Senior QA Engineer

About the Position

We are seeking a Senior QA Engineer with 6-8 years of experience to join our cybersecurity team in Ukraine. This role focuses on full-stack testing and strategic problem-solving in a fast-paced, technically diverse environment.

About You

You are a senior-level QA professional who excels in complex, fast-paced environments. You are a natural problem-solver who enjoys tracing root causes and investigating intricate system behaviors. You thrive on technical responsibility and acting as a bridge between diverse engineering teams. You are self-motivated, highly organized, and comfortable balancing high-level strategy with a hands-on approach to quality.

About the Project

We are building a leading cybersecurity platform designed to protect and monitor digital environments across the entire development lifecycle. The system covers everything from low-level system engineering and backend to frontend UX/UI, operating in a technically diverse environment with rapid growth and high-frequency releases. We focus on a blend of 80% manual and 20% automated testing to ensure functional excellence, performance, and security across all components. With a fast-paced deployment cycle, maintaining high-speed integration and system reliability is critical to our mission.

Responsibilities

• Full-Stack QA: Deliver high-quality testing for backend, frontend, and low-level system components at a fast deployment pace.
• Problem Solving: Apply an "out-of-the-box" approach to trace and troubleshoot complex bugs in system code and user interfaces.
• Strategic Testing: Define test strategies and handle end-to-end testing of new features.
• Collaboration: Work closely with Research and Development engineers to ensure seamless feature integration in an Agile environment.

Requirements

• 6–8 years of professional experience as a QA Engineer with a deep understanding of the SDLC and Agile methodologies.
• Full-stack testing expertise, including advanced proficiency in backend, frontend, and client-server API testing.
• In-depth Operating System knowledge, with extensive experience in both Windows and Linux environments.
• Comprehensive Networking & Security acumen, including the OSI model, data protocols (HTTP, DNS, IP, FW), and encryption principles.
• Infrastructure & Virtualization experience, specifically with technologies such as ESXi and Docker.
• Expert command of industry tools, including Jira for bug tracking and Wireshark or tcpdump for network and application monitoring.
• Automation & Scripting capabilities, including test automation execution and proficiency in Python, Bash, or JavaScript.
• English proficiency (at least B2), ensuring effective communication within a technical team.

We Offer

• A real opportunity to influence the product, architecture, and technical decisions;
• Direct communication with C-level management, without unnecessary bureaucracy;
• Remote-first environment;
• Long-term and enjoyable cooperation;
• 20 paid working days of vacation per year;
• 5 paid undocumented sick days;
• Official public holidays as days off;
• Personal legal support;
• English classes;
• Team-building events and a friendly, supportive atmosphere.

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