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Test Automation Engineer C#
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Offer summary

(Summary generated by AI based on the full job description)

The project focuses on a checkout platform for European merchants with a strong emphasis on test automation in .NET running in the Azure environment. Key technologies include C#, xUnit/NUnit, SpecFlow, Playwright, K6 for performance testing, and BDD (Cucumber + Groovy) with CI/CD in Azure DevOps. Responsibilities cover creating and maintaining unit, API, end-to-end, and performance tests, managing BDD tests, supporting juniors, and risk analysis in payment systems. Offered benefits include a 550 PLN benefits budget, private healthcare, and subsidies for language courses and professional training.

Test Automation Engineer C#

Company: Reply Polska Sp. z o.o.

from: 1 June 2026
to: 1 July 2026
120 - 160 złnet (+ VAT)/ hr.B2B contract (full-time)
12 000 - 16 000 złgross/ mth.contract of employment
Offer parameters
level:mid
working mode:hybrid
Katowice, Silesian
Katowice, SilesianWrocławska 54View on map

Requirements

Expected technologies

C#

Our requirements

  • Computer Science degree or equivalent experience and at least 3 years in QA automation with a production track record
  • Hands-on with the .NET test ecosystem (xUnit / NUnit, SpecFlow or Reqnroll, Playwright or Selenium, RestSharp / WireMock.Net)
  • Good C#
  • Experience with Cucumber and comfort with Groovy step definitions (or honest willingness to ramp up — we have an existing BDD suite)
  • API testing (REST, async / event-driven) and performance testing with K6 (or strong JMeter / Gatling / Locust and willingness to move to K6)
  • Azure as a daily environment: Azure DevOps or GitHub Actions, App Service / AKS / Functions, Application Insights as a real source of insight when things break
  • CI/CD, Git, Docker, Agile + Jira / Azure Boards; English at a comfortable working level
  • Fluency in Polish and very good communication in English
  • Availability to work in a remote/hybrid mode. Remote workers, we invite to the office once every month

Optional

  • Prior exposure to payments / fintech (PCI-DSS, 3-D Secure, PSD2/SCA, tokenization)
  • Security testing basics (OWASP Top 10, API Top 10)
  • Chaos / resilience testing or contract testing (Pact)
  • IaC (Bicep / Terraform)

Your responsibilities

  • Shape how we test a .NET product that lives entirely in Azure — from unit tests through API, end-to-end and performance
  • Write and maintain test suites in C# / .NET that run reliably in our Azure pipelines
  • Look after our BDD layer (Cucumber + Groovy) — keep scenarios readable for product and reliable in CI
  • Own performance and load testing in K6: realistic traffic models, regression runs, feedback to devs and architects
  • Cover the typical failure modes of a payment system — timeouts, retries, idempotency, partial failures
  • Support junior testers, raise the quality bar on test code, and lead grown-up conversations about risk — in payments a "low priority bug" can still mean lost revenue or a compliance problem
Company

About the project

We're looking for a Mid / Mid+ Automation Engineer to join the team building a checkout platform for merchants across Europe. Every release touches real money, so test automation isn't an add-on — it's how the team decides whether we ship.

Development opportunities we offer

  • development budget
  • external training
  • intracompany training

What we offer

  • Motivizer Benefits Platform to choose and manage all your benefits in one place. You receive a budget (550 PLN monthly). You can choose medical care package, meal tickets, sports cards (we have Multisport and on preferential terms, we have membership cards to one of the most popular Gyms), cinema tickets, shop vouchers, discounts and many more.
  • Language Courses – you'll have access to a multi-language learning platform enabling you to practice you language skills and learn new ones!
  • Regular and systematic further training opportunities - both internally and from external providers. We support your ongoing learning and development.
  • Cooperation within an internal community is our everyday reality. We have networking events, coding challenges, and company parties for different occasions.

Benefits

  • private medical care
  • sharing the costs of foreign language classes
  • sharing the costs of professional training & courses
  • integration events
  • extra social benefits

Recruitment stages

  • 1.
    Tech interview
  • 2.
    HR interview

Reply Polska Sp. z o.o.

Nexi is Europe's PayTech company operating in high-growth, attractive European markets and technologically advanced countries. Listed on Borsa Italiana's MTA, Nexi has the scale, geographic reach and abilities to drive the transition to a cashless Europe. With its portfolio of innovative products, e-commerce expertise and industry-specific solutions, Nexi provides flexible support for the digital economy and the entire payment ecosystem globally, across a broad range of different payment channels and methods. Nexi’s technological platform and the best-in-class professional skills in the sector lets the company operate at its best in three market segments: Merchant Services & Solutions, Cards & Digital Payments and Digital Banking & Corporate Solutions. Nexi constantly invests in technology and innovation, focusing on two fundamental principles: meeting, together with its partner banks, customer needs and creating new business opportunities for them. Nexi is committed to supporting people and businesses of all sizes, transforming the way people pay and businesses accept payments. It offers companies the most innovative and reliable solutions to better serve their customers and expand. By simplifying payments and enabling people and businesses to build closer relationships and grow together, Nexi promotes progress to benefit everyone.

This is how we work

Test Automation Engineer C#
12k–16k zł / mth. (CoE), 120–160 zł / hr. (B2B)
I apply to:
Reply Polska Sp. z o.o.
Katowice, Silesian
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