Back End Developer LeadSan Francisco, CAAt Rothy's, our mission is to revolutionize the fashion industry by prioritizing sustainability and ethical practices. We have successfully repurposed over 200 million single-use plastic bottles and 715,000 pounds of ocean-bound marine plastic into our signature thread, crafting wardrobe essentials that are as stylish as they are environmentally friendly.With a commitment to zero waste, we blend advanced 3D knitting technology with meticulous handcrafted assembly to produce machine-washable styles that do not sacrifice comfort. From iconic shoes to versatile bags, our products are designed for every adventure.At Rothy's, we are dedicated to building a sustainable future and believe in creating an inclusive workplace at our headquarters, retail locations, and wholly-owned factory, expanding our community every day.About the Team:Our Digital Experience team is the backbone of Rothy's, ensuring that all technological aspects run smoothly—both for our visually stunning website and internally by providing essential IT support across departments. As a fast-paced, modern organization, technology permeates our operations, and we rely on our talented team to keep everything functioning seamlessly.About the Role:We are seeking a strategic and seasoned Back End Developer Lead (Director level) to build, supervise, and expand our team of developers dedicated to supporting our Product (Merchandising, Allocation & Design), Production, Product Development, Supply Chain, and HR, Legal, and Finance functions. In this influential role, you will define the technical vision across these areas, mentor engineers, and collaborate closely with cross-functional leaders to deliver scalable, high-quality technology solutions. This opportunity is ideal for someone who excels in both hands-on and leadership roles, enjoys team building, solving intricate problems, and making a significant business impact in a dynamic environment.Your Responsibilities:Lead, develop, and mentor a team of developers focused on Product, Production, Product Development, Supply Chain, and corporate functions while fostering a culture of growth, accountability, and technical excellence.Define and implement the technical strategy, architecture, and best practices across systems that support product lifecycle management and business operations.Collaborate with cross-functional teams to ensure the delivery of high-quality technology solutions that drive business objectives.

Join eproinc as a Back-End Database Developer where you'll play a critical role in designing, developing, and maintaining robust database systems. This is an exciting opportunity for a seasoned developer looking to leverage their expertise in a dynamic environment.In this position, you will collaborate with cross-functional teams to ensure data integrity, optimize performance, and contribute to innovative solutions that drive our business forward.

We are seeking a talented Back-End Web Developer to spearhead the management of data interchange between our server and users. Your main responsibilities will include developing robust server-side logic, defining and maintaining our central database, and ensuring high levels of performance and responsiveness to front-end requests. Additionally, you will collaborate closely with front-end developers to seamlessly integrate their elements into the application. A foundational understanding of front-end technologies is essential to excel in this role.

Key Responsibilities:Take a pivotal role in designing and executing our flagship software product.Develop prototypes and iterate on new features that integrate cutting-edge AI technologies.Establish best practices in technology and explore future enhancements for our platform.Mentor current and upcoming members of our engineering team.Analyze high-quality datasets from Fortune 500 companies to generate valuable insights for our clients.

Important NoticeThis is a full-time, on-site position located in San Francisco (Presidio), where you will work in our office five days a week.Candidates must be residents of the Bay Area or willing to relocate prior to starting.We require valid US work authorization, and we are open to sponsoring an O-1 visa for exceptional candidates.Role Overview: Senior Full Stack Engineer (Back-End)Your ResponsibilitiesIn this role, you will develop and deploy full-stack features from backend APIs to the user interfaces that enhance user interactions on a daily basis.As part of a small team of roughly 15, you will not only implement new features but also influence key architectural decisions that will support scaling our system to handle significantly increased loads.You will collaborate closely with our CTO on various initiatives, including:Establishing and managing sandbox environments for agent code execution, ensuring security, resource limits, and process isolation for thousands of concurrent sessions.Designing deployment and migration processes for a Cloudflare Workers and Fly.io architecture, incorporating blue-green deployments and canary testing.Implementing end-to-end instrumentation for real-time workloads, including SSE streaming and task queues.Delivering new backend features, tool integrations, and memory indexing, with immediate impact on real users.Minimizing operational overhead through effective logging, monitoring, and incident response tools tailored for our scale.Your innovative ideas!Technology StackWe leverage a range of technologies including TypeScript, Cloudflare Workers, Durable Objects, Hono, Drizzle ORM, Postgres, Zod, SST, Vercel AI SDK, Docker, React, and Vite.Candidate ProfileEssential QualificationsA minimum of 5 years of engineering experience developing and maintaining backend systems in a production environment, with on-call responsibilities.Proficient in TypeScript with a strong preference for backend development, while also being capable across the entire stack.

