Engineer Jobs in Web3

OpenTag is an International company within the field of Sports Betting and iGaming.

Our mission is to create the best software through empowered teams, centralized around our product. We do this to help great organizations reach ambitious goals and fulfill their purpose with equally great teams.

We are looking for a Middle QA Engineer to join our Agile product development team. You will work closely with Front-End Developers, Back-End Developers, Product Owners, Delivery Managers, and fellow QA Engineers to ensure the quality and reliability of our products.

The role combines both manual and automation testing.

Tech stack: TypeScript, Playwright, GraphQL, REST APIs, GitLab, Kafka, k6, SQL/NoSQL, Docker, Kubernetes, Google Cloud, and other technologies used across our microservice-based platform.

• 3+ years of experience as a QA Engineer, with solid experience in software testing and test automation.

• Strong understanding of QA methodologies, processes, and testing artifacts.

• Good programming skills and practical experience with TypeScript/JavaScript or another object-oriented programming language.

• Hands-on experience with Playwright or a similar automation framework.

• Good understanding and practical experience with API testing, including REST APIs.

• Familiarity with GraphQL testing.

• Experience working with SQL and/or NoSQL databases.

• Experience with Git and version control workflows.

• Experience with CI/CD pipelines and automated test execution.

• Good understanding of Agile/Scrum methodologies.

• Experience with Jira and test/defect management tools.

• Strong analytical and problem-solving skills, with the ability to investigate issues and identify potential root causes.

• Understanding of microservice architecture and end-to-end system interactions.

• Experience with performance testing and tools such as k6, JMeter, or similar.

• Upper-Intermediate English and confidence in participating in technical discussions.

• Hands-on experience with AI tools and an AI-first mindset - actively uses AI in day-to-day QA/engineering workflows and demonstrates a genuine interest in exploring and adopting new AI-driven approaches to testing, automation, and problem-solving.

Would be a plus:

• Experience with Docker, Kubernetes, and/or cloud environments.

• Experience with Kafka or other event-driven/messaging technologies.

• Experience with Google Cloud.

• Experience with Karate, Cucumber, BDD, or Gherkin.

• Experience maintaining or contributing to an in-house automation framework.

• Experience with application logs, monitoring, and observability tools.

• Experience with advanced GraphQL testing.

• Experience with Apache Thrift or similar service-to-service communication technologies.

• Experience with performance analysis and interpreting performance test results.

What will you do? What tech do we use?

• Become part of a collaborative Scrum Team working on a microservice-based betting platform.

• Collaborate with developers, Product Owners, Delivery Managers, and other QA Engineers throughout the full development lifecycle.

• Actively participate in Scrum ceremonies and contribute to requirements clarification, test planning, risk analysis, and test coverage.

• Create, maintain, and execute comprehensive test cases and scenarios, while defining the appropriate automation scope.

• Develop, maintain, and improve automated tests using Playwright and TypeScript.

• Perform API testing using REST APIs, GraphQL, Postman, or similar tools.

• Perform regression, smoke, exploratory, integration, and end-to-end testing.

• Investigate defects across different layers of the application, including APIs, databases, logs, and communication between services, and assist with identifying root causes.

• Contribute to the maintenance and improvement of our in-house automation framework and QA tooling.

• Work with GitLab and CI/CD pipelines, including automated test execution and investigation of pipeline failures.

• Participate in performance testing and performance-related investigations using tools such as k6.

• Contribute to improving QA processes, testing standards, automation practices, and overall product quality.

• Take ownership of assigned QA activities and support less experienced QA Engineers through knowledge sharing.

  What do We offer?

  • An inspiring workspace with awesome teammates and a great vibe

  • The chance to build a scalable online betting platform — from the ground up

  • Cutting-edge tech stack and real impact on a fast-growing product

  • Learning opportunities with a dedicated training budget to level up your skills

  • 25 vacation days + an extra day off to celebrate your birthday 🎉

  • Premium health insurance for your peace of mind

  • Birthday vouchers and little surprises along the way

  • Free snacks, team lunches, and great coffee (because fuel matters ☕)

  • Sports card, transportation, and food allowance

  • Quarterly team events that bring everyone together

  Excited to join us? Click the Apply button and let’s build something amazing together!