BI & Big Data Consulting & SI UX/UI Design Web Development
Confidential
May 2024 - Jan. 2026

5.0

Quality: 5.0

Schedule: 5.0

Cost: 5.0

Willing to Refer: 5.0

"Digitum delivered high-quality, well-structured, and scalable solutions."

May 21, 2026

Global Head of Data Analytics & AI Solutions, Visa Inc

Kostiantyn Chumachenko

Other industries
San Francisco, California
10,001+ Employees
Online Review
Verified

Digitum designed and developed a web platform for a payment system company. The team delivered front- and backend development, performance optimization, Power BI automation, and a staff incentive platform.

Digitum delivered a premium loyalty platform that met all the client's initial requirements. The team's solution significantly streamlined loyalty program management and directly contributed to higher engagement and redemption. Moreover, Digitum provided excellent value for money.

BACKGROUND

Introduce your business and what you do there.

I’m the global head of data analytics and AI solutions at Visa Inc., a leading global payment system.

OPPORTUNITY / CHALLENGE

What specific goals or objectives did you hire Digitum to accomplish for Visa Inc’s Data Analytics and AI solutions?

We needed support with our loyalty program. We hired Digitum to design an intuitive and premium UX/UI for our web application, deliver a scalable web application, streamline loyalty program management, provide technical and customer support, and provide dashboards and data preparation for data analytics.

SOLUTION

What was the scope of their involvement?

Digitum designed and delivered a mobile-adaptive, standalone web platform tailored to affluent clients, covering UX/UI, front-end and back-end development, and performance optimization. The team also provided Power BI automation and a staff incentive platform.

What is the team composition?

We worked with 6–10 teammates from Digitum.

How did you come to work with Digitum?

We found Digitum through a referral. We chose them over other options because they had high ratings, their pricing fit our budget, and they offered good value for the cost.

What is the status of this engagement?

We worked together from May to January 2026.

RESULTS & FEEDBACK

What evidence can you share that demonstrates the impact of the engagement?

Digitum delivered a premium loyalty platform that met all our initial requirements. The platform significantly streamlined loyalty program management and directly contributed to higher engagement and redemption. Thanks to Digitum’s technical execution and ongoing support, the program redemption rate exceeded our initial targets. We also saw improved app ratings in the App Store and Android Market and an increase in daily active users (DAU) and monthly active users (MAU).

How did Digitum perform from a project management standpoint?

Digitum delivered high-quality, well-structured, and scalable solutions. The platform met all technical and UX requirements and performed reliably under real-world usage. The team delivered all milestones on time. Digitum maintained clear planning and proactive communication throughout the project lifecycle. We communicated via in-person meetings, virtual meetings, and emails or messaging apps.

What did you find most impressive about them?

Digitum provided excellent value for money. The outcomes, particularly the redemption uplift, justified the investment.

Are there any areas they could improve?

I can’t think of anything for Digitum to improve.

RATINGS

5.0

"Digitum combines strong technical expertise with a clear understanding of business goals. Their focus on performance and UX quality"

API Development Application Testing Custom Software Development
Confidential
Jan. 2025 - Mar. 2026

5.0

Quality: 5.0

Schedule: 4.5

Cost: 5.0

Willing to Refer: 5.0

"The team demonstrated a quick response rate, a reasonable timeline, and good timing for delivering the results."

May 8, 2026

CEO, BigData UA

Sergiy Boyko

Media
Kyiv, Ukraine
11-50 Employees
Online Review
Verified

Digitum B.V. added new features to a big data software solution for a media company. The team also optimized the hardware infrastructure and transferred the original software from MS SQL to ClickHouse.

Thanks to Digitum B.V.'s efforts, the client saw a 3.6x increase in calculation speed and reduced the number of servers needed for their software from 12 to 8. The team delivered work on time and responded quickly to the client's needs. The team also provided multiple solutions for each issue.

The client submitted this review online.

BACKGROUND

Please describe your company and position.

I am the CEO of BigData UA

Describe what your company does in a single sentence.

We provoding the monitiring and viewership ratings of channels and other contetnt on OTT Platfortms in Ukraine

OPPORTUNITY / CHALLENGE

What specific goals or objectives did you hire Digitum B.V. to accomplish?

To add additional functionality for software- like IP adress based territoty definitions etc
Optimize the hardware infrastructure- reduce total number oif sertvers used for software and calculation
To transfer origanl software Bigdata Ratings from MS SQL to ClickHouse

SOLUTION

How did you find Digitum B.V.?

Referral

Why did you select Digitum B.V. over others?

High ratings
Good value for cost
Referred to me

How many teammates from Digitum B.V. were assigned to this project?

2-5 Employees

Describe the scope of work in detail. Please include a summary of key deliverables.

The software was succesfuly transfered to the new database (ClickHouse), which alloiud to increase the speed of calculations for our customers in 3,6 times.

As well- as reduce the numbers of servers which we need for our software allocations- from 12 to 8.

Additional features have been developed-sucg is building the new target audience base on the analysys of OTT user's OS using AI model (Geminy), geotargeting of OTT users , etc

RESULTS & FEEDBACK

What were the measurable outcomes from the project that demonstrate progress or success?

reduces time for parcing 2,3 times, increasing speed (reduce time spent) of calculations for different reports- 3,2 times.

Describe their project management. Did they deliver items on time? How did they respond to your needs?

The team demonstrated a quick response rate, a reasonable timeline, and good timing for delivering the results.

What was your primary form of communication with Digitum B.V.?

In-Person Meeting

What did you find most impressive or unique about this company?

Always Proposed several solutions ( on your choice) for issues and targets with exlonation what the pluses and minuses of that variants you will get.

Are there any areas for improvement or something Digitum B.V. could have done differently?

have no ideas

RATINGS

5.0

Digitum

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Digitum Reviews

Web Dev, Design & Data Consulting for Payment System Company

BACKGROUND

OPPORTUNITY / CHALLENGE

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RATINGS

Custom Software Development for Media Company

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Visa

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Digitum

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8 Languages that we service

3 Timezones that we service

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Digitum Reviews

Web Dev, Design & Data Consulting for Payment System Company

BACKGROUND

OPPORTUNITY / CHALLENGE

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RATINGS

Custom Software Development for Media Company

BACKGROUND

OPPORTUNITY / CHALLENGE

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Locations (1)

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Visa

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