Senior React Developer Jobs

Instawork is on a mission to create meaningful economic opportunities for skilled hourly professionals in communities around the globe. Our AI-powered labor marketplace helps local businesses scale, and enables global technology companies to push the frontiers of robotics and AI. Backed by world-class investors like Benchmark, Spark Capital, Craft Ventures, Greylock, Y Combinator, and others, we’re looking for exceptional talent to reimagine the way the world works. We are seeking a Senior Software Engineer to contribute to the development of next-generation products as a key team member driving impactful features from concept to production. You will collaborate across engineering, product, and design to translate business requirements into clear, scalable technical solutions, leveraging modern methodologies—including AI where it aligns with product scope—to deliver high-quality products and efficient software workflows. You are someone who thrives in ambiguous problem spaces, has strong product instincts, and can translate customer needs into technical solutions that drive business outcomes. Who You Are: 5+ years of professional experience with a focus on high-growth product environments Strong coding and architectural proficiency—you prioritize moving quickly down the right path to ship reliable code daily Full-stack proficiency—comfortable across backend services, APIs, and modern frontends (React, Angular, or Vue.js) Strong product instincts—you translate customer needs into technical solutions that drive business outcomes AI-First mindset—expertly using AI coding tools to accelerate delivery without compromising architectural integrity Agile execution—you understand the lifecycle of a feature from local branch to production monitoring Nice to Have Fluency in our core stack (Django, Python, React, and React Native)—accelerates time-to-impact and onboarding Experience with advanced deployment patterns—leveraging feature flags, config-driven behavior, and progress

Who We Are HP IQ is HP’s new AI innovation lab. Combining startup agility with HP’s global scale, we’re building intelligent technologies that redefine how the world works, creates, and collaborates. We’re assembling a diverse, world-class team—engineers, designers, researchers, and product minds—focused on creating an intelligent ecosystem across HP’s portfolio. Together, we’re developing intuitive, adaptive solutions that spark creativity, boost productivity, and make collaboration seamless. We create breakthrough solutions that make complex tasks feel effortless, teamwork more natural, and ideas more impactful—always with a human-centric mindset. By embedding AI advancements into every HP product and service, we’re expanding what’s possible for individuals, organisations, and the future of work. Join us as we reinvent work, so people everywhere can do their best work. About The Role The IQ Design team is dedicated to creating simple, delightful, and transformative user experiences. We’re passionate about developing innovative yet familiar interfaces that feel like natural extensions of the human experience. We value collaboration across disciplines—from software engineering to hardware design—and we’re excited to work with designers who see technology as a tool to help people tackle real-world problems. As a Senior Digital Product Designer, you’ll imagine, design, prototype, and ship compelling new AI experiences. The ideal candidate brings intense curiosity, a dedication to craft, a willingness to learn, and an openness to sharing and evolving ideas. You love experimenting, engaging deeply in the design process, and iterating continuously on concepts until they feel “just right” (and even then, you keep exploring ways to improve). At HP IQ, you’ll have the opportunity to develop features and products that people love using every day. What You Might Do Explore, design, and ship new experiences powered by AI Collaborate with fellow designers and engineers to refin

At Linear, we're building the product development system for teams and agents. AI is fundamentally changing how software gets built, and we’re shaping the tools this new era requires. Founded in 2019, Linear has become the platform of choice for more than 40,000 companies (including OpenAI, Coinbase, and Ramp) to plan, build, and ship their products. Today, our team is distributed across North America, Europe, and Australia, and we’re continuing to grow internationally. What unites us is relentless focus, fast execution, and a deep care for software craftsmanship. As a small team, we’re all generalists and constantly picking up new challenges. When it comes to code, we’re looking to work with experienced people who can pick a problem and solve it. We use TypeScript and build scalable systems so we can continuously make progress on a solid foundation. We don’t expect you to have a background in everything we use, but we do expect strong JavaScript fundamentals and a background working with React and TypeScript. Location & work mode Linear is a remote-first company, with optional co-working offices in San Francisco, New York, and London. This role is open to candidates based in North America and Europe. You can work from most timezones within these regions. We value deep focus and async collaboration, with intentional moments to connect in person through team off-sites, optional co-working, and occasional travel. What you'll do Build new user-facing features with everything from database models to GraphQL resolvers and UI components Optimize our data synchronization stack by applying better serialization protocols Add real-time collaborative editing to our content editor Improve performance by profiling and tweaking virtualized list rendering Add analytics, monitoring, and alerts to our service so that we can better respond to operational incidents Open-source any non-trivial innovations that come out of our work on the product Redefine best-in-class software deve

