Backend Systems & API Engineering
Reliable backend systems, robust APIs, and relational database architectures.
Engineering leads, CTOs, and founders seeking solid API engineering, clean database design, or refactoring for slow database queries.
- RESTful and GraphQL API services
- Node.js, Express, and NestJS server architectures
- PostgreSQL and MongoDB relational/document modeling
- Type-safe database layers with Prisma ORM and Drizzle ORM
Architectural Pillars
1. Normalized Relational Models
Carefully designed PostgreSQL schemas with foreign keys, composite unique constraints, and deliberate indexing that prevent corrupt states.
2. Type-Safe Contract APIs
End-to-end type safety between backend and frontend via TypeScript, Zod schema validation, and structured error responses.
3. Idempotent Integrations
Payment and third-party webhook handlers designed with idempotency keys to ensure duplicate events never cause double-charges or corrupted logs.
Featured Backend Implementations
Salon Management System
A purpose-built operational platform for local salons featuring appointment scheduling, point-of-sale checkout, customer visit tracking, and staff commission calculations.
Bespokible
An interactive product customization and bespoke ordering engine that bridges dynamic client-side visual configuration with secure server-side pricing and payment workflows.
Slimify
A fast, edge-optimized URL redirection platform engineered for low latency link resolution, UTM parameter tracking, QR code synthesis, and analytics aggregation.
Backend & API FAQ
Can you work with an existing backend or legacy database?
Yes. I routinely audit existing schemas, add Prisma or Drizzle ORM layers, optimize slow queries through proper indexing, and build backwards-compatible API extensions.
PostgreSQL or MongoDB: which do you recommend?
For 90% of business applications involving transactions, orders, users, and schedules, PostgreSQL with relational constraints is the most reliable choice. MongoDB is great for unstructured logs, flexible dynamic documents, or catalogs.
How do you ensure API security?
All endpoints implement strict input sanitization, parameterized queries to prevent SQL injection, rate limiting against brute-force attacks, and scoped authorization tokens.
Need reliable APIs or a modern relational database?
Let's map out your entity models and design an API layer built for scale and maintainability.