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Jimi Lee

Jimi Lee

Engineer by design.
Hypnotherapist by calling.
Theatre maker by passion.
Christian by grace.

Fintech CTO Agentic Engineer Hypnotherapist NLP Practitioner Psychological Analyst Theatre Director & Actor
20+
YEARS BUILDING

From trading floors in Hong Kong to payment infrastructure across three continents. Alongside a parallel journey into the beauty of human mind and arts.

WHALE CASTLE IT CONSULTANT
WHALE CASTLE STUDIO
01 / The Engineer

The Tech Side

Two decades of building enterprise financial systems, leading AI-first engineering, and managing IT at scale.

20+
Years Fintech
100+
Financial Firms Served
$100M
Deal Supported
100%
Uptime · 7 Yrs

AI & Agentic Engineering

Multi-agent collaborative pipelines with autonomous code generation, review, and verification. Building enterprise platforms with AI-first spec-driven development

Agentic CodingMulti-Agent PipelinesSpec-Driven DevRAGLLM Orchestration

Enterprise IT Management & Governance

Multi-million-dollar IT budget management, vendor ecosystems, cybersecurity frameworks, and regulatory-aligned IT governance for HKEX-listed corporations

IT GovernanceDR/BCPAuditVendor Mgmt

Trading & Settlement Systems

End-to-end delivery of trading, settlement, and asset management platforms for securities, futures, and fund management

SecuritiesFuturesAsset MgmtBack-Office
Continued

Cross-Border Payment Infrastructure

Payment platforms with institutional custody, fiat settlement, and e-commerce integration for cross-border transactions

PaymentsSettlementCustodyFireblocksSafeheron

Cloud & Infrastructure Architecture

AWS, Oracle Cloud, Docker, CI/CD pipelines. System architecture, disaster recovery, and business continuity planning

AWSOracle CloudDockerCI/CD

Regulatory Compliance & Risk

SFC Registered Manager-in-Charge (IT). Engaged with HKEX, SFC, HKMA on fintech regulation. 100% audit pass rate across 7 years

HKSFCHKMAHKEXRisk Control

Website Design, Development & Hosting

End-to-end web solutions, from responsive design and custom development to managed hosting, domain administration, and ongoing site maintenance

Web DesignCustom DevelopmentManaged HostingDomain AdminSite Maintenance
Tech Stack
Agentic EngineeringTypeScriptReact / Next.jsNode.js / NestJSPythonPHP LaravelWordPressPostgreSQLMySQLMongoDBREST / WebSocketSystem IntegrationAWSOracle CloudDockerGitHub
02 / The Healer & Artist

The Other Side

Healing minds and telling stories, the part that makes everything else richer.

Certified Hypnotherapist & Instructor

Practising and teaching clinical hypnotherapy, drawing psychological analysis, and drama therapy, both one-on-one sessions and instructor-led training programmes

PBH — CanadaHCAA — AsiaHypnotherapy InstructorNLP PractitionerDrawing Psychological AnalysisDrama Therapist

Theatre Director, Actor & Playwright

Writing, directing, and performing on stage, where timing, empathy, and vulnerability all collide under the spotlight

Things I Love
Faith
People
Arts
Books
Dogs
Technology
Astronomy

"The best technology leaders understand people, stories, and the invisible systems that shape how we think and feel."

03 / The Journey

The Road

Two decades of shipping systems that move money, manage risk, and power financial institutions.

2020 → NOW

Founder — Whale Castle IT Consultant

Enterprise IT · Cloud · AI-Driven Development

Delivering cloud transformation, custom platforms, and CTO-level leadership for HKEX-listed corporations, multinational trading groups, major education institutions, and government-funded NGOs.

2021 → NOW

CTO — ApexPay Technologies (Formerly DEFINIS)

Cross-Border Payments · Institutional Settlement

Architected and shipped a cross-border payment platform end-to-end, from custody integration to fiat settlement. Now pioneering AI-first agentic engineering to deliver at enterprise scale as a solo CTO.

2018 → 2025

IT Director — China Vered Financial

HKEX-Listed · SFC Registered Manager-in-Charge

Spearheaded the eToro strategic partnership supporting a USD 100M investment. Achieved 7 consecutive years of 100% system uptime and a flawless audit record. Directly engaged HKEX, SFC, and HKMA on digital asset regulation.

2014 → 2018

Head of IT — Five Financial Institutions

Huarong Rongde · Haitong Futures · CSC Securities · Excellent Wealth · Orient Finance

Led the IT department across five regulated firms. Drove asset tokenization initiatives, built B2B trading platforms, and managed data centre operations for high-frequency trading environments.

2002 → 2014

Senior System Analyst — POP Electronic

Securities Infrastructure · Fund Management Systems

Built securities/futures trading and settlement systems adopted by 100+ financial institutions. Developed fund management systems for Chong Hing Bank. 12 years of hands-on engineering that became the foundation for everything after.

1997 → 2000

BSc Computer Science — University of Hong Kong

04 / How I Can Help

Work With Me

Two sides of expertise. One person who understands the systems, in both technical and human ways.

FOR YOUR TECH NEEDS
01

Fractional CTO & IT Leadership

Architecture, governance, team strategy, and regulatory-aligned technology leadership for fintech companies and financial institutions.

02

Payment & Financial Platform Development

Cross-border payment systems, trading platforms, settlement infrastructure, and institutional custody integration. Hands-on, end to end.

03

AI-First Engineering & Automation

Multi-agent agentic workflows, spec-driven development, and AI-powered DevOps. Enterprise-grade output from lean teams.

04

Website Design, Development & Hosting

Responsive websites built from scratch or on WordPress, including custom design, development, managed hosting, domain setup, and ongoing maintenance.

FOR YOUR WELLBEING
05

Hypnotherapy & Creative Therapy

Whether you're navigating anxiety, breaking through personal blocks, or seeking deeper self-understanding, I offer clinical hypnotherapy, drawing psychological analysis, and drama therapy in a safe, supportive space.

06

Hypnotherapy Training & Certification

As a certified hypnotherapist instructor, I train individuals and groups to become certified hypnotherapists. I also teach drawing psychological analysis as a therapeutic and diagnostic tool.

Let's Talk

Say Hello

Conversation is the beginning of understanding.

✝ Built with care, curiosity, and a little bit of faith.
© 2026 Jimi Lee