Mendix Expert Developer case studies
Mendix Expert Developer · Put your knowledge to work in context.
The Mendix Expert Developer credential is an advanced certification aimed at developers who already build Mendix applications fluently and want to demonstrate depth across the whole platform lifecycle, not just page building. It suits lead developers, solution architects, and senior engineers who own domain models, design integration layers, harden security, tune performance, and run CI/CD pipelines. The exam is scenario-driven: expect to reason about trade-offs - a polymorphic association versus a copy, a microflow versus a scheduled event, a REST call versus an import mapping - rather than recall menu locations. Content spans domain modeling and data architecture, microflows and application logic, security and access control, integration, performance tuning, deployment and cloud operations, modularity and reuse, testing and troubleshooting, and version control with DevOps. The Mendix Expert Developer case studies are 5 cases and about 4,006 words.
1Configurable Claim Types Without an EAV Trap
An insurance platform built on Mendix 10 stores 4.2 million Claim records in PostgreSQL and adds about 18,000 claims per month. The domain model has a Claim generalization with AutoClaim, PropertyClaim and LiabilityClaim specializations.
798 words, about 4 min2Payment Retries That Must Not Charge Twice
A checkout microflow named ProcessOrder runs synchronously: it creates an Order, calls a payment provider REST endpoint with a 10-second timeout, sets PaymentStatus, sends a confirmation email, and decrements inventory. Peak load is 1,400 orders per hour; the payment provider's p99 latency is 3.5 seconds and its p99.9 is 14 seconds.
793 words, about 4 min3Tenant Isolation in a Shared Mendix SaaS
A shared-database SaaS application hosts 52 housing associations. Every tenant-scoped entity has an association to Tenant, but AuditLog and Setting do not.
786 words, about 4 min4Nightly SAP Sync That Times Out
Every night at 01:00 a scheduled microflow imports product master data from SAP. The SOAP service returns at most 5,000 products per page and has 45,000 active products.
818 words, about 4 min5Hotfix vs Sprint Branch on a Shared Mendix Model
Nine developers work on a Mendix 10 app using Git in Azure DevOps. They release every two weeks from main; feature branches live for the whole sprint.
811 words, about 4 min