Staff Frontend Engineer, AI

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 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.

Example Org is a pioneering software company that facilitates real-time collaboration on critical workflows. Established in 2012, we proudly serve over 10,000 customers globally and are supported by exceptional investors, including Example Capital. Having successfully raised our Series C funding, we are currently valued at $750 million.As a Frontend Engineer at Example Org, you will be an integral part of our innovative team, reporting directly to the team manager. You will have a significant impact on various workflows, contributing to the overall success of our projects.

About ApiphanyApiphany stands at the forefront of foundational AI technology for physical product development. Our mission is to empower innovators in industries such as automotive, aerospace, medtech, and energy to convert vast amounts of unstructured technical data into real-time, actionable insights. Supported by prominent investors from Markforged, Databricks, GM, and Character, we are dedicated to changing the landscape of engineering decision-making, transforming complexity into clarity for the world's leading manufacturers.Our sophisticated models are tailored to address the intricacies of engineering and manufacturing, comprehending principles of physics, design specifications, and program constraints. We are a tight-knit team of elite builders from top universities including Stanford, Berkeley, MIT, UW, and CMU, alongside industry leaders from GM, Ford, and Genesis Therapeutics. Our passion lies in revolutionizing hard-tech and collaboratively establishing a category-defining enterprise.About the RoleAs a Senior / Staff Frontend Engineer at Apiphany, you will play a crucial role in designing, building, and enhancing our state-of-the-art web application. You will be tasked with implementing high-quality UI components, developing the next generation of data visualization, ensuring optimal performance, and upholding best practices in frontend development.Your contributions will also include shaping the long-term frontend strategy, mentoring team members, and establishing engineering practices that will support the company's growth. You will work closely with design, backend, and machine learning engineers to transform massive data streams into intuitive and actionable insights for users, ensuring a seamless experience.

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.

Who We AreAt doss, we are innovating the landscape for operators by developing the "Terraform for operators"—an AI-driven schema layer that powers a white-labeled data warehouse. Our solution empowers physical goods companies to adapt their systems of record as swiftly as their business needs evolve.Imagine a world where AI foundational models facilitate schema migrations, delivering real-time observability across operational and financial data, managing complex git versioning for schema and data changes, and enabling workflows that can be composed like infrastructure code.Your ResponsibilitiesCollaborate closely with design teams and fellow engineers to deliver rapid, intuitive web browser experiences.Contribute to the technical roadmap and prioritize features enhancing the customer-facing experience.Design and implement flexible infrastructure and components that scale within a composable software environment, similar to tools like Retool, Airtable, Zapier, Figma, and Notion.Your SkillsAbility to navigate from concept to execution in ambiguous environments.Proficient in Typescript, React, NextJS, and Tailwind.Familiarity with GraphQL, Postgres, ORMs, and Node (Express).Experience in utilizing internal APIs to create complex front-end interfaces and components.Expertise in translating intricate Figma UI/UX designs into flawless implementations.About YouTeam Player: You bring enthusiasm, openness, and curiosity to the team every day.Growth Mindset: You view every challenge as an opportunity for personal and team development.Craftsmanship: You take pride in delivering high-quality work.Customer-First Attitude: You are deeply invested in enhancing customer experience.Pragmatic Approach: You make decisions based on circumstances rather than theory.Low Ego: You thrive in collaborative environments where teamwork is paramount.Benefits We OfferComprehensive medical, dental, and vision insurance.Unlimited Paid Time Off (PTO) along with mandatory US holidays.401(k) plan with immediate eligibility for participation.

