<h2>The company</h2>MUI's story began in 2014 with Material&nbsp;UI, the most successful React implementation of Google's Material Design. Today, Material&nbsp;UI stands as one of the most popular open-source libraries on GitHub and has paved the way for the fully-fledged startup known as MUI (founded in 2019), which now boasts an ever-expanding ecosystem of React UI products. We're a company of 35+ people as of early 2024, and we're growing.<h2>The products</h2>MUI is best known for our flagship product, Material&nbsp;UI—but this is just one of three core component libraries we maintain. Base&nbsp;UI is our headless component library, and Pigment&nbsp;CSS is a zero-runtime CSS-in-JS styling engine. We also host Design Kits and pre-built Templates.Beyond the core libraries, MUI&nbsp;X offers advanced components like the Data Grid, Date and Time Pickers, and Charts, for more complex user interactions and data visualization needs.We're also making ambitious moves to incorporate our full suite of components into Toolpad, a low-code admin builder tool for assembling full-stack apps faster than ever.Learn more about MUI's products in this blog post: An introduction to the MUI ecosystem.<h2>The culture</h2>MUI is a fully remote company with a team that spans the globe. The majority of our work is asynchronous, and we rely on written communication to collaborate. We're radically transparent: nearly all of our work happens in public. Each contributor has the freedom to decide how and when they work, and that work is primarily self-directed: it's your responsibility to define and complete your own tasks in a timely manner.For additional details about the culture, you can check our careers and about pages and also our public Handbook.<h2>Why we're hiring</h2>We need help to continue to improve the health of the open-source product: make the advanced components easier to use, make it support more use cases, improve performance, make it more accessible, increase the contributions by engaging and collaborating with the community, guide developers to answers, and just generally be a positive presence in the open-source community.Overall, both our open-source community and our premium products are growing fast. We need talented people to keep up with the demands of our exigent community!<h3>Why this is interesting</h3>The advanced components portfolio is still small, with a million interesting and challenging problems to solve.Our products empower React developers to build awesome applications faster – we see millions of developers on MUI's docs every year, one million a month.<h2>The role</h2><h3>Key responsibilities</h3>Depending on the day, you'll:<ul><li>Help guide architectural decisions. The future of MUI is discussed and planned in our public RFCs and issues. You'll be helping drive these conversations and guiding MUI toward the best possible solutions.</li><li>Contribute to deep, meaningful refactors and feature releases. MUI is a complex codebase. Components we've shipped recently, such as the data grid and date pickers have required months of dedicated, careful work.</li><li>Reduce friction. A large amount of the work on MUI is reducing friction and making it easier to use. This might involve careful API design, identifying and fixing top bugs, creating easier-to-understand error messages, and writing documentation and blog posts about features you ship.</li><li>Collaborate with the community. Many small, as well as meaningful fixes and features, have been contributed by the community. Your role is to draw the best out of the community — to inspire those across the world to create and contribute through your reviews of their issues and pull requests.</li><li>Experiment and play. Great, unexpected features and heisenbug fixes have come from a number of sources — relentlessly methodical processes of elimination, free-flowing team collaboration, inspiration by adjacent libraries and projects, and difficult-to-explain individual strokes of brilliance. Whatever your preferred style is for creating new things that others might not have thought of, you'll find a welcome home on the team.</li><li>Take ownership of features from idea/mockup to live deployment. You'll shape and guide the direction of crucial new features, including new components.</li><li>Ship. Early and often. You'll iterate and ship frequently. You'll have a real impact on the end-user experience and you'll love working on a team that builds stunning UIs and prioritizes delivering real user value as often as possible.</li><li>You'll be interacting with the users on a regular basis, handling inbound support and feature requests (every developer helps with developer requests).