We are seeking a passionate Front-end Developer who is eager to blend creativity with technical skills. In this role, you will be responsible for translating UI/UX design wireframes into code, bringing the visual aspects of our applications to life. You will collaborate closely with our UI/UX designers to bridge the gap between aesthetic design and functional implementation, actively contributing to both to define the application's appearance and performance.

Join DoorDash as a Front-End Web Developer specializing in B2B Marketing Technology. In this role, you will collaborate with a passionate team to design and implement innovative web solutions that enhance user experience and drive business growth. Your expertise in front-end technologies will help shape the future of our marketing tools and platforms.

We are seeking a highly skilled and experienced Lead Senior Staff Software Engineer specializing in front-end fundamentals to join our innovative team at The Trade Desk. In this role, you will lead the development of cutting-edge front-end solutions that enhance user experience and drive our product's success. You will collaborate closely with cross-functional teams, guiding junior engineers and fostering a culture of excellence in software development.

Join Our Team as a Front-End Engineer:Are you passionate about anime and eager to create cutting-edge tools for the anime and video game industry? We are looking for a skilled Front-End Engineer to collaborate with our talented team at spellbrush. In this role, you will design and develop sophisticated front-end applications using React and TypeScript, ensuring that our user interfaces are responsive and engaging.Ideal Candidates Will:Embrace the Anime AestheticIf you're an anime enthusiast, you'll have the chance to explore innovative possibilities within the industry. Your love for the genre will drive your creativity as you contribute to our projects.Thrill in Building Complex Single-Page Applications (SPAs)Our applications are interaction-heavy and dynamic, resembling tools like Photoshop and Blender more than standard SaaS applications. A strong desire to explore canvas, WebGL, and possibly WebGPU will set you apart!Possess a Strong Design SenseLarge SPAs come with unique UI/UX challenges. We're in search of someone with a keen eye for design, capable of crafting tasteful UI layouts, seamless user experiences, and engaging microinteractions.Thrive in a Small, Agile Team EnvironmentWith a compact team of three dedicated frontend engineers, you will have the opportunity to work closely with some of the world's leading AI researchers, integrating advanced models into your stunning interfaces. We value the speed and efficiency of in-person collaboration, and we have offices in both Tokyo (downtown Akihabara) and San Francisco. Visa sponsorships are available.

About UsAt Parallel, we are pioneers in web infrastructure, empowering businesses in sales, marketing, insurance, and software development to create state-of-the-art AI agents. Our innovative products grant flexible and robust programmatic access to the web.With a remarkable funding of $130 million from leading investors including Kleiner Perkins, Index Ventures, Spark Capital, Khosla Ventures, First Round, and Terrain, we are on a mission to redefine the web for AI applications. Join our exceptional team of engineers, designers, marketers, and researchers as we embark on this exciting journey.About YouYou are a skilled front-end developer with expertise in modern frameworks and a passion for crafting maintainable and user-friendly interfaces. Your experience includes working with TypeScript, contemporary CSS, Vercel, and headless CMS platforms like Sanity.Your understanding of responsive design, web performance, and accessibility principles is solid. You are adept at reading API documentation, collaborating with backend teams, and creating intuitive developer tools. Familiarity with data visualization or technical documentation is an added advantage.The RoleAs Parallel continues to grow, we seek an experienced front-end development lead to elevate our web properties from their initial versions to outstanding platforms that cater to our expanding customer base.Your primary focus will be on designing, building, and enhancing the web experiences that showcase the capabilities of our powerful APIs. You will concentrate on three key properties:Parallel.ai — our marketing sitePlatform.parallel.ai — our developer dashboard and playgroundDocs.parallel.ai — our technical documentation hubResponsibilitiesOversee web deployment and hosting operations across our digital assetsCollaborate with product and marketing teams to craft engaging web experiences that effectively communicate Parallel's core messages and product featuresWork closely with developer relations and deployed engineers to create demos and documentation that simplify complex technical concepts for developers.

