John Jang: Email & Phone Number

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Co-Founder, CEO at SpeakDuo|Songdo International Business District, Incheon, Republic of Korea

Position:

Co-Founder, CEO at SpeakDuo

Location:

Songdo International Business District, Incheon, Republic of Korea

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Last updated: 2026-02-19

Updated: 2026-02-19

Found email addresses for John Jang:

Business emails:

******@gmail.com

Found phone for John Jang:

+82-***-***-2714

A different John Jang?

Work Experience 15 years

Co-Founder, CEO at SpeakDuo

Jan 2022 - Current

Co-Producer, Easy Arabic (YouTube) at Easy Languages GmbH

Dec 2021 - Current

High School Teacher at Sousse International School

Sep 2021 - Mar 2022

Futures Trader at Viking House Strategies

Apr 2020 - Aug 2021

Sales Support Representative at Scalapay

Jan 2020 - Apr 2020

Religious Worker at Catholic Archdiocese of Sydney

Feb 2012 - Jan 2020

Junior Medical Officer at Western Sydney Local Health District

Jan 2011 - Jan 2012

John Jang started working in 2011, then the employee has changed 6 companies and 6 jobs. On average, John Jang works for one company for 2 years 10 months.

Education

Bachelor of Medicine, Bachelor of Surgery - MBBS at UNSW

Master of Philosophy - MPhil at The University of Notre Dame Australia

Baccellierato canonico in teologia - STB at Pontifical Gregorian University

Frequently Asked Questions

What is John Jang's email address?

SignalHire found a verified business email address for John Jang: ******@gmail.com.

What is John Jang's phone number?

SignalHire found a verified phone number for John Jang: +82-***-***-2714.

How do I contact John Jang at SpeakDuo?

You can reach John Jang through SignalHire by unlocking their verified email and direct phone number (free signup, no credit card needed). SignalHire is the fastest route if you need their contact details immediately.

What is John Jang's professional background?

John Jang has 15 years of professional experience. They have held roles including Co-Producer, Easy Arabic (YouTube), High School Teacher, and Futures Trader at companies such as Easy Languages GmbH, Sousse International School, and Viking House Strategies. Their education includes Bachelor of Medicine, Bachelor of Surgery - MBBS from UNSW, and Master of Philosophy - MPhil from The University of Notre Dame Australia.

Is John Jang's contact information up to date?

Yes. John Jang's SignalHire profile was last updated on 19 February 2026, reflecting their current position as Co-Founder, CEO at SpeakDuo.

John Jang Namesakes

Name

Company

Position

John Jang

Autodesk

Sr.Technical Solution Executive

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John Jang

Apple

Hardware Engineer

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