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ARCHITECTURE CASE STUDY // E-COMMERCE & OPENAPI SERVICES

Sip & Snug

E-Commerce System & RESTful API

MY ROLE
Backend API Engineer
CLIENT / CONTEXT
Food & Beverage E-Commerce
TIMELINE & STATUS
Production System
INTERACTIVE SYSTEM RUNTIME VISUALIZATION
REST_API // SANCTUM_TOKEN_AUTH
ENGINEERING SCHEMATIC
API GATEWAY
Sanctum Auth
Token Bearer AuthenticationRate Limit: 60 req/min
Strict FormRequest Validation
BUSINESS LOGIC
Order & Cart State
Dynamic Delivery ZonesCart Reservation Lock
Eloquent Eager Loading Guard
DOCUMENTATION
L5-Swagger OpenAPI
OpenAPI 3.0 ContractSynchronized Endpoints
Automated Route Schema Sync
CONTRACTOpenAPI 3.0
SECURITYSanctum Protected
[GATEWAY] REST endpoints verified against OpenAPI 3.0 schema contract

The Engineering Challenge

Developing a high-throughput API with dynamic delivery zone calculation, concurrent cart reservation, and automated Swagger/OpenAPI documentation for client teams.

Built an end-to-end backend system powering both mobile and web clients through secure, token-based API endpoints (Laravel Sanctum), dynamic carts, delivery zones, order fulfillment, and interactive OpenAPI 3.0 documentation.

Core Architectural Responsibilities

  • Engineered token-authenticated RESTful API endpoints using Laravel Sanctum.
  • Designed relational schema for complex product add-ons, modifiers, and variable pricing.
  • Generated interactive OpenAPI 3.0 documentation using L5-Swagger.
  • Implemented strict FormRequest validation classes enforcing complete data integrity.

System Architecture

Requests arrive via HTTPS, validated against strict FormRequest rules, dispatched through dedicated service classes, and persisted via Eloquent with eager loading to prevent N+1 bottlenecks.

Laravel Sanctum

API Gateway

Token authentication and rate-limited endpoints.

L5-Swagger

OpenAPI Documentation

Automated Swagger interactive API specifications.

Laravel Services

Cart & Order Pipeline

Atomic checkout and order status state machine.

MySQL 8.0

Database Cluster

Relational store for menus, variants, and customer histories.

Key Technical Decisions & Trade-Offs

Eager Loading Query Guard

Prevented N+1 database queries across nested product add-on relationships using Eloquent with() constraints.

L5-Swagger Automated Annotations

Ensured that documentation never drifted from implementation across rapid deployment sprints.

Technologies Deployed

Laravel 13MySQL 8L5-SwaggerLaravel SanctumEloquent ORM

Lessons Learned & Retrospective

  • Observation #1: Contract-first OpenAPI development accelerates mobile frontend integration significantly.
  • Observation #2: Dynamic delivery distance calculations should be cached in Redis with geohash keys.

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