Senior Fullstack Software Engineer

Padlet is on a mission to revolutionize education through innovative software solutions that foster curiosity, creativity, and community. Our platform empowers millions of classrooms globally, facilitating visual content creation and collaboration.We believe that exceptional software must excel in every important aspect. Just like the Dyson vacuum cleaner, which is not only effective but also aesthetically pleasing, easy to handle, and portable, we are in search of Fullstack Engineers who can craft outstanding software products for a billion users.

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.

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.

About FormalAt Formal, we are revolutionizing data security with our cutting-edge platform designed to empower teams to effortlessly understand and manage their data.We are developing an advanced protocol-aware reverse-proxy for data stores and APIs that enables organizations to gain real-time insights into their data. This innovative approach allows teams to monitor how sensitive data is stored, accessed, and utilized, thereby enforcing strict least privilege policies through techniques such as data masking, filtering, and anonymization.Our solutions have earned the trust of industry leaders like Ramp, Gusto, and Notion, who rely on us for data security, compliance, data quality management, and infrastructure access.Backed by top-tier venture capital firms, including Thrive Capital and Y Combinator, we also enjoy the support of angel investors who are executives and founders from renowned companies like Datadog, Clickhouse, Plaid, and Vanta.About the RoleFormal is committed to assembling an exceptional engineering team, and we seek passionate individuals who are eager to make a significant impact on our product and company growth.The ideal candidate possesses a profound knowledge of building scalable systems, a strong sense of ownership, and thrives on overseeing projects from their inception to full-scale production.Our current technology stack includes Typescript, NextJS, Shadcn, Vercel, and Golang.Your ResponsibilitiesDrive continuous improvements in the performance and reliability of our frontend application through code optimization and enhancement identification.Elevate existing features by integrating user feedback and executing enhancements to usability and design.Assume ownership of the frontend architecture, ensuring it is scalable, maintainable, and aligned with industry best practices.Lead initiatives that you believe will significantly impact Formal's success.Key QualificationsDemonstrated experience in software development for data-intensive platforms.Strong proficiency in modern frameworks (e.g., React, Vue.js) and backend languages (we utilize Go). Familiarity with streaming data processing frameworks like Apache Kafka and Google Pub/Sub.Experience with essential infrastructure components such as Kubernetes.

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

P-160 About Us At Databricks, we are dedicated to empowering data teams to tackle some of the most challenging problems in the world — from transforming the next mode of transportation into a reality to expediting the development of medical innovations. We achieve this by developing and operating the leading Data Intelligence Platform, enabling our customers to leverage profound data insights that enhance their operations. Founded by engineers with a customer-centric approach, we eagerly embrace every opportunity to confront technical challenges, whether it involves designing next-generation UI/UX interfaces for data interaction or scaling our services and infrastructure across millions of virtual machines. Our journey is just beginning. As a Senior Full Stack Software Engineer, you will collaborate with your team and product management to simplify data insights for our users. We seek engineers who are customer-focused and capable of overseeing the entire product lifecycle, extending beyond mere technical execution. You will lay the groundwork for creating robust, scalable, and delightful products. Below are examples of experiences you will design for our customers, facilitating the complete project lifecycle from data loading and results visualization to statistical model creation and production deployment: User-friendly workflows for creating, configuring, and managing large-scale compute clusters, networks, and data sources. Develop, deploy, test, and upgrade intricate data pipelines, featuring powerful visual data graphs. Streamlined onboarding and management for all organizational members to adopt a data-driven approach. Exceptional SQL-centric data exploration and dashboarding experience on Databricks. An interactive environment for collaborative data projects at scale, with a straightforward path to production.

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.

Join Hive as a Senior Frontend Software Engineer!At Hive, we are at the forefront of cloud-based AI solutions, dedicated to revolutionizing the way organizations understand, search, and generate content. Trusted by some of the world's most innovative companies, we empower developers with a suite of top-tier, pre-trained AI models, handling billions of customer API requests each month. Our robust software applications, fueled by proprietary AI models and datasets, are paving the way for groundbreaking use cases in content moderation, brand protection, sponsorship measurement, and context-based advertising.With over $120M raised from esteemed investors such as General Catalyst, 8VC, Glynn Capital, Bain & Company, and Visa Ventures, Hive is proud to employ a diverse team of over 250 talented individuals across our offices in San Francisco, Seattle, and Delhi. If you're ready to shape the future of AI, we want to hear from you!About the RoleAs a Senior Frontend Software Engineer, you will play a pivotal role in developing our Hive Data and Hive Enterprise products. Collaborating closely with designers, product owners, and fellow engineers, you will create innovative user interfaces that define our platforms. Utilizing the latest web technologies, including React, Redux, Webpack, and ES6, you will deliver exceptional user experiences. Given our small, agile team, you will have the opportunity to iterate rapidly and make impactful software design decisions regarding product features. We seek candidates with a strong technical foundation who are passionate about frontend technologies and thrive in a dynamic, fast-paced environment.

