Portfolio/Experience Ledger/Jimmie Wang

Chronicle Grid

Jimmie's Ledger

A quiet record of systems, scale, and long-range technical work. Precise on time. Light on noise.

2006

Global Technology Support

IBM

Technical support delivery for Japan and Australia projects

Japan. Australia. Support work with a passport mindset.

Nikon, Komatsu, SMBC. Enterprise clients, sharp edges, zero drama.

Learned early how to debug across borders and keep large systems civilized.

Early signal: global support, operator instinct, and a taste for technical elegance.

2011

Active Global Support

SAP

Technical consulting and global customer support across Europe, the Americas, Central America, and Oceania

Europe to Oceania. Germany, France, the US, Mexico, Australia, Switzerland. A wide support map.

Corona, Budweiser, Lindt, GM. Different industries, same demand: clarity under pressure.

Technical consulting at global scale, with enterprise tempo and cross-region rhythm.

Less help desk, more global control room.

2015

Technology Department

Ant Financial

Trillion-scale data processing, big data analytics, and platform monitoring

Trillion-scale data. Big data pipelines. No small numbers, no sleepy systems.

Merchant rails and transaction monitoring, always close to the pulse.

Built a real appetite for telemetry, signal, and platforms that talk in real time.

Where fintech stopped being abstract and became infrastructure.

2017

Technology Department

Mastercard

Domestic switching and clearing system design, large-scale web delivery, and technical leadership

Designed Mastercard's first domestic switching and clearing system. Heavy-metal architecture.

Led a 50-person team and shipped the full web estate around it.

Payment rails, delivery pressure, and enough moving parts to stay interesting.

System design with leadership bandwidth. Less slideware, more launch.

2024

Technology Department

NUCC

Switching and clearing system launch assurance, optimization, and ongoing platform improvement

Same clearing bloodline, different chapter: launch, stabilize, iterate.

Took the system live, kept it clean, and tuned it under real traffic.

Post-launch work meant performance, reliability, and the quiet art of continuous improvement.

Not just go-live. Stay-live.