Who we work with
Quantum bit has invoiced international clients continuously since 2014. The companies below are drawn from that record — global consultancies and media networks, venture-backed startups, established product firms and research institutions. Some engagements are covered by non-disclosure agreements and are not listed here.
Relationships worth naming
A few engagements shaped the company more than the rest — either because of who the client was, or because of how long they kept us.
McKinsey & Company
Miramar, FL, USA · 2018 – 2020
Backend, mobile and UX engineers supplied to an internal product team.
Activision Blizzard Media Networks
New York, NY, USA · 2016 – 2018
Continued engagement after Activision Blizzard's acquisition of MLG.
MLG · Major League Gaming
New York, NY, USA · 2014 – 2016
Our first international client, from the company's first year.
Bright Horizons
Newton, MA, USA · 2025 – present
Product engineering on the Sittercity platform.
Signify Technology Group
London, United Kingdom · 2022 – 2023
Engineering capacity for a specialist technology staffing group.
Big Room Studios
Portland, ME, USA · 2015 – 2024
A decade-long partnership and our longest-running client relationship.
Blyott NV
Oostkamp, Belgium · 2024 – present
Software for real-time asset tracking in healthcare environments.
ALSOFT · Flaminem
Warsaw, Poland · 2021 – present
Ongoing product development for the Flaminem platform.
Work delivered as an extension of another team
For many years Quantum bit operated as the functional engineering extension of Big Room Studios, a Maine-based agency. Under that arrangement our engineers worked on the agency's end clients directly — embedded in their delivery teams, on their codebases — without a contract in Quantum bit's name.
2019 – 2024 · through Big Room Studios
Inflight service management and onboard retail software for the airline industry. Our engineers worked on the eGate product directly, embedded in the delivery team.
We list these separately because the commercial relationship sat with the partner agency. The engineering was ours.
Some of the companies we have delivered for
McKinsey & Company
Activision Blizzard Media Networks
MLG · Major League Gaming
Bright Horizons
Signify Technology Group
Big Room Studios
Blyott NV
ALSOFT · Flaminem
Art Systems
Mojoverse, Inc.
DEX, Inc.
TellTail Holdings, Inc.
Earplay, Inc.
AMRO Systems
Alakazam, Inc.
Theory and Principle
Kala LLC
Backlog Zero, Inc.
The Affinity Project
The Yarn Corporation
Fluent Financial Technologies
Verabana
Alpine Design Works
Pabius Corp
Work closer to home
Alongside the international practice we take on Croatian product work, research collaborations and general engineering commissions.
University of Zagreb · Faculty of Transport and Traffic Sciences
ARAS Digital Products d.o.o.
SmartStart d.o.o.
References available on request.
If you would like to speak to someone who has worked with us, ask — we will put you in touch.