Senior Test Engineer (E-commerce Platform)

Sigma Software; Województwo mazowieckie; On-site; PLN 120,000 - 180,000; Full time

Job summary

Sigma Software invites a Senior Test Engineer to join our Mobile & Web Solutions team and shape the quality of a social shopping platform used by millions of fashion lovers worldwide. You will drive testing across Web and Mobile, ensuring top user experience through rigorous QA practices.

Join a collaborative environment that values initiative, continuous learning, and strong communication. You will design test strategies, execute manual and automated tests, and work closely with product owners,

Qualifications

• 4.5+ years of QA experience with end-to-end ownership of testing processes.
• Strong exploratory testing skills beyond scripted test cases.
• Experience testing mobile apps (iOS and Android), including release processes.
• Ability to work autonomously across multiple cross-functional teams.
• Familiarity with agile workflows, feature flags, and staged rollouts.
• Strong requirements analysis skills, able to clarify edge/corner scenarios.
• Comfortable with context switching and supporting multiple teams in parallel.
• SQL — ability to write moderately complex queries.
• API Testing — hands-on experience with REST APIs using tools like Postman.
• Solid understanding of HTML, CSS, cookies, caching, browser behavior.
• Experience deploying builds via Android Studio, Xcode, or similar tools.
• Git — practical experience with branches, commits, code reviews, pull/merge requests.
• Upper-Intermediate+ English proficiency.

Responsibilities

• Work as part of the product development team, collaborating closely with customer-side developers.
• Follow and support the Quality Assistance process.
• Plan and estimate testing activities.
• Create and maintain test documentation.
• Design and execute manual, snapshot, and UI tests for new features.
• Perform Functional, Regression, and Compatibility testing across Web and Mobile platforms.
• Conduct release validation, smoke testing, and post-deployment quality checks.
• Provide clear and regular status and progress reports.
• Collaborate with product owners, business analysts, and development teams to ensure product quality.
• Identify, document, and communicate risks and issues constructively.

Skills

Exploratory testing

Autonomous work

Requirements analysis

Agile workflows

Edge-case testing

Context switching

SQL

API testing

HTML/CSS knowledge

Git

English proficiency

Tools

Postman

Android Studio

Xcode

Job description

Join Sigma Software as a Senior Test Engineer and help shape the quality of a cutting-edge social shopping platform that blends e-commerce with social networking. This role offers the opportunity to work on a high-impact product used by millions of fashion lovers worldwide.

You will be part of our Mobile & Web Solutions department, collaborating with talented professionals and applying the Quality Assistance model to ensure exceptional user experiences.

We at Sigma Software value innovation, teamwork, and professional growth. By joining us, you will gain access to diverse projects, supportive colleagues, and a culture that rewards initiative and expertise.

CUSTOMER
Global marketplace for fashion, combining e-commerce with social networking features. It enables users to sell customized or rare clothes and accessories, promoting sustainable consumption by recycling unwanted items for money.

PROJECT
The project is a social shopping platform where users create profile pages to post pictures and descriptions of items for sale, enhanced with hashtags for easier discovery. Focused on clothes retail, it aims to deliver an evocative buying and selling experience. Key tasks include payment system integration and accessibility feature implementation.

• Work as part of the product development team, collaborating closely with customer-side developers
• Follow and support the Quality Assistance process
• Plan and estimate testing activities
• Create and maintain test documentation
• Design and execute manual, snapshot, and UI tests for new features
• Perform Functional, Regression, and Compatibility testing across Web and Mobile platforms
• Conduct release validation, smoke testing, and post-deployment quality checks
• Provide clear and regular status and progress reports
• Collaborate with product owners, business analysts, and development teams to ensure product quality
• Identify, document, and communicate risks and issues constructively

• 4,5+ years of QA experience with end-to-end ownership of testing processes
• Strong exploratory testing skills beyond scripted test cases
• Experience testing mobile apps (iOS and Android), including release processes
• Ability to work autonomously across multiple cross-functional teams
• Familiarity with agile workflows, feature flags, and staged rollouts
• Strong requirements analysis skills, able to clarify edge/corner scenarios
• Comfortable with context switching and supporting multiple teams in parallel
• SQL — ability to write moderately complex queries
• API Testing — hands-on experience with REST APIs using tools like Postman
• Solid understanding of HTML, CSS, cookies, caching, browser behavior
• Experience deploying builds via Android Studio, Xcode, or similar tools
• Git — practical experience with branches, commits, code reviews, pull/merge requests
• Upper-Intermediate+ English proficiency