Who We Are Verkada is transforming how organizations protect their people and places with an integrated, privacy-sensitive AI-powered platform that includes solutions for video security, access control, air quality sensors, alarms, intercoms, and visitor management. We’ve got serious momentum in the market: more than 30,000 customers (including 100+ of the Fortune 500), a $5.8B valuation , more than $1 billion in annualized bookings, and backing from CapitalG, Sequoia Capital, General Catalyst, Felicis Ventures, Next47 and more. Physical AI is one of the most consequential technology shifts of our time, and Verkada is at the center of it. You can look at all kinds of communities to see our platform’s impact in the world. It's the retailer that uses our agentic AI to deter theft before it happens. The warehouse that uses AI-powered alerts to make sure its team is protected on the floor with proper PPE. The school that’s alerted to a threat in real-time and triggers a lockdown in seconds, not minutes. We’re rapidly scaling this impact: today, more than 2 million Verkada devices are deployed across 170+ countries. About the Role We are a small, dynamic team focused on building cloud-managed access control systems. Access Control is our second major product line. Our Access Control solution allows users to manage their doors, schedules, and user credentials from virtually anywhere on their laptop or phone. We consider our team a startup within a startup, with a fair amount of ownership and autonomy. You’ll be working alongside a dynamic team of firmware, backend, and frontend engineers to develop this product line. What You'll Do Excited by new products and startups You think about delivering best-in-class products and experiences - not features You can take a less-than-fully-fleshed-out product idea and drive it to completion What You Bring 7+ years of industry software engineering experience Mastery of JavaScript: Scoping, closures, contexts, prototypes, c

At Affirm, we exist for the moments that matter—giving people a clear, predictable way to pay over time, with no hidden fees, no surprises, and no tradeoffs on what matters most. The Marketplace and App Experience domain is the main pillar of our core consumer strategy, driving the user journey across all of our frontend surfaces: Mobile and Web. The teams span across multiple products and areas to engage and provide value to our customers, starting with the Home hub in the app or website, which expands into the various product offers and journeys a user can embark on with Affirm. This role will be at the forefront of our front-end facing cross-team projects, working closely with other teams and engineers across our mobile and web technologies, while also evolving and collaborating with every product experience team at Affirm. What You'll Do With the support of your team’s tech lead and manager, you will break down larger projects into individual tasks, deliver them in multiple phases, and collaborate with others to ensure timely delivery of your work. You will support your peers and stakeholders in the product development lifecycle by collaborating with product management, design & analytics by participating in ideation, articulating technical constraints, and partnering on decisions that properly consider risks and trade-offs. You will support the operations and availability of your team’s artifacts by creating and monitoring metrics, escalating when needed, and supporting “keep the lights on” & on-call efforts. You will contribute to a sense of community on your team by engaging in growth and development activities such as participation in the interview process. What We Look For You have a total of 4+ years of experience as a software engineer. You have experience shipping web apps using declarative UI frameworks like React or Vue You have experience shipping mobile apps using native or cross-platform languages like React Native You have experience design

At Affirm, we exist for the moments that matter—giving people a clear, predictable way to pay over time, with no hidden fees, no surprises, and no tradeoffs on what matters most. The Marketplace and App Experience domain is the main pillar of our core consumer strategy, driving the user journey across all of our frontend surfaces: Mobile and Web. The teams span across multiple products and areas to engage and provide value to our customers, starting with the Home hub in the app or website, which expands into the various product offers and journeys a user can embark on with Affirm. This role will be at the forefront of our front-end facing cross-team projects, working closely with other teams and engineers across our mobile and web technologies, while also evolving and collaborating with every product experience team at Affirm. What You'll Do With the support of your team’s tech lead and manager, you will break down larger projects into individual tasks, deliver them in multiple phases, and collaborate with others to ensure timely delivery of your work. You will support your peers and stakeholders in the product development lifecycle by collaborating with product management, design & analytics by participating in ideation, articulating technical constraints, and partnering on decisions that properly consider risks and trade-offs. You will support the operations and availability of your team’s artifacts by creating and monitoring metrics, escalating when needed, and supporting “keep the lights on” & on-call efforts. You will contribute to a sense of community on your team by engaging in growth and development activities such as participation in the interview process. What We Look For You have a total of 4+ years of experience as a software engineer. You have experience shipping web apps using declarative UI frameworks like React or Vue You have experience shipping mobile apps using native or cross-platform languages like React Native You have experience design

