Logo-of-Kraz-hiring-for-jobs-in-Poland-on-GrabJobs

Senior QA Backend Engineer

Job Description - Senior QA Backend Engineer




We are looking for an experienced Senior QA Backend Engineer with a strong focus on backend testing and distributed systems. You will be responsible for ensuring the quality of complex applications built on a microservices architecture by planning, executing, and evaluating various testing activities. The ideal candidate is a proactive team player with excellent analytical and communication skills who enjoys collaborating across multiple development teams.



 



Responsibilities:



  • Plan and execute integration, system and usability testing

  • Taking part of E2E and UAT testing

  • Validate complex backend flows across multiple microservices and integrations

  • Work with the developers to understand the critical paths and ensure product stability

  • Build better cooperation with other Dev Teams

  • Collaborate closely with cross-functional and cross-team stakeholders to improve overall product quality






Requirements







  • At least 5+ years of experience as software tester

  • Highly motivated team player with strong communication skills

  • Working experience in planning, analysis, execution and evaluation of tests

  • Working experience and knowledge of common test design techniques

  • Strong test analytics skills

  • Understanding of mobile and web-based applications

  • Strong backend-focused testing experience

  • Experience testing microservice-based architectures across multiple services

  • Understanding of asynchronous and event-driven systems

  • Experience with AWS SNS/SQS based integrations and messaging flows

  • Understanding of software development lifecycle

  • Knowledge of defect management tools like: Jira, YouTrack etc.

  • Knowledge of test management tools like: TestRail, Xray etc.

  • Experience of API testing tools: Postman, Swagger etc.

  • Experience with SQL databases

  • Ability to analyze logs, trace requests and validate data flow across services

  • Experience in Agile

  • Testing in projects

  • Strong cross-team collaboration and communication skills while working with multiple development teams



Nice to have:



  • Experience with test automation for web and mobile applications.

  • Knowledge of REST API standards, HTTP protocols, and API contract validation.

  • Experience in payment cards, card management, or payment processing domains.

  • ISTQB Foundation Level and/or ISTQB Advanced Test Analyst certification.










Benefits



  • B2B contract

  • Hybrid work (Office Thu + PI Planning onsite)

  • Engagement in technically challenging projects with a mature engineering culture.

  • Long-term cooperation on an exciting international project.

  • Opportunity to influence testing strategy, quality standards.







Original job Senior QA Backend Engineer posted on GrabJobs ©. To flag any issues with this job please use the Report Job button on GrabJobs.
Share Job
Share Job

Similar Senior QA Backend Engineer Jobs in Poland

GrabJobs is the no1 job portal in Poland, connecting you to thousands of jobs fast! Find the best jobs in Poland, apply in 1 click and get a job today!

Mobile Apps

Copyright © 2026 Grabjobs Pte.Ltd. All Rights Reserved.