Senior QA Engineer, Core Squad

Diabolocom builds AI-first, cloud-native contact center infrastructure designed for high availability, low latency, and global scale. As both a software provider and a telecom operator, we combine a fully owned carrier-grade voice backbone with a programmable CCaaS platform that supports real-time, high-volume communications across 60+ countries.

Our architecture integrates proprietary AI models purpose-built for customer interactions and covers data enrichment, intent detection, call summarization, transcription, quality scoring, workflow automation and more. These services run on a modular, service-oriented stack accessible through APIs and engineered for multi-language, multi-region deployments.

We operate a distributed infrastructure optimized for deterministic performance, observability, and resilience, supported by deep CRM integrations, intelligent routing engines, and a high-throughput outbound dialer that enables sub-second decisioning. A dedicated Diabolocom Research team keeps us at the forefront of technological innovation, designing new proprietary systems—from advanced AI pipelines to telecom optimization—that help our clients gain a competitive advantage in the market.

With more than 20 years of telecom and software engineering experience, Diabolocom offers engineers the opportunity to build and scale enterprise-grade systems that blend AI, cloud infrastructure, and mission-critical communications.

As part of our exponential growth, we are strengthening our internal engineering team and opening a Senior QA Engineer position in our Core Squad.

The Core Squad is responsible for the design and development of all key entities of our product, ensuring proper interaction between other squads and services. We also realize the isolation of entities within our application to achieve the convenience of large customers.

On the QA side, we develop and maintain automated tests using Kotlin and Gherkin. Our test coverage extends across:

• UI tests

• Backend API tests

• RabbitMQ interactions (produce and consume RabbitMQ events to validate integration points)

We strongly believe in a testing pyramid approach: most checks should live close to the code (unit, component, API, contract and integration tests), with UI and end-to-end tests focused on critical user journeys rather than "testing everything through the UI".

We practice a shift-left approach, involving QA from the earliest stages of feature planning. This ensures we maintain a user-centric perspective, influence implementation details when necessary, and distribute test coverage responsibilities among QA, frontend, and backend teams.

• Co-design test strategies with the team for new features and refactorings.

• Implement and maintain automated tests in Kotlin at multiple levels.

• Challenge designs and technical solutions from a risk and testability perspective.

• Continuously improve our pipelines, tooling, and test reliability.

• Languages & Frameworks: Kotlin, Spring Boot, Cucumber

• Build Tool: Gradle

• CI/CD: Git Lab

• Browser control tool: Selenium

• Reporting: Allure Report with Allure Server

• 2 QA engineers

• 4 backend developers

• 1 frontend engineer

• Minimum 6 years of experience
  , among which at least 3 recent years as a test automation engineer using Java / Kotlin / Groovy / Scala.

• Strong coding skills in a JVM language (ideally Kotlin or Java), with the ability to read and understand production code, review merge requests, and write clean, maintainable automated tests.

• Strong system-level and architectural thinking – you understand how services interact, how data flows through the system, and you use this understanding to design an effective test strategy.

• Hand…