About SimSim is at the forefront of creating the premier platform for AI agents, empowering developers and enterprises to visually design, deploy, and oversee high-performing agents that streamline workflows globally. Our vision is clear: AI agents will revolutionize how the world operates, and Sim is the key to making that a reality. With backing from renowned investors such as Standard Capital, Paul Graham, Perplexity, SV Angel, and Y Combinator, we have embraced open-source principles from our inception.Based in San Francisco, we are a dynamic, agile team that collaborates in person daily. With over 70,000 developers leveraging Sim, your contributions reach real users quickly and significantly. We value ownership, excellence, and the ambition of our builders as they shape the future from the ground up.Role OverviewAs a Frontend Software Engineer at Sim, you will be pivotal in developing our agent-building canvas and frontend platform. You will design intuitive user experiences, create robust and high-performance UI components, and help shape how thousands of developers utilize Sim. Collaborating with engineering, product, and design teams, you will take features from concept to production, directly influencing our product’s design, performance, and developer experience.Your ResponsibilitiesDesign and develop essential frontend systems focusing on visual, interactive experiences that enable users to create and manage AI agents.Lead the rollout of new features, UI components, and real-time interactions within a Next.js monorepo.Ensure the frontend experience is efficient, refined, and enjoyable at scale.Establish standards for front-end code, UI architecture, and design systems.Work closely with engineering, design, and product teams to create seamless developer workflows.Enhance our custom component library and expand our existing design system.Rapidly prototype and iterate, delivering impactful improvements daily.What We SeekExtensive experience with React and TypeScript.Strong understanding of UI/UX design principles and developer experience.Demonstrated capability to build sophisticated, interactive frontend applications (e.g., canvas editors, visual builders, collaborative tools).Knowledge of frontend performance, animations, and real-time systems (e.g., WebSockets, CRDTs).A proactive approach to problem-solving and a passion for technology.

Join Mindlance as a Lead Frontend Engineer and take the next step in your career by leading innovative frontend development projects. We are looking for a creative and driven individual who excels in building user-friendly interfaces and enjoys collaborating with cross-functional teams. You will be responsible for designing and implementing high-quality web applications, optimizing performance, and ensuring a seamless user experience.

About Resolve AIAt Resolve AI, we revolutionize software maintenance and production troubleshooting by developing an autonomous AI Production Engineer capable of diagnosing and resolving intricate system issues from start to finish.Our visionary founders, Spiros Xanthos and Mayank Agarwal, were instrumental in creating OpenTelemetry and have successfully led Splunk Observability, achieving two lucrative exits to Splunk and VMware.We are proud to have secured over $150 million in funding from elite investors such as Lightspeed, Greylock, and Unusual Ventures, alongside notable individual supporters including Jeff Dean (Chief Scientist, Google DeepMind), Thomas Dohmke (CEO, GitHub), Matt Garman (CEO, AWS), Reid Hoffman (Founder, LinkedIn), and Fei-Fei Li (Professor, Stanford).What You Will Be DoingOwn Frontend Design and ImplementationTake charge of delivering an exceptional user experience across Resolve AI's product suite by developing engaging, intuitive, and high-performance interfaces utilizing TypeScript, React, and cutting-edge frontend technologies.Shape Product VisionTransform complex AI capabilities and systems into user-friendly features that empower engineers to seamlessly interact with our AI agent, simplifying powerful workflows.Maintain High Standards of PerformanceCraft scalable frontend architectures that are not only maintainable but also responsive and performant, especially for data-rich visualizations and real-time applications.Collaborate with Users in MindEngage closely with backend engineers, designers, and product managers to drive product discussions and advocate for user-centric solutions that address genuine pain points.Rapid and Responsible IterationQuickly prototype new features and integrate user feedback through tight development cycles, ensuring UI quality through comprehensive testing, accessibility standards, and component reuse.Your Qualifications5+ years of software development experienceExpertise in TypeScript and React, with a strong understanding of modern frontend frameworks and tooling.Proven track record of designing and implementing scalable frontend systems.

Join our dynamic team at Midstream as a Frontend Software Engineer. In this role, you will leverage your technical expertise to design and implement innovative web applications that enhance user experience. You will collaborate with cross-functional teams to deliver high-quality software solutions that meet our clients' needs.