Founded in 2007, Airbnb has transformed the way people travel, connecting over 5 million hosts to more than 2 billion guest arrivals across nearly every country in the world. Our platform allows hosts to offer unique stays and experiences, facilitating authentic connections between guests and local communities.LocationThis position is fully remote and should be based in Mainland China. Note: No Relocation or Visa Support offered.The Community You Will JoinThe Notifications team at Airbnb is focused on crafting and enhancing essential notification systems that ensure smooth and efficient communication for our guests and hosts worldwide. We work closely with product teams to assess notification requirements and deliver scalable solutions. Our goal is to improve engagement, reduce user fatigue, and achieve significant business results through technology and governance.The Difference You Will MakeWe seek backend engineers who are dedicated to building reliable systems that create meaningful user impacts. You will collaborate in a global setting to translate product and engineering concepts into effective production systems. Your contributions will help to develop our notification platform, refine delivery timing, optimize channel selections, and create scalable solutions that support various product teams across Airbnb.A Typical DayWork with engineers and cross-functional partners to clarify requirements, prioritize tasks, and define project scopes within your team’s roadmap.Engage in technical design discussions and align implementation details with team members and partner teams.Create clean, testable, and maintainable code for backend services and platform capabilities.Participate in on-call rotations and enhance operational excellence through improved runbooks, monitoring, and rollback readiness.Diagnose production issues, implement fixes, and enhance system reliability in your areas of responsibility.Guide and mentor junior engineers through code reviews, design discussions, and everyday collaboration.

About UsAt salient, we are pioneering the AI infrastructure that will revolutionize financial operations, starting with the automation of intricate workflows in loan servicing.Supported by top-tier investors like a16z and Y Combinator, we have successfully raised $65 million in Series A funding.Achieving an 8-figure Annual Recurring Revenue (ARR) in under two years, we currently serve over 20% of the auto lending industry, efficiently processing millions of customer calls and transactions daily.Our solutions are fully operational with leading financial institutions, going beyond mere proofs of concept.We are rapidly expanding into new segments of financial services!Embrace our vibrant in-person office culture located in San Francisco, CA.Our team is fully integrated with our clients, managing the entire stack, and moving swiftly to introduce modern AI into regulated sectors where accuracy, consistency, and performance are paramount.About the RoleWe are seeking a dedicated Front-End Software Engineer to create dynamic, user-friendly interfaces that empower users to interact with complex data effectively. You will collaborate closely with product, design, and AI teams to develop elegant user interfaces, define frontend architecture, and deliver features that significantly enhance user experiences at scale.As an early and visible member of a nimble engineering team, you will take ownership of features from inception to delivery, contribute to UI strategy, and help mold the future of our products as we expand our offerings beyond voice.What You’ll DoCraft responsive and high-performance user interfaces utilizing React and TypeScriptSimplify complex workflows into user-friendly product experiencesEngage in cross-functional collaboration with product, design, and AI teams to innovate and iterate quicklyContribute to defining frontend architecture and develop reusable UI componentsCreate data visualizations that clarify and make financial data actionableCollaborate with backend engineers for seamless API and service integrationsDeliver clean, testable, and maintainable code in a rapid release cycleChampion the user perspective in product and engineering discussionsWhat You’ll Bring4+ years of experience in developing production-level front-end applicationsProficient in React and TypeScript, with a solid understanding of modern web technologiesDemonstrated ability to translate complex requirements into user-friendly solutions

