Senior Engineer, Integrations

Integration Engineer (Full-Stack Focus) About the Role This is a mid-level role perfect for an engineer passionate about building seamless, native-feeling user experiences and robust API connections. You will be responsible for the end-to-end development of integration features, ensuring the UI perfectly matches Halcyon Labs's native design while proactively handling the complexities of external API synchronizations. Key Responsibilities Frontend Development: Build elegant integration interfaces utilizing Angular (preferred) or React (secondary), styled strictly with Halcyon Labs Design System tokens. User Experience (UX): Design onboarding flows adhering to the principle of "Progressive Disclosure," keeping initial setups simple while tucking granular configurations into advanced menus. Proactive Error Handling: Implement rigorous client-side data validation to catch errors before API dispatch, and design graceful UX fallbacks for transient network failures and token expirations. End-to-End Quality: Achieve our "Gold Standard" Definition of Done by maintaining minimum 80% code coverage and building comprehensive E2E tests (Cypress/Playwright). Strictly utilize data-test-label attributes for test selectors. Full-Stack Contribution: Collaborate on backend TypeScript endpoints, adhering to the "One Codebase = One Service" paradigm. Documentation: Maintain up-to-date Swagger/OpenAPI documentation for all new endpoints and ensure seamless hand-offs via internal Wikis. About You You have a Bachelor’s Degree in Information Technology, Computer Science, or Software Engineering, plus 5+ years of full-stack or frontend-heavy software engineering experience. You have exceptional skills in Angular and React, paired with modern CSS frameworks. You are comfortable working in a strictly typed backend environment (TypeScript). You possess a deep empathy for the user and understand how to build UIs that gracefully handle asynchronous operations and external network lag. You are well-versed in modern testing frameworks (Cypress/Playwright, Jest) and CI/CD automated gating. You have a working knowledge of application security and authentication (sessions, JWTs, OAuth). You have working knowledge of utilizing AI-first coding assistants.