Lead Senior Staff Software Engineer - Front End Fundamentals

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 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.

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

The Trade Desk is looking for a Senior Front End Software Engineer to join the Deal Desk team. This group builds web interfaces that support the company’s products and works on projects that require both creativity and strong technical skills. Collaboration is central to the team’s approach, with engineers, designers, and product managers working together to solve challenges and improve the product. What you will do Design and build user interfaces for Deal Desk products using current front-end frameworks and tools Collaborate with engineers, designers, and product managers to deliver features that enhance the user experience Take part in shaping the direction and architecture of web applications Maintain high standards for code quality and reliability through solid engineering practices Locations This position is available in Irvine, New York, San Francisco, San Jose, and Ventura.

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.

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.

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.

Join Checkr as an Engineering Manager for our Front End team, where you will lead a talented group of engineers in building innovative solutions that enhance our platform. You will play a pivotal role in shaping the user experience and driving the technical vision for our web applications. If you are passionate about technology, team leadership, and making a meaningful impact, we want to hear from you!

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.

OpenAI seeks a Silicon Implementation Engineer specializing in Front End design, based in San Francisco. This role centers on developing advanced silicon solutions that underpin the company’s artificial intelligence initiatives. The position involves close collaboration with fellow engineers to push forward hardware technologies. Key responsibilities Work with engineering teams to design and implement front end silicon components Use technical knowledge to support the advancement of OpenAI’s hardware Contribute to projects that influence the direction of AI hardware development

Join Fundamental as a Forward Deployed Full-Stack EngineerAt Fundamental, we are at the forefront of redefining enterprise decision-making through artificial intelligence. Founded by alumni from DeepMind, we have created NEXUS, the world’s most advanced Large Tabular Model (LTM), tailored specifically for the structured records that underpin crucial business decisions. Supported by elite investors and relied upon by Fortune 100 companies, we are unlocking trillions in value by empowering organizations with the Power to Predict.As a Forward Deployed Full-Stack Engineer, you will tackle groundbreaking technical challenges in model deployment and contribute to technology that reshapes decision-making for major companies globally. This role is your opportunity to be part of a pioneering organization right from its inception and help shape the future of enterprise AI.Your Role and ResponsibilitiesWe are looking for a Forward Deployed Full-Stack Engineer to develop critical integration layers and interfaces that facilitate the adoption of NEXUS by our clients.In this pivotal role within our FDE team, you will drive the successful implementation of our products. While our machine learning engineers concentrate on enhancing model performance, your focus will be on ensuring usability, seamless integration, and system reliability. You will collaborate closely with clients from the Proof of Value phase through to post-implementation, guaranteeing that our solutions are not only precise but also user-friendly, secure, and smoothly integrated into their existing workflows.In this position, you will manage technical relationships with various stakeholders including IT security, application owners, and business users, serving as a vital bridge that translates client needs into features for our platform roadmap.Key ResponsibilitiesArchitect and build production-grade applications that enhance our core models, transforming projects into intuitive, high-value user experiences.Lead engineering efforts for last-mile implementation, managing API integrations, data visualizations, and security requirements (SSO, RBAC) in complex enterprise settings (VPC, on-prem, air-gapped).Design and implement efficient backend services that process customer data and deliver model predictions at scale, ensuring low latency and high availability.Collaborate with research and product teams to convert operational challenges—such as data ingestion issues or UI gaps—into key insights for the Fundamental roadmap.

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.

Join Waymo, a leader in autonomous driving technology, as a Staff Software Engineer / Technical Lead Manager. In this pivotal role, you will guide a dedicated team of engineers to innovate and enhance software solutions that power our self-driving vehicles. Your expertise will drive technical direction and foster a collaborative environment, ensuring that our projects meet the highest standards of quality and efficiency.

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.