Join DepthFirst AI as a Product EngineerAt DepthFirst AI, we recognize software as the cornerstone of modern civilization, yet we are aware of the vulnerabilities that jeopardize its security and resilience. Our mission is to combat these threats through innovative solutions.We are pioneering AI technology that autonomously detects and resolves critical software vulnerabilities. Our advanced security AI agents are designed to discover zero-day vulnerabilities across extensive customer codebases and popular open-source software.Our founding team boasts expertise from leading companies like DeepMind, Databricks, Square, and Faire, and we seek talented individuals eager to explore the crossroads of AI, security, and infrastructure.Your Role:We are looking for an experienced Product Engineer with a focus on front-end development to spearhead the creation of our groundbreaking AI-native platform. This platform autonomously identifies and rectifies software vulnerabilities in code, currently serving a diverse array of large clients. You will play a vital role in shaping the product, understanding user needs, and reinventing security practices for organizations.Responsibilities:Product Development: Design and develop AI-driven products that address significant challenges, helping companies prevent major leaks.Performance Optimization: Own front-end performance and ensure our website exceeds industry standards for speed and responsiveness.Technology Utilization: Utilize Next.js, React, and the latest web development methodologies to build robust, scalable, and high-performance solutions.Impactful Work: Contribute to a product that addresses a critical issue, with large clients already uncovering significant vulnerabilities shortly after implementation.

Join Kiddom as a Senior Front End Software EngineerAt Kiddom, we are revolutionizing education with our innovative platform designed to foster student equity and growth. By integrating high-quality instructional materials with engaging digital learning experiences, we empower schools and districts to take charge of their curriculum. Our platform not only enhances educational outcomes but also provides invaluable data insights for teachers and leaders to refine their instructional strategies and professional development.As a Senior Front End Software Engineer, you will play a key role in crafting impactful product experiences utilized by educators, students, and administrators on a daily basis. Collaborating closely with product managers, designers, and backend developers, you will create scalable and user-friendly front-end systems. This position is perfect for a detail-oriented individual who values craftsmanship and excels in a collaborative, mission-driven environment.

Key Responsibilities:Take charge in designing and implementing our flagship product, ensuring a top-notch user experience.Innovate by prototyping and iterating new feature sets, leveraging cutting-edge AI technologies.Establish technology best practices and conduct research for future platform enhancements.Contribute to the growth of our product team by hiring, mentoring, and fostering talent.Analyze high-quality datasets from Fortune 500 clients to provide actionable insights for our customers.

SentiLink is at the forefront of revolutionizing identity verification in the United States, delivering cutting-edge identity and risk solutions that enable institutions and individuals to transact with confidence. Our mission is to replace outdated and inefficient verification processes with solutions that are ten times faster, smarter, and more accurate.Our success has been remarkable, as we rapidly expand our services beyond financial services into diverse markets, having verified hundreds of millions of identities through our real-time APIs. We are proud to be backed by leading investors like Craft Ventures, Andreessen Horowitz, NYCA, and Max Levchin.Our innovative approach has garnered attention from major media outlets including TechCrunch, CNBC, Bloomberg, Forbes, and Business Insider, and we have consistently earned a spot on the Forbes Fintech 50 list since 2023. Notably, we made history as the first company to go live with the eCBSV and have testified before the United States House of Representatives regarding the future of identity.SentiLink embraces a flexible work environment, supporting fully remote positions as well as in-office opportunities across our locations in Austin, San Francisco, New York City, Seattle, Los Angeles, and Chicago in the U.S., along with Gurugram (Delhi) and Bengaluru in India. We encourage team collaboration and welcome those near our offices to engage in regular office activities. Some roles, like our engineering team in India, operate primarily in-office.Role:We are seeking a dynamic Engineering Manager to spearhead a backend/platform-focused engineering team responsible for driving SentiLink’s core products. This team will oversee the backend systems, external APIs, and services essential for these experiences, establishing a robust technical foundation that ensures our products are scalable, reliable, and secure.You will lead a small yet growing team of engineers focused on building API-driven systems, advancing our platform architecture, and empowering product teams to innovate with speed and confidence.

