A lot of integration problems are not really about the API call itself.
They show up when the external system is delayed, duplicated, partial, or wrong — and your internal workflow still needs to stay reliable.
That’s where backend design starts to matter:
- clear state transitions
...
Java backend systems for API integrations and workflow-heavy operations
I build Java / Spring Boot backend systems for projects where API integrations, workflows, and data reliability matter in the real world.
The kind of work I’m strongest in usually involves:
- third-party API...
Published a new Contra project:
Payment Lifecycle Integration Backend
This project focuses on a backend problem I care about a lot:
how to keep an internal payment workflow correct when the external provider is asynchronous and outside your control.
The system models:
· explicit...
I’ve been exploring how AI can assist operational decision-making while keeping systems reliable and explainable.
This demo shows how AI signals, rule-based scoring, and workflow routing can work together in real business environments.
It includes idempotent processing and audit...
github.com
GitHub - qingfan007/ai-assisted-decision-workflow
Contribute to qingfan007/ai-assisted-decision-workflow development by creating an account on GitHub.
Building systems that explain themselves
I’ve been working on a demo exploring deterministic rule engines and explainable scoring.
Instead of black-box logic, this engine produces:
✔ a score
✔ confidence level
✔ explicit reasoning
Because in compliance and decision workflows,...
