Senior React Software Developer

Architecture & Delivery
• Define and evolve frontend architecture, including module boundaries, component architecture, state/data flow, performance and accessibility, lazy loading, error handling, observability, etc. • Lead the implementation of key frontend features and ensure resilience for streaming and large payload rendering. • Drive the abstraction of reusable components and ensure best practices in code quality. Technical Leadership • Set coding standards and ensure discipline in code quality practices. • Mentor engineers through design reviews, detailed code reviews, pairing, and measurable growth plans. • Champion accessibility standards and ensure compliance with best practices. Quality & Testing • Mature the testing strategy, implementing unit tests, integration tests, and end-to-end tests. • Introduce automation for visual regression and accessibility testing. • Enforce type safety and eliminate dead code, raising coverage on critical surfaces. Security & Compliance • Collaborate on security measures, ensuring safe handling of user data and compliance with best practices. • Define secure patterns for file handling and API integrations. Data & Observability • Capture user interactions and performance metrics. • Use metrics to prioritize refactors and ensure system reliability. Collaboration & Process • Drive cross-team initiatives and contribute to shared code repositories. • Guide migration or consolidation efforts to ensure a cohesive design system. Innovation • Evaluate and implement emerging frontend patterns and technologies. • Optimize user experiences based on feedback and performance data. Our fast-moving inner-source environment encompasses multiple repositories, including a web application and browser extension, utilizing technologies such as React 18, TypeScript, Vite, Ant Design, XYFlow (graph/canvas), Chart.js, Mermaid, motion-based UI, React Router v7, Vitest, Testing Library, ESLint/Prettier, and secure enterprise integrations (Okta, internal APIs, etc). Our focus is on scalable UI architecture, performance streaming chat UX, accessibility, data visualization, and safe multi-model LLM interactions (OpenAI, Anthropic, Gemini, internal services, MCP). Required Qualifications • 8+ years of professional frontend experience, with at least 3 years in a leadership or mentoring role. • Expertise in React and TypeScript, including typing, performance profiling, and context, reducer, hooks architecture. • Strong experience with modern build tooling (e.g., Vite, ES modules, tree-shaking). • Experience with complex state and data orchestration, including context management. • Understanding of secure frontend patterns and REST API integration. Preferred Qualifications • Testing expertise, including unit and integration testing frameworks. • Previous experience with XYFlow or building Canvas visualized graph-based projects • Strong focus on accessibility and performance optimization. • Familiarity with Ant Design, design library customization strategies, design token systems and theming. Nice to Have • Experience with React Native or cross-platform component strategies. • Knowledge of data visualization libraries and rendering pipelines. • Experience with browser extensions and their architecture. Education • Bachelor’s degree in Computer Science or equivalent experience (an advanced degree is a plus). Core Behaviors • Outcome and metrics-driven with autonomous prioritization. • A mentorship mindset that elevates peers. • A bias for incremental delivery with architectural foresight. • Clear and candid communication.