Toast creates technology to help restaurants and local businesses succeed in a digital world, helping business owners operate, increase sales, engage customers, and keep employees happy. At Toast, the IQ Grow team is on a mission to scale new, high-impact go-to-market initiatives. By combining the cutting-edge innovation of AI agentic solutions with human-in-the-loop workflows and touchpoints, we are redefining how restaurants connect with their guests. Our goal is to deliver a truly personalized marketing experience that empowers Toast customers to build lasting relationships, drive engagement and grow their businesses. If you're excited about pioneering at the intersection of advanced AI and human-centered design to make a real-world impact, we’d love to have you on the team! You will be a key part of a high-impact, high-ownership engineering team solving complex challenges in a fast-moving product space. Your engineering leadership will be balancing technical excellence alongside a strong product mindset to solve for continuous growth within both the team and our product space. A day in the life (Responsibilities) Design, build and maintain high performing, flexible, and scalable solutions that help restaurants deliver a best-in-class guest experience Ship features end-to-end, from design through rollout, monitoring for success and iterating based on real-world use Be an awesome teammate who's all in on collaboration and collective success Collaborate closely with Product, Design and Engineering stakeholders Leverage cutting edge AI tools to enhance your development workflow, improve velocity, and help pioneer new approaches to building - contributing to a culture of innovation and productivity across the team. Mentor less experienced engineers and up-level the team through design reviews, constructive feedback, and agent-assisted engineering practices What you'll need to thrive (Requirements) 5+ years of backend/full-stack experience, delivering products that dr

Toast is building the restaurant platform that helps restaurants adapt, take control, and get back to what they do best: running the businesses they love. We’ve grown into a leading hospitality software company in the U.S., and are now entering our next phase of growth - one defined by scale, complexity, and a new class of enterprise customers. Toast is looking for a Senior Software Engineer to join our Toast Connect team in Dublin. The Connect team owns how everything outside Toast connects to Toast including the event infrastructure every team at Toast uses to publish data, the frameworks partners and customers use to integrate through our APIs, and a new charter to make Toast the source of truth for all the data about the customers we serve. You will play a key role in evolving our platform to support ever more complex new features and best-in-class monitoring as we scale to orders of magnitude of our current size! If you want to help create something tangible that is used every day, help businesses achieve their vision, and take on the challenge of scaling a SaaS product, Toast is the place for you. A day in the life (Responsibilities) Design, build, deploy, and maintain scalable backend microservices and RESTful APIs using Java / Kotlin and AWS infrastructure. Lead complex projects that may span multiple teams & systems. Champion best practices such quality automated testing and phased rollouts to ensure zero-regression releases and high test coverage. Monitor service health for success & failure, analyze logs and metrics (Datadog/CloudWatch), and participate in on-call rotations to maintain platform uptime. Collaborate with peer engineers, provide design feedback, and participate in code reviews. Collaborate with PM & UX on the development of new features & products. Mentor & coach your peer engineers. Use AI tooling as a genuine part of your workflow, not an afterthought What you'll need to thrive (Requirements) 5+ years professional

Secure Every Identity, from AI to Human Identity is the key to unlocking the potential of AI. Okta secures AI by building the trusted, neutral infrastructure that enables organizations to safely embrace this new era. This work requires a relentless drive to solve complex challenges with real-world stakes. We are looking for builders and owners who operate with speed and urgency and execute with excellence. This is an opportunity to do career-defining work. We're all in on this mission. If you are too, let's talk. Java Senior Software Engineer, Azure Integrations Team We are looking for dynamic and collaborative software engineers to join the Azure Integrations team that focuses on integrations with Microsoft's Azure AD Identity Platform (Entra ID, MSGraph, etc). This is a hybrid role based out of our Bangalore office. The Senior Software Engineer Opportunity We are looking for experienced engineers that are passionate about building large-scale, mission-critical software in a fast-paced agile environment. The ideal candidate will share our passion and pride in the simple elegance and usability of our solution and will join an engineering team that strongly believes in automated testing and an iterative process to build high-quality next generation enterprise software. What you’ll be doing Understand our Azure Integrations codebase and development process: Jira, Technical Designs, Code Review, Testing, and Deployment. Analyze, refine and shape requirements with product management and other stakeholders by asking the right questions and driving clarity. Provide support and handle incoming bugs and customer reported issues Work with various stakeholders to scope and plan engineering efforts to ensure project and feature launch success. Design and implement high-performance distributed scalable and fault-tolerant software components. Actively participate in PR reviews with the team Help mentor more junior team members Enjoy working across a cross

