William Stefan Hartono
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William Stefan Hartono Email & Phone Number

ex-Cuanz, ex-tiket.com, ex-Uber at 99 Group (99.co | Rumah123 | SRX)
Location: Jakarta Metropolitan Area, Indonesia, Indonesia 8 work roles 2 schools
1 work email found @tiket.com LinkedIn matched
✓ Verified May 2026 4 data sources Profile completeness 100%

Contact Signals · 1 work email

Work email w****@tiket.com
LinkedIn Profile matched
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Current company
99 Group (99.co | Rumah123 | SRX)
Role
ex-Cuanz, ex-tiket.com, ex-Uber
Location
Jakarta Metropolitan Area, Indonesia, Indonesia
Company size
223 employees

Who is William Stefan Hartono? Overview

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Quick answer

William Stefan Hartono is listed as ex-Cuanz, ex-tiket.com, ex-Uber at 99 Group (99.co | Rumah123 | SRX), a company with 223 employees, based in Jakarta Metropolitan Area, Indonesia, Indonesia. AeroLeads shows a work email signal at tiket.com and a matched LinkedIn profile for William Stefan Hartono.

William Stefan Hartono previously worked as Product Manager at 99 Group (99.Co | Rumah123 | Srx) and Co-Founder and Product Manager at Grafena. William Stefan Hartono holds M.T., Business Intelligence, 3.85 Out Of 4.00 (36 Credits) from Institut Teknologi Bandung.

Company email context

Email format at 99 Group (99.co | Rumah123 | SRX)

This section adds company-level context without repeating William Stefan Hartono's masked contact details.

{first_initial}{last}@tiket.com
76% confidence

AeroLeads found 1 current-domain work email signal for William Stefan Hartono. Compare company email patterns before reaching out.

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Profile bio

About William Stefan Hartono

I am a Product Manager coming from UX Researcher background that specializes on consumer apps. I have experience for both 0 to 1 and 1 to 10. I love foods (top 10% on Google reviewers), games, Japanese cultures, pop music, fantasy novels, and movies.

Listed skills include Javascript, Programming, User Research, User Interaction, and 16 others.

Current workplace

William Stefan Hartono's current company

Company context helps verify the profile and gives searchers a useful next step.

99 Group (99.co | Rumah123 | SRX)
99 Group (99.Co | Rumah123 | Srx)
ex-Cuanz, ex-tiket.com, ex-Uber
singapore, singapore
Website
99.co
Employees
223
AeroLeads page
Company profile
View company profile Email format
8 roles

William Stefan Hartono work experience

A career timeline built from the work history available for this profile.

Co-Founder And Product Manager

Grafena

Jakarta Metropolitan Area

We excel in revolutionizing business processes through the power of technology. With our strong expertise in digitalizing manual processes, conducting comprehensive user research, and revitalizing design, we are dedicated to driving innovation and efficiency for businesses across various industries.

Jul 2021 - Oct 2023

Lead Product Manager

Cuanz

Jakarta Metropolitan Area

  • Leading team in building the first and biggest social-invest-tech app.
  • Drove IDR 1 bio GTV in 6 months by integrating with 8 financial institutions.
  • Grew our user from <5k to 100k users in 6 months using referral.
  • Grew 98x contents in 6 months by integrating with 200 partners.
  • Set the apps for dynamic use cases, e.g. countries and settings with no deployment needed within 5 minutes.
Mar 2022 - Jun 2023

Product Manager And Senior Product Manager

Tiket.Com

Jakarta Metropolitan Area

  • Decreased 20% of loading time by decomposing and rewriting monolith into micro services.
  • Increased 20% ancillaries bookings by releasing seat selection.
  • Increased flight booking by 12% from revamping flight booking form.
  • Increased flight booking by 6% from providing COVID and multi-insurance during pandemic.
  • Created dashboard to adjust the contents of booking form freely with no deployment needed within 5 minutes.
  • Created ancillaries monitoring tools to enable Customer Service team to find errors under 1 minute.
Jun 2020 - Dec 2021

Ux Researcher And Senior Ux Researcher

Tiket.Com (Pt. Global Tiket Network)

Greater Jakarta Area, Indonesia

  • Plan and conduct initiative researches for product innovation.
  • PIC of: PayLater, Flight, Train, Events, Home, upcoming trips, hotel partners dashboard, promotion, 2FA, etc.
May 2018 - Jun 2020

Ux Researcher (Contractor) At Uber

Uber

Greater Jakarta Area, Indonesia

Conducted cross-countries (Indonesia, Malaysia, and Thailand) user research for drivers.

