Job
- Level
- Senior
- Location
- Vienna
- Working Model
- Hybrid, Onsite
- Job Field
- Back End, Test/QA
- Employment Type
- Full Time
- Contract Type
- Freelancer
Job Summary
In this role, you will test mission-critical backend systems and develop automation frameworks for APIs and microservices to ensure the highest software quality and security.
Job Technologies
Your role in the team
- Testing software is great, but testing mission-critical backends with a purpose is even better! As a Senior Backend QA Engineer - Freelancer, you'll work on architecture that powers life-changing products helping people manage the most precious thing they have: their health. Collaborating daily with developers, data engineers, and product teams across a global setup, you will experience best-in-class software practices and ensure our platforms meet the highest standards of reliability and security.
- We are looking for an experienced Senior Backend QA Engineer to strengthen our core capabilities in API testing, microservices automation, and internal tooling. As an entrepreneurial engineer, you will support our mission to improve people's health and well-being by keeping our data pipelines, server-side applications, and integration layers rock-solid. You will work across global teams in India, Austria, and Spain, testing distributed systems integrated into a modern CI/CD pipeline based on Java and cloud-native backend technologies.
- Design, build, and maintain robust automation frameworks for REST APIs, microservices, and asynchronous message queues.
- Leverage modern AI tools and LLMs to generate synthetic test data, optimize test coverage, and automate test case creation for complex backend logic.
- Utilize deep analytical and debugging skills to isolate, reproduce, and resolve complex distributed system issues.
- Drive backend testing excellence by establishing key quality metrics (speed, reliability, test coverage) and streamlining CI/CD testing gates.
- Partner with backend engineers, data teams, and product owners to define clear acceptance criteria and secure end-to-end data flows.
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Our expectations of you
Education
- Bachelor's or Master's Degree in Computer Science, Computer Engineering, or equivalent experience with 6-9 years in software QA, specializing in backend systems and distributed services.
Qualifications
- Advanced proficiency in SQL queries, data validation, database schemas (PostgreSQL) and testing complex data pipelines.
- Proven track record conducting performance and stress testing on backend services using tools like JMeter, Grafana k6, or Gatling.
- Strong familiarity with Git/GitHub, CI/CD execution (Jenkins, GitHub Actions, or GitLab CI), and workflow tools (Jira, Confluence).
- Strong communication skills and professional working proficiency in English.
Experience
- Deep hands-on experience in API test development and framework design (e.g., RestAssured, TestNG, JUnit) and proficiency in Java. Strong experience with Postman and API specification standards (OpenAPI/Swagger).
- Practical experience leveraging AI-powered dev/test tools (e.g., GitHub Copilot, ChatGPT) to accelerate script generation, generate edge-case test data, and optimize backend test suites.
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What we offer
- Ambitious and passionate teammates building meaningful, life-changing products.
- An innovative, agile working environment allowing for collaboration with really smart people working in cross-functional teams.
- We welcome technical evangelists, so if you are interested in any thought leadership contributions (blogs, conferences, publications, etc…) within the realm of the organization, we are happy to support you.
- Access to modern AI tooling and support to apply it responsibly in daily work, without compromising quality or safety.
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Benefits
Higher Take-Home Pay
Health, Fitness & Fun
Work-Life-Integration
Topics You Will Work On
Job Locations
About Your Employer
mySugr GmbH
Wien
We provide an app-based diabetes care solution to minimize the daily challenges and problems that come with managing this condition. Our products are tailored to work together in a package that makes everyday diabetes management easier. mySugr is designed by people living with diabetes, for people living with diabetes.
Description
- Founding Year
- 2012
- Language
- English
- Company Type
- Startup
- Working Model
- Hybrid, Onsite
- Industry
- Internet, IT, Telecommunication
Senior Backend QA Engineer - Freelancer
- Location
- Vienna
- Working Model
- Hybrid, Onsite
- Diversity
- Open for all genders
- English Only
- English only required
