Principal Software Engineer (Full Stack, Backend-Focused)
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Requirements
• 10+ years of professional full-stack software engineering experience with a focus on backend and distributed systems • Proven success building and scaling identity and access management systems, including authentication (SAML 2.0, OAuth2, JWT) and fine-grained authorization frameworks • Expertise in TypeScript, Node.js/NestJS, and modern React/Angular development for full stack delivery • Strong command of cloud architecture (AWS preferred) and IaC practices with Terraform • Deep experience with relational and NoSQL data stores, designing for vertical & horizontal scalability and high availability • Demonstrated ability to own complex systems from design through rollout and post-release operation, with strong attention to quality and reliability • Excellent collaboration skills and the ability to work across engineering, product, and SRE teams to deliver cohesive, secure systems • Strong communication and architectural reasoning skills—able to balance pragmatism with long-term technical health • Passion for mission-driven work improving healthcare outcomes and enabling data-driven care delivery • ## Would Love for You to Have • Experience modernizing identity and access systems or other critical, cross-cutting platform services • Familiarity with API gateway design, centralized JWT validation, and event-driven architectures • Exposure to data streaming or message-driven systems (Kafka, Kinesis, SNS/SQS) • Experience in healthcare technology, HIPAA compliance, or other regulated data environments • Polyglot engineering experience—comfort working across multiple languages and frameworks (e.g., Python, Java, Go) when solving complex distributed system challenges • Experience working with high-scale analytics platforms or distributed data processing frameworks (e.g., Apache Spark jobs), especially in environments integrating operational and analytical data pipelines • ## What You'll Get
Responsibilities
• Leading the rearchitecture and implementation of the User Management platform—the foundation for authentication, authorization, and access control across Arcadia products • Building backend services and APIs (NestJS, TypeScript, PostgreSQL) supporting secure, multi-tenant access models • Designing distributed, event-driven systems to synchronize user data and access events across Arcadia applications • Driving modernization of existing authentication and provisioning flows (Auth0, SAML 2.0, OAuth2, JWT) • Managing cloud infrastructure through Infrastructure-as-Code (Terraform) and AWS-native services (ECS, S3, SNS, Aurora) • Defining SLOs and designing telemetry for key features, ensuring robust monitoring, canary, and standard rollout strategies • Partnering with cross-functional stakeholders—including Product, Security, and SRE—to ensure alignment between technical execution and organizational priorities • Providing leadership, mentorship, and clarity in complex, ambiguous problem spaces • Joining the engineering on-call rotation, contributing to the reliability and operational excellence of the User Management platform and related services • Ensuring that documentation, operational runbooks, and best practices are well maintained and available for peers and downstream teams
Benefits
• Arcadia’s mission is to improve healthcare outcomes through better data and smarter technology. A critical pillar of this mission is the User Management system, which governs authentication, authorization, and user provisioning across all Arcadia’s applications. • We’re looking for a Principal Software Engineer to take technical ownership of this area—leading the rearchitecture and implementation of a robust, scalable, and secure access control framework. By the time you join, the team will have completed key architectural planning decisions; your focus will be on translating that architecture into reality. • This is a backend-leaning full stack role (approximately 60/40) requiring deep distributed systems expertise and an ability to balance implementation detail with architectural vision. • What Success Looks Like • Ramp up on the existing User Management system, including authentication (Auth0, SAML 2.0), authorization models, and event-driven user provisioning workflows • Complete design handoff for the new access and grants architecture, collaborating closely with product and platform teams to understand business and security requirements • Begin staged implementation of the new system, focusing on core backend services and foundational APIs • Lead the implementation of a database-backed access control framework that replaces legacy patterns and improves performance, consistency, and scalability • Drive integration of new user and access models into key Arcadia applications, ensuring minimal disruption for internal and external users • Collaborate with SRE and infrastructure teams to strengthen IaC, deployment automation, and observability for User Management services • Own and operate a fully modernized User Management system that delivers secure, reliable, and high-performance authentication and authorization at scale • Introduce a centralized JWT validation and API gateway strategy to unify access control across services and reduce duplication of logic • Establish technical and operational excellence practices—measurable improvements in reliability, latency, and operational efficiency • Mentor engineers and guide teams across Arcadia in secure, distributed, and scalable system design • Arcadia is dedicated to happier, healthier days for all. We believe that there is a better healthcare world – one powered by data. Our platform transforms complex, diverse data into a unified foundation for health, helping organizations deliver better care, boost revenue, and lower costs. • We’re a team of fiercely driven individuals committed to making healthcare more sustainable—and we’re looking for passionate people to help us get there. • For more information, visit arcadia.io.