Case Studies

Work that speaks for itself

Real problems. Real systems. Real results. Every case study represents production engineering.

Parallel Autodialer System

High-concurrency predictive dialer handling 1000+ concurrent calls with sub-second queue latency and async AMD.

1000+
Concurrent Calls
<1s
Queue Latency
99.9%
Uptime
Async
AMD Processing
Golang NestJS TypeScript Redis PostgreSQL +5

Distributed WebSocket Presence

Real-time presence tracking across multiple server replicas with zero ghost sessions and sub-second accuracy.

<1s
Presence Accuracy
0
Ghost Sessions
120s/90s
Idle Detection
Multi
Replicas
Golang Redis WebSocket Heartbeat Protocol Cron

929K Recording Migration

Migrated 929,659 recordings from Twilio to Supabase, cutting storage costs from $450/mo to $2.17/mo.

929K
Recordings Migrated
$450/mo
Before Cost
$2.17/mo
After Cost
$5,374+
Annual Savings
Golang PostgreSQL Supabase Twilio API Node.js

CRM Platform Refactor & 27GB Migration

Full platform redesign with normalized schema and 27GB zero-downtime data migration.

27GB
Data Migrated
Zero
Downtime
Zero
Data Loss
Normalized
Schema
PostgreSQL Schema Design Batch Processing Staged Deployments

Desktop Database Client

Lightweight, fast PostgreSQL administration tool built with Wails for minimal resource usage.

Multi
Connections
Unlimited
Query Consoles
Minimal
Resource Usage
Multiple
Export Formats
Golang Wails PostgreSQL TypeScript

Real-Time Multi-User Chat

From-scratch real-time messaging system using Bun's native WebSocket server — no frameworks, pure fundamentals.

None
Framework
None
ORM
Bun
Runtime
Custom WS
Protocol
Bun TypeScript PostgreSQL React Vite +1

Inbound Call Routing & Channels

Dynamic inbound channel routing system with call transfer capabilities and real-time updates.

Dynamic
Routing
User + Channel
Transfer
Real-time
Updates
No Restart
Config
Golang NestJS Twilio WebSocket PostgreSQL +1

Dialer Architecture Revamp

Decomposed monolithic NestJS dialer into modular Go services with gateway-based routing and zero-downtime deployments.

Gateway
Architecture
3 Independent
Handlers
Zero-Downtime
Deployment
gRPC
Communication
Golang gRPC Redis PostgreSQL Twilio +1
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