QA Engineer

Mid • Remote

13,000 - 16,000 PLN/mo

Warsaw, Poland

Salary range: 13,000–16,000 PLN (B2B)

Purpose of Role

We are looking for a Mid QA Engineer to join our QA team and support quality across data-driven and web applications. In this role, you will initially focus on database test analysis and development, working with tests written in Python and validating data using SQL. Over time, the role will also expand into web application testing, including Playwright/TypeScript automation and manual feature testing. This is a good fit for someone who enjoys technical QA work, understands testing fundamentals, is comfortable working with data, and can use AI tools effectively in day-to-day engineering tasks.

What you will be doing

Analysing, maintaining and extending automated database tests written in Python
Verifying data correctness using SQL and investigating data-related issues
Supporting test coverage for data processing and database-related logic
Creating and maintaining automated tests, initially focused on DB tests and later also E2E/UI tests
Performing manual feature, regression and UI testing for web applications
Supporting cross-browser and cross-application testing
Reporting, tracking and verifying bugs in Jira
Supporting releases, documentation and QA feedback loops
Collaborating closely with developers, QA engineers, product and data-focused teams
Using AI tools to support test analysis, test creation, debugging and day-to-day QA work

We are looking for

2+ years of experience in QA, including manual and/or automated testing
Experience with test automation
Good understanding of testing concepts, test design and defect reporting
Basic to intermediate Python skills, or willingness to work with Python-based test automation
Practical SQL knowledge and experience working with relational databases
Ability to analyse data, investigate inconsistencies and reason about expected results
Strong logical and analytical thinking skills
Experience with UI and/or web application testing
Strong communication and collaboration skills
English at B2 level or higher

It would be nice to have

Experience with Playwright and TypeScript
Experience with CI/CD and GitHub/GitLab pipelines
Experience with database testing or data quality testing
Experience working with cross-functional engineering teams
Experience testing AI-powered features or using AI tools in QA workflows
Basic understanding of cloud-based or containerised environments

Tech stack

You do not need to know all of these technologies from day one, but these are the tools and technologies you may work with:

Python
SQL
PostgreSQL, BigQuery
Playwright, TypeScript
JavaScript
React, Node.js, Express
Docker, Kubernetes, GCP

Benefits

95% remote work – the team meets in the Warsaw office once a month
Warsaw office in the Wola area
Kitchen and free coffee
Comprehensive private family healthcare package
Multisport Plus Card
Half-day Fridays

Opensignal

Opensignal is a leading global provider specializing in independent insights and data on network experience and market performance. The company adopts a user-centric approach to help communication providers enhance their networks and optimize commercial performance. Opensignal is highly regarded by analysts, investors, and financial institutions for its independent analysis, contributing regularly to industry reports. The company's mission is to advance connectivity for all, pioneering the industry by enabling operators to link network experience with market performance in unprecedented ways. With offices in London, Boston, and Victoria, British Columbia, Opensignal operates globally, employing a diverse workforce across four continents and representing over 25 nationalities. The company values diversity and inclusivity, striving to build an inclusive workforce as an equal opportunity employer.

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