John Doe — Staff Data Analyst & Decision Scientist

// 02. INTERACTIVE DATA ESSAY (SCROLL OR CLICK STEPS)

The Anatomy of a $14.2M Revenue Leak

How isolating 260 behavioral micro-cohorts across 18M checkout events uncovered an invisible mobile API latency bottleneck.

PHASE 01 // RAW TELEMETRY CHAOS 18.4M EVENTS

Blended Metrics Masked the Bleed

Top-line conversion looked stable at 3.42% because surging desktop enterprise traffic offset a silent collapse in mobile checkout completion.

PHASE 02 // COHORT ISOLATION 4 ACQUISITION CHANNELS

Stratifying by Channel & Device

Using DuckDB & Polars, we decomposed the 260 particle clusters into four acquisition bands: Organic, Paid Search, Partner API, and Enterprise.

PHASE 03 // CAUSAL BOTTLENECK p = 0.00002

Checkout v4.2 Latency > 1,800ms

Propensity-score matching isolated the exact culprit: uncached tax-calculation payloads on iOS Safari were timing out, leaking $14.2M in annualized ARR.

PHASE 04 // AUTOMATED RECOVERY +$14.2M RECOVERED

Edge-Cached Remediation Curve

Deploying Redis edge-caching dropped P95 latency from 1,940ms to 180ms, snapping the leaky cohort into an ascending +24.8% conversion trajectory.

PHASE 01: UNCLUSTERED EVENT STREAM

260 Behavioral Cohort Nodes (n = 18.4M sessions)

RECOVERED ARR IMPACT

$0.0M

HOVER PARTICLES TO INSPECT

// 03. ANALYTICS ENGINEERING & DATA QUALITY

Interactive "Dirty-to-Clean" ETL Scrubber

← RAW STREAM (14.8% CORRUPTED) DBT GOLD MART (99.98% VALID) →

DRAG SCRUBBER TO WIPE BETWEEN RAW WEBHOOK STREAM & DBT STAR SCHEMA:

RAW GOLD

✓ prod_mart.fct_orders_validated GREAT EXPECTATIONS: 42/42 PASSED

PK ENFORCED • UTC ISO-8601 • DEDUPLICATED

ORDER_UUID (PK)	CUSTOMER_ID (FK)	EVENT_TIMESTAMP_UTC	NET_AMOUNT_USD	ATTRIBUTION_CHANNEL	SCHEMA_STATUS
ord_8f92a1c04b	cust_90412	2026-03-14T18:22:10Z	$420.00	organic_search	VALIDATED
ord_3d71e8b92a	cust_11840	2026-03-14T18:24:05Z	$1,250.00	enterprise_outbound	IMPUTED_FX
ord_6c19f4a03e	cust_55201	2026-03-14T18:25:49Z	$89.50	paid_social_video	DEDUPED
ord_9a44b2d81f	cust_77319	2026-03-14T18:29:12Z	$640.00	partner_api_v3	VALIDATED

DBT MODEL: int_orders_cleansed.sql → fct_orders_validated.sql NULL RATE: 0.00% // DUPLICATES: 0

⚠ raw_kafka.webhook_checkout_dump ANOMALIES DETECTED: 14.8%

UNSTRUCTURED JSON • MIXED TZ • DUPLICATE KEYS

raw_id	user_ref	client_ts	cart_val	utm_source_raw	ingestion_flag
8f92a1c04b (DUP)	NULL	1710440530 (EPOCH)	-$420.00 (NEG)	Gooogle_Organic??	CORRUPT_SIGN
3d71e8b92a	USR#11840	03/14/26 2:24PM PST	1250,00 EUR?	[object Object]	TZ_MISMATCH
6c19f4a03e (x3)	55201	N/A (TIMEOUT)	$89.50000001	fb_ig_reel_9921	RETRY_DUP
9a44b2d81f	undefined	2026-14-03 (INVALID)	$640	partner//api	MISSING_FK

RAW KAFKA TOPIC: checkout_events_unfiltered NULL RATE: 14.8% // DUPLICATE RETRIES: 6.2%

⇄

// 04. IN-BROWSER SQL WORKBENCH & EXPORT

Multi-Mode SQL & Visual Sandbox

duckdb://marts/saas_ndr.sql

12.4 ms

EXECUTIVE FINDING //

QUERY OUTPUT TELEMETRY

SaaS Net Dollar Retention (%)

// 05. CAUSAL EXPERIMENTATION ENGINE

Bayesian A/B & Monte Carlo Simulator

01. SAMPLE TRAFFIC (SESSIONS) 140,000

02. CONTROL BASELINE CVR (%) 3.40%

03. VARIANT RELATIVE LIFT (%) +12.5%

04. AVERAGE ORDER VALUE ($) $160

STATISTICAL VERDICT

★ SHIP VARIANT B

PROJECTED ANNUAL REV

+$1,142,400

Control Posterior Variant B Posterior

P(B > A): 99.7%

MIN DETECTABLE EFFECT (MDE): 2.1% 95% CREDIBLE INTERVAL: [+7.8%, +17.2%]

// 06. PRODUCTION ARCHITECTURE & IMPACT

Selected Decision Science Case Studies

● AVAILABLE FOR STAFF ANALYST & PRINCIPAL ADVISORY ROLES

Ready to turn raw warehouse tables into compounding margin?

7+ years leading analytics engineering and decision science across Series C–Public SaaS & FinTech leaders in San Francisco. Execute the query or press ⌘K to connect.

snowflake://prod.talent_mart ● READY

SELECT email, github, calendar_link
FROM staff_decision_scientists
WHERE full_name = 'John Doe'
  AND base_city = 'San Francisco, CA';

Turning noisy telemetry into $48M+ decisions.