At Crusoe, we are dedicated to accelerating the abundance of energy and intelligence. As a pioneering AI infrastructure company, we control every aspect of our operations — from energy generation to the digital tokens that power the world’s most ambitious AI workloads. Joining Crusoe means being part of a team that is shaping the future at an unprecedented pace.We are amid a transformative industrial revolution. The endless demand for AI computing power poses significant challenges, particularly concerning energy supply. Our energy-first strategy not only enhances AI infrastructure but also contributes positively to the environment, empowering innovators in the AI sector.We seek proactive, problem-solving team members who recognize the scale of our mission and are eager to navigate uncharted territories. If you aspire to advance your career alongside experts in energy, manufacturing, data center construction, and cloud services, we invite you to become part of our dynamic team.If you are ready to engage in the most impactful work of your career, assist our customers and partners in elevating their AI strategies, and contribute to a high-performing, supportive team, we welcome you to build the future with us at Crusoe.About This RoleThe Cloud Storage team at Crusoe is searching for a Senior Staff Software Engineer to act as the principal architect for our storage strategy. Unlike a Staff Engineer who leads feature development, a Senior Staff Engineer will define the long-term technical roadmap essential for our AI-scale infrastructure. You will play a crucial role in establishing the architectural strategy, ensuring the integrity and global scalability of our specialized storage services. Your work will focus on the underlying physics of the stack, bridging high-performance NVMe hardware with globally distributed object storage solutions that compete with S3.Your ResponsibilitiesArchitectural Vision & Strategy: Lead the development and execution of the long-term technical strategy for Crusoe's storage engine, while identifying and integrating industry trends such as CXL and NVMe-oF into a unified roadmap.System Programming Expertise: Utilize your extensive experience in system programming with languages such as C, C++, Go, and Rust to lay the groundwork for our V2 storage re-architecture.Storage Protocols: Design and implement solutions employing industry-standard storage protocols, including NFS, SMB, iSCSI, and NVMe/TCP.

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.

Checkr, Inc. is looking for a Senior Staff Software Engineer in San Francisco, California. This position centers on designing and building software that supports the company's mission to transform the background check industry. Role overview This role involves tackling complex engineering challenges and developing solutions that have a direct impact on Checkr's products. Projects will focus on creating and improving software applications that serve a wide range of users and use cases. Collaboration Senior Staff Software Engineers at Checkr work closely with colleagues from different departments. Expect to partner with cross-functional teams to ensure software meets technical and business needs. What you will do Build and maintain software applications that support Checkr's core services Address challenging problems with thoughtful, scalable solutions Work collaboratively with teams across engineering, product, and other functions

Waymo is at the forefront of autonomous driving technology, dedicated to becoming the most trusted driver globally. Originating from the Google Self-Driving Car Project in 2009, our primary goal has been to develop the Waymo Driver—The World’s Most Experienced Driver™. Our innovations aim to enhance mobility access while saving countless lives lost to traffic accidents. The Waymo Driver powers our fully autonomous ride-hail services and is adaptable across various vehicle platforms and product applications. Having completed over ten million rider-only trips, our technology has autonomously navigated over 100 million miles on public roads and executed tens of billions of miles in simulations across more than 15 U.S. states.Your Role:Lead the technical strategy for the Simulator’s issue response lifecycle, encompassing automated detection, root cause analysis, and the deployment of both temporary and permanent software solutions to prevent future regressions.Direct complex, cross-functional projects to enhance automated issue detection by integrating new data sources and signals, thus reducing the time from an in-field event to mitigation deployment.Work closely with Data Science, Systems Engineering, and operations teams to improve technical processes and tools, accelerating the deployment and validation of solutions for identified issues.Mentor mid-level and junior engineers on sophisticated technical challenges, best practices in system architecture, and high-quality software development, serving as a technical force multiplier.

Join Front, the premier AI-driven customer service platform designed for seamless collaboration. Our innovative workspace integrates essential support channels, allowing teams to work together on requests, automate tedious tasks, and provide exceptional customer experiences throughout every interaction. With advanced workflows, AI capabilities, and customer insights, we empower organizations to prioritize their customers daily. Trusted by over 9,000 forward-thinking companies, including CultureAmp, HootSuite, and Y Combinator, Front is dedicated to delivering outstanding service at scale.Supported by renowned investors like Sequoia Capital and Salesforce Ventures, Front has successfully raised $204M from top-tier venture capitalists and industry leaders from companies such as Atlassian, Okta, Qualtrics, Zoom, and PagerDuty. We take pride in being recognized as one of the best workplaces, earning accolades such as Built In's 100 Best Midsize Places to Work in SF 2025, Top Places to Work by USA Today 2025, Y Combinator's list of Top Companies in 2023, and #4 on Fortune’s Best Workplaces in the Bay Area™.We are actively seeking talented engineers to join our Foundations team. This dedicated group is responsible for constructing the frameworks and systems that support our customer-facing functionalities. By developing shared libraries, frameworks, and tooling, they ensure that the infrastructure upon which we build Front is both scalable and dependable.

Join our innovative engineering team at Twitter Inc. as a Senior Staff Software Engineer. We are looking for talented individuals who are eager to tackle complex challenges and contribute to the development of cutting-edge technology. In this role, you will lead projects, mentor junior engineers, and collaborate with cross-functional teams to enhance our platform.