Arun Kiran PatroPrincipal Engineer • UI Architect
Career Track Record

Engineering Experience & Impact

15+ years of hands-on technical ownership across high-frequency trading brokers, global FinTech compliance, and cloud-scale platforms.

Current Position • Jan 2026 – PresentUS-based Trading Broker

Aries (Aries.com)

UI Architect • Full Frontend Ownership

Visit Aries.com ↗

As UI Architect, I have end-to-end ownership of the complete Aries frontend web stack. I lead the architectural evolution of our high-performance trading workspace, two-thread Web Worker architecture, design systems, AI/voice trading agents, compliance onboarding, and high-rigor quality standards.

• Infinite Canvas & Real-Time Cross-Browser Synchronization

  • ✓Engineered the flagship Infinite Canvas trading environment: 60fps freeform 2D pan and zoom viewport, responsive widget rail, prebuilt workspace templates, and dynamic widget visibility management enabling traders to build custom multi-monitor desk setups.
  • ✓Architected real-time cross-browser and multi-tab content synchronization: leveraged deterministic state replication and cross-context message channels (BroadcastChannel and WebSockets) so active symbol selection, chart timeframes, canvas coordinates, and widget linking stay instantly synchronized across multiple browser windows, tabs, and displays without race conditions.
  • ✓Engineered bi-directional widget linking (synchronizing symbol context across charts, order book, depth ladder, and options chain) combined with a two-thread Web Worker architecture offloading market data feeds to maintain steady 60fps canvas interaction under heavy tick volume.
  • ✓Delivered major trading workflows on the canvas: complete order rewrite, order API modernization, fractional market orders, dollar/share equity orders, short/cover stock orders, SPX/SPXW weekly option contracts, and Active Trader enhancements.

• AI-Assisted Development & Engineering Velocity

  • ✓Pioneered AI-assisted engineering workflows across the frontend stack: leveraged LLM coding agents, semantic refactoring pipelines, and automated codemods to accelerate feature delivery and technical debt elimination.
  • ✓Modernized 314 legacy files to 100% strict TypeScript compliance in record time using AI-assisted type inference and strict interface generation with zero runtime regressions.
  • ✓Accelerated test suite expansion via AI pair-programming and synthetic mock generators, driving unit test coverage from low legacy baselines to 80% and 90%+ across core business libraries.
  • ✓Standardized AI developer tooling and prompt guardrails, including MCP (Model Context Protocol) key generation workflows to power agentic trading analysis and internal operational tooling.

• Native AI Trading Chat & Multimodal Voice Systems

  • ✓Built out native AI chatbox integration with streaming token delivery, tool-call visualization, and interactive embedded tables/charts inside conversational threads.
  • ✓Integrated full voicebot experience with animated voice orb UI, real-time interim transcript streaming, guest AI access control, and citation hover cards.
  • ✓Designed terms consent, prompt guardrails, and compliance telemetry for conversational trading workflows.

• Design System & Frontend Modernization

  • ✓Led full stack frontend modernization: shadcn UI migration, shared design component adoption, typography/font standardization, design tokens, and modular package extraction.
  • ✓Created and hardened 'aries-web-library': package setup, automated release pipeline, tokens/fonts, icons/utils, AG Grid wrapper, date pickers, creatable selects, phone input, CSS variables palette, and externalized dependencies.
  • ✓Built data-heavy market surfaces: prediction market widgets, interactive finance widgets, screener heat maps, earnings & economic calendar widgets, and dynamic account info visibility.

• FinTech Onboarding & Client Center Operations

  • ✓Advanced user onboarding: redesigned registration funnel, common & joint-account layouts, instant bank setup via Plaid Layer, mid-desk registration, entity accounts, personal trust, and member/trustee workflows.
  • ✓Delivered Client Center operations: full redesign, activity tab with high-throughput AG Grid table, CSV/PDF statement exports, ACH & wire transfers, bank selection/nicknames, MCP key generator, and My Account business page.

• Engineering Rigor & Quality Systems

  • ✓Raised automated unit test coverage from low thresholds to 80%, then to 90%+ across core business packages.
  • ✓Implemented automated E2E CI pipelines, eliminated unit-test warnings, standardized deployment & hotfix workflows, and patched all critical/high dependency alerts.
60 FPSInfinite Canvas Pan & Zoom
Multi-TabCross-Browser Content Sync
AI-Assisted314 Files Modernized to Strict TS
90%+Target Unit Test Coverage
Enterprise Foundations

Prior Engineering Leadership

Oracle Cloud

Principal Systems Engineer & UI Architect

Cloud Infrastructure

Led UI architecture for enterprise Access Governance and co-invented US Patent US12339836B2 for automated GraphQL schema and resolver generation.

  • ✓Co-invented US Patent US12339836B2 (Oracle International Corp): Designed and built the interactive UI to select database schema objects, REST objects, or interfaces to automatically generate GraphQL schemas and resolver functions across diverse backend datasources.
  • ✓Led UI platform architecture for cloud-native enterprise Access Governance, unifying disconnected cloud identities, audit logs, and IAM resources.
  • ✓Stepped into critical backend reliability operations to raise automated test coverage from 30% to 82%, restoring release velocity and system stability.
View Patent US12339836B2 →

PayPal

Software Developer

Enterprise FinTech

Developed high-scale transaction systems, cross-platform compliance flows, and customer support CRM tooling across payments operations.

  • ✓Spearheaded cross-platform compliance flow architecture spanning iOS, Android, and Web that unlocked transactions >$3,000 without disrupting checkout, recovering ~$800,000 per week in transaction volume (+140% growth in high-value payments).
  • ✓Engineered customer support CRM workflows across 200,000+ daily support calls, reducing average handling time by 30 seconds per call and saving millions annually.
  • ✓Used fine-grained feature flags and observability pipelines for zero-incident global rollouts.
View PayPal Case Study →

Interested in senior engineering leadership?

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

Get in Touch →