Nov 2017 - Mar 2018

Master Degree Student (Business Intelligence Major)

Institut Teknologi Bandung

Bandung Area, West Java, Indonesia

GPA 3.85 out of 4.00 (36 credits)

Aug 2016 - Nov 2017

Bachelor Student (Informatics Engineering Major)

Institut Teknologi Bandung

Bandung Area, West Java, Indonesia

GPA 3.60 out of 4.00 (146 credits)

Aug 2013 - Oct 2016
Team & coworkers

Colleagues at 99 Group (99.co | Rumah123 | SRX)

Other employees you can reach at 99.co. View company contacts for 223 employees →

CC Chaidir Chaidir Chaidir Chaidir Colleague at 99 Group (99.Co | Rumah123 | Srx) Jakarta, Jakarta, Indonesia, Indonesia View → IF Irgi Fahrezi S. Irgi Fahrezi S. Colleague at 99 Group (99.Co | Rumah123 | Srx) Bekasi Regency, West Java, Indonesia, Indonesia View → FK Ferry Kurniadi Sirait Ferry Kurniadi Sirait Colleague at 99 Group (99.Co | Rumah123 | Srx) Surabaya, East Java, Indonesia, Indonesia View → AR Adithyan Ravi Adithyan Ravi Colleague at 99 Group (99.Co | Rumah123 | Srx) Singapore, Singapore, Singapore View → FD Faris D. Faris D. Colleague at 99 Group (99.Co | Rumah123 | Srx) Jakarta, Indonesia, Indonesia View → VL Vennie L. Vennie L. Colleague at 99 Group (99.Co | Rumah123 | Srx) Singapore, Singapore View → IY Ike Yulia Martha Ike Yulia Martha Colleague at 99 Group (99.Co | Rumah123 | Srx) Bandung, West Java, Indonesia, Indonesia View → AR Ade Rizky Ananda Ade Rizky Ananda Colleague at 99 Group (99.Co | Rumah123 | Srx) Medan, North Sumatra, Indonesia, Indonesia View → AA Adisty Annisa Adisty Annisa Colleague at 99 Group (99.Co | Rumah123 | Srx) Bandung, West Java, Indonesia, Indonesia View → MR Mathilda Ratih Andamsuri Mathilda Ratih Andamsuri Colleague at 99 Group (99.Co | Rumah123 | Srx) Bogor, West Java, Indonesia, Indonesia View →
2 education records

William Stefan Hartono education

M.T., Business Intelligence, 3.85 Out Of 4.00 (36 Credits)

Institut Teknologi Bandung

FOCUSED ON 1. Business intelligence 2. Data analysis & modeling

S.T., Informatics, 3.60 Out Of 4.00 (146 Credits)

Institut Teknologi Bandung (Itb)

Activities and Societies: Profession and Leadership Orientation of Sekolah Teknik Elektro dan Informatika (STEI) ITB Active member of.

FAQ

Frequently asked questions about William Stefan Hartono

Quick answers generated from the profile data available on this page.

What company does William Stefan Hartono work for?

William Stefan Hartono works for 99 Group (99.co | Rumah123 | SRX).

What is William Stefan Hartono's role at 99 Group (99.co | Rumah123 | SRX)?

William Stefan Hartono is listed as ex-Cuanz, ex-tiket.com, ex-Uber at 99 Group (99.co | Rumah123 | SRX).

What is William Stefan Hartono's email address?

AeroLeads has found 1 work email signal at @tiket.com for William Stefan Hartono at 99 Group (99.co | Rumah123 | SRX).

Where is William Stefan Hartono based?

William Stefan Hartono is based in Jakarta Metropolitan Area, Indonesia, Indonesia while working with 99 Group (99.co | Rumah123 | SRX).

What companies has William Stefan Hartono worked for?

William Stefan Hartono has worked for 99 Group (99.Co | Rumah123 | Srx), Grafena, Cuanz, Tiket.Com, and Tiket.Com (Pt. Global Tiket Network).

Who are William Stefan Hartono's colleagues at 99 Group (99.co | Rumah123 | SRX)?

William Stefan Hartono's colleagues at 99 Group (99.co | Rumah123 | SRX) include Chaidir Chaidir, Irgi Fahrezi S., Ferry Kurniadi Sirait, Adithyan Ravi, and Faris D..

How can I contact William Stefan Hartono?

You can use AeroLeads to view verified contact signals for William Stefan Hartono at 99 Group (99.co | Rumah123 | SRX), including work email, phone, and LinkedIn data when available.

What schools did William Stefan Hartono attend?

William Stefan Hartono holds M.T., Business Intelligence, 3.85 Out Of 4.00 (36 Credits) from Institut Teknologi Bandung.

What skills is William Stefan Hartono known for?

William Stefan Hartono is listed with skills including Javascript, Programming, User Research, User Interaction, User Experience, Software Documentation, Css, and Microsoft Office.

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