Build subscription data export pipeline with incremental sync and conflict resolution

[Smartdevs17]

Context

Enterprise users need to export their subscription data into external systems (ERP, CRM, accounting platforms) with reliable incremental sync rather than full daily dumps. The current export service (backend/services/exportService.ts) only supports full snapshot exports, which become prohibitively expensive at scale and create data freshness gaps.
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Current Limitation

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• Full exports only; no incremental change tracking
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• No export watermark/checkpoint mechanism
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• Missing conflict resolution when external systems modify synced records
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• No retry logic for partial export failures
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• Export format is fixed; no pluggable format adapters
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Expected Outcome

An incremental export pipeline with change data capture (CDC), configurable export formats (CSV, JSON, Parquet), watermark-based checkpointing, retry with idempotency guarantees, and bidirectional conflict resolution for supported integrations.
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Acceptance Criteria

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• Change data capture tracks subscription mutations with ordered log sequence numbers
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• Incremental export fetches only records changed since last watermark
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• Configurable export formats: CSV, JSON, Parquet (schema evolution supported)
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• Export idempotency: re-running same watermark produces identical output
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• Conflict resolution strategy for bidirectional sync scenarios
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• Retry with exponential backoff for partial export failures
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• Export metrics dashboard: records exported, latency, error rate, data volume
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• Integration tests with mock external systems
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Technical Scope

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• Files: backend/services/exportService.ts, backend/services/subscription/subscriptionEventStore.ts, backend/services/billing/accountingExport/, backend/services/shared/apiResponse.ts
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• APIs: Export format adapters, watermark store (PostgreSQL/Redis), CDC log
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• Edge cases: Schema changes mid-stream, deleted records in incremental sync, timezone handling across export windows, large batch exports (>1M records), concurrent export runs

[IFEANYIBRIGHT]

@IFEANYIBRIGHT has applied to work on this issue as part of the Stellar Wave Program's 6th wave.

Hi! I’m a full-stack developer with a strong blockchain background. I’d love to handle this issue and can deliver a clean, reliable solution. Kindly assign it to me.

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[distributed-nerd]

@distributed-nerd has applied to work on this issue as part of the Stellar Wave Program's 6th wave.

can i work on this

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[drips-wave]

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