Temporal Workflow Orchestration

This demo shows what durable execution looks like in practice. A multi-step business process — built with Temporal, NestJS, and AWS — runs to completion reliably, even when workers crash, deploys happen mid-run, or a step waits days for a human to approve it.

What it demonstrates

• Durable state — kill a worker mid-workflow and execution resumes exactly where it left off. No lost progress.
• Human-in-the-loop — the workflow pauses for an approval signal and waits patiently (seconds or days) before continuing.
• Built-in retries & timeouts — flaky activities retry automatically with backoff, declared right in the code.
• Event-driven — the workflow reacts to external events and signals as they arrive.

How it works

1. The workflow is written as ordinary TypeScript and orchestrated by Temporal.
2. Activities call out to services (via NestJS) and AWS resources.
3. A human approval step is modeled as a signal — the workflow blocks until it’s received, with full state preserved.
4. The Temporal UI shows the complete, replayable history of every execution.

Why it matters

For processes that must not lose state — order fulfilment, onboarding, financial operations, long-running AI agents — durable orchestration turns “hope it doesn’t fail halfway” into a guarantee.

This pattern is the backbone of our Workflow Automation engagements: workflow architecture, human-in-the-loop, and event-driven systems.