• Develop and maintain front-end features using React 18 (functional components, hooks) • Build and improve UI components using Material UI v6 including MUI X (DataGrid, DatePickers) • Implement new features from clearly defined Linear tickets with acceptance criteria • Work within Redux Toolkit architecture (slices, async thunks, selectors) • Maintain and extend WebSocket-based real-time features • Manage complex routing with React Router v6 (guarded routes, multi-role layouts) • Conduct regression testing on new features before staging deployment • Work closely with the lead developer to understand API contracts and backend responses • Debug and resolve UI performance issues (memoization, render optimization) • Build and maintain permit form templates within the platform (building permits, electrical permits, NOCs, legal descriptions, and other municipal/legal documents) • Support the forms digitalization pipeline (AI-assisted PDF form processing) • Provide recommendations for improving usability and workflow efficiency • Assist with incremental migration from JavaScript to TypeScript • Assist with migration from Create React App (CRA) to Vite

• Architect scalable and maintainable front-end solutions using React, modern JavaScript, and TypeScript. • Drive the adoption of efficient state management and modular build processes (e.g., Webpack, module federation). • Design resilient, failure-tolerant systems that account for load, performance, and web security (CORS, CSP, OWASP). • Ship complex, high-quality code to production in a timely manner to meet crucial business expectations. • Optimize web pages for maximum speed and scalability by deeply tuning the event loop and rendering steps (style, layout, paint, composite). • Validate code reliability by building out comprehensive testing infrastructure (Jest, React Testing Library, unit/integration testing). • Mentor junior developers and elevate team standards through thorough, constructive code reviews. • Partner with Product Managers, Designers, and Delivery Managers to align technical execution with overarching business goals. • Unblock the team by debugging deeply rooted technical issues and creating Proof of Concepts (POCs) for new technologies.

Senior Software Engineer - Matterport 3D Experiences Job Description CoStar Group (NASDAQ: CSGP) is a leading global provider of commercial and residential real estate information, analytics, and online marketplaces. Included in the S&P 500 Index and the NASDAQ 100, CoStar Group is on a mission to digitize the world’s real estate, empowering all people to discover properties, insights, and connections that improve their businesses and lives. We have been living and breathing the world of real estate information and online marketplaces for over 35 years, giving us the perspective to create truly unique and valuable offerings to our customers. We’ve continually refined, transformed, and perfected our approach to our business, creating a language that has become standard in our industry, for our customers, and even our competitors. We continue that effort today and are always working to improve and drive innovation. This is how we deliver for our customers, our employees, and investors. By equipping the brightest minds with the best resources available, we provide an invaluable edge in real estate. About Matterport: Matterport is leading the digital transformation of the built world. Our groundbreaking spatial computing platform turns buildings into data, making every space more valuable and accessible. Millions of buildings in more than 170 countries have been transformed into immersive Matterport digital twins to improve every part of the building lifecycle from planning, construction, and operations to documentation, appraisal, and marketing. About the Role: As a Senior Software Engineer on the 3D Experiences team at Matterport, a part of CoStar Group, you will be at the forefront of creating engaging user experiences and insights around Matterport’s 3D model technology. You will play a critical role in researching, developing, and implementing new features to our model viewer and editing platforms, maintaining existing feature sets, influencing code architecture, and impacting the way we build software together. You will work within a dynamic R&D environment, collaborating closely with fellow engineers, researchers, product, and design teams to translate groundbreaking ideas into tangible features that empower our users and expand the capabilities of our platform. Your work will be seen by 100’s of millions of viewers of Matterport models around the world and will be at the core of our customers' day-to-day workflows. This position can be located remotely across the continental United States. Responsibilities: - Implement new features for our 3D model viewer and editing tools utilizing Typescript, Three.js WebGL, and React. - You will develop new ways for our customers to interact, augment, and enhance their Matterport models with data. - Work with a cross-functional team of product managers, designers, and fellow engineers to define project requirements, explore technical feasibility, and deliver high-impact features. - Create working prototypes for new concepts, ideas, or platforms we want to explore. - Present concepts, progress, and delivered results to peers and stakeholders. - Advocate for new technical architecture and innovation. Basic Qualifications: - Bachelor’s Degree in Computer Science or related field from an accredited, not for profit university or college - 5+ years of experience developing and maintaining user-friendly, performant web applications - Demonstrated proficiency working with Typescript, WebGL, and/or React - Experience working on a team, supporting teammates through peer review, and releasing software in a team environment with multiple work streams. - Versed and capable of solving problems in 3D space. - A track record of commitment to prior employers. Preferred Qualifications: - Master’s Degree in Computer Science or related field - 8+ years of experience working with Typescript, WebGL, and React building performant web applications. - Strong proficiency working with Three.js - Exposure to architectural patterns of large JavaScript applications. - Experience writing unit tests and mocking. - Experience shipping software in a large codebase to a large audience. - Experience working with Snowflake, Looker, and other advanced analytics tools. - Experience with mobile web-based application development. - Experience with AR/VR application development. What’s in it for you? When you join CoStar Group, you’ll experience a collaborative and innovative culture working alongside the best and brightest to empower our people and customers to succeed. We offer you generous compensation and performance-based incentives. CoStar Group also invests in your professional and academic growth with internal training, and tuition reimbursement. Our benefits package includes (but is not limited to): - Comprehensive healthcare coverage: Medical / Vision / Dental / Prescription Drug - Life, legal, and supplementary insurance - Virtual and in person mental health counseling services for individuals and family - Commuter and parking benefits - 401(K) retirement plan with matching contributions - Employee stock purchase plan - Paid time off - Tuition reimbursement - On-site fitness center and/or reimbursed fitness center membership costs (location dependent), with yoga studio, Pelotons, personal training, group exercise classes - Access to CoStar Group’s Diversity, Equity, & Inclusion Employee Resource Groups - Complimentary gourmet coffee, tea, hot chocolate, fresh fruit, and other healthy snacks This position offers an annual salary range from $124,000 - $195,000 determined by relevant skills and experience, in addition to a generous benefits plan. We welcome all qualified candidates who are currently eligible to work full-time in the United States to apply.  However, please note that CoStar Group is not able to provide visa sponsorship for this position. #Matterport #LI-KW1 #LI-remote CoStar Group is an Equal Employment Opportunity Employer; we maintain a drug-free workplace and perform pre-employment substance abuse testing

• Build and maintain frontend features across client-facing SPAs using Vue.js. • Write clean, well-documented, and testable code with unit tests using Vitest or Jest. • Participate in cross-level code reviews — giving and receiving feedback on PRs across all seniority levels. • Collaborate with back-end engineers to integrate APIs and ensure smooth end-to-end data flow. • Work within Agile/Scrum ceremonies — standups, sprint planning, retrospectives, and sprint reviews. • Identify and address performance bottlenecks and contribute to improving frontend architecture. • Build reusable components and contribute to shared code libraries. • Work closely with product and design to gather and implement technical and UX requirements. • Use AI-assisted development tools to improve your own output and delivery speed. • Stay current with frontend best practices and contribute ideas to the team's technical direction.