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Offer summary
(Summary generated by AI based on the full job description)
The project focuses on digital fleet management platforms used across multiple countries with a focus on scalability and reliability. Key technologies include LoadRunner, Apache JMeter, Gatling and APM tools: Dynatrace, Elasticsearch. Responsibilities cover designing performance testing strategies, integration with CI/CD, defining performance criteria, test automation, and bottleneck analysis. Collaboration with product teams and SRE is a key aspect of the role.
from: 6 July 2026
to: 5 August 2026
salary not specifiedB2B contract (full-time)
salary not specifiedcontract of employment
Offer parameters
level:senior
working mode:hybrid • full office
Warszawa, Mokotów
Requirements
Expected technologies
LoadRunner
Apache JMeter
Gatling
Dynatrace
Elasticsearch
Optional technologies
Grafana
Prometheus
Our requirements
- Minimum 5 years of experience in performance engineering or testing
- Hands-on experience with performance testing tools such as LoadRunner, Apache JMeter, and Gatling
- Strong understanding of performance testing methodologies, workload modeling, and capacity planning
- Experience analyzing application logs, system metrics, and identifying performance bottlenecks
- Familiarity with application performance monitoring (APM) tools such as Dynatrace and Elasticsearch
- Experience integrating performance testing into CI/CD pipelines is a strong advantage
- Fluent Polish and English
Optional
- Familiarity with Grafana and Prometheus
Your responsibilities
- Designing and implementing performance testing strategies aligned with product architecture
- Integrating performance testing into CI/CD pipelines to enhance delivery efficiency
- Defining performance acceptance criteria and non-functional requirements (NFRs)
- Developing and maintaining automated load, stress, endurance, and scalability test scenarios
- Analyzing application and infrastructure behavior under load to identify performance bottlenecks
- Collaborating with engineering teams to improve system scalability, resilience, and overall performance
- Defining, measuring, and monitoring key performance indicators (KPIs), including latency, throughput, response times, and resource utilization
- Partnering with Operations and Site Reliability Engineering (SRE) teams to validate system stability and production readiness
- Developing reusable test assets, datasets, CI/CD pipelines, and automation templates
About the project
We are looking for an experienced Senior Performance Test Engineer to join a dynamic Agile team responsible for developing and supporting digital fleet management platforms used across multiple countries. In this role you will ensure the scalability, reliability, and efficiency of our digital platforms throughout the entire software delivery lifecycle. You will collaborate closely with Product Teams, Cloud Engineering, and QA communities to embed performance best practices into delivery teams and support the industrialization and standardization of performance testing across the organization. The role is based in Warsaw and offers a hybrid working model.
This is how we work on a project
- Continuous Deployment
- Continuous Integration
What we offer
- Great Place to Work since 2015 - it’s thanks to feedback from our workers that we get this special title and constantly implement new ideas
- Employment stability - revenue of PLN 2.1BN, no debts, since 2006 on the market
- We share the profit with Workers - over PLN 76M has already been allocated for this aim since 2022
- Attractive benefits package - private healthcare, benefits cafeteria platform, car discounts and more
- Comfortable workplace – class A offices or remote work
- Dozens of fascinating projects for prestigious brands from all over the world – you can change them thanks to Job Changer application
- PLN 1 000 000 per year for your ideas - with this amount, we support the passions and voluntary actions of our workers
- Investment in your growth – meetups, webinars, training platform and technology blog – you choose
- Fantastic atmosphere created by all Sii Power People
Recruitment stages
- 1.Send your CV
- 2.Talk to us about your expectations
- 3.Learn more about our projects and choose the best
- 4.Start your adventure with Sii!
Sii Sp. z o.o.
Sii is the leading technology consulting, digital transformation, engineering, and business services vendor in Poland. We already employ more than 7 300 professionals and implement projects in a variety of industries for clients from many countries around the world. The Great Place to Work title, won 10 times in a row, proves that at Sii, we create a friendly work environment.
Sii ensures that all employment-related decisions are made solely on the basis of qualifications and competencies. We are committed to equal treatment of all individuals, regardless of any protected characteristics, and promoting a diverse and inclusive work environment.
This is how we work
Senior Performance Test Engineer (f/m/x)
I apply to:
Sii Sp. z o.o.
Warszawa, Mokotów
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