Description About KX: Our mission is to accelerate data and AI-driven innovation with high performance analytics solutions, enabling our customers to transform into AI-first enterprises. KX is trusted by the world's top investment banks & hedge funds, aerospace and defence, life and health sciences, semiconductor, telecommunications, and advanced manufacturing companies. Time series and vector data analytics and management are at the heart of our products, independently benchmarked as the fastest on the market. They help our customers process data at unmatched speed and scale and empower LOB leaders, developers, data scientists, and data engineers to build high-performance data-driven applications and turbocharge their favourite analytics tools in the cloud, on premise, or at the edge. KX technology enables the discovery of richer, actionable insights for faster, better-informed decision making which drives competitive advantage and transformative growth for our customers. KX operates across North America, Europe, and Asia Pacific. Role Overview: We are hiring QA Engineers at various experience levels, from mid-level professionals to senior experts. In this role, you will design and execute test plans, develop automation frameworks, and work closely with developers to maintain the highest quality standards for KX’s real-time data solutions. Experience with KX products, including KX Insights, KX Enterprise, or KDB/q, is highly beneficial and will be prioritized in candidate selection. Key Responsibilities: Develop and execute manual and automated test cases for KX products. Ensure the reliability, performance, and scalability of real-time data applications. Collaborate with development and product teams to define test strategies. Design and maintain test automation frameworks (for senior-level candidates). Perform functional, regression, performance, and security testing. Identify, document, and track defects, working closely with engineering teams for resolution. Contribute to continuous integration (CI) and continuous deployment (CD) pipelines. Mentor junior QA engineers and promote best practices (for senior-level candidates). Some on-call work may be required to support critical incidents, system maintenance, or client needs outside regular business hours. Required Skills & Experience: We encourage applications from candidates with varying levels of experience, with responsibilities and expectations adjusted accordingly. For Mid-Level Candidates: 2 years of experience in software testing or QA engineering. Strong knowledge of test design, execution, and defect tracking tools. Familiarity with Linux/Unix environments and scripting (Shell, Python, etc.). Basic understanding of SQL, time-series databases, and API testing. Experience with test management tools (JIRA, TestRail, etc.). For Senior Candidates: 5 years of experience in software QA, with a focus on automation and performance testing. Hands-on experience with KX products (KX Insights, KX Enterprise, KDB/q). Strong expertise in automated testing frameworks (Selenium, Cypress, Robot Framework, etc.). Experience with load testing, benchmarking, and scalability testing. Familiarity with CI/CD tools (Jenkins, GitLab CI, Azure DevOps, etc.). Ability to lead test planning, automation strategy, and mentor junior team members. Preferred Qualifications (for all levels): Experience testing real-time data systems, trading platforms, or high-frequency applications. Knowledge of cloud platforms (AWS, Azure, GCP) and containerized environments (Docker, Kubernetes). Understanding of performance profiling, monitoring, and debugging tools. ISTQB certification or experience in an Agile/DevOps testing environment. Location & Workplace Type: This position takes on a Hybrid working model based in Belfast, NI. Why Choose KX? Data Driven: We lead with instinct and follow fact. Naturally Curious: We lean in, listen and learn fast. All In: We take ownership, take on challenges and give it our all. Benefits Competitive Salary Individually tailored training and skills development Private healthcare package and Employee Assistance Programme Enhanced maternity and paternity package Wellness Days and Volunteer Days