A dynamic reporting engine that turns document and spreadsheet templates into finished client deliverables — pattern-driven find-and-replace over performant, DRY SQL, eliminating 95%+ of the hand-coding each report used to require.
Producing client reports used to mean writing bespoke code for each new deliverable. This engine replaces that with a template-driven pipeline: a document or Excel template carries the structure and a set of well-defined placeholder patterns, and the engine resolves them with live data in a predetermined, repeatable way.
The result is that a new report type becomes a matter of authoring a template — not writing and maintaining yet another one-off codebase. I owned it end-to-end, from conception to ship.
Built for a client, so the deep specifics stay private — what follows is the shape of the system and the engineering behind it.
Excel and document templates hold both the layout and a set of placeholder patterns. The output’s shape lives in the template, so a new deliverable doesn’t require touching the engine.
A refactored regex pipeline finds each placeholder and replaces it with the right data, deterministically. The find-and-replace is the hot path, so it was rebuilt for both correctness and speed.
Pluggable adapters map each report or template family to its data, isolating per-deliverable variation from the engine core — new shapes plug in without destabilizing what already ships.
A shared, tuned query layer feeds the engine. Overlapping queries were consolidated into reusable, performant statements instead of copy-pasted SQL scattered per report.
Placeholder resolution runs on every report, so the find-and-replace logic was refactored for correctness and performance rather than left as the bottleneck it had been.
Reporting queries were made DRY and performant — one tuned, reusable query layer rather than near-duplicate statements maintained per deliverable.
The adapter pattern keeps client- and report-specific differences out of the core, so the engine stays small while the catalog of supported deliverables grows.
Generated documents match the client’s exact formatting expectations — high-quality output that drops straight into the deliverable without manual cleanup.
| Core | C# / .NET | Owned end-to-end, conception to ship. |
| Templating | Excel & document templates | Structure and placeholder patterns authored, not coded. |
| Substitution | Refactored regex pipeline | Deterministic find-and-replace; rebuilt for speed. |
| Data | DRY, tuned SQL | One reusable, performant query layer. |
| Pattern | Adapter | Per-deliverable variation isolated from the core. |
| Impact | 95%+ less custom code | Per-report hand-coding all but eliminated. |