API & Data Tester (QA)
We’re looking for an API & Data Tester who enjoys working with data, APIs, and automation and wants to grow in the world of modern data platforms.
We’re looking for an API & Data Tester who enjoys working with data, APIs, and automation and wants to grow in the world of modern data platforms. This is a full-time hybrid role based in Prague, with flexibility to work partly remote.
You’ll be part of a tight-knit team working on projects where data quality really matters — from APIs and data pipelines to BI dashboards and reports. projects.
What You’ll Be Doing
- Testing and automating APIs using Postman or Bruno (collections, variables, scripts, CI/CD runs)
- Working closely with developers and data engineers on integrations and data flows
- Using Git to version and manage test cases
- Checking data quality and consistency using SQL
- Testing BI projects, data models, and dashboards
- Finding bugs, investigating root causes, and helping the team fix them
- Improving how we test data and APIs as we grow
- (Nice to have) Playing with CAT for automated data testing
Who We’re Looking For
- You have some experience with API testing (Postman or similar tools)
- You understand basic SQL and enjoy working with data
- You know the basics of Git and version control
- You can talk to developers and data people without fear 😄
- You’re curious, detail-oriented, and like learning new things
- You don’t need to know everything — we value attitude and growth mindset
Why You’ll Like It Here
- Hybrid work setup — home office + Prague office
- Work on real products and real data used by thousands (sometimes millions) of users
- Projects for a mix of sast-growing local brands and global clients
- You’ll test APIs and data pipelines behind e-commerce platforms, CRM systems, marketing automation, and BI reporting
- Modern tools, modern stack — no legacy-for-the-sake-of-legacy
- Small team and friendly atmosphere
- Direct communication — your ideas influence how things are done
- Plenty of room to grow — from API testing to advanced data workflows and automation
Sounds Like You?
Let us know! Send us a message or your CV, and we’ll happily tell you more about the team, the projects, and what you can grow into.
About us
Cross Masters is a great place to start and develop your career. We are a growing, dynamic company and every success is rewarded. We are experts in Marketing and Advertising technology consultancy. Every project we execute starts with building a global perspective on our client needs. We specialize in developing innovative data-driven solutions to power (not only) digital marketing.
Our office culture is casual and social, with an emphasis on education and innovation. We have the freedom to try new ideas, experiment and are expected to be constantly learning and growing.
Read more about us and our approach here.
Benefits & perks
Learn and Grow
Support for both in-house and external training for your professional development. Mentorship from experienced colleagues is a matter of course.
Lead
We pride ourselves for being autonomous. You will be given responsibility early to fulfill your potential.
Flexible Working Style
Take advantage of flexible working hours. Home office by prior agreement.
The setup and environment you need
Everything need to be successful in your endeavors. Hardware, software, unlimited coffee, tea, soft drinks, fruit... All of that in the most innovative building in Prague.
International clients - International team
We are building a diverse international team to work with large international companies.
Boredom? Banished
This is not for someone who likes every day to be the same. You will be on the cutting edge of our field. Your job will never be boring.