About FernAt Fern, we empower software companies to deliver exceptional API experiences. Our clientele includes renowned firms like Nvidia, Square, and Twilio, alongside innovative AI startups such as ElevenLabs and OpenRouter.As we look to the future, the majority of API integrations will be handled by AI agents. These agents require clearly defined schemas, structured endpoints, deterministic contracts, and concise documentation that can seamlessly integrate into their workflows.Our team, comprised of top-tier talent from Google, Palantir, Amazon, and Uber, thrives in a dynamic environment in Williamsburg, Brooklyn. With our recent acquisition by Postman, we now have access to 40 million users and 98% of the Fortune 500, while retaining our agile startup ethos.About the RoleAs a Frontend Software Engineer at Fern, you will create the interfaces that shape how developers and agents interact with APIs.Craft Exceptional Developer Interfaces: Develop sleek, responsive web experiences utilizing TypeScript and Next.js. Design documentation, dashboards, and tools that simplify complex API interactions.Focus on Performance and Quality: Deliver frontend solutions that are fast, dependable, and visually stunning. You will take ownership of architectural choices and the finer details that elevate our products. Discover how we leverage Vercel and Next.js for efficient multi-tenancy and expedited development cycles.Engage with Customers: Collaborate directly with API teams from industry giants like Nvidia, Twilio, and Square. You will troubleshoot real-world production challenges, refine APIs based on user insights, and implement enhancements swiftly.

Join Our Innovative TeamAt ChatGPT Engineering, we are dedicated to crafting the user interfaces that millions rely on daily. Our mission is to enhance AI capabilities through seamless, polished, and trustworthy experiences for our users. As a Frontend Engineer, you will play a pivotal role, collaborating with design, product, research, and backend teams to deliver intuitive and reliable features that scale globally.Our diverse teams focus on areas such as Growth, Ecosystems, Personalization, Search & Knowledge Experiences, and Platform UI. Together, we build foundational UI and product experiences that empower users to discover, trust, and gain value from ChatGPT.Your RoleWe are seeking talented Frontend Engineers to create cutting-edge product experiences for ChatGPT. You will focus on impactful user flows, UI architecture, and performance, delivering features that transform advanced AI into a simple, responsive, and delightful experience for users.Key ResponsibilitiesDesign and implement high-quality product experiences across web platforms.Collaborate with design and product teams to turn innovative ideas into stunning, accessible UIs.Lead frontend architecture decisions, including component systems, state management, routing, and client-side performance optimizations.Enhance reliability and quality through effective testing, monitoring, and tooling.Work closely with backend and data teams to integrate APIs and deliver comprehensive end-to-end features.Contribute to the long-term technical vision and participate in design and architecture reviews.Who You ArePossess strong frontend development skills using modern web frameworks (e.g., React, TypeScript) and have experience building scalable production UIs.Exhibit a passion for performance, accessibility, and craftsmanship, paying attention to detail while maintaining speed.Enjoy collaborating across the tech stack and working closely with design and product teams.Thrive in fast-paced environments and embrace ambiguity, all while upholding high quality standards.LocationWe welcome applicants from San Francisco, New York, and Seattle.About OpenAIOpenAI is at the forefront of AI research and deployment, committed to ensuring that general-purpose artificial intelligence benefits all of humanity. We push the limits of AI capabilities, striving for innovations that improve lives globally.

Join us on-site in San Francisco's vibrant Dogpatch neighborhood as a Staff Frontend Infrastructure Engineer.About GigaAt Giga, we are at an exciting juncture, having successfully raised a $61M Series A and established our presence with several paying clients, including industry leader DoorDash. Our mission is to revolutionize customer experience through real-time AI agents that comprehend emotions, resolve issues instantaneously, and scale across the largest enterprises globally.We are on a trajectory to become the premier AI platform for enterprise automation, bolstered by our cutting-edge voice superintelligence. To reach this ambitious goal, we are eager to expand our team with talented engineers like you.Our engineers have the autonomy to make a significant impact, affecting millions of users daily. This role offers a unique opportunity to work alongside brilliant founders, contribute to a commercially successful venture, and help shape a generational company.For more insights into our journey:Voice AI startup Giga raises $61M Series ADoorDash and Giga PartnershipGiga empowers top B2C companies, including DoorDash, to streamline their complex support and operations across voice, chat, and email. If you find this vision compelling, we invite you to apply!The RoleWe are searching for a Frontend Infrastructure Engineer tasked with developing the tools and systems that enhance the productivity of our frontend engineers. Your primary audience will be our internal engineering teams, as you create design systems, developer tooling, and foundational abstractions that will be utilized across the team.This role is distinct from product engineering; instead of delivering customer-facing features, you will focus on frontend API design, code quality infrastructure, and building reusable components that prioritize ease of use and efficiency. If you have experience in a design systems team, frontend platform team, or developer experience team within a larger organization, this role will resonate with you.What You'll Work OnHere are some examples of projects you may undertake:Design System: Develop and manage a component library featuring clean APIs, consistent patterns, and exceptional documentation.

