Model the problem first
I turn product rules into clear data and workflows before adding implementation complexity.
KVN / EngineeringApproach through real systems
ENG / Practice
How I build systems
Most of my work starts with understanding the rules behind a product, deciding where responsibilities belong, and keeping important state changes predictable. The implementation differs between projects, but these are approaches I tend to reuse.
Practice / From rules to change
Approaches I reuse
Each project link shows where I used the approach and opens the detailed implementation and decisions behind it.
Keep responsibilities clear
I give each part of a system a clear job, including who can perform an action and where that rule is enforced.
Protect important state changes
I keep multi-step changes predictable, especially when balances, approvals, payments, or shared records move together.
Treat integrations as boundaries
I keep external services and devices behind application-owned interfaces so provider details do not spread through the system.
Design for change
I separate background work, runtime concerns, and performance-sensitive paths so they can change without reshaping the whole product.