Omada Health is on a mission to bend the curve of chronic disease. Job Overview: We are hiring a Senior Engineering Manager to own a significant piece of Omada's Member-facing surface. You own what gets built, in what order, and how the people building it grow. A squad owns problems from prototype to production, including the maintenance and the on-call rotation for what it ships. At this level you own more than one, which means the hardest calls you make are the ones about where capacity goes when two good things want it at the same time. You stay technical. You are in the codebase and in the same agent workflows your builders use, close enough to review architecture, catch a weak design, and be useful in an incident. Where you manage directly, you ship production work off the critical path. Where you manage through someone else, that person's growth is your work product. You partner with Product Strategists who spend their time in front of members, coaches, and stakeholders, and who prototype to test ideas quickly. They own what gets built and why. You own whether it can be delivered, at what cost, and by when, and you are senior enough that your answer shapes the roadmap rather than just responding to it. About you: You are comfortable being accountable for what your squads ship. You still write code, and you want to. This role ships production work off the critical path, in the same codebase and the same agent workflows as your squads, so you feel the friction your people feel first-hand. You have a point of view on where AI-assisted development helps and where it creates rework, and it comes from changing how a real team works, not from reading about it. You have done the engineering manager job well enough that you can teach it. Whether or not you have carried the title of manager-of-managers, you have grown someone into leading, and you know the difference between doing the work for them and raising their ceiling. Your first team is your peer group, not your

Our Purpose Mastercard powers economies and empowers people in 200+ countries and territories worldwide. Together with our customers, we’re helping build a sustainable economy where everyone can prosper. We support a wide range of digital payments choices, making transactions secure, simple, smart and accessible. Our technology and innovation, partnerships and networks combine to deliver a unique set of products and services that help people, businesses and governments realize their greatest potential. Title and Summary Senior Software Engineer Overview Interested in building the next generation platform that empowers end-to-end marketing campaign management inclusive of audience targeting, campaign execution, and measurement? Our platforms operate at global scale, enabling organizations across markets worldwide to leverage data-driven marketing capabilities. The overarching goal of data-driven marketing is to deliver the right content, to the right person, at the right time. The Marketing Services (MS) Technology team is looking for a Senior Software Development Engineer to provide technical ownership, with an emphasis on engineering efficiency, innovation, and on-time delivery. The ideal candidate is passionate about building highly scalable, cloud-native platforms using modern software engineering and data technologies. You will have the opportunity to work across technologies including Java, Spring Boot, React, GraphQL, Databricks, AWS, Spark, Hadoop, event-driven architectures, and real-time data platforms. Our teams leverage GenAI and Agentic AI capabilities throughout the product development lifecycle to accelerate delivery, improve quality, enhance automation, and increase engineering productivity. This role offers an opportunity to help shape Mastercard's ongoing cloud transformation journey while transform

Toast creates technology to help restaurants and local businesses succeed in a digital world, helping business owners operate, increase sales, engage customers, and keep employees happy. International expansion is a critical growth engine for Toast's future. Outside the US, we currently operate in Canada, UK, Ireland, and Australia and are actively growing our product platform in these markets. As we gain market share, we are increasing our upmarket product investment into Mid Market (MM). Our goal is to be able to win and retain larger and more complex restaurant and hospitality operators. As part of this team’s mission you will get close to customers to fully understand the nuances of each of their unique needs, to ensure your contributions are making a meaningful impact to their business. As a Senior Engineer you will be responsible for delivering these features from start to finish, ensuring code quality, high technical architectural standards and high quality products. A day in the life (Responsibilities) Design, build and maintain high performing, flexible, and scalable solutions that help restaurants operate their business effectively Ship features end-to-end, from design through rollout, monitoring for success and iterating based on real-world use Be an awesome teammate who's all in on collaboration and collective success Collaborate closely with Product, Design and Engineering stakeholders Leverage cutting edge AI tools to enhance your development workflow, improve velocity, and help pioneer new approaches to building - contributing to a culture of innovation and productivity across the team. Mentor less experienced engineers and up-level the team through design reviews, constructive feedback, and agent-assisted engineering practices What you'll need to thrive (Requirements) 5+ years of backend/full-stack experience, delivering products that drive impact Ability to read and integrate with frontend applications; showing curiosity to work a

