Arun Kiran PatroPrincipal Engineer • UI Architect
Biography & Background

About Arun Kiran Patro

Principal Engineer & Systems Architect • UI Architect at Aries.com with 15+ years of enterprise platform delivery, high-frequency trading architecture, and technical execution.

Currently, I am the UI Architect at Aries (Aries.com), a US-based trading broker, where I own the entire frontend engineering stack. I lead the development of our infinite canvas trading workspace, high-throughput two-thread Web Worker architecture, design systems, AI and multimodal voice trading experiences, and institutional onboarding.

Prior to Aries, I worked at Oracle Cloud as a Principal Systems Engineer & UI Architect, and previously at PayPal as a Software Developer. At PayPal, I designed the cross-platform compliance architecture that unlocked high-value payments ($3,000+) recovering $800K/week in transaction volume, and streamlined global CRM operations saving millions annually. At Oracle Cloud, I led UI architecture for Access Governance, raised automated test coverage from 30% to 82%, and co-invented US Patent US12339836B2 (Oracle International Corp) for datasource introspection UI for GraphQL schema and resolver generation.

My approach is grounded in deep technical ownership: I dive into high-stakes complexity, eliminate architectural debt, build resilient systems, and mentor engineering teams to operate with high craft and velocity.

View Detailed Experience →LinkedIn Profile ↗
Verified MetricsProven Track Record
Aries.comUI Architect since Jan 2026, owning the complete frontend web stack & trading architecture.
1 US PatentCo-inventor on US Patent US12339836B2 (Oracle) for datasource introspection UI for GraphQL schema and resolver generation.
PayPal + Oracle15+ years delivering high-scale payments compliance, cloud IAM, and trading systems.
$800K / wkRecovered transaction volume enabled by cross-platform compliance flow architecture at PayPal.
Career History

Where I've Delivered Impact

Aries (Aries.com) • Jan 2026 – Present

UI Architect

Own the entire frontend estate for a US-based trading broker. Engineered high-performance infinite canvas trading workspaces with real-time cross-browser content synchronization, spearheaded AI-assisted development across 314 modernized TypeScript files and 90%+ test coverage, built native streaming AI/voice trading bots, extracted 'aries-web-library', and shipped institutional fintech onboarding with Plaid Layer.

Oracle Cloud

Principal Systems Engineer & UI Architect

Led UI architecture for a cloud-native enterprise Access Governance platform serving global corporate customers. Raised backend test coverage from 30% to 82%, restoring release velocity and system stability. Co-invented US Patent US12339836B2 (Oracle International Corp): Built the interactive UI to select database schema objects, REST objects, or interfaces to automatically generate GraphQL schemas and resolvers from backend datasources.

PayPal

Software Developer

Engineered high-scale transaction systems and compliance flows. Spearheaded the cross-platform compliance architecture (Web, Android, iOS) that unlocked transactions above $3,000 without disrupting checkout, recovering ~$800,000 per week. Redesigned customer support CRM workflows across 200K+ daily calls to save 30 seconds per call.

Engineering Philosophy

How I Approach Architecture & Delivery

1. Engineering Rigor & Clean Typing

Technical debt compounds silently. Establishing 90% unit test coverage targets at Aries proves that speed and bulletproof quality must go hand-in-hand.

2. Performance-First Architecture

In real-time trading and financial systems, main-thread congestion is fatal. Offloading websocket ticks to Web Workers and creating two-thread architectures keeps the UI interactive at 60fps.

3. Clarity over Rewrites

Most systems do not need multi-year ground-up rewrites. They need clear domain boundaries, decoupled bottlenecks, and structured migration paths that keep the business shipping.

4. Full-Spectrum Ownership

From component design tokens to Web Worker threads, database streaming replicas, and E2E CI pipelines, I own solutions end-to-end.

Interested in discussing engineering leadership?

Reach out directly for Staff/Principal Engineer, Head of Engineering, or Architecture opportunities.

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