Why Choose Flux?At Flux, we're redefining the landscape of hardware development by pioneering the world's first AI Hardware Engineer. Our mission is to make cutting-edge hardware design accessible to everyone, transforming the way electronics are conceived and manufactured globally.Role OverviewWe are developing an AI-driven ECAD platform that empowers hardware teams to collaboratively create real, manufacturable electronic components directly in a browser environment. As a Senior Front End Product Engineer, you will play a pivotal role in enhancing the web application experience, focusing on core editor interfaces, collaboration features, and user interfaces designed around AI-powered workflows.Your primary tools will be React and TypeScript, working in close collaboration with design teams and ECAD engineers to ensure our complex, real-time application remains intuitive and efficient for users.We are also open to mid-level candidates who demonstrate significant ownership of similarly intricate products.

At Trunk, our mission is to empower teams to develop high-quality software swiftly. We have partnered with engineering teams at esteemed organizations such as Google X, Zillow, and Brex to identify the root causes of build failures, pinpoint flaky tests, and facilitate faster code delivery without compromising reliability. While AI has accelerated the coding process, the bottleneck has now shifted to issues like merge conflicts, flaky tests, and inconsistent code quality, which can diminish productivity and morale. Engineering teams that focus on designing, implementing, and delivering software will create remarkable, high-quality projects and experience greater job satisfaction.Founded in 2021 by experts from Uber, Google, YouTube, and Microsoft, Trunk has successfully raised a $25 million Series A funding round led by Initialized Capital (Garry Tan) and a16z (Peter Levine), with additional investments from Haystack Ventures, Garage VC, and notable founders from GitHub (Tom Preston-Werner), Apollo GraphQL (Geoff Schmidt), and Algolia (Nicolas Dessaigne).We are seeking an innovative Developer Marketing Lead who thrives in the dynamic environment of early-stage startups. You have experience building marketing pipelines within a tech company and enjoy a diverse array of tasks—from crafting compelling customer success narratives to coordinating engaging events and launching impactful advertising campaigns. As our first marketing hire, you will have the autonomy to lead the entire marketing function. If you are motivated by the prospect of making developers appreciate the tools that enhance their productivity and find joy in witnessing your efforts directly influence revenue growth, this role is designed for you.Your primary strategic goals will be to drive revenue growth and expedite our transition into the enterprise market. The responsibilities listed below reflect our current thinking on how marketing can support these objectives; however, we encourage you to challenge, refine, and adapt these strategies based on your insights and experiences. Achieving the objectives is essential; the path you take to reach them is yours to determine. You will also collaborate closely with our Founders to develop the most effective messaging.

HUD builds infrastructure to support reinforcement learning training data and evaluation, serving advanced AI agents. The team is also developing a marketplace for these resources, working with leading AI labs, Fortune 500 companies, and startups. Backed by $15 million from top investors, HUD is part of Y Combinator's W25 cohort. Role overview This Full-Stack Engineer position emphasizes front-end expertise and user experience. The role involves developing features that span both client and server sides, with a focus on building intuitive, high-quality interfaces for HUD's core products. What you will do Build and launch product features across the stack, ensuring a seamless experience from front-end to back-end. Translate product and design requirements into polished, user-friendly interfaces. Optimize application performance for responsiveness and compatibility across browsers. Develop and maintain backend services and APIs that support key product functions. Work directly with customers to understand workflows and use feedback to improve the product. Requirements Experience owning products end-to-end and working across the stack. Ability to learn new technical concepts quickly, such as through competitive programming or similar challenges. A portfolio of shipped products, side projects, or live demos that highlight front-end skills. Background in early-stage startups and comfort working independently in changing environments. Familiarity with modern AI tools and an understanding of large language models (LLMs). Clear communication skills for remote collaboration across time zones. Bonus experience Exceptional portfolio in UI/UX, interaction design, or creative engineering. Experience with reinforcement learning, post-training, or model training workflows. Knowledge of product analytics tools and experimentation methods such as A/B testing. HUD values technical ability and growth potential over years of experience. Ambitious candidates are encouraged to apply.

Join our dynamic team at Mindlance as a UI Developer. You will play a crucial role in designing and implementing user interfaces that enhance user experience across our innovative web applications. We are looking for creative problem solvers who are passionate about developing intuitive and responsive designs.