Senior Full Stack Developer
First seen by Alion on Sep 4, 2026.
The Role :
We're seeking a Senior Full-Stack Developer (8+ Years) to lead the design and implementation of four independent React SPAs backed by Node.js microservices. You'll work alongside our AWS Solutions Architect to modernize a legacy Salesforce-based system while maintaining HIPAA compliance and zero downtime for active providers.
Required Qualifications :
- 5+ years building production React applications
- 5+ years building production Node.js applications (Express or similar)
- 3+ years working with PostgreSQL or similar relational databases
- 2+ years AWS cloud services (EC2, ECS, RDS, S3, IAM, CloudWatch)
- 2+ years leading or mentoring other developers
- Proven ability to ship features end-to-end (design - deployment)
- Experience migrating legacy systems to modern architectures
Technical Stack :
- Frontend : React 18+, TypeScript, Tailwind CSS, TanStack Query, Redux/Zustand
- Backend : Node.js, Express.js, PostgreSQL, Redis
- Cloud : AWS (ECS/Fargate, RDS, S3, CloudFront, CloudWatch, SNS/SQS)
- DevOps : Docker, GitHub Actions, Terraform/CloudFormation
- Tools & Monitoring : Datadog/CloudWatch, Sentry, GitHub, Jira
Preferred Qualifications :
- Healthcare/HIPAA experience - Previous work on HIPAA-compliant systems
- Salesforce integration - Experience with Salesforce REST APIs, OAuth, JWT
- GraphQL - Query language experience
- Microservices architecture - Built or worked with microservices systems
- AWS Advanced - Lambda, SNS/SQS, Cognito, API Gateway
- Data-heavy applications - Built systems handling 100M+ records, complex reporting
- Claims processing - Understanding of healthcare billing, claims workflows, RCM
- ABA therapy domain - Knowledge of autism therapy, therapy management, insurance billing
- Distributed team experience - Worked across US/India time zones, asynchronous collaboration
Skills
Full Stack, React.js, Node.js, Microservices Architecture, Express.js, PostgreSQL, AWS, TypeScript, Redux