Staff Front-end Engineer (Contact Center)

Technology Stack:

JavaScript, TypeScript, React.js, Angular.js, HTML, and CSS




Staff Front-end Engineer (Contact Center)

JettyCloud looks for IT professionals on behalf of RingCentral to join its team in Sofia.

We are looking for a talented Front-end Engineer to join our team. In this position, you will work in one of the four front-end teams on Contact Center UI with product owners, designers, architects, and other front-end engineers to help develop the web-based application interfaces with emphasis on seamless user experience.

Contact Center UI is a set of applications consisting of an administrative console, an agent application, an analytical portal, various internal npm libraries, and a UI kit. Our UI stack is a combination of AngularJS and React. We are actively working to move fully to the react ecosystem and update all applications to use React 18 and TypeScript.

We are looking at restructuring our UI towards the micro frontend architecture using the webpack 5 federation module. We are big believers in the comprehensive testing automation and CI/CD.

You should be motivated, organized, excited about technology and SaaS products, a thorough critical thinker, and relentless when it comes to code quality, scalability, latency, and platform stability. Our culture is motivational, constructive, and positive. We value teamwork, camaraderie, and collaboration. If you’re up for a fun challenge, we want to hear from you.


  • Review requirements and translate them into technical implementation;

  • Write component and unit tests for your code by using react-testing-library and jest;

  • Build/Create modern web applications using react ecosystem;

  • Work with inner npm packages and UI kit;

  • Perform code reviews for other developers and continuously look for opportunities to improve and optimize code quality;

  • Ability to analyze, troubleshoot, and solve a wide range of technical problems;

  • Effectively communicate and collaborate on design and technology with management and other engineering teams;

  • Follow RingCentral internal coding style and principle to design and implement business system based on requirements.


  • Bachelor’s degree in Computer Science, Engineering or a related field or equivalent, is required;

  • Experience in building complex web-based user interfaces for enterprise grade commercial cloud services;

  • 7+ years experience with JavaScript, TypeScript, React.js, Angular.js, HTML, and CSS;

  • 4+ years experience with React.js ecosystem libraries like a redux, saga, hook-forms;

  • Familiarity with bundling process and how to configure webpack/rollup from scratch;

  • Understanding how to use browser development tools and how to use them in JavaScript code;

  • Willingness to take ownership of the tasks and to achieve targets with minimum supervision;

  • Experience with SaaS, distributed, highly available, event driven systems;

  • Strong problem solving skills, can-do attitude;

  • Great communication skills; ability to effectively present ideas and thoughts;

  • Experience with Contact Center solutions is a HUGE plus.

  • English - Intermediate level or above.

We offer:

  • Well-coordinated professional team.

  • Cutting edge technologies, interesting and challenging tasks, dynamic project, great opportunities for self-realization, professional and career growth.

  • Additional Health and Life Insurance Package.

  • Employee Assistance Program.

  • 25 vacation days.

  • ReBenefit Platform Account with 400BGN value monthly.

Apply for job


Contact us

Write to us at or send a message to our recruiters