Join Mercor: Pioneering AI and Labor Market IntegrationAt Mercor, we operate at the forefront of labor markets and artificial intelligence (AI) research. Collaborating with esteemed AI laboratories and businesses, we deliver the invaluable human intelligence needed for AI evolution.Our extensive network of talent trains cutting-edge AI models, similar to the way educators guide students—by imparting insights, experience, and context that coding alone cannot convey. Currently, over 30,000 experts in our network collectively generate more than $2 million daily.Mercor is pioneering a new realm of work where expertise accelerates AI progress. To realize this vision, we seek an ambitious, dynamic, and dedicated team. You’ll collaborate with researchers, operators, and AI enterprises that are redefining societal systems.As a profitable Series C company valued at $10 billion, we maintain a five-day in-person work schedule at our new San Francisco headquarters.Your RoleWe are on the lookout for a product-focused Fullstack Software Engineer with robust technical expertise and a keen sense for product design. This position is perfect for individuals who relish taking ownership of user-facing features from conception to deployment, while possessing a deep understanding of the business and market dynamics that underpin their creations.In this role, you will enhance core marketplace interfaces that influence how engineers discover Mercor, apply for opportunities, complete assessments, and ultimately earn income. Achieving success here requires sound judgment, comfort with ambiguity, and the knack for delivering high-quality experiences swiftly without unnecessary complexity.This is not a limited backend or frontend role; your responsibilities will span:Frontend: React / Next.js, user journeys, UX nuances, performance, and refinement.Backend: Python and Go services, APIs, data structures, and integrations.Data: MongoDB and SQL, metrics, funnel analysis, and operational integrity.By the end of the process, you will be matched with a team where you can make the greatest impact in one of the following areas:Talent Platform Side – Developing next-gen tools that automate end-to-end recruitment, intelligently connect candidates to roles, and facilitate global hiring with seamless contracts and payments.Applied AI/Human Data Side – Collaborating with top-tier AI researchers from leading labs like OpenAI, Anthropic, and Google to create post-training datasets that enhance foundational model capabilities.

About EventualAt Eventual, we recognize that every revolutionary AI application, whether it’s foundational models or autonomous vehicles, depends on the ability to process vast amounts of images, videos, and intricate data. Unfortunately, current data platforms like Databricks and Snowflake are optimized for spreadsheet-like analytics and not for the petabytes of multimodal data essential for AI. This leads to teams squandering months on fragile infrastructure instead of focusing on research and product development.Founded in 2022, our mission is to transform the way data is queried—whether it’s images, video, audio, or text—making it as straightforward as working with tables, while ensuring scalability for production workloads. Our open-source engine, Daft, is meticulously engineered for real-world AI systems, coordinating with external APIs, managing GPU clusters, and effectively handling failures that traditional engines cannot. Daft is already powering critical workloads at leading companies like Amazon, Mobileye, Together AI, and CloudKitchens.We have built a world-class team drawn from industry giants such as Databricks, AWS, Nvidia, Pinecone, GitHub Copilot, and Tesla, and we’ve quadrupled in size within just one year. Backed by Series A and seed funding from investors including Felicis, CRV, Microsoft M12, Citi, Essence, Y Combinator, Caffeinated Capital, and Array.vc, we’re now looking to double our team. Join us at Eventual as we embark on this exciting journey!We're seeking passionate individuals eager to collaborate in a close-knit team environment, working together four days a week at our Mission District office in San Francisco.

