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Senior software engineer with ~8 years across top crypto exchanges and digital banking, building production-grade mobile (Flutter/React Native) and web (Next.js/React) systems with strong reliability and performance focus. Experienced in performance optimization, CI/CD, and AI-augmented cross-stack development using tools like Cursor, ChatGPT Codex, and Claude Code. Leads mobile and real-time product surfaces in high-traffic fintech/crypto environments, delivering exchange-grade trading modules, wallet integrations, localization without app releases, and AI automation platforms using RAG (pgvector) plus workflow orchestration (n8n). Comfortable reading, debugging, and modifying native iOS/Android and web codebases with strong client-side architecture fundamentals.…Senior software engineer with ~8 years across top crypto exchanges and digital banking, building production-grade mobile (Flutter/React Native) and web (Next.js/React) systems with strong reliability and performance focus. Experienced in performance optimization, CI/CD, and AI-augmented cross-stack development using tools like Cursor, ChatGPT Codex, and Claude Code. Leads mobile and real-time product surfaces in high-traffic fintech/crypto environments, delivering exchange-grade trading modules, wallet integrations, localization without app releases, and AI automation platforms using RAG (pgvector) plus workflow orchestration (n8n). Comfortable reading, debugging, and modifying native iOS/Android and web codebases with strong client-side architecture fundamentals.

Ekko Lim

Software Engineer, Full Stack Developer, Web Developer, +2

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Senior software engineer with ~8 years across top crypto exchanges and digital banking, building production-grade mobile (Flutter/React Native) and web (Next.js/React) systems with strong reliability and performance focus. Experienced in performance optimization, CI/CD, and AI-augmented cross-stack development using tools like Cursor, ChatGPT Codex, and Claude Code. Leads mobile and real-time product surfaces in high-traffic fintech/crypto environments, delivering exchange-grade trading modules, wallet integrations, localization without app releases, and AI automation platforms using RAG (pgvector) plus workflow orchestration (n8n). Comfortable reading, debugging, and modifying native iOS/Android and web codebases with strong client-side architecture fundamentals.…Senior software engineer with ~8 years across top crypto exchanges and digital banking, building production-grade mobile (Flutter/React Native) and web (Next.js/React) systems with strong reliability and performance focus. Experienced in performance optimization, CI/CD, and AI-augmented cross-stack development using tools like Cursor, ChatGPT Codex, and Claude Code. Leads mobile and real-time product surfaces in high-traffic fintech/crypto environments, delivering exchange-grade trading modules, wallet integrations, localization without app releases, and AI automation platforms using RAG (pgvector) plus workflow orchestration (n8n). Comfortable reading, debugging, and modifying native iOS/Android and web codebases with strong client-side architecture fundamentals.

Available to hire

Senior software engineer with ~8 years across top crypto exchanges and digital banking, building production-grade mobile (Flutter/React Native) and web (Next.js/React) systems with strong reliability and performance focus. Experienced in performance optimization, CI/CD, and AI-augmented cross-stack development using tools like Cursor, ChatGPT Codex, and Claude Code.

Leads mobile and real-time product surfaces in high-traffic fintech/crypto environments, delivering exchange-grade trading modules, wallet integrations, localization without app releases, and AI automation platforms using RAG (pgvector) plus workflow orchestration (n8n). Comfortable reading, debugging, and modifying native iOS/Android and web codebases with strong client-side architecture fundamentals.

Skills

Experience Level

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Intermediate

Language

English

Advanced

Chinese

Advanced

Malay

Advanced

Work Experience

Freelance — AI Automation / Full-Stack Engineer

January 1, 2025 - Present

Independent full-stack and AI automation delivery across SME and crypto/fintech clients end-to-end from scoping to deployment. Integrated Tencent IM SDK in Flutter for 1:1 and group chat, voice calling, and live streaming for a crypto exchange (NDA), as one of the project developers (~3 months). Built an AI chatbot automation platform using RAG over Supabase pgvector with n8n orchestration, with confidence-gated LLM replies and human handoff via WhatsApp Cloud API and Chatwoot. Implemented multi-model routing across ChatGPT, DeepSeek, GLM, and MiniMax APIs based on use case (Q&A/FAQ/order checking/slot & availability lookup) with multi-language support (Chinese Mandarin and English). Daily AI-augmented cross-stack development across web and mobile using Cursor, ChatGPT Codex, and Claude Code.

Senior App Engineer at Fasset

August 1, 2024 - May 1, 2025

Shipped features end-to-end across React (web) and React Native (mobile). Reduced asset listing load time from 3s to 200ms (93% improvement) and built a bulk-actions system reducing ~200 minutes of manual operations to ~1 minute (~200×) for a ~50-person team. Built internal admin tooling for 300k+ user records including advanced search, high-performance pagination, before/after diff audit trail, and live preview for content modules.

App Lead Developer at Yubit

December 1, 2022 - July 1, 2024

Led the mobile team and drove a structured refactor, building a real-time performance/user behavior/network status tracking system from mobile SDK integration through Elasticsearch with Kibana dashboards for support troubleshooting. Owned and maintained core trading surfaces including perpetual futures, spot, K-line, and order book modules. Built split/merge rendering position mode for perpetual futures (smooth rendering of 300 open positions on mid-range devices) and delivered wallet integrations (MetaMask, WalletConnect, UniPass), deposit/withdrawal, Telegram bots, and Earn flows from scratch. Built an outreach notification system integrating Tencent Push with Spring Boot 3.0, delivering market trend updates, community news, and platform-wide alerts. Implemented a locale management system enabling language updates without a new app release; shipped updates to App Store and Play Store.

Senior Frontend Developer at Bybit

May 1, 2020 - December 1, 2022

Delivered VIP program, fee rate, leaderboard, trader profile, copy trading, affiliate/referral, and rewards hub from scratch on time. Improved performance and SEO (Lighthouse 70→92; SEO 60→92). Co-led migration of the affiliate commission computing engine from PHP 7 to Spring Boot 2.4 (Java 8), re-architecting a system processing billions of daily transactions with a verified 20× performance improvement. Built E2E testing into CI/CD achieving ~80% regression-time reduction and rolled out Sentry monitoring across all frontend projects.

Senior Software Engineer at Kumoten

June 1, 2018 - May 1, 2020

Led mobile apps from zero to store launch in 5 months, improving new users by +30% and stickiness by +20%. Implemented CI/CD reducing deploy time from 3 hours to 20 minutes (90%); migrated 2TB assets to cloud improving latency by ~30% and load time by ~50%.

Software Developer at Dignersys

July 1, 2017 - March 1, 2018

Built ERP (Finance & Sales) and warehouse modules and delivered a hybrid iOS solution. Implemented an EDI system in 3 months and improved iOS sales-app load time by 20%.