Senior Ruby Software Engineer (RCX)

Technology Stack:

MySQL, MongoDB, Redis, API, Ruby (and Ruby on Rails), JavaScript or CSS.




Senior Ruby Software Engineer (RCX)

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

RingCentral Bulgaria is a new European branch of an American company RingCentral. JettyCloud is a software R&D center that works for RingCentral. Due to our long-term partnership we help the company to find talented engineers who will work on #1 cloud communications solution.

RingCentral's cloud-based communications platform connects more than 2 million users across the world. 

As a member of the RingCentral RingCX Engineering team, you’ll tackle complex, mission-critical problems and build the platform that’s changing the way the world communicates. RingCentral RingCX is CCaaS solution that serves businesses large and small, providing highly reliable uptime, scalability and flexibility to support any business need or workflow. 

We are looking for Software Engineers that will work and collaborate on teams and projects with responsibility for designing and delivering secure, distributed, scalable and fault tolerant services, end-user applications and APIs. In this role, you will have an opportunity to use your engineering expertise & leadership in the delivery of cloud-hosted (AWS, Azure) SaaS systems. You will work on complex, event driven services adhering to agile engineering practices and processes with a strong focus on automation. Driving improvement in all aspects of your work will be all part of your day to day with the RingCX team. 

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!


  • Work with architects and business owners on clarifying requirements, provide feedback, offer technical solutions, provide implementation estimates. 

  • Plan and coordinate work between cross-functional and geographically distributed teams to assure timely implementation and delivery to production environment.

  • Be a technical leader and a go-to person for your area, and a sounding board for other peers in other areas and teams.

  • Coach junior team members, work across engineering teams, provide technical leadership and make it happen. 

  • Work in close communication with RingCX SRE team on performance and quality of the RingCX services.

  • Review requirements and translate them into technical implementation – focusing on responding with output that delivers on the business value.

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

  • Promote and contribute to all aspects of employing automation, across all test layers and development pipelines. (from unit through functional up to and including end to end/system/solution test).

  • Seek to maximize test coverage across all test layers by contributing to test case backlog and implementation using wide variety of test and test automation frameworks.

  • Push boundary for continual quality and automation on code base and product.

  • Build/Create modern backend services and APIs to operate in real-time/near real-time system/domain.

  • Perform design, architecture and code reviews for your RingCX team & other developers and continuously look for opportunities to improve and optimize code quality.

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

  • Push for continual improvements of engineering processes and tools.


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

  • 5+ years in an engineering software development role building backend services and APIs having experience with SaaS, event driven, highly available, scalable, resilient systems delivering enterprise grade commercial cloud services. 

  • Strong problem solving skills, can-do attitude with the ability to analyze, troubleshoot, and solve a wide range of technical problems.

  • Experienced with agile-type rapid development, CI/CD.

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

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

  • Ruby (and Ruby on Rails) or other similar technologies and can learn it quickly.

  • Experienced with front-end technologies, should it be JavaScript or CSS.

  • Experience with databases (MySQL, MongoDB, Redis…), know their differences, and how they work.

  • Understand the *nix environment and associated concepts (socket blocking/non blocking, thread, process, fork…).

Nice to have: 

  • Experience with Contact Center solutions is a plus.

  • Experience with message bus and streaming technologies (Kafka, ActiveMQ). 

  • Experience building real-time/near real-time application is a plus.

  • Demonstrated experience deploying applications and API services of Enterprise grade that scale to thousands of users.

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