Performance Tester (k6 + Gatling)
- Remote
- Wrocław
- Bielsko-Biała
- Senior 110 - 135 PLN/h + VAT B2B
Unfolding Your Next Role
We are looking for an experienced Performance Tester to join a team working on banking applications. The main responsibility will be designing and writing performance tests using k6, as well as executing performance testing of systems with k6 and supporting integration testing.
This is a time-based contract until the end of June 2026, with the possibility of extension.
Tech & Tool Stack
Testing Library
Your Daily Missions
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Designing and executing performance tests (load, stress, endurance) using k6 (current tests are written in Gatling; understanding of Gatling is a plus).
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Creating and maintaining test scripts in k6 (Gatling is welcome as an additional skill).
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Performing integration and manual testing of banking systems when needed.
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Analyzing test results and identifying performance bottlenecks.
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Collaborating with development and DevOps teams to optimize system performance.
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Preparing reports and presenting test results to stakeholders.
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Integrating performance tests into CI/CD pipelines.
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Supporting the team in resolving performance and integration issues.
The Essentials We’re Seeking
- Minimum 3 years of experience in performance testing.
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Hands-on experience with k6 for performance testing.
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Experience in integration testing.
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Knowledge of REST APIs and microservices architectures.
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Ability to analyze system metrics (CPU, memory, response times).
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Experience with monitoring tools (e.g. Grafana, Prometheus).
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English at minimum B2 level.
Nice-to-haves
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Knowledge of Gatling (additional advantage).
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Experience in the banking or FinTech sector.
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Familiarity with Continuous Delivery practices and Agile environments.
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Experience with Docker and/or Kubernetes.
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Knowledge of scripting languages (JavaScript, Python).
Practice Lead
Michał Gałczewski
The Quality Assurance Team brings together diverse skills and experience levels to enhance standards in software development. With a collaborative ethos, the team promotes knowledge sharing and mentorship. Upholding a ‘Support Over Blame’ philosophy, we value learning from mistakes and encourage open discussion. Emphasizing continuous learning, the QA Team stays updated on industry trends. Our team stands out with its tailored approach, ensuring adaptability, agility, and innovative client-centric solutions.
Our
Benefits
At CSHARK, it’s not about trendy perks or the latest gaming console in the lounge. Based on feedback from our team, what truly counts is an environment conducive to focused work, structured processes, and continuous skill development. We prioritize what genuinely enriches the daily work experience, ensuring that every moment spent with us is both productive and fulfilling.
100% remote work
Harness the power of technology with our remote-first approach. Work from the comfort of your space while staying connected and collaborative.
Flexible hours
Find your rhythm with hours that align to your lifestyle. We understand that productivity isn’t confined to the typical 9-to-5.
International projects
Engage in projects that transcend borders. Experience the thrill of working with diverse teams and clients from different parts of the world.Navigate the global tech landscape with ease. Enhance your communication skills with our tailored Business English sessions.
Business english lessons
Navigate the global tech landscape with ease. Enhance your communication skills with our tailored Business English sessions.
Participation in charity actions
Connect with the community and contribute to causes that matter. Join us in various charity initiatives and be a part of change that extends beyond business.
In-house technology workshops
Stay at the forefront of technology. Dive deep into topics, refine your skills, and learn from peers through our regular tech workshops.
100% remote work
Harness the power of technology with our remote-first approach. Work from the comfort of your space while staying connected and collaborative.
Flexible hours
Find your rhythm with hours that align to your lifestyle. We understand that productivity isn’t confined to the typical 9-to-5.
International projects
Engage in projects that transcend borders. Experience the thrill of working with diverse teams and clients from different parts of the world.Navigate the global tech landscape with ease. Enhance your communication skills with our tailored Business English sessions.
Business english lessons
Navigate the global tech landscape with ease. Enhance your communication skills with our tailored Business English sessions.
Participation in charity actions
Connect with the community and contribute to causes that matter. Join us in various charity initiatives and be a part of change that extends beyond business.
In-house technology workshops
Stay at the forefront of technology. Dive deep into topics, refine your skills, and learn from peers through our regular tech workshops.
Recruitment process
Chat with Our Recruiter
Kick off your CSHARK adventure with an initial interview. This is a great opportunity for us to get to know each other better and for you to ask any preliminary questions.
Show Your skills
Depending on the role, you’ll either engage in a technical interview or take on a specific task. This stage allows us to understand your expertise and offers you a glimpse into the challenges you might tackle at CSHARK
Meet the Team
This is where the magic happens. Engage with a potential supervisor, your future team, or even a client. It’s a deep dive into your prospective role and a chance to grasp the collaborative spirit of CSHARK.
Crafting Your Offer
Once we recognize the mutual fit, we’ll discuss the specifics of your offer. We believe in crafting a package that respects your skills, experience, and aspirations.
Onboarding Preparation
Once you’re set to join us, our team crafts a tailored onboarding plan. This includes setting up your tools and accounts, scheduling introductions to key team members, and organizing orientation sessions to make your integration seamless and efficient.
Chat with Our Recruiter
Kick off your CSHARK adventure with an initial interview. This is a great opportunity for us to get to know each other better and for you to ask any preliminary questions.
Show Your skills
Depending on the role, you’ll either engage in a technical interview or take on a specific task. This stage allows us to understand your expertise and offers you a glimpse into the challenges you might tackle at CSHARK
Meet the Team
This is where the magic happens. Engage with a potential supervisor, your future team, or even a client. It’s a deep dive into your prospective role and a chance to grasp the collaborative spirit of CSHARK.
Crafting Your Offer
Once we recognize the mutual fit, we’ll discuss the specifics of your offer. We believe in crafting a package that respects your skills, experience, and aspirations.
Onboarding Preparation
Once you’re set to join us, our team crafts a tailored onboarding plan. This includes setting up your tools and accounts, scheduling introductions to key team members, and organizing orientation sessions to make your integration seamless and efficient.
Chat with Our Recruiter
Kick off your CSHARK adventure with an initial interview. This is a great opportunity for us to get to know each other better and for you to ask any preliminary questions.
Show Your skills
Depending on the role, you’ll either engage in a technical interview or take on a specific task. This stage allows us to understand your expertise and offers you a glimpse into the challenges you might tackle at CSHARK
Meet the Team
This is where the magic happens. Engage with a potential supervisor, your future team, or even a client. It’s a deep dive into your prospective role and a chance to grasp the collaborative spirit of CSHARK.
Crafting Your Offer
Once we recognize the mutual fit, we’ll discuss the specifics of your offer. We believe in crafting a package that respects your skills, experience, and aspirations.
Onboarding Preparation
Once you’re set to join us, our team crafts a tailored onboarding plan. This includes setting up your tools and accounts, scheduling introductions to key team members, and organizing orientation sessions to make your integration seamless and efficient.
Explore the Heartbeat of CSHARK
Discover the essence of our guilds’ expertise, advanced tools and tech stack, and our real-world successes. Delve into impactful case studies and hear genuine insights from our team
Get to Know How We Work