Custom web applications

Upsilon is a web app development company that builds high-tech web-based solutions of any complexity - from two-sided marketplaces to AI/ML applications.

Our experts leverage superior market know-how and the best-in-class technologies for web application design and development. Our solutions will raise your brand awareness, increase conversions, boost customer engagement and help your digital business get ahead of competition.

Highlights of Our Custom Web Apps

We create impactful, efficient, and easy-to-use corporate and customer-facing web apps.

High performance

We make the most of performance engineering to ensure utmost performance of your web apps. Whether it’s a geo-based application set to support thousands of locations, or a multi-vendor marketplace, we’re here to enable glitch-free experiences.

Integration capabilities

By utilizing third-party integrations, we can add the best possible features to your software solution. Improve your web app with well-built microservices, video & text messaging, reporting and analytics functionality, and more.

Security

Security is our priority in web app development. With end-to-end encryption, two-factor authentication, robust user access management implemented, all data, processes and operations within your web app will be maximally protected.

Scalability

Using our vast experience across web application development projects, we will create a custom solution that will function without a hitch right after the deployment and in future, as your business grows.

we also build:

Custom web applications we build

Web Portals

Web Portals

Our long-term experience in web portal development helps us to deliver the best result for our clients. We apply the most effective technologies to develop enterprise-grade and customer-focused, partner/vendor, learning, healthcare and other types of web portals.

Our well-trained developers know how to implement all necessary functionality and represent it in a user-friendly format. Upsilon can also develop and test websites that can handle a huge number of user traffic and requests without system failures. Web portals with a high-load scalable architecture function smoothly and reliably allowing you to provide an engaging UX and increase ROI.

Progressive Web Applications

Introduced and promoted by Google, PWA is recognized by Gartner as the one to substitute more than 50% of mobile native apps. This technology makes it possible to combine the best features of browsers and mobile apps, i.e. PWAs offer an alternative way to target and engage users and increase conversions. Why PWAs instead of web apps?

  • They act as web pages but let you engage with customers through push notifications;
  • They work across platforms and deliver a native-like user experience;
  • They work when users have a weak or unstable Internet connection thanks to the Service Workers’ technology;
  • They sync in the background and receive over-the-air updates without user interaction.
Progressive web applications
Single-page Applications

Single-Page Applications

Tap into our single-page application development services to stay competitive on the web and uncover a host of benefits for your business. We utilize the latest technology to deliver fast, efficient and flexible applications with cross-browser compatibility.

Upsilon’s engineers will combine the best features of single-page applications (SPAs) to ensure excellent performance of your solution while providing end-users with a seamless web experience.

Technologies We Use for Web Application Development

We meticulously analyze all aspects of each business and offer the best-suited combination of programming languages, frameworks, libraries, and tools to complete clients’ requirements to the fullest extent possible.

Back-end

Upsilon Python
Python
Upsilon Django
Django
Upsilon Node JS
Node JS
Upsilon FastAPI
FastAPI

Front-end

Upsilon React
React
Upsilon Next JS
Next JS
Upsilon Gatsby
Gatsby

Deployment

Upsilon Amazon EC2
Amazon EC2
Upsilon AWS CloudFront
AWS CloudFront
Upsilon Amazon S3
Amazon S3
Upsilon Amazon RDS
Amazon RDS
Upsilon AWS ECS ECR
AWS ECS ECR
Upsilon AWS Lambda
AWS Lambda
Upsilon Google Cloud Platform
Google Cloud Platform

Our projects

Slack Bot

8 weeks

to MVP

5 people

product team

$30K

MVP cost

Art Collection Management Platform

10 years

of partnership

25,000+

art collectors

CHRISTIE'S

acquired by

Case Art Collection Management Platform

Logistics Dashboard

1 month

project's time-to-market

6 people

dev team

$145K

budget of the project

Case Logistics Dashboard

View case studies

Agile Web App Development Process

We follow a low-risk web development process underpinned by continuous delivery and seamless integration into the client’s release cycle from the discovery phase through design, development, QA, and maintenance.

Discovery & Planning

This stage aims to analyze your project vision, identify potential risks and benefits, and define business goals.

Our specialists study and refine, if needed, project requirements to elaborate the best-suited tech stack, outline the project milestones, and opt for a most effective engagement model.

Design

From sketching & wireframing to pixel-perfect user interface design - we provide a full range of services that will make your web solution stand out in the market. By collaborating with our clients in Figma, we provide real-time involvement in the design process.

Development

We apply cutting-edge web development technologies and practices to create flexible, full-featured, and robust web software solutions for your business.

Testing

We take care of product quality and ensure 100% stability and error-free performance of your web solution. We offer a wide range of testing services, including UX/UI tests and automated tests for complex projects.

Deployment

In this step, we transfer the project to the client’s hosting, connect the domain and test it on the production server. By combining the benefits of Docker containers and Kubernetes, we adhere to a well-established process of application deployment, scaling, and management.

Maintenance

Through continuous monitoring and troubleshooting, performance audit, and user feedback analysis, we accelerate new features implementation while speeding up the release cycle.

Release

Iterative development creates the conditions for quicker improvements and faster releases, contributing to early value delivery while ensuring stable and error-free functioning of the web solution.

These Companies Trust Upsilon

Zhanar Serikpayeva

Zhanar Serikpayeva

Creative Consultant, Etage Group

We needed help with mobile app development, data analytics, and beacon installation to be able to collect, store, and analyze our customer data. The finished application met the requirements perfectly, with the team finding an excellent solution to collect, analyze, and store customer data. They were highly professional throughout the work, always making themselves available, and responding well to any changes.

Kenny R. Lienhard

Kenny R. Lienhard

CTO, Medignition Inc

We wanted to implement a new education platform that offered online courses in finance. The scope focused on the implementation of multiple user interfaces. UpsilonIT used React, GraphQL, and GatsbyJS. UpsilonIT had strong coding skills. The app had a clean codebase and complied with all specifications. They complied with our requirements for the UI. We communicated daily via Slack.

Matt Wong

Matt Wong

CTO, Civic Connect

Upsilon’s work was always on time and met all customer expectations. Their team had an ease of communication but what was the most impressive about them is the integrity and work ethic of each member. We had a business manager, a lead architect, and a mix of senior and regular engineers. The workflow was extremely effective - the teams had a regular cadence for communication.

Dmitry Tsybin

Dmitry Tsybin

Director of Engineering, Carggo

Upsilon provided front- and backend development for an online logistics platform. The team designed and launched a business intelligence platform and ensured scalability according to customer requirements. We were most impressed by the technical background of the specialists, their meaningful approach to task accomplishment, and aspiration to deliver the results in due time. We’re also pleased with how fast the team started the development.

Ready to get started?

Scale your product and move to the next stage faster with Upsilon.

Contact Us