</li></ul><h3>The best parts of this job</h3><ul><li>You'll be at the cutting edge of application development — working on one of the fastest-growing UI libraries on the market.</li><li>You'll be part of an active, open, friendly community of developers that are excited about building awesome applications.</li><li>Your role will be key to making MUI the go-to UI solution for building applications, websites, and design systems with React.</li></ul><h3>The worst parts of this job</h3><ul><li>Shifting context. You will necessarily have to shift context and dive into a different feature before the current one is done. It may even be in an area of the codebase you're unfamiliar with or don't have a ton of understanding about. It's fun, rewarding work, but it can be very challenging.</li><li>We move quickly but don't sacrifice quality. We ship early, often, and quickly. You may not be initially comfortable with the cadence with which we ship high-quality features and improvements to end-users. By doing so, we sacrifice on solving each problem 100% in exchange for fast feedback. Solving 50-70% of the issue with quality should be enough for any given iteration. Our users quickly tell us when we haven't pushed a solution far enough.</li><li>MUI has a large codebase. You may bang your head against the wall at times, and then write tests to assist future you 😌. The work you will be doing is somewhat unique and idiosyncratic. You probably have not had a similar role before.</li><li>In open-source, you're faced with a nonstop stream of bug reports and support requests. That means you need to develop an intuition for when to ignore something, and when to dig in further.</li></ul><h2>Who we're looking for</h2>We're looking for someone with strong front-end skills. More important than specific technical skills though is that you're a strong problem solver who loves to learn. Details matter to you.<h3>Required</h3><ul><li>Expertise in the modern JavaScript ecosystem. MUI's open-source projects are built on the shoulders of giants, making use of technologies such as ES2021, TypeScript, Node.js, React, Next.js, webpack, and Babel.</li><li>A track record of demonstrating an eye for product and solving real-world user problems. If you have a knack for solving problems at the root cause, shipping beautiful user interfaces and intuitive APIs, we want you on our team.</li><li>Experience building and shipping production code in a team setting with a passion for writing tested, performant, and high-quality code.</li><li>Strong written and verbal communication skills. As part of the team, you'll interface both directly and indirectly with community members and enterprise customers, and contribute to user documentation. Clear communication is fundamental in creating intuitive and compelling resources.</li><li>Ability to dive into complex problems. You should be able to quickly assess, understand, and iterate upon aspects of our codebase.</li><li>Ready and willing to ask and answer questions. If you're comfortable saying you're unsure, asking for help; but equally reaching out to assist others, you'll be an incredible addition to our team. We thrive because of continuous learning. First-time mistakes should be celebrated, not blamed.</li><li>Avoid monolithic deliverables. You scope and stage your work into well-defined milestones to ship.</li><li>Past work with front-end infrastructure. Perhaps you've created your company's design system, written a Babel plugin, or written complex React components. It would be great if you could address this in your cover letter!</li></ul><h3>Nice to have (but not required)</h3><ul><li>You've contributed to a design system before. You have worked on enterprise components in the past, maybe for internal use in your company. You have built complex and advanced features while making sure the accessibility was fully functional.</li><li>You've maintained an active repository before. Maybe you've helped maintain a popular open-source repository, or perhaps you've worked on internal repositories that saw contributions from multiple teams. Previous experience with highly active repository workflows is a definite plus for this role.</li><li>You have contributed code. A history of contributing to MUI's open-source projects is a plus.</li></ul><h2>Benefits and compensation</h2>We offer competitive compensation commensurate with your experience level and location and are prepared to pay top market rates for someone who can clearly exceed the role's expectations. You can find the other perks and benefits on the careers page.

