ComplexityZero
Engineering Portfolio

Case studies in production software engineering.

Detailed breakdowns of how we architected, built, and optimized high-performance systems for real companies.

Finance4 Months • 2025

Vortex Real-Time Event Ingestion Platform

Processing 50,000+ events per second with sub-second dashboard visualization.

The Problem: The client's existing PostgreSQL-based analytics pipeline was locking tables under high ingestion volumes (15k+ events/sec), causing queries on the client-facing dashboard to timeout and latency to exceed 12 seconds.
The Solution: Engineered an event-driven architecture that separates ingestion from querying. Built a unified Next.js dashboard with virtualized data tables, interactive time-range selectors, and instant CSV/Parquet export capabilities.
50k+
Events Ingested / Sec
< 180ms
P95 Query Latency
99.99%
Platform Uptime
70%
Infrastructure Cost Savings
Next.jsTypeScriptClickHouseGoKafkaTailwind CSS
Full Case Study
SaaS3.5 Months • 2025

Strata Multi-Tenant Billing & Usage Engine

Scalable subscription and metered usage entitlement engine for high-growth SaaS.

The Problem: The client was experiencing revenue leakage and billing reconciliation errors due to fragmented webhook listeners and hardcoded plan logic across multiple repositories.
The Solution: Architected a centralized billing microservice with a single source of truth for entitlements, automated proration handling, and seamless self-serve plan upgrades.
0
Billing Reconciliation Errors
< 2ms
Entitlement Check Latency
100%
Automated Stripe Invoicing
35%
Increase in Self-Serve Upgrades
Next.jsNode.jsPostgreSQLPrismaStripe APIRedis
Full Case Study
Healthcare3 Months • 2025

SynthDoc Intelligent Clinical Document Pipeline

HIPAA-compliant document parsing, vector indexing, and structured data extraction.

The Problem: Healthcare practitioners spent over 20 hours per week manually extracting patient history, medications, and diagnoses from scanned PDFs with high clerical error rates.
The Solution: Built a compliant end-to-end ingestion pipeline and reviewer interface enabling clinicians to verify extracted patient attributes in seconds with complete source transparency.
85%
Reduction in Manual Data Entry
14s
Average Document Processing Time
99.4%
Extraction Schema Accuracy
100%
HIPAA Security Compliance
PythonFastAPINext.jspgvectorOpenAI APIAWS S3
Full Case Study
Startups5 Months • 2024

Relay Distributed Fleet Dispatch & Telematics

Dynamic routing, live GPS tracking, and automated driver dispatch for nationwide logistics.

The Problem: Dispatchers relied on manual phone calls and uncoordinated spreadsheets to assign loads, resulting in empty return miles and lost tracking during cell network outages.
The Solution: Constructed a synchronized mobile and web ecosystem providing instant visibility into load statuses, turn-by-turn routing, and electronic proof-of-delivery (ePOD).
28%
Reduction in Route Miles
100%
Real-Time Telemetry Coverage
4.8/5
Driver Mobile App Rating
42%
Faster Dispatch Turnaround
React NativeNext.jsNode.jsPostgreSQLWebSocketsDocker
Full Case Study
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