Join Our Innovative Team at AirwallexAt Airwallex, we are revolutionizing the way businesses manage their payments and finances on a global scale. Our unified payments platform leverages cutting-edge technology to empower over 200,000 businesses, including industry leaders like Brex, Rippling, Navan, Qantas, and SHEIN. By joining us, you will be part of a dynamic team that is pushing the boundaries of financial technology.Founded in Melbourne and now boasting over 2,000 talented professionals across 26 offices worldwide, Airwallex is valued at $8 billion and backed by elite investors such as T. Rowe Price, Visa, and Sequoia. If you are eager to make a significant impact in your career, we invite you to be part of our journey.

Important NoticeThis is a full-time, in-person position located in San Francisco (Presidio). We operate from our office five days a week.Candidates must be based in the Bay Area or willing to relocate prior to employment.We require authorization to work in the US, but we are open to O-1 visa sponsorship for outstanding candidates.Your RoleYou will take charge of the frontend aspect of Sauna, delivering interfaces that are seamless, user-friendly, and refined, even when the underlying processes are intricate.You will independently make product and design decisions, rapidly prototype, and implement solutions without being constrained by exhaustive specifications. You may sometimes work from existing designs or create new ones.Technology StackKey technologies include TypeScript, React, Next.js, Y.js, TipTap, and Cloudflare Workers.Who You AreMinimum Qualifications4+ years of experience in frontend engineering with a portfolio that impresses the founders. Show us complex and polished interfaces you've developed.Proficient in TypeScript and React — you are knowledgeable about reconciliation, optimizing renders, and understanding browser behavior.Strong product sense and design intuition — you can interpret a rough product vision, draft user interactions, and create solutions that resonate. You notice when transitions are slightly too slow or when user affordances are ambiguous.Decisive in design — you will need to take ownership of certain UX choices, produce simple designs when necessary, and find paths to overcome obstacles.Autonomous and humble — you do not wait for permission or perfect guidelines. You implement, gather feedback, and improve.Detail-oriented — you care about aspects like loading states, empty states, error messages, and keyboard shortcuts. The myriad small details that enhance software quality matter to you.Preferred Qualifications (not mandatory)Experience with Y.js, Automerge, or CRDTs for real-time collaboration.Familiarity with rich text editors (ProseMirror, TipTap, Slate).Developed interfaces for LLM-based tools (handling streaming responses, uncertainty management, progressive disclosure, etc.).

About UsAt Sierra, we are revolutionizing how businesses engage with their customers by leveraging the power of AI to create more personalized and meaningful experiences. Though we are primarily an in-person company based in the heart of San Francisco, our presence is expanding globally with offices in Atlanta, New York, London, France, Singapore, and Japan.Our core values—Trust, Customer Obsession, Craftsmanship, Intensity, and Family—shape our culture and guide our decisions. These principles are integral to our mission and the way we operate as a team.Our visionary co-founders, Bret Taylor and Clay Bavor, bring extensive experience from their previous roles at OpenAI, Salesforce, Facebook, and Google, where they have driven groundbreaking innovations in technology.Your Role:Lead Frontend Development Across Key Platforms: You will take ownership of the frontend experience across our core product and marketing channels, ensuring an integrated and polished user experience. This includes developing features for our web application and collaborating on our website to maintain consistency in branding and high-quality user engagement.Drive Design System and UI Component Initiatives: You will architect, build, and sustain a scalable design system and a library of reusable components that empower our engineering and design teams. Your work will foster consistency and excellence across our products, collaborating closely with designers to establish guidelines for rapid development of visually stunning and cohesive user interfaces.Create Exceptional User Experiences: Collaborate with our design team to transform Figma designs into flawless user interfaces with meticulous attention to detail. You will refine UI patterns, ensuring every aspect from typography to animations is thoughtfully executed, resulting in an elegant and intuitive interface that resonates with users.

