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James ChenPortfolio by TerraScale
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James Chen.
Media Buyer & Campaign Operations.

Also known as Chen Yiming. I connect traffic buying, tracking and testing so campaign decisions have a clear basis.

The work I do

My experience includes APAC push campaigns and iGaming, alongside work with pop, native, RTB and specialist adult traffic networks. My practical focus is buying traffic, reconciling RedTrack S2S signals, and improving creative and landing pages.

TerraScale is my portfolio brand. It brings together selected work, practical methods and the reasoning behind campaign decisions.

iGaming is part of my experience. The work shown here focuses on campaign execution, measurement, controlled tests and operational safeguards that a hiring team can examine.

A role-focused profile

Target roleMedia Buyer · Tracking & Campaign Operations
LocationTaiwan · UTC+8
Working languageEnglish and Mandarin
ChannelsPush, pop, native, adult traffic networks and RTB
Practical focusPaid traffic, RedTrack S2S, creative and landing-page testing, and approval boundaries for automation
RelocationCan be discussed by country and lawful work arrangement. No existing overseas work authorization is claimed.
Market experienceAPAC campaigns, including iGaming

For a role-specific CV, contact me directly.

Career experience

Senior Media Buyer / Performance Marketer

Freelance · February 2018–present

Run third-party paid-traffic campaigns, review placements and test creatives and interactive landing pages. Work with RedTrack, Voluum and Binom tracking and S2S postbacks; use network APIs for reporting and campaign workflows.

Retail Media Buyer

Contract work with an e-commerce company · October 2021–October 2024

Ran Shopee and momo retail media campaigns, optimized product listings and product pages, and coordinated promotions with campaign budgets and bidding.

Education

B.A., Foreign Language · Chaoyang University of Technology
September 2006–June 2010

This career summary draws on my LinkedIn profile and my clarification of the contract arrangement. Historical performance figures are not presented as verified results. See my LinkedIn profile.

Capabilities you can examine

Campaign decisionsPlacement pause, hold, bid and scale method
Method demonstration with fictional examples.
Tracking investigationRedTrack-to-source S2S troubleshooting
A practical investigation sequence, not a claimed client result.
Controlled testingCreative and landing-page matching
A single-variable test design with explicit limits.
Campaign operationsWorker-first operations project
My rules and approval boundaries, with Claude-assisted implementation. Overall shadow mode; limited live actions and incomplete independent validation.

Explore proposed methods for creative–page interaction, retail incrementality and reliable event counting. These notes demonstrate reasoning with fictional examples; they are separate from verified work results.

Selected tools

RedTrack, Voluum and Binom for tracking; ad-network APIs for reporting and campaign workflows. Tools describe hands-on experience, not certifications.

Older numerical performance claims still require original supporting records.

Explore how I think

Read the case studies and method demonstrations, or share a role so the discussion can focus on the responsibilities that matter to your team.

Read the new methods on creative diagnosis, delivery constraints and verification →

Looking for a hands-on Media Buyer?

Share the role, the team and where the work happens.

Discuss a role