QA Performance Engineer (IoT sphere)

Technologies we use

Expected

• Java
• Grafana
• Git
• Linux
• AWS

Optional

• Jenkins
• GitHub Actions

Operating system

• Linux

About the project

The project focuses on performance testing of the middleware service layer powering the client’s connected device platform. The QA Automation Engineer will contribute to a JMeter-based performance testing framework, execute and report performance tests, maintain and enhance the framework, and work closely with DevOps Engineers, Developers, and senior performance engineers to ensure backend, API, and microservices performance meets high reliability standards.

Technologies:

JMeter

Java basics

REST APIs / HTTP

Git

This is how we organize our work

This is how we work

• at the client's site
• you focus on a single project at a time
• you can change the project
• you have influence on the technological solutions applied
• you focus on product development
• agile
• scrum

Your responsibilities

• Execute performance, load, stress, and soak tests for backend services, REST APIs, and microservices using JMeter;
• Develop and maintain JMeter test scripts under the guidance of senior performance engineers;
• Contribute to the performance testing framework by adding new scenarios, reusable components, and test data sets;
• Analyze test results, prepare reports, and help identify performance bottlenecks together with Developers and DevOps Engineers;
• Use observability tools such as Grafana and Datadog to review dashboards and logs and support root cause analysis;
• Document test plans, scenarios, execution results, and findings in a clear and reproducible way;
• Collaborate with Developers, DevOps Engineers, and QA peers to ensure performance criteria are met before release;
• Participate in Agile ceremonies, including planning, refinement, retrospectives, and daily team communication;
• Continuously improve skills in performance engineering, JMeter, and cloud-based system performance through self-learning, training, and knowledge sharing;

Our requirements

• 1+ year of experience in QA, manual or automation;
• Basic understanding of performance testing concepts, including common test types and key metrics;
• Hands-on exposure to JMeter, including basic test plan structure, script recording, parameterization, and assertions;
• Understanding of REST APIs and HTTP basics, including methods, status codes, headers, and JSON payloads;
• Basic knowledge of Java and object-oriented programming;
• Ability to read and interpret graphs, dashboards, and basic system metrics;
• Strong analytical thinking, attention to detail, and problem-solving skills;
• Good communication skills and ability to work in a team;
• Familiarity with Agile/Scrum software development process;
• English level: B2 or higher.

Optional

• Basic Linux command-line skills;
• Basic understanding of cloud platforms such as AWS, Azure, or GCP;
• Exposure to observability or APM tools such as Grafana, Datadog, or CloudWatch;
• Understanding of microservices architecture;
• Familiarity with CI/CD pipelines such as Azure DevOps, GitHub Actions, or Jenkins;
• Familiarity with home automation technologies or IoT.

What we offer

• Resources and opportunities for self-education in technical and non-technical areas;
• Access to internal conferences and meetups for knowledge sharing and learning from industry experts;
• Medical insurance;
• Sports activities to promote a healthy lifestyle;
• Flexible work options, including remote and hybrid opportunities;
• Referral program for bringing in new talent.

This is how we work on a project

• TDD
• Continuous Deployment
• Continuous Integration
• DevOps
• documentation
• issue tracking tools
• integration tests
• performance tests
• test automation
• testing environments
• unit tests

Development opportunities we offer

• space for experimenting
• substantive support from technological leaders
• technical knowledge exchange within the company

COHERENT SOLUTIONS sp. z o.o.

Coherent Solutions is a digital product engineering company focused on empowering business success. Our global team of 2000 talented professionals collaborates seamlessly to deliver innovative solutions that drive measurable business impact. Headquartered in Minneapolis, USA, the company’s core competencies across 10 locations worldwide include software product development, IT consulting, data and analytics, machine learning, mobile app development, DevOps, Salesforce, and more.

We grow a team of advisors, not just order takers, and strive to make the company a place for career growth and opportunities. If you want to grow your core competencies, share your passion, and be sure every contribution is evaluated, we are on the same page.

This is how we work