Senior Software Engineer II, API

Senior Software Engineer II, API / Backend Particle Health is revolutionizing healthcare data analytics and interoperability. Our mission is to unlock the power of medical records in an intelligent platform that focuses health back on the patient. Through our modern data platform, we enable healthcare innovatorsranging from value-based care providers and payers to digital health companies and health systemsto access standardized, real-time patient data. By bridging fragmented data silos, Particle empowers organizations to tackle critical use cases such as care coordination, risk stratification, patient identity management, and regulatory compliance with ease and precision. Our solutions of Snapshot, Signal, Navigator, and Workbench address the complex challenges of healthcare data analytics and interoperability, helping our customers transform data into actionable insights, improve patient outcomes, and streamline workflows. About the Role As a Senior API / Backend Engineer (Sr SWE II) at Particle Health, you'll play a key leadership role in building and maintaining the core services that power our healthcare data platform. You'll work primarily with Golang (and sometimes Python) to develop robust, scalable APIs that enable our customers to access and utilize healthcare data effectively. You'll take ownership of major systems, contribute to architectural decisions, mentor other engineers, and help shape the evolution of our backend platform as we scale. You'll collaborate closely with teams across engineering, product, and data to deliver high-quality solutions that serve the evolving needs of our healthcare partners. Location & Work Schedule This is a hybrid role based in New York City. The team works in-office two days per week, so applicants must be located within commuting distance and comfortable with in-person collaboration. What You'll Do Design, develop, and maintain RESTful APIs and backend services using Golang (and some Python). Build scalable, secure, and performant services that handle healthcare data with strong privacy and compliance standards. Implement authentication, authorization, and data validation for API endpoints. Integrate backend services with data pipelines and processing workflows. Elevate system performance and implement measurable efficiency gains. Take ownership of complex systems end-to-end, ensuring reliability and operational health. Lead or contribute to architectural discussions and long-term technical planning. Mentor engineers and contribute to improving engineering standards, tooling, and processes. Partner with product teams to translate requirements into technical solutions and support customer integrations. What We Seek Required: 7+ years of backend development experience focused on APIs and distributed systems. Strong production experience in Golang; comfortable working in Python when needed. Deep understanding of RESTful API design and scalable service patterns. Experience with SQL/NoSQL databases and cloud environments (GCP, AWS, or Azure). Hands-on experience with Docker, Kubernetes, and modern CI/CD tooling. Demonstrated ability to design, build, and operate end-to-end systems independently. Strong debugging, analytical, and communication skills. Experience using AI-enhanced coding tools (Claude Code, Copilot, Cursor, etc.). Bachelor's degree in CS/Engineering or equivalent experience. Nice to Have: Experience with healthcare data standards (FHIR, HL7, CCDA). Familiarity with Data Engineering / ETL workflows or data engineering pipelines. Experience with GCP Experience with Infrastructure as Code, specifically Terraform Event-driven architectures, message queues. API security and authentication patterns (OAuth, JWT). Knowledge of healthcare compliance frameworks (HIPAA, SOC2). What You Bring: A passion for building reliable, well-designed APIs. Strong attention to detail and commitment to code quality. Ability to balance technical excellence with delivery timelines. Curiosity about healthcare tech and willingness to grow domain expertise. Collaborative mindset and ability to support and guide teammates. Initiative and ownership across complex technical areas. Why Particle Health? Purposeful Work: Contribute to projects that directly improve healthcare access, empower providers, and enhance patient outcomes. Collaborative Culture: Thrive in a mission-driven, curiosity-fueled environment where ownership and bold ideas are celebrated. Flexibility & Balance: Enjoy unlimited PTO and a fully remote or hybrid work environment (for those in the NYC area), giving you the flexibility to work in an environment that's right for you. Comprehensive Benefits: Up to 100% employer-paid health benefits for you (depending on plan selection) and generous coverage for your family. Employer-funded 401(k) contribution to help you build a secure future. Mental health benefits to support your well-being. Invest in Your Future: Receive employee equity, ensuring you share in the company's success. Family Support: Access 14 weeks of fully paid parental leave, so you can focus on what matters most. At Particle Health, your contributions don't just impact the companythey shape the future of healthcare. Join us, and let's make a difference together Compensation Range: For this role, we're targeting a salary range of $190,000-220,000 annually, depending on experience and qualifications. If your background aligns more closely with a higher or lower level than the scope outlined here, compensation may vary accordingly. At Particle Health, we believe diversity is a strength that drives and fuels our mission to transform healthcare. We are proud to be an equal opportunity employer and are committed to creating an inclusive, supportive environment where everyone can thrive. We welcome and celebrate individuals of all backgrounds, perspectives, and experiences, regardless of race, religion, color, national origin, gender, sexual orientation, age, marital status, veteran status, or disability. Our commitment to diversity reflects our core valuesintegrity, curiosity, boldness, ownership, and persistenceand our belief that our differences make us stronger as a team and a company. Notice: Recruitment Scam Alert We've been made aware of attempts by scammers impersonating Particle Health or our team members to post fake job listings, conduct fraudulent interviews, or issue fake offer letters. These scams may involve: Requests for personal or financial information Interviews conducted only via text or messaging apps Emails that don't come from an @particlehealth.com address Offers for jobs you didn't apply for Please note: We will never ask for money, gift cards, or personal financial details at any stage of our hiring process All legitimate communication will come from an official @particlehealth.com email address Our hiring process always includes video interviewsnever just text If you're unsure about the legitimacy of a communication, don't hesitate to contact us at hiring@particlehealth.com.