Engineering Notes
Architecture decisions and lessons learned while building real enterprise systems in production.
This section documents ideas, patterns and technical decisions that emerged while designing ERP platforms, financial systems and backend architectures running in production environments.
Architecture
Boundaries, service decomposition, and platform decisions shaped by real ERP constraints.
Defining ERP domain boundaries before modules start to scale
How Businext ERP separates each business area — CRM, inventory, sales, finance, human resources and suppliers — into independent modules mounted as FastAPI applications. The goal is to let each domain evolve without breaking the overall operation of the system.
Published
2026-03-09
Reading time
8 min read
ERP platform architecture for real-world operations
A practical view of ERP architecture based on Businext: a modular monolith built with FastAPI where each business area runs as an independent mounted module within the same backend platform.
Published
2026-03-09
Reading time
10 min read
Why Businext uses a modular monolith
A practical analysis of why a modular monolith was the right choice for Businext ERP: lower operational complexity, simpler deployments, direct integration between domains, and faster evolution for a small engineering team.
Published
2026-03-09
Reading time
10 min read
Backend Engineering
Implementation patterns for service layers, APIs, and operational reliability in production.
Designing FastAPI services around business transactions instead of CRUD
Why enterprise APIs should model business actions — payments, approvals, reconciliations, or movements — instead of directly exposing CRUD operations over tables.
Published
2026-03-09
Reading time
9 min read
FastAPI service layer patterns for enterprise systems
How to structure routers, schemas, and services to keep business logic isolated and prevent APIs from becoming simple database wrappers.
Published
2026-03-09
Reading time
10 min read
Financial Systems
Credit, reconciliation, and transactional controls where correctness matters more than CRUD.
Consistency controls for credit, payment, and interest workflows
Implementation patterns that reduce duplicate events, invalid state changes, and reconciliation drift in financial platforms such as TR0V1.
Published
2026-03-09
Reading time
9 min read
Reconciliation jobs as systemic control in financial platforms
Why reconciliation jobs should be designed as a continuous control mechanism that detects inconsistencies between payments and charges, generates operational alerts, and preserves financial integrity in credit platforms such as TR0V1.
Published
2026-03-09
Reading time
8 min read