TRAINING PROJECT

Apex backend development (iDEM Connect)

Development of an Apex backend for iDEM Connect: trigger, service classes and batch scheduler.

Context

iDEM Connect is a global internet service provider (€1.8B revenue, 3,950 employees). Frédéric Lambert, senior Salesforce architect, needed a complete Apex backend to manage customer subscriptions on Account and Order objects. The mission covered writing technical specifications, developing Apex components (trigger, service classes, batch, scheduler) and delivering test coverage above 75%.

Technical Scope

Apex Trigger on Account and Order — delegates business logic to service classes (handler pattern)
3 Apex service classes implementing the business feature grid
Batch Apex for bulk processing of the subscription lifecycle
Apex Scheduler for automatic daily batch scheduling
Unit tests with 3 scenarios per method — coverage above 75% on all classes
Complete PDF documentation: classes, methods, parameters and test cases

Apex Best Practices Applied

Zero DML and SOQL inside FOR loops — all queries externalized
Handler pattern: triggers with no direct logic, clear separation of concerns
Full bulkification — correct processing of 1 to 200 records per transaction
Code coverage above 75% on each Apex class (platform requirement)
Salesforce naming conventions respected (classes, methods, variables)

Stack & Technologies

Apex — Triggers, Service Classes, Batch Apex, Schedulable
SOQL — Queries on Account, Order and related objects
Salesforce DX — Deployment and metadata management
Apex Test Framework — @isTest, Test.startTest/stopTest
PDF Documentation — Complete technical specifications

Project Timeline

1
Specifications
Feature grid analyzed, detailed technical specs written for the 3 business features
2
Trigger & Handler
Account/Order Trigger built with handler pattern — business logic delegated to dedicated service classes
3
Service classes
3 business features implemented in specialized Apex classes, each method unit tested
4
Batch & Scheduler
Batch Apex for bulk subscription processing and Scheduler for daily automated execution
5
Tests & Coverage