At Plaid, we envision a future where financial interactions are seamless and empowering. Our mission is to revolutionize how individuals manage their finances through innovative tools and experiences utilized by thousands of developers. We support millions in achieving healthier financial lives by enabling connections to their financial accounts through the apps they love. Collaborating with leading companies such as Venmo, SoFi, and many Fortune 500 firms, our network encompasses over 12,000 financial institutions across the U.S., Canada, the UK, and Europe. Established in 2013, our headquarters is in San Francisco, with additional offices in New York, Washington D.C., London, and Amsterdam.As a Senior Fullstack Software Engineer at Plaid, you will play a pivotal role in shaping the future of financial access. You will design and develop robust systems and engaging user experiences that facilitate millions of connections to their finances. Your expertise will span the entire technology stack, allowing you to create scalable backend services and APIs while also delivering intuitive frontend experiences that bring our solutions to life.This position is perfect for engineers who thrive on alternating between backend problem-solving and frontend design, and who are eager to amplify their influence across both domains. You will work collaboratively with product managers, designers, and fellow engineers to deliver reliable, secure, and user-friendly products. At Plaid, you will take ownership early, contribute to key architectural decisions, and witness your contributions impacting millions of users.

Side Inc. builds technology that helps real estate professionals launch and manage their own boutique firms. The company’s platform takes care of legal, regulatory, and operational details, so agents can focus on selling homes and growing their businesses. As a Brokerage-as-a-Service provider, Side streamlines daily operations for real estate entrepreneurs. The platform is designed to improve efficiency, support client relationships, and make it easier for agents to run independent brokerages. Side is headquartered in San Francisco and has secured over $300 million in funding from major venture capital firms. The team includes experienced real estate professionals and engineers who work together to support agents as they build their businesses. Side is known for its rapid growth and ongoing innovation in the real estate sector.

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

Compensation: Competitive base salary with significant equity options.Benefits: Comprehensive health and dental insurance, gym reimbursement, and daily team lunches.At Julius, we are pioneering an applied AI lab focused on developing coding agents. Our mission is to empower one billion individuals to become software creators, starting with innovative data science and analysis applications.Currently, our team has successfully executed 1 million lines of code every 36 hours, catering to over 1 million users while generating more than 3 million data visualizations.Our compact technical team comprises professionals with backgrounds from top companies such as Uber, Microsoft, and Facebook. We are generating revenue and are proudly supported by prominent investors, including AI Grant and founders from Vercel, Notion, Perplexity, Palantir, Replit, Zapier, Intercom, Dropbox, as well as researchers from OpenAI and Google DeepMind.Creating intuitive and high-performance user interfaces is essential for ensuring that Julius remains user-friendly for our vast audience. Our interface encompasses various components such as tool utilization, multi-step reasoning, code generation, execution, file management, and more. In this role, you will have the opportunity to define and build experiences across these elements as we expand toward our future objectives.

About OmniOmni is an innovative business intelligence and embedded analytics platform designed to empower customers to explore, comprehend, and leverage their data effectively. With our headquarters situated in the vibrant city of San Francisco and additional hubs located throughout EMEA and APAC, we proudly partner with esteemed investors such as ICONIQ Growth, Theory Ventures, First Round Capital, Redpoint Ventures, Google Ventures, Snowflake Ventures, and Databricks Ventures.About the RoleAs a Software Engineer focused on AI Frontend, you will play a pivotal role in developing user interfaces and functionalities for our AI-driven analytics service. This position offers you the unique opportunity to craft intelligent workflows and design AI-integrated tools that enhance user experiences.You will collaborate with a highly skilled team and possess the autonomy to prioritize tasks and tackle challenges independently or in conjunction with your colleagues. At Omni, all software engineers engage across our technology stack to address customer needs, whilst our engineering culture emphasizes rapid, iterative shipping without compromising on performance and quality.Recent projects include:Fully functional spreadsheets integrated within our BI platform.Development of an MCP server for Blobby, our AI chatbot capable of generating queries within the constraints of a semantic data model.Facilitating CSV uploads.Enabling data writing capabilities to Google Sheets.

Postman Inc. seeks a Senior Fullstack Software Engineer in San Francisco, California, to help advance the future of API collaboration. This role involves working across both front-end and back-end systems, with a focus on building reliable, scalable solutions that support the company’s platform. Responsibilities Design and develop features across the full technology stack, from user interfaces to backend services Collaborate with cross-functional teams to deliver improvements that enhance user experience and workflow efficiency Contribute to architectural decisions and drive ongoing improvements in software design Mentor junior engineers and support the growth of technical expertise within the team Requirements Proven experience building and maintaining fullstack applications Strong understanding of both front-end and back-end technologies Ability to work effectively with engineers, designers, and product managers Interest in shaping technical direction and contributing to team development