Senior performance QA engineer

Technology Stack:

Java, Python, MongoDB, Docker/Kubernetes, ELK, Kibana/Grafana, AWS Cloud, GitlabCI, ArgoWF, Gatling



Senior performance QA engineer

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

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.

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.

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