React Engineer — X

react-engineer-x

<h2>The company</h2>MUI's story began in 2014 with Material&nbsp;UI, the most successful React implementation of Google's Material Design. Today, Material&nbsp;UI stands as one of the most popular open-source libraries on GitHub and has paved the way for the fully-fledged startup known as MUI (founded in 2019), which now boasts an ever-expanding ecosystem of React UI products. We're a company of 35+ people as of early 2024, and we're growing.<h2>The products</h2>MUI is best known for our flagship product, Material&nbsp;UI—but this is just one of three core component libraries we maintain. Base&nbsp;UI is our headless component library, and Pigment&nbsp;CSS is a zero-runtime CSS-in-JS styling engine. We also host Design Kits and pre-built Templates.Beyond the core libraries, MUI&nbsp;X offers advanced components like the Data Grid, Date and Time Pickers, and Charts, for more complex user interactions and data visualization needs.We're also making ambitious moves to incorporate our full suite of components into Toolpad, a low-code admin builder tool for assembling full-stack apps faster than ever.Learn more about MUI's products in this blog post: An introduction to the MUI ecosystem.<h2>The culture</h2>MUI is a fully remote company with a team that spans the globe. The majority of our work is asynchronous, and we rely on written communication to collaborate. We're radically transparent: nearly all of our work happens in public. Each contributor has the freedom to decide how and when they work, and that work is primarily self-directed: it's your responsibility to define and complete your own tasks in a timely manner.For additional details about the culture, you can check our careers and about pages and also our public Handbook.<h2>Why we're hiring</h2>The eXplore team (part of MUI&nbsp;X) needs your help. The team is currently responsible for the Pickers and Tree&nbsp;View components with plans to expand to others in the future. Initially, we want to double down on our Pickers and work towards providing even greater customizability.We also need help to continue to improve the health of the open-source product: make the advanced components easier to use, make it support more use cases, improve performance, make it more accessible, increase the contributions by engaging and collaborating with the community, guide developers to answers, and just generally be a positive presence in the open-source community.The mission of the eXplore team is to help deliver the most comprehensive UI library the world has ever seen.<h3>Why this is interesting</h3>The advanced components portfolio is still small, with a million interesting and challenging problems to solve.Our products empower React developers to build awesome applications faster – we see millions of developers on MUI's docs every year, one million a month.<h2>The role</h2><h3>Key responsibilities</h3>Depending on the day, you'll:<ul><li>Help guide architectural decisions. The future of MUI is discussed and planned in our public RFCs and issues. You'll be helping drive these conversations and guiding MUI toward the best possible solutions.</li><li>Contribute to deep, meaningful refactors and feature releases. MUI is a complex codebase. Components we've shipped recently, such as the data grid and date pickers have required months of dedicated, careful work.</li><li>Reduce friction. A large amount of the work on MUI is reducing friction and making it easier to use. This might involve careful API design, identifying and fixing top bugs, creating easier-to-understand error messages, and writing documentation and blog posts about features you ship.</li><li>Collaborate with the community. Many small, as well as meaningful fixes and features, have been contributed by the community. Your role is to draw the best out of the community — to inspire those across the world to create and contribute through your reviews of their issues and pull requests.</li><li>Experiment and play. Great, unexpected features and heisenbug fixes have come from a number of sources — relentlessly methodical processes of elimination, free-flowing team collaboration, inspiration by adjacent libraries and projects, and difficult-to-explain individual strokes of brilliance. Whatever your preferred style is for creating new things that others might not have thought of, you'll find a welcome home on the team.</li><li>Take ownership of features from idea/mockup to live deployment. You'll shape and guide the direction of crucial new features, including new components.</li><li>Ship. Early and often. You'll iterate and ship frequently. You'll have a real impact on the end-user experience and you'll love working on a team that builds stunning UIs and prioritizes delivering real user value as often as possible.