Senior Software Development Engineer (Front-end)

Keystone AI is a Legal AI company delivering Legal Operating Intelligence for the future of legal work. Grounded in a singular system of truth, Keystone AI brings together data, documents, workflows, and teams into one unified platform—where modern legal work happens with clarity and consistency. Powered by LOIS , the Legal Operating Intelligence System, Keystone AI connects context across every matter to transform legal operations from reactive to proactive. LOIS reads, understands, and reasons across your data to surface insight, automate complexity, and give professionals the clarity and confidence to see more, know more, and do more. Fueled by a team of exceptional collaborators and innovators, Keystone AI ’s rapid growth has earned AI awards and recognition from Deloitte and Inc. as one of the most innovative and fastest-growing technology companies in the country. About Keystone AI : Keystone AI is changing the way legal work gets done for law practitioners and their clients. As the leading legal operating system, Keystone AI is dedicated to empowering organizations with tools to simplify and elevate complex, high-stakes legal work. Powering everything from document and case management to timekeeping, billing and business analytics, over 3,400 law firms and legal teams use Keystone AI daily to deliver excellence. With these groundbreaking AI features, Keystone AI is empowering law firms and legal teams to deliver excellence to their clients with unprecedented speed and efficiency. Requirements 5+ years of professional frontend development experience building production web applications. Hands-on production experience with Svelte (or SvelteKit), including building reusable components and managing component state and reactivity. Working proficiency in AngularJS and React — enough to read, maintain, debug, and extend existing code in both frameworks. You won't need to be an expert in either, but you should be comfortable navigating both codebases. Strong fundamentals in modern JavaScript ( ES2020+ ); comfort with TypeScript or willingness to ramp up quickly. Solid HTML, CSS, and responsive design skills — including familiarity with modern layout techniques (Flexbox, Grid) and CSS preprocessors or utility frameworks. Experience consuming and integrating with REST or GraphQL APIs, including handling async state, errors, and edge cases gracefully. Qualifications Work and Lead a small team that owns, builds, and innovates on major new and existing product features Coordinate with team management and quality assurance personnel on releases of new features 100% remote work within the United States Familiarity with frontend testing tools (Playwright, Jest, Vitest, Cypress, or similar) and a habit of writing tests alongside features. Working knowledge of Git and modern software development workflows: code review, CI/CD, branching, and Agile/Kanban delivery. Demonstrated attention to UI/UX quality, accessibility (WCAG basics), and frontend performance. Ability to work remotely and independently within the United States, and to collaborate effectively with non-technical stakeholders. Willingness to learn our users' challenges and understand how your work directly affects them. B.S. in Computer Science, a related field, or equivalent professional experience Nice to haves: C# / .NET experience , or familiarity with reading and integrating against a .NET-based application backend. Backend development experience — building and maintaining APIs, services, or database-backed business logic alongside frontend work. Experience with component libraries, design systems, or building shared UI infrastructure used by multiple teams. Familiarity with state management patterns at scale (Svelte stores, Redux, Zustand, React Query, Context patterns). Exposure to cloud-hosted environments (AWS) and deployment tooling (Octopus, GitHub Actions, GitLab CI, or similar). Familiarity with the legal tech domain or other workflow-heavy SaaS products. Interest in AI-assisted UX patterns and integrating LLM-powered features into the frontend. Compensation Information: $160,000 - $205,000 The base salary range represents the low and high end of the salary range for this position. The total compensation package for this position will be determined by each individual’s location, qualifications, education, work experience, skills and performance. We believe in the importance of pay equity - the range listed is just one component of Keystone AI ’s total compensation package for employees. This position is also eligible for stock options, a paid time off policy, as well as a comprehensive benefits package. Cool Company Benefits: - A dynamic, rapidly growing company, focused on helping organizations thrive - Medical, Dental, & Vision Insurance (for full-time employees) - Competitive & Fair Pay - Maternity & paternity leave (for full-time employees) - Short & long-term disability - Opportunity to learn from a dedicated leadership team - Top-of-the-line company swag Privacy Polic