Casumo is an equal opportunity employer. We celebrate diversity and are committed to creating an inclusive environment for all employees.

Join us at Casumo, where you are invited to be your authentic YOU-MO!

Company Overview:
Welcome to Casumo, your passport to a world of fun, excitement, and responsible gaming. We're an international online casino company with a knack for creating unforgettable gaming experiences. Our secret sauce? A blend of innovation, security, and a dash of playful charm.
Nowadays, we're on the hunt for a Quality Assurance Specialist to join our team!

Position Overview:
At Casumo, we’re passionate about creating exceptional player experiences through innovation, collaboration, and data-driven decision making. We’re now looking for a Quality Assurance Specialist to join our growing Data Team and help ensure the quality, reliability, and performance of our data solutions.

In this role, you’ll work closely with Data Engineers, Analysts, and Business stakeholders to test and validate data platforms, pipelines, and reporting solutions. You’ll play a key role in embedding quality throughout the development lifecycle while driving automation and continuous improvement across our data ecosystem.

Responsibilities:

Testing Strategy & Quality Assurance

Create comprehensive test strategies and plans for new data solutions, covering both functional and non-functional testing.
Define testing objectives, scope, KPIs, and quality standards for data reliability and system performance.
Identify risks and ensure thorough test coverage across all data-related features and workflows.
Develop detailed test cases and scenarios based on business requirements and technical specifications.

Functional & Non-Functional Testing

Conduct functional testing to validate business logic, use cases, and expected system behaviour.
Perform non-functional testing, including performance, scalability, security, and usability testing.
Test ETL pipelines, data warehouses, data lakes, BI tools, and reporting solutions to ensure data integrity, completeness, and accuracy.
Execute manual and automated test cases, documenting results and tracking defects through to resolution.

User Acceptance Testing (UAT)

Partner with business stakeholders to coordinate and support UAT activities.
Collaborate with Business Analysts and Data Analysts to gather feedback and prioritise defect resolution.
Ensure business-critical data flows and reports are fully validated before production deployment.
Maintain clear documentation of UAT processes, results, and required improvements.

Test Automation & Continuous Improvement

Develop and maintain automated test scripts to improve testing efficiency and repeatability.
Automate regression testing to ensure system changes do not introduce new defects.
Continuously improve automation frameworks, tools, and QA practices within an Agile/SCRUM environment.
Monitor automated test execution and collaborate with engineers to resolve identified issues.

Collaboration & Documentation

Work closely with cross-functional teams to integrate testing seamlessly into the development lifecycle.
Align testing priorities with business needs and release timelines.
Contribute ideas and recommendations to improve QA processes and promote a strong culture of quality across the Data Team.
Maintain clear and concise documentation for test plans, scripts, cases, defects, and results.

Requirements:

3+ years of experience in software testing, ideally within data-driven or analytics-focused environments.
Strong understanding of both functional and non-functional testing methodologies.
Experience testing ETL pipelines, data warehouses, data lakes, and BI/reporting platforms.
Solid SQL and data querying skills, with the ability to validate data quality, integrity, and accuracy.
Familiarity with Agile/SCRUM methodologies and CI/CD practices.
Experience with test automation tools and frameworks such as Selenium, JUnit, TestNG, or similar.
Proficiency in scripting or programming languages such as Python, Java, or JavaScript.
Familiarity with tools such as JIRA, Jenkins, and Git.
Strong analytical and problem-solving skills with excellent attention to detail.
Effective communication and collaboration skills, with the ability to work across technical and non-technical teams.
Excellent organisational and documentation skills.
A proactive mindset with a passion for continuous learning and improvement.

Nice to have

Bachelor’s degree in Computer Science, Information Systems, Data Engineering, or a related field.
Experience testing cloud-based data platforms on AWS, Google Cloud, or Azure.
Knowledge of modern data architectures and data processing technologies.

Please note: As Casumo is an international company and English is our working language, we kindly ask you to submit your CV in English.

The Perks:

Being a part of the Casumo group provides an unparalleled experience. You’ll find yourself surrounded by the brightest minds within the most inspiring and collaborative office spaces! In addition to that, you’ll enjoy:

Our Zagreb Office

Private health insurance
Wellness incentives, including a fitness allowance and mental well-being services
2 weeks Work From Anywhere (10 days), increased to 4 weeks (20 days) after longer duration of employment within the Company: explore the world while working remotely
Food allowance
Access to some of the greatest tools and platforms for developing your professional skills and building success within your role
A range of training courses, known as Casumo College, for continuous learning and growth
Social events for building strong relationships with colleagues from all across the organisation

Our Malta Office

Private health insurance
Wellness incentives, including a fitness allowance and mental well-being services
Flexible national holidays: public holidays mean more time off, choose how and when to enjoy them!
2 weeks Work From Anywhere (10 days), increased to 4 weeks (20 days) after longer duration of employment within the Company: explore the world while working remotely
Gourmet lunches and healthy snacks prepared by our in-house chef
Variety of discounts from local vendors
Access to some of the greatest tools and platforms for developing your professional skills and building success within your role
A range of training courses, known as Casumo College, for continuous learning and growth
Social events for building strong relationships with colleagues from all across the organisation

Our Skopje Office

Private health insurance
Wellness incentives, including a fitness allowance and mental well-being services
2 weeks Work From Anywhere (10 days), increased to 4 weeks (20 days) after longer duration of employment within the Company: explore the world while working remotely
Office lunches - three times per week
Access to some of the greatest tools and platforms for developing your professional skills and building success within your role
A range of training courses, known as Casumo College, for continuous learning and growth
Social events for building strong relationships with colleagues from all across the organisation

Our ABC values:

ASPIRE
At Casumo, "aspire" means pushing beyond the ordinary and transforming obstacles into stepping stones. Challenges are our breakfast of champions, and comfort zones are out of bounds. Mediocrity? Left behind. Our mantra? Dream big, aim high, and always be ready for the next adventure in innovation.

BELIEVE
Belief at Casumo isn't just a feel-good sticker; it's the glue that binds us. Turning "me" achievements into "we" victories, we're a tight-knit crew of dreamers, doers, and relentless supporters. With a high-five arsenal and a trusty cheerleading squad, we're on a mission to prove that together, we're not just strong; we're Casumo strong.

CARE
Care is our secret ingredient, the cherry on top of our game. It's not only about ensuring our players have a blast (responsibly, of course); it's about weaving a fabric of support so tight, even the toughest challenges can't tear us apart. From tailoring player experiences to being there for each other, we're all about creating memorable moments.

Quality Assurance Specialist