</li><li>You'll be interacting with the users on a regular basis, handling inbound support and feature requests (every developer helps with developer requests).</li></ul><h3>The best parts of this job</h3><ul><li>You'll be at the cutting edge of application development — working on one of the fastest-growing UI libraries on the market.</li><li>You'll be part of an active, open, friendly community of developers that are excited about building awesome applications.</li><li>Your role will be key to making MUI the go-to UI solution for building applications, websites, and design systems with React.</li></ul><h3>The worst parts of this job</h3><ul><li>Shifting context. You will necessarily have to shift context and dive into a different feature before the current one is done. It may even be in an area of the codebase you're unfamiliar with or don't have a ton of understanding about. It's fun, rewarding work, but it can be very challenging.</li><li>We move quickly but don't sacrifice quality. We ship early, often, and quickly. You may not be initially comfortable with the cadence with which we ship high-quality features and improvements to end-users. By doing so, we sacrifice on solving each problem 100% in exchange for fast feedback. Solving 50-70% of the issue with quality should be enough for any given iteration. Our users quickly tell us when we haven't pushed a solution far enough.</li><li>MUI has a large codebase. You may bang your head against the wall at times, and then write tests to assist future you 😌. The work you will be doing is somewhat unique and idiosyncratic. You probably have not had a similar role before.</li><li>In open-source, you're faced with a nonstop stream of bug reports and support requests. That means you need to develop an intuition for when to ignore something, and when to dig in further.</li></ul><h2>Who we're looking for</h2>We're looking for someone with strong front-end skills. More important than specific technical skills though is that you're a strong problem solver who loves to learn. Details matter to you.<h3>Required</h3><ul><li>Expertise in the modern JavaScript ecosystem. MUI's open-source projects are built on the shoulders of giants, making use of technologies such as ES2021, TypeScript, Node.js, React, Next.js, webpack, and Babel.</li><li>A track record of demonstrating an eye for product and solving real-world user problems. If you have a knack for solving problems at the root cause, shipping beautiful user interfaces and intuitive APIs, we want you on our team.</li><li>Experience building and shipping production code in a team setting with a passion for writing tested, performant, and high-quality code.</li><li>Strong written and verbal communication skills. As part of the team, you'll interface both directly and indirectly with community members and enterprise customers, and contribute to user documentation. Clear communication is fundamental in creating intuitive and compelling resources.</li><li>Ability to dive into complex problems. You should be able to quickly assess, understand, and iterate upon aspects of our codebase.</li><li>Ready and willing to ask and answer questions. If you're comfortable saying you're unsure, asking for help; but equally reaching out to assist others, you'll be an incredible addition to our team. We thrive because of continuous learning. First-time mistakes should be celebrated, not blamed.</li><li>Avoid monolithic deliverables. You scope and stage your work into well-defined milestones to ship.</li><li>Past work with front-end infrastructure. Perhaps you've created your company's design system, written a Babel plugin, or written complex React components. It would be great if you could address this in your cover letter!</li></ul><h3>Nice to have (but not required)</h3><ul><li>You've contributed to a design system before. You have worked on enterprise components in the past, maybe for internal use in your company. You have built complex and advanced features while making sure the accessibility was fully functional.</li><li>You've maintained an active repository before. Maybe you've helped maintain a popular open-source repository, or perhaps you've worked on internal repositories that saw contributions from multiple teams. Previous experience with highly active repository workflows is a definite plus for this role.</li><li>You have contributed code. A history of contributing to MUI's open-source projects is a plus.</li></ul><h2>Benefits and compensation</h2>We offer competitive compensation commensurate with your experience level and location and are prepared to pay top market rates for someone who can clearly exceed the role's expectations. You can find the other perks and benefits on the careers page.

