People Matter

Performance Engineer



Software Engineering
Posted on Thursday, April 18, 2024

Say hello to possibilities.

It’s not every day that you consider starting a new career. We’re happy that someone as talented as you is considering this role. RingCentral is a $2 billion global leader in cloud-based communications and collaboration software. We are fundamentally changing the nature of human interaction—giving people the freedom to connect powerfully and personally from anywhere, at any time, on any device.

Collaboration tool backend team is creating a backend for corporate messenger that helps companies to have an instrument for communication - send messages, files, photos, videos, using tasks, bots, common calendars, etc. This is highly available with a 99,999% availability system that has distributed and complex architecture including such technologies as MongoDB, Redis, Kafka, ElastiCache, Java, Golang and NodeJS components. The infrastructure is run mostly in k8s/docker. We use Kibana, ELK stack for logs, Grafana for metrics. Services are deployed in AWS cloud.

We are looking for an experienced Performance Engineer to contribute in performance testing and enhancements. Our technology stack is: Java, Python, MongoDB, Docker/Kubernetes, ELK, Kibana/Grafana, AWS Cloud, GitlabCI, ArgoWF. For performance tests we are using Gatling and in-house Java-based framework.


  • Being a part of corporate messenger development team, particularly in performance team

  • Communicate with distributed team members from different locations, like Spain, Bulgaria, Georgia, USA

  • Creating performance profiles

  • Running and creating performance tests using Gatling

  • Analyzing of performance results, investigation performance issues

  • Working with REST API services

  • Working with GitlabCI pipelines

  • Developing and running ArgoWF pipelines, working with k8s

  • Developing scripts and test cases using Python, Scala, bash, etc.


  • At least 1 year experience in performance testing

  • Experience in coding/automation on any OOP language from 2 years

  • Base knowledge of TCP/IP, HTTP, WS protocols

  • Understanding of REST API concept, experience in testing with API services

  • Experience with UNIX

  • Base knowledge and understanding of SQL/NoSQL DB

  • Analytical mindset

  • Spoken english B2+


  • Experience in testing HA and HighLoad systems

  • Experience with MongoDB/Redis.

  • Experience with tools like JMeter/Gatling

  • Experience in developing performance frameworks

What we offer:

  • Well-coordinated professional team.
  • Cutting edge technologies, interesting and challenging tasks, dynamic projects, 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.

About RingCentral

RingCentral, Inc. (NYSE: RNG) is a leading provider of business cloud communications and contact center solutions based on its powerful Message Video Phone™ (MVP™) global platform. More flexible and cost effective than legacy on-premises PBX and video conferencing systems that it replaces, RingCentral® empowers modern mobile and distributed workforces to communicate, collaborate, and connect via any mode, any device, and any location. RingCentral is headquartered in Belmont, California, and has offices around the world.

RingCentral is an equal opportunity employer that truly values diversity. We do not discriminate on the basis of race, religion, color, national origin, gender, sexual orientation, age, marital status, veteran status, or disability status.