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Senior Software Engineer in Test

Kaizengaming

Sofia, Bulgaria (Bulgaria) Remote permanent

Posted: February 10, 2026

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Quick Summary

We are looking for a Senior Software Engineer to join our team in Sofia, Bulgaria.

Job Description

We are Kaizen Gaming

Kaizen Gaming, the team powering Betano, is one of the biggest GameTech companies in the world, operating in 19 markets. We always aim to leverage cutting-edge technology, providing the best experience to our millions of customers who trust us for their entertainment.

We are a diverse team of more than 2.700 Kaizeners, from 40+ nationalities spreading across 3 continents.

Our #oneteam is proud to be among the Best Workplaces in Europe and certified Great Place to Work across our offices. Here, there’ll be no average day for you. Ready to Press Play on Potential?

Let’s start with the role

You will join an autonomous Agile team and work closely with the Product Owner, Agile Delivery Lead and Software Engineers to create a competitive advantage for Kaizen and offer a unique online experience to our customers.

As a Senior Software Engineer in Test, you will utilize your experience and technical expertise to make your mark in our software development’s life cycle. Relish the chance to create an impact in this key role where you will liaise with talented engineers and business experts. Your understanding of the testing life-cycle will see you liaise seamlessly with a broad cross-section of colleagues, product owners and stakeholders, and provide a vote of confidence regarding the quality of the product.

As a Senior Software Engineer in Test you will:

• Review user stories and acceptance criteria in order to develop effective test plans and both manual and automated tests cases in collaboration with the development team

• Design complex automation solutions regarding functional and non functional testing

• Guide cross-teams’ SETs in designing and implementing infrastructural solutions

• Conducts code reviews and pair programming sessions

• Implement your deep knowledge of testing strategies and demonstrate the ability to contribute in all levels of the test pyramid

• Responsible for the STLC of new features on testing suites, taking technical ownership to ensure timely and quality delivery

• Research test tools, methodologies, and trends and upgrade existing practices and processes.

• Work independently, coach fellow software engineers in test and develop their technical skills.

• Mentor colleagues in view of ambiguity and constant changes.

What you’ll bring

We are looking for a Senior Software Engineer in Test who is a team player with a can-do attitude and excellent communication skills.

• BS/MS degree in Computer Science/Software Engineering or an IT related discipline

• 5+ years of experience as a Senior Software Engineer in Test (this is just an indication, your actual skills matter the most)

• Hands-on and strong experience in OOP languages (C# preferable)

• Strong knowledge of software QA methodologies, tools and processes

• Hands-on experience with web browser automation tools (e.g. Selenium / Playwright)

• Good understanding of all levels of the testing pyramid

• Experience in defect tracking and test management tools such as JIRA, X-Ray etc

• Familiarity with relational database engines (SQL)

• Experience working with Agile/Scrum software development methodology

• Experience working closely with product teams to understand requirements and verify/validate they are met

• Passion for continuous learning and self-development

• Fluent communication skills in English (both written & verbal)

• Understanding of Behavior Driven Development

Kaizen Gaming Perks

• 🕑 We offer both work from the office (hybrid model) & remote working options

• .🏃 A buddy will support you with your onboarding.

• 💸Competitive salary package and bonus scheme.

• 👩‍⚕️ Health and life insurance for you and your family.

• 📚 Unlimited access to Udemy & continuous training for all your learning and development needs.

• 💰 Monthly allowance for lunch & commuting expenses.

• 💻Nice rigs - 2.5K monitor, latest i7, tons of RAM, fast SSD.

#LI-Hybrid

#LI-gs1

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We are an equal opportunity employer committed to fostering a diverse and inclusive workplace. We welcome applications from individuals of all backgrounds, regardless of race, gender, religion, sexual orientation,or age.

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