Enterprise B2B Platform

The Challenge

The codebase had a reputation. SQL queries lived next to UI components. Validation happened... sometimes. Tests? What tests? Nobody wanted to touch it, but the business needed new features yesterday.

My Approach

I didn't propose a rewrite—that's how projects die. Instead, I introduced boundaries gradually. Clean Architecture emerged one module at a time. Every PR shipped value while improving the foundation underneath.

Key Contributions

• Migrated flat file structure to Clean Architecture (controllers → services → repositories)
• Replaced manual validation with Zod schemas and type inference
• Built background job system with pg-boss for async operations
• Architected modular CI/CD with reusable GitHub composite actions
• Implemented security scanning (Gitleaks, npm audit, Trivy)
• Designed multi-environment Terraform architecture with state isolation
• Established Playwright E2E testing with Page Object pattern and 4-way sharding

Impact

• New developers ship features in their first week
• CI runs only what changed—deploys are fast again
• Bug rate dropped as test coverage climbed
• Security vulnerabilities caught before they reach production
• Infrastructure changes are reviewed like code, not YOLO'd

Tech Stack