4xxi

4.95/5 (5 Reviews)

Web and mobile development

4xxi is a world-class web & mobile development company helping Startups, SMB and Enterprises to solve their business problems, accomplish goals, increase revenues and cut costs. We change industries. And even people's lives. We have a deep product exp ... Read more
$25 - $49/hr
Russia, Russia
50 - 249
2008
4xxi
4.95/5 (5 Reviews)
Web and mobile development
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Top development team
Reviewed on 19/9/17 by Emily Jipson
Role: General Manager & Chief Product Officer at WorthFM
4xxi has been a great partner to WorthFM. I appreciate how they've grown with us, providing services ranging from in-depth architectural support to design. The project manager is the best I've ever worked with, understanding our business needs and helping craft technical specs that allowed for a seamless product development execution.

What do you like most about the company?

Excellent partnership and commitment to quality

Rating breakdown
Quality
Reliability
Ability
Overall
Services:
Web Development
Project Budget:
$10001 to $50000
Project Duration:
52 Weeks
Project Status:
In progress
Review for 4xxi
Reviewed on 30/8/17 by Konstantin Seregin
Rating breakdown
Quality
Reliability
Ability
Overall
Services:
Mobile App Development
Project Status:
Completed
Amazing to work with. Super smart. Super responsive.
Reviewed on 24/8/17 by Michael Sher
Role: Founder at Groupdolists
Blessed that I found them almost 5 years ago! Just paid my 47th invoice and happy to pay them. Quality work. Quality people. Quality everything. We are NYC based and the time difference works perfectly for us.

What do you like most about the company?

Speed. Quality of product. Responsiveness. Energy. Passion. Brains. Ability to quickly find quality candidates to fill various positions when we need to expand the development team.

What they should improve on?

Nothing, honestly.

Rating breakdown
Quality
Reliability
Ability
Overall
Services:
Mobile App Development
Project Budget:
$200000+
Project Duration:
100+ Weeks
Project Status:
In progress
4xxi Exceeded Expectations
Reviewed on 22/8/17 by Mara Berkman Landis
Role: Founder at NutmegAspirin.com
A friend recommended 4xxi to build a business website. Working with them was extremely professional. They are honest and deliver a great product. They custom built a high functioning, fantastic site. They came in on budget and on time. And they are always available for any tweaks or fixing glitches. Response time is almost immediate. They also brought many ideas to the table that we implemented. They offered their opinions based on experience rather than just implementing what we wanted. Their advice was greatly appreciated.

What do you like most about the company?

Easy to work with, extremely reliable and delivers.

What they should improve on?

They are Russian. THey speak English but may not catch typos!

Rating breakdown
Quality
Reliability
Ability
Overall
Services:
Web Development
Project Budget:
$10001 to $50000
Project Duration:
8 Weeks
Project Status:
In progress
Woolmark Prize
Reviewed on 9/8/17 by David Nadezhdin
Role: Co Founder, CEO at SIG.NUM
We wanted to create a promotional site for the international competition Woolmark Prize with a unique visual algorithm by which our users could create and promote derivative works based on 12 pieces by leading designers. The challenge was to launch the website in very limited time.
The project started in December 2015 and was completed in 1 month. The project was delivered on time!

What do you like most about the company?

We just provided 4xxi the concept of the project and the designs. We needed: a website (backend and frontend) + server infrastructure setup & support. Due to the limited time we had a lot of calls to finalize the scope.

Rating breakdown
Quality
Reliability
Ability
Overall
Services:
Web Development
Project Budget:
$10001 to $50000
Project Duration:
12 Weeks
Project Status:
Completed
Company Executive Interview
Evgeny Scherbak

4xxi is World-class technology partner & Startup Launcher based in London with 3 international development hubs. My role as VP of Product includes business development and branding on the global market.

Evgeny Scherbak, VP of Product, 4xxi

Read Full Interview
Services
  • Custom Software Development
  • Mobile app development
  • Web development
About 4xxi

4xxi is a world-class web & mobile development company helping Startups, SMB and Enterprises to solve their business problems, accomplish goals, increase revenues and cut costs.

We change industries. And even people's lives.

We have a deep product expertise in FinTechEdTech and MedTech industry. Also we can create and like products with Big DataArtifical Intelligence and Machine Learning. There are more than 80 excellent global projects in our portfolio, most of them regularly get publications in Forbes, TechCrunch, New York Times, Yahoo, Business Insider etc.

We are a certified partner of SensioLabs.

Our concise technology stack:
Symfony / PHP / PostgreSQL / MySQL / MongoDB / Redis / RabbitMQ / React / Redux / PostCSS / Ruby / Rails etc.

Key Clients

Trivago, Centrallo, AdvisorEngine, WorthFM, Charge.Auto, Loji, Bell, Megafon, Kinder, Gillette, Well, PayQR, NutmegAspirin, Newtonew, etc.

Focus Area
Services
Client Focus
Industry Focus
PORTFOLIO
Financial & Payments
$500000+
100 Weeks
Other Industries
$50001 to $100000
69 Weeks
Consumer Products
$10001 to $50000
70 Weeks
Business Services
$50001 to $100000
72 Weeks
Utilities
$100001 to $500000
100 Weeks
Healthcare & Medical
$10001 to $50000
48 Weeks
Advertising & Marketing
$50001 to $100000
100 Weeks
Business Services
$50001 to $100000
24 Weeks
Financial & Payments
$10001 to $50000
16 Weeks
Media
$10001 to $50000
10 Weeks
Consumer Products
$50001 to $100000
40 Weeks
Healthcare & Medical
$0 to $10000
12 Weeks
Media
$100001 to $500000
100 Weeks
Advertising & Marketing
$10001 to $50000
32 Weeks
Education
$0 to $10000
12 Weeks
Financial & Payments
$100001 to $500000
72 Weeks
Contact information
ru
4xxi
Malaya Monetnaya 2G , Saint Petersburg , Sankt-Peterburg 197101
Russia
+79046414387
ru
4xxi
Tereshkova street, 7A , Saransk , Mordovija
Russia
+79046414387
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