Event-driven architecture in wealth management
Events tell a wealth workflow that something changed. Learn how webhooks, polling, and delivery controls keep that signal separate from a completed outcome.
Event-driven architecture in wealth management connects systems through notifications that something happened, such as a document package reaching a new state. A receiving system uses that signal to update context or start permitted work. Unlike polling, which repeatedly asks for the latest status, an event-driven connection sends a notification when its producer detects a change.
The distinction matters when client work crosses a signing provider, custodian, shared workspace, and operations team. A notification can prompt the next check, but it does not prove that an account is ready or a client request is complete. Reliable workflows keep the event, the authoritative record, and the business outcome separate.
For wealth firms, the useful shift is away from repeated manual status checks toward defined system handoffs. That does not mean eliminating polling, batch feeds, or human review. It means choosing how each change becomes visible and what the receiving system may do with it.
What an event-driven workflow contains
Microsoft's event-driven architecture guidance describes producers, consumers, and channels that carry events between them. Applied to a wealth workflow, those roles might be:
- A signing provider that detects a package-status change.
- A notification channel that carries the change to another system.
- A case-management process that checks the package and decides whether a step can progress.
This is an illustrative design, not a published OneVest event contract. The exact events, payloads, and allowed actions depend on the connection.
A webhook is one delivery mechanism. It typically sends an HTTP request to a receiving endpoint. An API query asks a system for data or requests an action. A webhook can tell a consumer to query that API for current state; the two mechanisms complement each other.
Event-driven architecture also differs from event sourcing. Receiving notifications does not establish that a system stores every historical change or can reconstruct its full state. Verify history and retention separately.
When webhooks, polling, and batch updates fit
Choose the mechanism around the decision, not a preference for the newest transport.
Webhooks fit supported changes that need a timely response. A document-status notification might prompt a case check without waiting for the next scheduled query. The connection still needs documented event coverage, delivery behavior, and a recovery path.
Polling fits systems that expose status but do not provide the required notification. It can also check whether a received event still matches the authoritative record. Set the interval around workflow urgency, provider limits, and acceptable staleness. A polling result is current only as of its observation time.
Batch updates fit data supplied on a defined schedule. A nightly position file has a different purpose from a signing-status notification. Calling both "connected data" should not hide that difference from the person making a decision.
OneVest's live pages reflect this mixed approach. Core describes APIs, developer tools, MCP, and webhooks. Operate describes account-opening status tracking and polling. Neither description establishes a universal event catalog or latency guarantee across every provider.
Keep receipt separate from completed work
A successful delivery response answers a narrow question. The endpoint received and acknowledged the request. It does not, by itself, answer whether downstream processing succeeded, a required approval occurred, or the client-facing outcome is ready.
Stripe's webhook documentation illustrates this distinction by recommending a quick successful HTTP response and asynchronous handling of complex work. Its guidance is an independent technical example, not evidence that Stripe is a OneVest integration or that OneVest uses Stripe's delivery rules.
Define separate evidence for receipt, processing, and business completion. An advisor should see that a case is awaiting action rather than infer completion from a successful technical callback. Operations needs an owner for accepted notifications that fail later, as well as notifications that never arrive.
Design for duplicate and delayed events
Retries and parallel processing make event delivery more complex than a single clean demonstration. Microsoft documents ordering and consistency challenges; Stripe explicitly warns that its events can arrive more than once or out of order. Confirm the actual guarantees of each provider rather than copying another provider's rules.
Prevent repeated side effects
An idempotent operation has the same effect when repeated as when performed once. Microsoft's idempotent consumer pattern uses a stable message or operation identifier and persistent processing evidence to recognize repeats.
For a wealth case, the design objective might be one follow-up task for one logical transition, even if the notification is delivered again. Deduplication must remain consistent with the business update; a separate check and later write can leave a failure window. A case identifier groups related work, but does not uniquely identify every change within that case.
Avoid moving state backward
A delayed notification should not overwrite a newer, confirmed state. Determine whether the provider supplies reliable version or sequence information, whether the consumer must retrieve current state, and how conflicting evidence is resolved. Removing duplicate deliveries does not solve ordering.
Make failed processing visible
Document who owns undelivered, rejected, or unprocessed events. Define how the team identifies affected cases and recovers them without repeating completed actions. If replay or an error queue is available, verify its limits and access controls. Do not assume those facilities exist because a webhook endpoint exists.
Limit the data and authority carried by an event
Subscribe only to changes the workflow needs. Decide whether a notification should carry full client data or an identifier that permits an authorized lookup. Microsoft's architecture guidance explains the tradeoff between richer payloads and retrieving data from an authoritative source; it also warns about unintended information exposure across consumers.
Verify the producer using its documented authentication mechanism. Stripe's signature verification is one concrete example, not a OneVest specification. Keep sensitive content out of unnecessary destinations and operational logs.
A valid notification is not permission to perform any downstream action. The receiving process still needs the right account context, service permissions, and configured approvals. A package-state change may allow a review task to begin; it should not silently authorize a different client instruction.
Test one case across the whole path
Use a controlled test environment and a hypothetical document-signing case. Ask the implementation team to demonstrate:
- A valid notification that prompts the expected state check.
- A duplicate delivery that does not create duplicate work.
- A delayed change that does not replace newer evidence.
- An acknowledged event whose downstream processing fails visibly.
- A recovery attempt that preserves already completed steps.
- An unauthorized or invalid notification that cannot trigger work.
Measure source-change time, receipt time, processing time, and outcome confirmation separately. This exposes where the delay occurs without inventing a single "real-time" label. Agree on acceptable freshness and recovery behavior for this workflow, not an unsupported firm-wide promise.
OneVest's integration directory describes supported connections and their workflow coverage. Confirm the event and status mechanisms for your exact providers. Operate describes signing-status tracking, case progression after all signers complete, and configured approvals. Those are relevant product capabilities, not proof that every failure scenario is already resolved in your implementation.
Explore OneVest Operate to discuss the status checks, permissions, and handoffs your firm's workflows require.