Arun Kiran PatroPrincipal Engineer • UI Architect
Production Impact

Engineering Case Studies

Real production systems delivered under strict enterprise constraints, high transaction volumes, and regulatory sensitivity.

Aries (Aries.com) • US-Based Trading Broker (Jan 2026 – Present)

Infinite Canvas & Real-Time Cross-Browser Workspace Synchronization

The Problem

Active retail and institutional traders operate across multiple browser windows, tabs, and external displays. They experienced state desynchronization, layout drift, and UI thread lag when attempting to pan, zoom, and link widgets across complex multi-window trading setups during high-volatility market open spikes.

Why It Was Hard

Synchronizing freeform infinite canvas coordinates, multi-widget linking (color-coded symbol groups connecting charts, order books, and depth ladders), and real-time market data across multiple disconnected browser tabs and windows without race conditions, memory leaks, or dropped websocket ticks.

What I Architected & Built

Engineered an infinite canvas architecture with hardware-accelerated 2D viewport transformations, widget docking rails, and template serialization. Implemented a deterministic cross-browser synchronization layer using BroadcastChannel and bidirectional websocket events to replicate active symbol context, canvas viewport states, and linked widget parameters in real time across browser tabs and displays. Offloaded tick calculations to Web Workers to ensure rock-solid 60fps responsiveness. Accelerated delivery and refactoring using AI-assisted engineering pipelines, modernizing 314 files to strict TypeScript and reaching 90% unit test coverage.

Measurable Impact

  • ✓Instantaneous sub-10ms cross-browser state synchronization across multi-tab and multi-monitor trader setups.
  • ✓Silky 60fps infinite canvas panning, zooming, and freeform widget organization under peak market volume.
  • ✓Bi-directional widget linking enabling color-coded symbol synchronization across order books, option chains, and charts.
  • ✓Pioneered AI-assisted development velocity: modernized 314 files to strict TypeScript architecture and drove test coverage to 90%+.
  • ✓Delivered major trading workflows: complete order rewrite, fractional orders, short/cover, and SPX/SPXW weeklies.
Trader Canvas Action (Pan, Zoom & Symbol Select)
Cross-Browser Sync Engine (BroadcastChannel & WS)
Dedicated Web Worker (Market Ticks & Layout Compute)
Multi-Window 60fps Infinite Canvas
Deterministic cross-browser state replication coupled with Web Worker offloading guarantees zero-latency layout and symbol synchronization across trading monitors.
Oracle Cloud • Enterprise Systems & Patent US12339836B2

Automated GraphQL API Schema & Resolver Generation Platform

The Problem

Developing GraphQL APIs to expose enterprise backend datasources traditionally required writing hundreds of lines of Schema Definition Language (SDL) and manually crafting complex resolver functions to fetch data from diverse databases and REST APIs.

Why It Was Hard

Enabling granular introspection across heterogeneous backend systems (relational databases with tables/columns, and REST APIs with OpenAPI specs) and automatically generating type-safe GraphQL schemas, query/mutation operations, and resolver execution metadata with visual editing controls.

What I Architected & Built

Co-invented and built a patented schema design platform (US Patent US12339836B2, Oracle International Corp). I designed and built the interactive User Interface that introspects backend datasources (relational databases, REST APIs, microservices) and enables developers to visually select database schema objects, columns, REST objects, or interfaces to automatically generate complete GraphQL schemas and resolver functions without manual SDL or resolver coding.

Measurable Impact

  • ✓Eliminated manual Schema Definition Language (SDL) authoring and resolver boilerplate for enterprise backend services.
  • ✓Accelerated GraphQL API creation across relational databases, OpenAPI REST endpoints, and microservices.
  • ✓Provided an interactive visual GUI for developers to inspect, select, and customize resolver functions before deployment.
  • ✓Granted US Patent US12339836B2 by the USPTO.
Relational Databases (Tables & Columns)
REST APIs (OpenAPI Specifications)
Microservices & Web Services
Visual Selection UI (DB Schema Objects & REST Interfaces)
Generated GraphQL Schema & Resolvers
Patented system that introspects heterogeneous backend datasources to visually generate GraphQL API schemas and resolver functions without manual SDL coding.
PayPal • High-Scale FinTech

Unlocking High-Value Payments Through Compliance Architecture

The Problem

Payments above $3,000 were halted across PayPal checkout due to mandatory compliance requirements, resulting in substantial loss of high-ticket customer volume across web, Android, and iOS channels.

Why It Was Hard

Strict zero-friction mandate for good users, zero tolerance for compliance failures, and required coordination across Web, iOS, Android, and multiple legacy risk services.

What I Architected & Built

Architected a cross-platform compliance flow that dynamically intercepted high-value transactions, evaluated regulatory state on the fly, and guided users through non-blocking verification without aborting checkout.

Measurable Impact

  • ✓Recovered ~$800,000 per week in high-ticket transaction volume.
  • ✓+140% surge in successful high-value transactions within 60 days.
  • ✓Zero drop in checkout conversion rate for compliant users.
  • ✓Shipped concurrently across iOS, Android, and Web platforms.
High-Value Transaction Initiation (>$3K)
Dynamic Regulatory Check
Seamless In-Flow Verification
Immediate Payment Settlement
Cross-platform compliance architecture that verified regulatory requirements dynamically without checkout friction.
Enterprise CRM • Global Operations

Consolidated Operations Flow for 200,000+ Daily Inquiries

The Problem

Customer support representatives navigated across 4+ disconnected internal tools to handle customer inquiries, resulting in cognitive overload and lengthy call handling times.

Why It Was Hard

High operational volume (200,000+ daily calls), distributed global support staff, and zero tolerance for CRM downtime or data inconsistencies.

What I Architected & Built

Consolidated fragmented legacy screens into an intelligent, guided workflow interface with real-time contextual sidebars, unified customer timelines, and automated action triggers.

Measurable Impact

  • ✓Saved 30 seconds on average per call across 200K+ daily customer inquiries.
  • ✓Saved millions of dollars annually in operational staffing and support overhead.
  • ✓Accelerated new agent onboarding and ramp-up by several weeks.
  • ✓Established an extensible architectural framework adopted across multiple customer support divisions.
Before
Legacy Screen A (Customer Profile) → Legacy Screen B (Billing & Charges) → Legacy Screen C (Fraud Flags)
↓
After
Unified CRM Guided Workspace (Context-Aware Single Screen)
Consolidated fragmented screens into a single intelligent workspace, saving 30s per customer interaction.

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