Senior QA Engineer (m/f/d)
IT / Essen Headoffice / Hybrid / Vollzeit / iSE02655
Welcome to ista
At ista, we support property owners and managers in making their buildings fit for the future and kind to the planet. That includes tracking and billing energy consumption in a way that’s easy to grasp, to help save energy and cut CO2 emissions. With over 6,300 employees in 20 countries, we’re committed to making it happen. Join us and help shape tomorrow, secure in the knowledge that you’re part of a successful company that also offers you the flexibility of agile working practices.
Here's what you can look forward to
-
Design, build, and maintain end-to-end and integration test automation (Playwright or equivalent) that teams can trust every day
-
Make automation fast and stable: reduce flaky tests, improve determinism, and optimize execution time to deliver quick feedback in CI
-
Increase test coverage with focus on risk and value—prioritize the scenarios that protect customers and the business most
-
Integrate and operate test suites in CI/CD pipelines, including reporting, test environments, test data, and clear failure diagnostics
-
Work shift-left with engineering and product: bring quality into discovery, refinement, and design discussions before code is written
-
Drive testability and strong acceptance criteria by challenging unclear requirements and aligning on “done” in a measurable way
-
Enable developers to test effectively by supporting unit/integration/E2E testing patterns, examples, and reusable building blocks
-
Act as a quality partner, not a gatekeeper: unblock teams, make trade-offs explicit, and help ship confidently and frequently
-
Coach and mentor developers and QA engineers on modern testing strategies, tooling, and pragmatic best practices.
-
Track and improve quality outcomes using meaningful metrics (defect trends, flake rate, time-to-feedback, automation effectiveness) and turn insights into action
What we require of you
-
5+ years of hands-on experience in software quality engineering and/or test automation in real-world product teams
-
Strong practical expertise with Playwright (or similar, e.g., Cypress/WebdriverIO) including stable locator strategies, fixtures, and debugging
-
Solid understanding of modern web architectures (frontend frameworks, APIs, async behavior, authentication flows, microservices interactions)
-
Deep knowledge of testing strategies (test pyramid, risk-based testing, exploratory thinking, coverage that actually adds confidence)
-
Proven experience integrating automation into CI/CD, including pipeline design, parallelization, flaky test handling, and actionable reporting
-
Experience in Agile/DevOps environments, comfortable working in short cycles with continuous delivery and shared responsibility
-
Strong collaboration skills—you can influence developers and teams without formal authority and communicate clearly with stakeholders
-
Coaching mindset: you enjoy enabling others, raising standards, and creating shared ownership of quality across the team
-
Analytical and pragmatic approach to finding bottlenecks, diagnosing quality risks, and improving processes step by step
-
Fluent in English and German, able to communicate confidently in both languages in daily work
What we offer you
- Do the right thing with purpose and a future: our services save CO2 and protect the environment - we are working for a sustainable world of tomorrow
- Enjoy many benefits: Look forward to an attractive salary, 30 days' vacation per year and flexible working hours, including the opportunity to work up to 50% of the week on a mobile basis
- Secure good prospects for yourself: We are an internationally successful company with agile working methods and an open corporate culture. Our future course offers you long-term and excellent career options.
- Stay curious and develop yourself further: standing still is not an option for us, which is why we support you in every aspect of your development - a variety of learning opportunities await you
- Experience a working environment full of trust: We all pull together
- Have fun in a motivated team: Whether it's a barbecue event, international soccer cup or ice cream for everyone in summer - we always come up with something new, so stay tuned!