Jesse Ian Cary
Full-Stack Software Engineer / Architect
Tucson, AZ
I'm a software engineer and application architect with 18 years of experience owning products end to end - from business need through architecture and hands-on implementation to production. I specialize in multi-tenant SaaS platforms and secure systems for regulated domains, including PCI DSS Level 1 payments and HIPAA-governed healthcare (HL7/EMR) integrations. Below are side projects I've built, each with source code and a live demo. I'm currently looking for a full-time role in fintech, healthtech, or SaaS.
Skills
Architecture & Systems
- Application Architecture
- Domain-Driven Design
- Multi-Tenant SaaS
- Distributed Systems
- System Design
- Shared Services
- Legacy Modernization
- RBAC
Payments & Security
- Payment Processing
- Tokenization
- Stored Credentials
- 3-D Secure (3DS)
- PCI DSS Level 1
- Fraud Detection
- Chargebacks & Disputes
- Clover
- WorldPay
- Braintree
- PayEezy
- PayPal
- Apple Pay
- Google Pay
Healthcare & Compliance
- HL7 v2/v3
- MLLP
- HIPAA
- EMR / EHR Integrations
- HIS / LIS / PACS
- Data Mapping
APIs & Integration
- REST API Design
- Webhook Design
- OpenAPI / Swagger
- Event-Driven Integration
- API Versioning
- Fault Tolerance & Recovery
- OAuth
Languages & Frameworks
- TypeScript
- JavaScript (ES6+)
- C# / .NET
- SQL
- Node.js
- Express
- Angular
- React
Data & Caching
- MongoDB
- SQL Server
- Redis
- Mongoose
- Database Design
- Database Migrations
Cloud & DevOps
- AWS
- Docker
- CI/CD
- GitHub Actions
- Observability
- Automated Testing
