> Markdown version of [/jobs/ext/1338115-senior-software-engineer-i](https://www.wearedevelopers.com/jobs/ext/1338115-senior-software-engineer-i). Every page supports `.md` or `Accept: text/markdown`. Links point to the HTML versions so they work for humans too. Agent guide: [/agents.md](https://www.wearedevelopers.com/agents.md). --- # Senior Software Engineer I - **Company:** Modus Closing - **Location:** Seattle, WA, United States - **Experience:** Expert - **Salary:** $149,580.0 - $166,200.0 - **Contract:** Permanent contract - **Skills:** JavaScript (Programming Language), Application Programming Interfaces (APIs), Business Logic, Browser Compatibility, Continuous Integration, Design of User Interfaces, Node.Js, Ui Patterns, Software Engineering, Systems Integration, TypeScript, Web Performance Optimization, ReactJS, Cypress (Programming Language), Backend, Webpack, Git Flow, Material UI, Information Technology, Front End Software Development, React Testing Library, Legacy Systems, Microservices - **Published:** July 18, 2026 - **Apply:** https://www.indeed.com/viewjob?jk=bb8fcdc2fc3cfbc5 ## About the Role * 5+ years of software engineering experience, with a strong emphasis on frontend development using TypeScript and React. * Deep expertise in frontend architecture, complex state management, and building scalable, reusable UI component libraries. * Proven experience migrating legacy frontend applications to modern web architectures while maintaining a seamless user experience. * Strong understanding of web performance optimization, accessibility standards (a11y), and cross-browser compatibility. * Solid experience integrating complex frontend applications with backend microservices via gRPC. * A collaborative, full-stack mindset with the ability and willingness to navigate or contribute to backend services (e.g., Go or Node.js) when needed to unblock features. * Dedication to frontend testing best practices utilizing tools like Jest, Cypress, or React Testing Library. * Comfort working across modern CI/CD tooling, frontend build pipelines (e.g., Webpack, Vite), and collaborative Git-based workflows. * Practical experience using AI-assisted development tools in real delivery environments, including familiarity with tools like ClaudeCode and concepts such as CLAUDE.md project configuration and custom skills. * BS in Computer Science or equivalent practical experience. ## Description * Build "One-Click" User Experiences: Lead the frontend development of seamless, intuitive user interfaces for lead generation and order submission workflows for Title & Escrow, Insurance, Mortgage, and Home Warranty within the Home Platform. * Drive Frontend Legacy Migrations: Play a key role in the technical migration of frontend workflows and components from legacy systems to our integrated platform, ensuring zero disruption to existing attach metrics and agent satisfaction. * Develop Robust Integrations: Partner closely with backend engineers to securely and efficiently consume internal APIs and third-party partner integrations (such as Assurant, GRA, and Origin Point). * Implement Complex Business Logic: Address complex product requirements within the UI tier, handling multi-tenancy rules, form validations, and complex state management across various real estate workflows. * Elevate Frontend Standards: Write high-quality, testable, and performant code. Establish frontend best practices, lead UI-focused design reviews, and champion accessibility and performance across the Integrated Services ecosystem. ## Related Videos - [Watch Tests Go Brrrr! : Getting Started with Cypress in ReactJS](https://www.wearedevelopers.com/videos/282-watch-tests-go-brrrr-getting-started-with-cypress-in-reactjs) - [Micro Frontends with Module Federation: Why and How?](https://www.wearedevelopers.com/videos/165-micro-frontends-with-module-federation-why-and-how) - [Developing the Backend with Stefan Lingler, CTO at Shpock](https://www.wearedevelopers.com/videos/100360-developing-the-backend-with-stefan-lingler-cto-at-shpock) - [But, you're not Facebook](https://www.wearedevelopers.com/videos/378-but-you-re-not-facebook) - [Meet Your New BFF: Backend to Frontend without the Duct Tape](https://www.wearedevelopers.com/videos/682-meet-your-new-bff-backend-to-frontend-without-the-duct-tape) - [Native Federation: The Future of Micro Frontends and Plugin-Systems in Angular](https://www.wearedevelopers.com/videos/1018-native-federation-the-future-of-micro-frontends-and-plugin-systems-in-angular) ## Related Articles - [16 Best Free React UI Libraries in 2025](https://www.wearedevelopers.com/magazine/148-16-best-free-react-ui-libraries-in-2025) - [React Developer Salary [2023]](https://www.wearedevelopers.com/magazine/198-react-developer-salary-2023) - [The Best 7 Frontend Frameworks for Developers in 2025](https://www.wearedevelopers.com/magazine/400-the-best-7-frontend-frameworks-for-developers-in-2025) - [Dev Digest 120 - Apple and peers](https://www.wearedevelopers.com/magazine/455-dev-digest-120-apple-and-peers) - [Dev Digest 133 - Back to Front](https://www.wearedevelopers.com/magazine/474-dev-digest-133-back-to-front) - [Dev Digest 136 - No JS(on) of mine](https://www.wearedevelopers.com/magazine/482-dev-digest-136-no-js-on-of-mine)