QA Performance Engineer (IoT sphere)

Coherent Solutions; Polska; Hybrid; PLN 120,000 - 180,000; Full time

Benefits offered by this job

Medical insurance

Sports activities

Flexible work options (remote & hybrid

Referral program

Job summary

Coherent Solutions is seeking a QA Automation Engineer to join our performance testing initiative for a middleware service layer powering a connected device platform. You will work within a team to execute, script, and maintain tests using JMeter, focusing on backend services, REST APIs, and microservices.

Join a flexible, remote-friendly environment with opportunities to grow skills in performance engineering, observability tools, and cloud-based performance.

Qualifications

• 1+ year of QA experience, manual or automated.
• Understanding of performance testing concepts and metrics.
• Proficiency with JMeter and test plan scripting.
• Experience with REST APIs and HTTP basics; JSON payloads.
• English level B2 or higher.

Responsibilities

• Execute performance, load, stress, and soak tests for backend services with JMeter.
• Develop and maintain JMeter test scripts under guidance.
• Contribute to the testing framework with new scenarios and reusable components.
• Analyze results, prepare reports, identify bottlenecks with DevOps and developers.
• Use Grafana and Datadog to review dashboards and logs for root cause analysis.
• Document test plans, scenarios, results, and findings clearly.
• Collaborate with Developers, DevOps, and QA to ensure performance criteria met before release.
• Participate in Agile ceremonies and daily team communication.
• Continuously improve skills in performance engineering and cloud-based performance.

Skills

JMeter

REST APIs / HTTP

Git

Java basics

English (B2)

Analytical thinking

Team collaboration

Tools

Grafana

Datadog

Azure DevOps

GitHub Actions

Jenkins

Job description

Coherent Solutions is a digital product engineering company focused on empowering business success. Our global team of 1700+ talented professionals collaborate seamlessly to deliver innovative solutions that drive measurable business impact. Headquartered in Minneapolis, USA, the company’s core competencies across 10 locations worldwide include product software 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 that every contribution is evaluated, we are on the same page.

Company Background

Our client is a global leader in access solutions and smart home technologies. With over a decade of innovation in the IoT space, the company is a pioneer in connected home solutions, including garage door openers, gate systems, and smart access management tools. One of their flagship innovations is the platform, which allows users to control and monitor their home access systems through connected devices. The current focus is a mobile app designed to support and manage gated communities.

Project Description

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
• REST APIs / HTTP
• Git

What You'll Do

• 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;

Job 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.

Nice to Have

• 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 Do 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.

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