Sr. Full Stack Engineer

About Us: ENTER is a profitable, fast-growing AI healthcare fintech company on a mission to revolutionize Revenue Cycle Management (RCM). In the U.S., healthcare makes up nearly 20% of GDP, and providers spend 5–10% of their revenue just trying to collect money from insurance companies and patients. It’s an outdated, painful, administrative mess. We’re here to change that. Our mission is bold: automate 1% of GDP by eliminating the manual, inefficient workflows that plague financial operations in healthcare. We’re building modern systems to replace the legacy software and armies of billing staff that have been the norm for decades. At ENTER, we believe better financial infrastructure means better healthcare. By using cutting-edge AI and automation, we empower healthcare providers to focus on what matters most: delivering exceptional care, not chasing payments. We’re a fully remote, US-based team of engineers, designers, and healthcare experts. We’re curious, mission-driven, and product-obsessed. If you're excited about building transformative technology in one of the biggest and most broken industries, we’d love to meet you. ⸻ Location : Remote (US-based preferred) Type : Full-time ⸻ About the Role We’re looking for a Senior Full-Stack Engineer to join our team and help build the next generation of healthcare infrastructure. You’ll work across the stack to design and ship high-performance software that integrates with real-world clinical workflows, revenue cycle systems, and patient data pipelines. This role is ideal for someone who thrives in product-oriented engineering , wants to own features end-to-end, and is passionate about solving meaningful problems in healthcare using cutting-edge technologies. ⸻ What You’ll Do Build high-performance frontend interfaces using React and TypeScript Design and implement real-time, privacy-aware APIs and microservices in Java Work with LLMs and third-party APIs to generate intelligent summaries and recommendations Integrate with healthcare platforms (e.g. EMRs, PMs, clearinghouses) through APIs or user interfaces Optimize for speed, reliability, and usability across a variety of workflows Collaborate closely with product, design, and compliance teams to ensure our tools are secure, HIPAA-compliant, and delightful to use ⸻ You Have 2+ years of experience writing production Java (Spring Boot preferred) 5+ years of experience across the stack (frontend/backend/cloud) Strong proficiency in React, TypeScript, and modern frontend tooling Experience working with Redis , AWS infrastructure , and real-time APIs Familiarity with LLMs, AI tooling , or interest in integrating smart agent workflows A bias toward shipping fast , making pragmatic decisions, and iterating A high degree of autonomy and ownership—you’re comfortable architecting, implementing, and scaling solutions from scratch ⸻ Bonus (but not required) Experience with HIPAA-compliant systems, healthcare data, or clinical workflows Previous work building internal tools, Chrome extensions, or productivity apps Familiarity with observability tools like Sentry, PostHog, or Honeycomb Startup or founder-like DNA ⸻ Why Join Work on meaningful, real-world problems in healthcare that impact patients and providers every day Join a small, fast-moving team where you’ll have direct input into product and technical strategy Competitive compensation + equity Fully remote team with flexibility and high trust A mission-driven company that combines AI, design, and healthcare infrastructure