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About me

I'm Tony Law, a senior full-stack engineer focused on fintech, cross-border payments, payment gateways, and AI-assisted financial tooling. I have built production systems across web, mobile, backend APIs, financial product workflows, monitoring, and internal platforms.

My recent work sits at the intersection of software engineering and markets: options research tools, AI-assisted U.S. equity analysis, publishing automation, and product infrastructure for financial workflows. I care about systems that are useful in the real world: clear ownership, observable behavior, reliable delivery, and interfaces that make complex financial decisions easier to reason about.

Before building independently, I worked on cross-border financial products, payment infrastructure, and R&D management systems. That experience shaped how I think about product engineering: software should survive compliance, operations, regional rollout, and actual user pressure, not just look clean in a demo.

Experience​

Independent Projects​

Full-stack engineering practice around fintech products and AI-assisted finance workflows.

  • Modules: THETA options risk tooling, AI US Stock Analyst, publishing automation, Hono/Prisma product stack, Python market-workflow scripts.
  • Responsibilities: designed financial product flows, built type-safe frontend/backend contracts, maintained automation pipelines, and reviewed cross-border payments, KYC/AML, settlement, and serverless architecture.

XTransfer​

Lead Software Developer for cross-border financial products.

  • Modules: cross-border FX, funds, credit, account workflows, Mainland China and Hong Kong site integration, shared business components, i18n scaffolding, Sentry dashboards, and business anomaly reporting.
  • Responsibilities: led Web and React Native architecture for compliance-sensitive financial flows; broke down requirements, wrote technical designs, coordinated delivery with backend/product/operations, reviewed code, integrated APIs, improved LCP/accessibility/monitoring, and mentored engineers through architecture discussions and AI-assisted coding practices.

Lalamove​

Senior Software Developer for payment gateway and payment management systems.

  • Modules: payment gateway, payment-channel integration, multi-region and multi-currency payment services, payment management platform, monitoring SDK, H5/NPM/SDK distribution, and universal cashier for PC, mobile, and mini-program scenarios.
  • Responsibilities: extended Java/Spring Boot backend services; refactored the legacy payment management frontend from Vue to React; established repository, build, release, and deployment foundations; improved payment observability and compliance-oriented operations; and reduced integration cost through reusable cashier and SDK patterns.

ONES​

Software Developer for R&D management systems.

  • Modules: KA customer customizations, backend APIs, data models, business modules, and internal management tools.
  • Responsibilities: delivered Go backend features and front-end pages across product, design, and operations workflows; balanced performance, maintainability, and delivery schedules; and reduced manual operational work through workflow tooling.
  • THETA — options research and risk tooling with broker integration, real-time greeks, event-risk views, and AI-assisted report summaries.
  • react-ios-multiselect — an open-source React component for iOS-style multi-select interactions: tonylawx/react-ios-multiselect.
  • AI US Stock Analyst — a market-calendar-aware workflow that generates U.S. equity briefs, renders publishable HTML, and supports WeChat draft publishing. Open-sourced as an AI-agent (Codex) skill: tonylawx/us-stock-analyst-skill.
  • Blog — this bilingual Docusaurus site for software, markets, and notes from building in public.

See Projects for the full list.

Skills​

Programming skills:

CodexClaudeCursorDeepSeekTypeScriptBunReactNext.jsTailwind CSSHonoGoPrismaPostgreSQLRedisDocker

  • Language skills: Cantonese, Mandarin, English

What I Build Well​

  • Financial product systems — cross-border payments, FX, account workflows, credit/funds products, payment gateway operations, and compliance-sensitive UI.
  • Full-stack product delivery — frontend architecture, backend APIs, reusable business components, type-safe contracts, CI/CD, and production operations.
  • Monitoring and reliability — Sentry dashboards, anomaly reporting, operational checks, and clear feedback loops for business-critical flows.
  • AI-assisted workflows — LLM-backed research, report generation, automation scripts, prompt playbooks, and human-reviewable publishing pipelines.

Education​

B.Eng. — Software Engineering

Contact​

Recruiters welcome — the best way to reach me is by email.