FrontEnd SW Engineer

At ZOLL, we're passionate about improving patient outcomes and helping save lives. We provide innovative technologies that make a meaningful difference in people's lives. Our medical devices, software and related services are used worldwide to diagnose and treat patients suffering from serious cardiopulmonary and respiratory conditions.
ZOLL Itamar is an innovative medical device technology company that focuses on the development and manufacturing of Home Sleep Apnea Tests to aid in the diagnosis of respiratory sleep disorders. Our core product is the WatchPAT®️ family, a revolutionary FDA-cleared portable home sleep apnea test device, that is based on proprietary signal and analysis. 80% of patients who have sleep apnea are undiagnosed. We are committed to reach those undiagnosed patients and provide testing to promote wellness and enhance overall quality of life. WatchPAT®️ is commercially available within major markets including the U.S., Japan, and Europe, and is the leading home sleep apnea test in the US. ZOLL Itamar's corporate headquarters, research and development and manufacturing are located in Israel with U.S. headquarters based in Atlanta, GA.
Job Type
Hybrid
Job Summary
We are looking for a frontend engineer specializing in complex visualization and performance-intensive applications to work on Viewer—a clinical application for reviewing, interpreting, and scoring home sleep studies. This is not a typical forms-and-dashboards frontend role. The Viewer displays clinical patient information and enables clinicians to navigate, inspect, annotate, and edit events directly on interactive waveforms. The engineering challenges involve high-volume time-series data, precision interactions, rendering performance, responsiveness, and memory efficiency. The role is focused on the frontend development. Backend experience is valuable for understanding APIs, data models, and end-to-end behavior, but the core expertise we seek is on the visualization/frontend side.
Essential Functions

• Interactive physiological-signal visualization: Build and maintain multi-channel waveform views with SciChart, including zoom/pan, channel arrangements, montages, and accurate navigation through long recordings.
• Clinical event interaction: Develop event overlays and precise interactions such as selection, drawing, dragging, editing, and scoring on top of time-series signals.
• High-performance rendering: Diagnose and improve slow rendering, UI responsiveness, and memory consumption when handling long, data-heavy studies. Work with Web Workers and browser profiling tools to keep interactions smooth.
• Complex data and state: Handle synchronization between displayed channels, annotations, scoring workflows, and analysis results; investigate difficult edge cases from real clinical studies.
• Specialized frontend architecture: Contribute to a substantial TypeScript / JavaScript application built with SolidJS, SciChart, Vite, and Tailwind CSS, with particular attention to reactive updates and rendering efficiency.
• Quality and reliability: Reproduce field issues, identify root causes, write and review fixes, and support testing, dependency updates, and releases in a regulated medical-device environment.
• System integration: Work with backend engineers on REST APIs and data flows needed by the Viewer.

Required/Preferred Education and Experience

• B.A. in Computer Science, Software Engineering, or a related technical discipline
• 4+ years of professional frontend software development experience.
• Strong experience with a reactive UI framework (SolidJS, React, or similar); direct SolidJS experience is not required.
• Proven experience with technically demanding visual interfaces—for example, interactive charts, waveform/signal viewers, scientific or industrial visualization, CAD-like interfaces, or large time-series datasets.
• Solid understanding of browser rendering, performance profiling, memory management, and responsiveness; ability to investigate performance bottlenecks rather than only implement UI features.
• Experience building precise interactive behaviors such as zooming, panning, selections, overlays, or drag-and-edit interactions.
• Experience with physiological signals, waveform viewers, signal processing, or scientific/medical visualization. preferred
• Experience developing software in medical-device or regulated environments. preferred
• Experience with Java / Spring Boot, REST API design, and service-oriented applications.
• Familiarity with SQL / MySQL, relational data models, and backend debugging.
• Exposure to AWS, Docker, Kubernetes, or CI/CD pipelines.

Knowledge, Skills and Abilities

• Excellent JavaScript and TypeScript skills, including asynchronous programming and complex application state.
• Strong debugging and problem-solving skills, including ownership of complex production issues.
• Ability to work with REST APIs and understand backend-driven data flows.
• Familiarity with Git, code reviews, testing, and collaborative development.

Preferred Languages

• Hebrew - Advanced
• English - Advanced

ZOLL is a fast-growing company that operates in more than 140 countries around the world. Our employees are inspired by a commitment to make a difference in patients' lives, and our culture values innovation, self-motivation and an entrepreneurial spirit. Join us in our efforts to improve outcomes for underserved patients suffering from critical cardiopulmonary conditions and help save more lives.