Join Hive as a Frontend Software Engineer and play a pivotal role in developing cutting-edge user interfaces for our innovative data and enterprise products. Collaborate closely with designers, product owners, and fellow engineers to build engaging web applications using advanced technologies like React, Redux, Webpack, and ES6. Work in a dynamic, fast-paced environment where your technical acumen and design insights will directly influence product features. Enjoy autonomy as you iterate quickly and contribute to the future of AI-driven solutions.

About Ivo Inc. Engineering Ivo Inc. builds AI-powered tools that reshape how legal teams work. The engineering group drives projects such as: An AI agent for MS Word that assists with document editing (2023) Agentic Retrieval-Augmented Generation (RAG) using imprecise embeddings models (2023) Large-scale legal fact extraction with LLMs (2024) An AI legal assistant for navigating complex contract databases (2024) Clustering legal documents by lineage (2025) Deviation analysis to uncover risks in contract repositories (2025) Tools for merging contracts and amendments into composite documents (2025) Role Overview: Frontend Software Engineer The Frontend Software Engineer will help shape user experiences for Ivo’s AI-driven legal platform. This role focuses on building intuitive interfaces and collaborating across disciplines to rethink legal workflows. Key Responsibilities Develop real-time, collaborative interfaces using AI capabilities Write efficient, high-performance UI code Create frontend components that integrate with LLM-based agents Work closely with designers, legal specialists, and engineers to improve legal processes Our Mission Many corporate legal teams face long hours and heavy workloads. Ivo’s mission is to ease that burden by automating tedious legal tasks with LLMs. Our AI-native platform has earned strong feedback, including an 85% trial win rate, and is making a difference for attorneys. The journey is just beginning. What Sets Ivo Apart Ivo’s engineers focus on practical solutions and thoughtful product development. Those who care deeply about software quality and want to see their work have real impact will find a strong sense of purpose here. Location San Francisco

At Lassie, we are revolutionizing the healthcare industry with our AI-driven solutions designed for medical practices.With over a million health practices spending more than $100 billion annually on administrative staff, the demand for efficient solutions has never been greater. The ongoing effects of COVID-19 have left many offices understaffed, leading to frustrated patients dealing with unanswered calls and confusing bills.We envision a future where AI seamlessly manages the operations of medical offices, handling administrative tasks and serving as the interface for patient interactions.Founded by Steijn Pelle, who propelled Robinhood and Coinbase to substantial revenue milestones, and Frédéric Renken, a former engineer and product pioneer at Superhuman, we are infusing consumer product expertise into healthcare and transforming the way doctors and patients engage.About the RoleWe are seeking a design-oriented Senior Frontend Software Engineer to develop a robust control plane for our powerful AI agents that manage billing and medical records. Your work will impact real patients and practices, as you create interfaces that inspire trust and ease of use.Emphasizing a consumer-friendly approach to healthcare software, we prioritize elegance and meticulous attention to detail. Your contributions will encompass various aspects including onboarding, human-in-the-loop review, and tools that empower practice owners to gain insights into their operations.You Are a Great Fit If You…Pursue excellence and are willing to refine your work until it achieves greatnessTake pride in crafting software that is fast and intuitiveSeek to maximize your impact through automation and effective processesPossess strong foundations in JavaScript and browser APIsShare our belief that healthcare software should be as delightful as consumer applicationsSome of Our Notable AchievementsDeveloped a synchronization engine utilizing encrypted SQLite in the browser, facilitating 100ms response times for healthcare payments and patient ledgersImplemented systems that significantly reduce the paperwork burden by thousands of hours each month