At Lyft, our purpose is to serve and connect. We aim to achieve this by cultivating a work environment where all team members belong and have the opportunity to thrive. The Risk Tech engineering organization is committed to tangibly reducing accident frequency, saving lives, and managing costs to enhance the safety and affordability of rides. Claim Management is a core financial function for Lyft. Each claim touches complex workflows, multiple stakeholders, sensitive data, financial reserves, regulatory processes, and significant financial liabilities. This role offers the opportunity to define a leading claims management system for the industry. Our vision is to establish a single, Unified Risk Platform where comprehensive claims workflows across all business lines are efficiently administered, communications are consolidated, and data is structured to facilitate data-driven insights and decisions. This enables cost-efficient claims operations, mitigates risks and expenses as Lyft scales, and ensures people receive assistance proactively and accurately. We are seeking a Senior Software Engineer to contribute to the technical direction, drive architectural decisions, and lead the development of a highly reliable, scalable, and intelligent Risk Management Information System that powers our insurance platform. You will collaborate with passionate colleagues from Engineering, Data Science, Product and Claim Operations to deliver end-to-end solutions. Responsibilities: Define and drive the long-term technical roadmap for claims management systems, aligning priorities with Product, Claim Operations, Data Science, and other stakeholders. Provide architectural leadership, make informed design tradeoffs, and guide strategic decisions across multiple engineering teams. Understand claim handling workflows, identify bottlenecks and multiply their productivity by driving platform innovations and resolving pain points with AI automation solutions Deliver scalable, reliable

At Lyft, our purpose is to serve and connect. We aim to achieve this by cultivating a work environment where all team members belong and have the opportunity to thrive. The Risk Tech engineering organization is committed to tangibly reducing accident frequency, saving lives, and managing costs to enhance the safety and affordability of rides. Claim Management is a core financial function for Lyft. Each claim touches complex workflows, multiple stakeholders, sensitive data, financial reserves, regulatory processes, and significant financial liabilities. This role offers the opportunity to define a leading claims management system for the industry. Our vision is to establish a single, Unified Risk Platform where comprehensive claims workflows across all business lines are efficiently administered, communications are consolidated, and data is structured to facilitate data-driven insights and decisions. This enables cost-efficient claims operations, mitigates risks and expenses as Lyft scales, and ensures people receive assistance proactively and accurately. We are seeking a Senior Software Engineer to contribute to the technical direction, drive architectural decisions, and lead the development of a highly reliable, scalable, and intelligent Risk Management Information System that powers our insurance platform. You will collaborate with passionate colleagues from Engineering, Data Science, Product and Claim Operations to deliver end-to-end solutions. Responsibilities: Define and drive the long-term technical roadmap for claims management systems, aligning priorities with Product, Claim Operations, Data Science, and other stakeholders. Provide architectural leadership, make informed design tradeoffs, and guide strategic decisions across multiple engineering teams. Understand claim handling workflows, identify bottlenecks and multiply their productivity by driving platform innovations and resolving pain points with AI automation solutions Deliver scalable, reliable

Secure Every Identity, from AI to Human Identity is the key to unlocking the potential of AI. Okta secures AI by building the trusted, neutral infrastructure that enables organizations to safely embrace this new era. This work requires a relentless drive to solve complex challenges with real-world stakes. We are looking for builders and owners who operate with speed and urgency and execute with excellence. This is an opportunity to do career-defining work. We're all in on this mission. If you are too, let's talk. Senior Software Engineer, Device Identity Secure Every Identity, from AI to Human Identity is the key to unlocking the potential of AI. Okta secures AI by building the trusted, neutral infrastructure that enables organizations to safely embrace this new era. This work requires a relentless drive to solve complex challenges with real-world stakes. We are looking for builders and owners who operate with speed and urgency and execute with excellence. This is an opportunity to do career-defining work. We're all in on this mission. If you are, too, let's talk. Device Identity and Access Organization The Device Identity and Access organization is at the forefront of Okta’s Zero Trust vision. As a foundational pillar within Okta Research and Development (ORD), our mission is to transform the device itself into a secure, trusted, and effortless identity factor. We are the teams responsible for ensuring users can seamlessly interact with their work from any endpoint, anywhere in the world. We engineer the end-to-end device experience—from our flagship FastPass , Okta Device Access (ODA), and Device Assurance . Our teams own the continuous authentication pipeline, device lifecycle management, and the sophisticated cloud services that analyze real-time trust and assurance signals to make frictionless, passwordless access a reality across Windows, macOS, iOS, Linux and Android. Our organization is comprised of engineers who thrive at the intersectio