Software Engineer, Frontend

Midstream is an AI-native financial operating system for health systems, founded by experienced entrepreneurs and backed by top-tier investors. We give finance, supply chain, and managed care teams real-time visibility into where margin is at risk, with a precise action plan for capturing it before it's gone. Purpose-built for healthcare's complexity, Midstream transforms structured, unstructured, and external data into instant, contract-aware insights that drive smarter decisions. Our AI agents unify spend and revenue operations across the full back-office, learning and adapting with every interaction and delivering always-on intelligence that no point solution or one-off engagement can match. We're compressing months to minutes and turning post-period hindsight into in-the-moment foresight. The tempo of healthcare finance is changing, and Midstream is leading it. Opportunity We are looking for a Software Engineer, Front End to design and build the interaction layer for Midstream’s AI-native product. This role focuses on how users understand, decide, and act within the product. You will translate complex data and AI-driven responses into clear, intuitive experiences that guide users toward the right decisions rather than just present information. You’ll work across the stack, with a primary focus on frontend, to build fast, responsive interfaces that make complex workflows and decisions feel simple and reliable. This is an opportunity to help define how AI-native interfaces behave in production systems and over complex datasets, blending chat with structured, guided interactions. What you'll be doing Build the interaction layer for an AI-native product Design and implement user interfaces that turn complex data, insights, recommendations into clear, actionable workflows. Translate complexity into intuitive experiences Make complex data systems feel simple, fast, and navigable through strong interaction design and information architecture. Define AI-native UX patterns Design interfaces that are suggestive, responsive, and trustworthy, guiding users toward decisions rather than leaving them with open-ended outputs. Own frontend systems and architecture Build scalable frontend components and patterns that enable fast, consistent product development. Work across the stack Partner closely with backend systems, on APIs, data models, and real-time infrastructure to deliver seamless product experiences. Who you are A strong frontend engineer with product instincts You build high-quality user experiences and care deeply about usability, interaction design, and performance. Comfortable across the stack You’re strong in TypeScript, React (or similar), and modern frontend architecture, and comfortable working with APIs and backend systems. Experienced with complex interfaces You’ve built analytics-heavy or workflow-driven products and know how to make them feel intuitive and fast. Interested in AI-native products You have experience with or a strong curiosity about agent-driven systems and how they shape user interaction. A builder who thrives in ambiguity You’re comfortable turning loosely defined problems into intuitive and reliable product experiences.