4xxi

5.0 (1 Review)

Web & mobile development company 4xxi Russia

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 FinTech, EdTech and MedTech industry. Also we can create and like products with Big Data, Artifical 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.

Founded2008

Strength51 to 250

Phone79046414387

Cost Per Hour$26 - $50

All Reviews

David Nadezhdin
   SIG.NUM
   Co Founder, CEO
   $10001 - $25000
  2017-08-09

Woolmark Prize

Reliability

Quality Of Work

Creativity & Expertise

Timelines & Budget

Overall Rating

Services: Web and Software Development

Status: completed

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.

Certifications

SensioLabs

Key Clients

Key Clients: Trivago, Centrallo, AdvisorEngine, WorthFM, Charge.Auto, Loji, Bell, Megafon, Kinder, Gillette, Well, PayQR, Nutmeg Aspirin, Newtonew, Etc.

Portfolio

Loji

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LOJI is an iMessage extension which lets users search and forward different places with complete information (address, telephone, website) direct to iMessage in the form of interactive icons.

StartUp, Entertaiment

What we did: Backend, iOS App

To see more, click here: https://4xxi.com/en/project/loji

Well

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Well is Uber for doctors. The service allows for the automation of the system for putting together a doctor's schedule, with appointments, payments and reports.

MedTech, StartUp

What we did: Website, Frontend, iOS App

To see more, click here: https://4xxi.com/en/project/well

Newtonew

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Newtonew is an information media project about education, and addressing the most relevant and useful concepts, theories and methodologies as well as techniques and research, goods and services. We talk about how education and science are developing and changing today, and what they may become in the near future. Only the most important and interesting.

EdTech, StartUp

What we did: Website, Backend, Frontend, iOS App

To see more, click here: https://4xxi.com/en/project/newtonew

Onefit

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Onefit is a subscription membership of thousands of fitness clubs. The user purchases a monthly subscription, after which he or she is able to become a member of any of the clubs that belong to Onefit with no additional payment. The service operates in Moscow and St Petersburg.

StartUp, Fitness

What we did: Website, Backend, Frontend

To see more, click here: https://4xxi.com/en/project/onefit

PayQR

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PayQR is an app that enables payment of bills, purchases and invoices with the use of QR codes. Once the app has been downloaded and the user's bank card has been added, it only takes one click to pay utility bills or buy a cup of coffee in a cafe.

FinTech, StartUp

What we did: Android App

To see more, click here: https://4xxi.com/en/project/payqr

Industry Index

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Industry Index is a catalogue of companies with current evaluations from leading marketing experts. Combining expert and consumer evaluations, this project makes it possible to pinpoint someone to implement practical marketing or IT challenges.

AdTech, StartUp

What we did: Backend, Frontend

To see more, click here: https://4xxi.com/en/project/industryindex

Nutmeg Aspirin

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Nutmeg Aspirin is a media portal where people discuss their stories of healing, share natural remedy recipes that they have tested themselves, simply ask each other for help or give advice to others unable to deal with their own health problems themselves, or for people who just want to look and feel better. A unique design was developed for the site, as well as a user interface which enables simple creation, comment and review of articles and questions.

?edia, Healthcare, StartUp

What we did: website, backend, frontend

To see more, click here: https://4xxi.com/en/project/nutmeg-aspirin

Woolmark Prize

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Promo site for the International Woolmark Prize competition. With the help of a unique visual algorithm, developed specifically for this project, users create and promote derivative works based on 12 pieces by leading designers.

Promo

What we did: Website, Backend, Frontend

To see more, click here: https://4xxi.com/en/project/woolmark-prize

Charge.Auto

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We have developed a companion app for use on Android for the Charge.Auto project. The app is used by truck drivers to check the vehicle's systems, and for submitting reports about technical performance tests at the start and end of each working day. The automated system for data retrieval from monitors allows the driver to stay abreast of potential problems with the vehicle. The companion app has an important feature, which is a smart system for automatic authorization of the app and the vehicle by means of an exchange of encrypted keys with no human input. When working normally, the app tracks the status of orders and the route, thus making it operationally possible to update on any changes in orders, either from the system or the driver.

Tech, Electric Cars

What we did: Android App

WorthFM

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WorthFM is a platform for normal users to save and invest financial resources. Through a simple set of steps, WorthFM makes it possible to open a bank account, transfer money, select the optimum portfolio and receive investment revenue. The service also enables pension tax rebates. The whole process is automated from start to finish.

FinTech, StartUp

What we did: Website, Backend, Frontend

To see more, click here: https://4xxi.com/en/project/worthfm

Auditarium

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Online auditor marketplace. Helps audit companies and auditors find each other with ease. There is a system of tenders in place for the publication of contracts and the possibility of selecting the best practitioners. Integration with the website of the Russian Finance Ministry makes it possible automatically to identify and confirm the experience and skills of the auditors.

StartUp, Marketplace

What we did: Website, Backend, Frontend

To see more, click here: https://4xxi.com/en/project/auditarium

Trivago

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Service for holding automated video interviews at Trivago. Candidates fill out the form step by step and reply to questions (in written form or video), and then the result is sent to the corporate HR system.

HR

What we did: Website, Backend, Frontend

To see more, click here: https://4xxi.com/en/project/trivago

AdvisorEngine

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Service for financial advisers that enables total automation of their work, from opening an account for a client and signing documents, to creating a portfolio and working on it by using mathematical and economic modeling. The service has a high level of integration with leading financial organizations.

FinTech, StartUp

What we did: Website, Backend, Frontend

To see more, click here: https://4xxi.com/en/project/advisorengine

Sprut

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Management system for pools of commercial posts on the My World social network from Mail.ru. Integration between api mail.ru and CPA ad1 system allows to create ad posts and send them to the advertising slots in the social network, targeted according to audience and an intellectual algorithm to determine the number of displays for the optimum financial return.

CRM, CPA Systems

What we did: Website, Backend, Frontend

To see more, click here: https://4xxi.com/en/project/sprut

IFMO — Game of light

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Interactive Physics Olympiad that gives winners privileges when applying to ITMO University

EdTech

What we did: website, backend, frontend

To see more, click here: https://4xxi.com/en/project/ifmo-game-of-light

Centrallo

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Centrallo is an app to create notes and lists for organized individuals. It enables intelligent organization of information, as well as sharing of info with others and joint work. Any content can be added to Centrallo - from photos and video to hyperlinks for Dropbox, Google Drive & OneDrive. The service works on leading mobile platforms, on Apple Watch and Android Wear.

StartUp, Productivity

What we did: Website, Backend, Frontend, iOS App, Android App, Watch App, Android Wear

To see more, click here: https://4xxi.com/en/project/centrallo

4xxi

About 4xxi

Contact Details

Contact 4xxi

All Reviews

Woolmark Prize

Services & Focus

Services

Industry Focus

Client Focus

Services

Certifications

Key Clients

Portfolio

Loji

Well

Newtonew

Onefit

PayQR

Industry Index

Nutmeg Aspirin

Woolmark Prize

Charge.Auto

WorthFM

Auditarium

Trivago

AdvisorEngine

Sprut

IFMO — Game of light

Centrallo

Contact 4xxi