Senior QA Engineer

Would you like to build a career in a leading multinational IT company? We are looking for a Senior QA Engineer with a strong manual testing background and a technical mindset to join our team. This role is focused mainly on manual and system-level testing, including end-to-end validation, API/backend flows, and investigation of complex issues across the platform. At the same time, we are looking for someone interested in growing toward a more general QA role by contributing to automation efforts, working with existing frameworks, and collaborating on quality improvements across the product. Since 2007, MMDSmart has been a leading supplier in cloud communications, delivering game-changing IT products to businesses in over 100 countries. Our success is fueled by the inspiration and innovative ideas of our team members, encouraging their growth and impacting our Messaging and Voice solutions. These empower our clients to communicate more effectively with their customers. Don’t miss this chance to excel in a rapidly expanding tech company, where your potential and ambitions are not just recognized, but celebrated. ## Requirements

What will you do at MMDSmart?

• You will analyze business requirements and technical specifications for both web interfaces and backend, proactively challenging architectural assumptions to prevent issues before they reach production. - You will act as a System Investigator - performing deep-dive analysis of complex multi-channel message flows using platform logs, webhook payloads, and event traces to identify root causes of delivery and logic defects across SMS, Telegram, Viber, and other channels. - You will design and execute advanced end-to-end test strategies that cover the full message lifecycle - from operator action in the web UI, through API and channel gateway, to delivery confirmation - ensuring what the client experiences matches expected behavior. - You will contribute to performance testing efforts using Locust and other tooling, covering throughput of message delivery, API response times under load, and system resilience under concurrent channel activity. - You will drive quality improvements within an Agile environment, participating in architectural reviews and brainstorming sessions to advocate for testability, observability, and system stability. - You will support the existing Playwright-based automation efforts, collaborating with automation engineers to improve coverage for critical UI flows and helping ensure automated quality checks are reliable within the CI/CD pipeline. - You will maintain technical documentation and RCA reports, ensuring that complex, hard-to-reproduce bugs are well-documented and that the team learns from every critical defect.