React Native Developer

Engineered a custom Expo Config Plugin / native module to integrate a third-party receipt recognition SDK, unlocking on-device OCR inside the Expo Managed Workflow and removing the need to eject - cutting integration effort from weeks to under 3 days per native dependency. Architected and shipped a cross-platform mobile app (iOS + Android) and a real-time React web dashboard used by 40+ retail partners for live inventory monitoring and consumer-behavior analytics, sharing ~60% of business logic between web and mobile. Built receipt scanning and barcode lookup pipelines returning product data (nutrition, ingredients) with sub-800 ms p95 latency, becoming the most-used feature with 70%+ weekly active users. Owned full-stack delivery: built Node.js / Express backend services (REST APIs, auth middleware, webhook handlers, third-party data integrations) and Cloudflare Workers for edge logic, removing the need for a separate backend hire. Designed Postgres schemas with Row Level Security in Supabase and Firestore data models in Firebase; chose the right store per workload and migrated 3 hot collections from Firestore to Postgres, cutting read costs ~35%. Operated the full cloud and BaaS stack end to end: Firebase (Auth, Firestore, Cloud Functions, Push Notifications), Supabase (Postgres + RLS, Storage), Cloudflare (Workers, KV, R2, CDN), and Clerk (auth, sessions, organization roles). Introduced AI coding agents (Claude Code) into the daily workflow for feature scaffolding, large-scale refactoring, automated test generation, and first-pass PR review - reducing average PR cycle time by ~40% and review iterations from 3 to 1. Designed a scalable mobile architecture (typed API layer with generated types, modular feature folders, Reanimated-driven UI) that held a steady 60 FPS on mid-range Android devices. Mentored 2 junior developers to independent feature ownership and ran weekly brainstorming sessions to align engineering with product and business goals. Authored ADRs and technical documentation, halving onboarding time for new contributors.

Built core blockchain interaction layer over JSON-RPC nodes, delivering real-time balance updates and unified transaction history across 8+ EVM networks (Ethereum, Polygon, Arbitrum, Optimism, BSC, Base, and others). Engineered a precise Gas Fee estimation engine for L1 and L2 (EIP-1559 + legacy), reducing failed-transaction rate by ~25% and saving users meaningful fees on every transfer. Designed an automated routing algorithm for cross-chain bridges and DEX swaps, integrating 4 liquidity aggregators to consistently minimize slippage and surface the best route per trade. Implemented secure asset transfers via standard wallet addresses and internal user aliases (nicknames), removing a top friction point in user testing. Shipped an end-to-end encrypted P2P chat tied to user wallets, enabling decentralized counterparty communication directly inside the app. Led cross-functional communication with backend, design, and security teams to unblock integrations and keep a 2-week release cadence.

Built and maintained a regulated Web Banking Platform (React) alongside the React Native mobile app, keeping feature parity and a consistent UX across all digital touchpoints for SMB customers. Engineered complex asynchronous flows with Redux Saga for real-time financial transactions and global state management on both web and mobile. Created a shared UI component library of 50+ components used by both Web and Mobile codebases, accelerating feature delivery by ~30%. Implemented and enforced financial-grade security and compliance requirements (KYC/AML, secure storage, session handling). Drove code-review culture and led architectural refactors that reduced critical-screen load times by ~35% and trimmed average API response latency. Translated complex Figma designs into responsive, high-fidelity interfaces tuned for business-user workflows. Documented core business logic and API integration flows, lowering the ramp-up cost for new engineers joining the team.