Sr Software Engineer (Backend)

Ascension is a nonprofit Catholic health system focused on serving communities through healthcare. The Senior Software Engineer (Backend) will build and operate secure production backend systems using AWS serverless technologies, Node.js, and TypeScript, while integrating authentication, third-party services, data platforms, and enterprise systems.

Requirements:

• 5+ years building production backend systems, 2+ years on AWS serverless (Lambda, API Gateway, EventBridge or equivalent)
• Strong Node.js/TypeScript backend proficiency
• Experience with authentication/identity systems (Cognito, Auth0, OIDC/SAML), including MFA for customer-facing apps
• Experience integrating with third-party REST APIs and building secure hand-offs to external services (signed tokens, no PII in query strings)
• Strong data modeling experience (PostgreSQL, DynamoDB, or similar), including migrations and tested backup/restore
• Infrastructure-as-code experience (CDK, Terraform, or SAM), practical observability experience — structured logging, alerting, on-call ownership
• Security-first mindset — secrets management, least-privilege IAM, input validation at every boundary
• High School diploma equivalency with 2 years of cumulative experience OR Associate's
  degree/Bachelor's degree OR 4 years of applicable cumulative job specific experience required
• Experience integrating with a third-party billing/payments SaaS (redirect-based or lightweight status API)
• Enough React/TypeScript familiarity to unblock or pair with the frontend engineer
• Experience with EventBridge Scheduler, Step Functions, or similar orchestration
• Prior experience on a 2–3 person team owning production systems post-launch
• Experience integrating with accounting/ERP systems (QuickBooks, NetSuite, or similar)