4xxi
4.95/5 (5 Reviews)

4xxi

4.95/5 5 Reviews
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 ...
  • Pricing: $25 - $49/hr
  • Location: Russia
  • Employees: 50 - 249
  • Founded: 2008
Reviews (5)
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client Reviews
Top development team - by , 2017-09-19 04:49:49
5/5stars
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 ...
Emily Jipson, General Manager & Chief Product Officer at WorthFM
Verified Reviewer
1 review
Joined Sep 2017
Top development team
Reviewed 2 months ago 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

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Review for 4xxi - by , 2017-08-30 09:24:25
5/5stars
...
Konstantin Seregin,  at umnayashkola
Verified Reviewer
1 review
Joined Aug 2017
Review for 4xxi
Reviewed 2 months ago by Konstantin Seregin
Rating breakdown
Quality
Reliability
Ability
Overall

Services: Mobile App Development
Project Status: Completed

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Amazing to work with. Super smart. Super responsive. - by , 2017-08-24 13:00:01
5/5stars
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. ...
Michael Sher, Founder at Groupdolists
Verified Reviewer
1 review
Joined Aug 2017
Amazing to work with. Super smart. Super responsive.
Reviewed 2 months ago 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

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4xxi Exceeded Expectations - by , 2017-08-22 13:34:17
5/5stars
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 ...
Mara Berkman Landis, Founder at NutmegAspirin.com
Verified Reviewer
1 review
Joined Aug 2017
4xxi Exceeded Expectations
Reviewed 2 months ago 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

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Woolmark Prize - by , 2017-08-09 17:35:54
5/5stars
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 ...
David Nadezhdin, Co Founder, CEO at SIG.NUM
Verified Reviewer
1 review
Joined Aug 2017
Woolmark Prize
Reviewed 3 months ago 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

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