JavaScript and React js development services

With 10+ years industry expertise, our JavaScript and React.JS development services cover a full set of technologies: JavaScript (ES6), React.JS, Redux.JS.

Working with both startups and blue chips, we can fit your budget expectations and deadlines based on time-and-material and dedicated team models and agile delivery.

javascript development services

JavaScript software development

Custom JavaScript development

  • System analysis
  • Front-end development 
  • Support and administration of a custom solution

Redesign of legacy systems

  • Re-engineering 
  • Optimization


  • API integration 
  • Certification support (PCI DSS, etc.) 

Testing and QA

  • Functional manual and automated testing 
  • Regression 
  • Performance and stress testing


  • Migration of legacy systems from one supplier to another 
  • API updates
  • Framework versions migration

Dedicated teams

  • Allocation of dedicated software development teams 
  • Augmention of our clients’ in-house IT department

Being experienced in high-load front- and back-end solutions for airlines, we feel comfortable with projects of any scale and complexity. We are in our alley when dealing either with JavaScript single-page applications or complex enterprise web-sites development.

By choosing Reslive software development services, you get transparent working processes with monthly reports; tailor-made team that responses to all your needs and understanding of every project’s iterations.

Featured customers

Web backend developmnet and IoT development
back-end web and mobile development
web mobile backend frontend development
"Resliv helped facilitate the design of S7 Airlines new 365/24/7 retail platform, S7 Travel Retail, for Selling and Servicing of S7 Airlines products and beyond. Resliv effectively helped define key deliverables and also supported us through the execution and migration process to realise the distribution platform, development processes, technology and to enable our superior customer experience in line with our strategic objectives and goals".
Dmitry Chuyko
CEO at S7 Travel Retail

Selected case studies

Blockchain application development for Devery

Blockchain application development for Devery Blockchain Development of REST API, based on Devery.js protocol, and an administrative panel  Our project’s highlights Complete front- and back-end development  UI/UX development REST API development The Client Devery is a blockchain startup that built a whole ecosystem for verifying and controlling digital and physical goods’ and services’ pathways. They […]

Front-end development for Cyprus Airways

Front-end development for Cyprus Airways Travel Website front-end development for international flights distribution and ancillary merchandising in B2B and B2C sectors Our project’s highlights Single Page Application  Intuitive and flexible UI based on BEM methodology Multi localization, including Latin, Cyrillic, Chinese, Arabic & Greek  Responsive cross-browser solution A human-centric attractive layout Scalable website The Client […]

Front-end Development for S7 Airline website

Front-end Development for S7 Airline website Travel Full-fledged front-end development for selling and cross-selling air and ground travelling services Our project’s highlights Integration with third-party suppliers Multi-language support Fully customizable and intuitive interface Flexible booking flow The Client The client, S7, is the leading Russian airline cooperated with Resliv, where our company delivered comprehensive web-site […]

Frequently asked questions

Sure. We start from a free consulting session after we get and analyze all the initial customer requirements and inputs. During the consulting session, we clarify all the possible questions.