React Engineer — eXplore

react-engineer-explore

<h2>The company</h2>MUI's story began in 2014 with Material&nbsp;UI, the most successful React implementation of Google's Material Design. Today, Material&nbsp;UI stands as one of the most popular open-source libraries on GitHub and has paved the way for the fully-fledged startup known as MUI (founded in 2019), which now boasts an ever-expanding ecosystem of React UI products. We're a company of 35+ people as of early 2024, and we're growing.<h2> The products</h2>MUI is best known for our flagship product, Material&nbsp;UI—but this is just one of three core component libraries we maintain. Base&nbsp;UI is our headless component library, and Pigment&nbsp;CSS is a zero-runtime CSS-in-JS styling engine. We also host Design Kits and pre-built Templates.Beyond the core libraries, MUI&nbsp;X offers advanced components like the Data Grid, Date and Time Pickers, and Charts, for more complex user interactions and data visualization needs.We're also making ambitious moves to incorporate our full suite of components into Toolpad, a low-code admin builder tool for assembling full-stack apps faster than ever.Learn more about MUI's products in this blog post: An introduction to the MUI ecosystem.<h2> The culture</h2>MUI is a fully remote company with a team that spans the globe. The majority of our work is asynchronous, and we rely on written communication to collaborate. We're radically transparent: nearly all of our work happens in public. Each contributor has the freedom to decide how and when they work, and that work is primarily self-directed: it's your responsibility to define and complete your own tasks in a timely manner.For additional details about the culture, you can check our careers and about pages and also our public Handbook.<h2>Why we're hiring</h2>We believe CSS-in-JS is the best styling API with the best developer experience for writing CSS. We've used it in Material&nbsp;UI since v1 (back then, with JSS, and currently with Emotion in v5). However, there are key challenges we need to overcome to keep using this stack: improving performance and compatibility with React 19 features, including React Server Components. That's why, about a year ago, we started to work on Pigment&nbsp;CSS! We recently released an early alpha version, introduced at React Conf 2024, for which we're seeing early positive adoption and some community validation.This is just the beginning, though. There's so much to do to make Pigment&nbsp;CSS a reliable and mature option for the future of Material&nbsp;UI and for many developers looking for a next-generation CSS-in-JS styling engine. We're well-positioned to make this happen, so we're looking for a talented engineer to join the team and help us get further beyond!<h3>Why this is interesting</h3>If the team is successful, we believe that over 1/3 of the JavaScript community would use Pigment&nbsp;CSS to style their application, making the mission both extreamly challenging and impactful.<h2> The role</h2><h3>Key responsibilities</h3>Depending on the day, you'll:<ul><li>Build. You will help Pigment&nbsp;CSS mature by integrating it with various bundlers and frameworks, building new features, and improving DX.</li><li>Nurture community contributions. You will provide guidance and direction to unlock the contributions of the community.</li><li>Influence the product strategy. You will be empowered to help design and shape a roadmap that solves real developer problems.</li><li>Keep technical debt in check. You will ensure we can keep shipping features at a reasonable pace while aligning the team on "the right way" of doing things.</li><li>Be a solver. You will dig deep into arbitrarily complex problems and find an appropriate path forward. Some focus on a given area for long periods, others bounce from hotspot to hotspot as guided by organizational leadership.</li></ul><h3>The best parts of this job</h3><ul><li>You'll be at the cutting edge of application development working on one of the fastest-growing CSS-in-JS libraries on the market.</li><li>You'll be part of an active, open, friendly community of developers who are excited about building awesome applications.</li><li>Your role will be key to making MUI's libraries the go-to UI solutions for building applications, websites, and design systems that do not have to trade performance for a great developer experience.</li></ul><h3>The worst parts of this job</h3><ul><li>Shifting context. You will necessarily have to shift context and dive into a different feature before the current one is done. It may even be in an area of the codebase you're unfamiliar with or don't have a ton of understanding about. It's fun, rewarding work, but it can be very challenging.</li><li>We move quickly but don't sacrifice quality. We ship early, often, and quickly. You may not be initially comfortable with the cadence with which we ship high-quality features and improvements to end-users. By doing so, we sacrifice solving each problem 100% in exchange for fast feedback. Solving 50-70% of the issue is often enough. Our users quickly tell us when we haven't pushed it far enough.</li><li>MUI has large codebases. You may bang your head against the wall at times and then write tests to assist future you. The work you will be doing is somewhat unique and idiosyncratic. You probably have not had a similar role before.</li><li>In open-source, you're faced with a nonstop stream of bug reports and support requests. That means you need to develop an intuition for when to ignore something and when to dig in further.</li></ul><h2> Who we're looking for</h2>We're looking for someone with strong core JavaScript skills. More important than specific technical skills, though, is that you're a strong problem solver who loves to learn. Details matter to you.<h3>Required</h3><ul><li>Expertise in the modern JavaScript ecosystem. You'll use technologies such as TypeScript, Node.js, Babel, Rust, or SWC. We'd appreciate it if you've already written a Babel plugin or something similar.</li><li>A track record of solving real-world user problems. If you have a knack for solving problems at the root cause and shipping beautiful user interfaces with intuitive APIs, we want you on our team.</li><li>Strong written and verbal communication skills. As part of the team, you'll interface directly and indirectly with community members and enterprise customers, as well as contribute to internal and external documentation.</li><li>Ability to dive into complex problems. You should be able to quickly assess, understand, and iterate upon aspects of our codebase.</li><li>Willingness to ask and answer questions. You're comfortable saying you're unsure and asking for help. You'll also reach out out to assist others. We thrive through continuous learning—first-time mistakes are celebrated, not blamed.</li><li>Leadership skills. You will guide and mentor contributors, steering the community in the right direction.</li></ul><h3>Nice to have (but not required)</h3><ul><li>You've maintained an active repository before, regardless of whether it was open-source or private, that saw contributions from multiple teams.</li><li>You've contributed to a CSS-in-JS library in the past.</li></ul><h2> Benefits and compensation</h2>Competitive compensation depending on the profile and location. We are ready to pay top market rates for a person who can clearly exceed the role's expectations. You can find the other perks &amp; benefits on the careers page.

MUI

React Engineer — X

React Engineer — eXplore

Staff Engineer — Pigment CSS