Development

Development Structure

A modular, scalable architecture with clear separation of concerns across backend services, mobile clients, and admin interfaces — backed by comprehensive testing.

Backend Services

  • Modular services (controllers, services, repositories)
  • Environment-based configuration
  • API gateway with standardized rate-limits
  • Security baseline: JWT, RBAC, input sanitization
  • Audit logs across all workflows
  • Async job layer for report generation
  • OpenAPI-first documentation
  • Versioned API contracts & error dictionary

Mobile Clients

  • Single codebase across Android, iOS, and web
  • API layer abstraction with error handling
  • Component-level validation
  • State management with predictable patterns
  • Reusable UI component library
  • Offline-first caching strategy

Admin Portal

  • Modular routing & dashboard widgets
  • Role-based UI rendering per persona
  • Reusable form components with validation
  • Print integrations (55mm / 80mm / A4)
  • Data tables with filtering, sorting, pagination
  • Responsive layouts for desktop & tablet

API & Data Contracts

OpenAPI-first

All APIs documented before implementation.

Versioned Contracts

Backward-compatible versioning.

Schema Validation

Schema-level validation on every endpoint.

Error Dictionary

Standardized error codes across modules.

Rate Limiting

Configurable limits at the gateway.

Pagination

Consistent cursor/offset pagination.

Phase-Wise Development

Phase 1.1

Foundations — Architecture & DB

  • • High-level and module-level architecture diagrams
  • • DB ERD and complete schema definitions
  • • Sequence diagrams (lot flow, billing, settlement)
  • • Infrastructure blueprint and environment setup
  • • Persona-to-module mapping with role hierarchy
Phase 1.2

Backend Foundation

  • • Service project foundation and folder structure
  • • Authentication modules (JWT + RBAC)
  • • API gateway connectivity and middleware
  • • Swagger skeleton and core entity models
Phase 1.3

Core Backend Functionality

  • • Lot management, weighing interface, and billing APIs
  • • Commission engine and ledger calculations
  • • Reporting APIs and accounting exports
  • • First full Postman collection set
Phase 1.4

Frontend & Integration

  • • Mobile: login, profiles, market visibility, discovery
  • • Admin: lot screens, workflow, billing dashboard, ledger
  • • End-to-end integration and workflow stitching
Phase 1.5

Internal QA & Freeze

  • • Full backend stabilization and integration verification
  • • Business logic validation against requirements
  • • Bug fixing and performance tuning before code freeze
Phase 1.6

Release & Handover

  • • Final regression across all modules
  • • Technical documentation and user guides
  • • Deployment plan and launch readiness