professional experience in frontend development for high-traffic applications.Expertise in JavaScript/TypeScript and familiarity with modern frontend frameworks.Proven experience in integrating frontend applications with backend APIs and third-party services.Strong understanding of UI/UX principles, performance optimization, and frontend architecture.Excellent analytical skills with a track record of independently driving projects to successful completion.Full-time availability and a strong passion for contributing to a high-growth, ambitious environment.How to ApplyWe invite you to submit a brief introduction along with your resume for consideration.

About SvixSvix is an innovative startup at the forefront of server-to-server communication, specializing in webhooks. Our robust, scalable infrastructure is trusted by prominent companies such as Etsy, TaskRabbit, Brex, and members of the Fortune 500.With a product and team ranked in the top 1%, we pride ourselves on our exceptional customer satisfaction and are dedicated to defining the next generation of developer infrastructure.Backed by an impressive $11 million investment from leading investors, including a16z and Y Combinator, alongside industry leaders from GitHub, Segment, Lookout, and Fly.io, we are poised for significant growth.

CHAOS Inc. is an innovative technology firm dedicated to providing cutting-edge solutions for the defense and critical industrial sectors. Established in 2022 by a team of experienced leaders, CHAOS has rapidly evolved into a hub for elite multi-disciplinary engineers focused on developing mission-critical technologies. Our company thrives on a mission-driven culture, committed to tackling the most demanding technical challenges. Through our unique agile engineering methodology, we facilitate swift prototyping while fostering strong partnerships with defense and industry to deliver practical solutions.Role OverviewWe are on the lookout for a talented and enthusiastic Technical Lead to join our product engineering team. This collaborative position offers the chance to take on diverse responsibilities and work closely with our product team. As a vital member of our engineering group, you will also have the opportunity to broaden your expertise across our diverse product line.In this role, you will utilize Palantir Foundry, our internal data operating platform, to build, maintain, and optimize comprehensive workflows and pipelines that manage sensor, operational, and enterprise data throughout the organization. You will collaborate with various teams to ensure our data infrastructure and workflows are dependable, scalable, and instrumental in achieving mission objectives. This position will be pivotal in delivering the CHAOS Operating System within Foundry—a unified data backbone connecting engineering, operations, and manufacturing.

About the Role The City and County of San Francisco is hiring a Technical Project Lead to manage important technology projects that support city operations. This position guides projects from initial planning through delivery, ensuring work stays on schedule and resources are used effectively. What You Will Do Define project scopes and set clear objectives Develop and maintain detailed project plans Coordinate with stakeholders across departments Monitor progress and adjust plans as needed to keep projects on track Support the team in reaching operational goals Who We’re Looking For This role calls for experience in technology project management and a track record of collaborating with cross-functional teams. Strong organizational skills and the ability to communicate clearly with both technical and non-technical colleagues are important for success.

Join The Trade Desk as a People Product Technical Lead, where you will play a pivotal role in enhancing our Workday platform. You will collaborate with cross-functional teams to drive technological innovations that support our human resource initiatives.We are looking for a passionate leader who thrives at the intersection of technology and human resources, ensuring that our people products are not just functional but transformative.

About UsAt doss, we are pioneering the future of operational intelligence with our innovative platform—a 'Terraform for operators.' Our AI-generated schema layer powers a customizable data warehouse, enabling companies dealing with physical goods to adapt their record systems in real-time as their business landscape evolves.Imagine leveraging AI foundation models for seamless schema migrations, enjoying real-time observability across operational and financial data, and managing intricate git versioning of schema and data modifications—all while developing workflows akin to infrastructure code.Your RoleDesign and implement the core frontend for our collaborative cloud platform.Take ownership of the technical roadmap for features related to customer-facing experiences.Develop adaptable infrastructure and components that scale in a composable software environment (think tools akin to Retool, Airtable, Zapier, Figma, and Notion).Your ExpertiseAbility to initiate projects from scratch in ambiguous settings.Proficient in Typescript, React, NextJS, and Tailwind CSS.Knowledgeable in GraphQL, Postgres, ORMs, and Node (Express).Competent in utilizing internal APIs to create complex frontend interfaces and components.Skilled in translating intricate Figma UI/UX designs into flawless browser implementations.Your AttributesCollaborative Spirit: You bring enthusiasm, openness, and curiosity to the team every day.Growth-Oriented: You view every experience as an opportunity to learn and uplift the team and company.Dedication to Quality: You take pride in creating high-quality products.Customer-Centric: You are deeply invested in enhancing the customer experience and delivering delightful products.Pragmatic Thinker: You make decisions based on practicality rather than theory.Humble: You thrive in a collaborative atmosphere where everyone contributes to the team’s success.Our BenefitsComprehensive medical, dental, and vision insurance.Unlimited Paid Time Off (PTO) along with mandatory US holidays.401(k) plan with immediate eligibility.Fitness stipends and wellness programs.

About UsAt Finix, we are revolutionizing the way businesses interact with money. As a comprehensive full-stack acquirer processor, we empower organizations of all sizes with innovative and adaptable payment solutions. Annually processing billions in transactions, Finix enables SaaS, marketplace, and e-commerce platforms to effortlessly accept payments, manage payouts, and onboard merchants. Our suite of no-code, low-code, and developer-friendly tools allows businesses to launch in mere hours rather than months.With over $175 million raised, including a significant $75 million Series C round led by Acrew Capital and backed by notable investors such as Lightspeed Venture Partners, American Express Ventures, and Sequoia Capital, we are poised for growth.As a Senior Frontend Engineer on our Frontend Engineering Team, you will play a pivotal role in architecting and constructing the core payment experiences that empower thousands of businesses. You will be responsible for developing our extensive payments management dashboards and embeddable components that merchants integrate into their applications seamlessly.This position allows you to influence the technical vision for customer-facing products from inception through to production. You will lead design and implementation decisions, ensuring our payment interfaces remain high-performing, secure, and user-friendly as we scale. Our engineering team operates with a high degree of autonomy and ownership—each engineer makes impactful contributions that directly enhance customer success in a dynamic fintech landscape.Finix seeks engineers who possess excellent technical skills, a keen eye for detail, a passion for growth, and a dedication to delivering an outstanding customer experience.

About NomadicMLNomadicML is at the forefront of transforming video data into actionable insights. We harness the power of machine intelligence to unlock the potential of over 5 trillion miles driven annually in America. Our vision-language models (VLMs) are revolutionizing how industries leverage video content, enabling advancements in self-driving technology, robotics, and industrial automation.Founded by Mustafa Bal and Varun Krishnan, who previously collaborated at Harvard University, our team boasts experience from leading firms such as Snowflake, Lyft, Microsoft, Amazon, and IBM Research. With a passion for innovation, we deliver mission-critical AI systems that drive tangible impact.About the RoleWe are seeking a Frontend Engineer who thrives in a fast-paced environment and excels at turning visionary designs into user-friendly, production-ready interfaces. You will collaborate closely with our founding designer and backend/ML teams to innovate and implement new product features, ensuring that our applications are visually appealing, intuitive, and function seamlessly.The ideal candidate will be results-driven, adept with modern AI-powered development tools, and eager to experiment and iterate. If you have a passion for transforming abstract concepts into exquisite, functional software, we want to hear from you.