ph3Who We Are /h3pFreedx is a newly established cryptocurrency exchange focused on building a scalable, compliant, and liquidity driven trading platform. Our team brings deep experience across crypto exchanges, payments, market structure, and financial infrastructure. Freedx is built for serious traders and emerging markets, with a clear focus on unit economics, operational discipline, and sustainable growth. /ph3Our Vision /h3pFreedx aims to be a trusted global exchange by combining strong liquidity, efficient onboarding, and disciplined growth execution. We focus on long term retention and monetization rather than vanity metrics, ensuring that growth directly translates into trading volume, revenue, and profitability. /ph3Role Overview /h3pWe are looking for a Senior QA Engineer to ensure the quality, reliability, and accuracy of trading and related products for a centralized crypto exchange. /ppThis role requires strong technical knowledge and an understanding of complex financial systems. You will test core trading operations, real-time data streams, financial calculations, APIs, system integrations, analytics, and user-facing dashboards. /ppYou will work closely with Product Managers and Engineering teams throughout the full development lifecycle, from requirement analysis and test planning to release validation and production incident investigation. /ppThe adecuado candidate understands how trading systems behave under normal, edge-case, and failure scenarios and can identify risks related to incorrect calculations, delayed data, system synchronization, balance inconsistencies, and order execution. /ph3Responsibilities /h3ulliOwn the QA process for trading and analytics products /liliReview product requirements and identify missing scenarios, risks, and technical dependencies /liliTest order creation, execution, cancellation, rejection, and order status transitions /liliTest system integrity,



real-time market data, WebSocket streams, and synchronization between services /liliValidate PnL, margin, liquidation, fees, balances, funding, and risk-control calculations /liliTest trading dashboards, system analytics, reports, and data consistency /liliPerform functional, integration, API, UI, regression, and end-to-end testing /liliCreate test plans, test cases, checklists, test data, and regression suites /liliVerify that product delivery meets functional, technical, and quality standards /liliTest negative scenarios, edge cases, service failures, and recovery flows /liliInvestigate production issues, reproduce defects, analyze logs, and support incident reviews /liliWork closely with Product Managers, developers, DevOps, data, and support teams /liliImprove release validation, defect prevention, QA processes, and test coverage /liliCross device product support /li /ulh3Requirements /h3ulli4+ years of QA experience /liliExperience with crypto or FX exchanges, brokerage, fintech, or trading platforms /liliStrong understanding of order books, order types, liquidity, margin, PnL, fees, and liquidation /liliExperience testing APIs, WebSockets, databases, analytics dashboards, and complex data flows /liliExperience with functional, integration, regression, and end-to-end testing /liliAbility to validate financial calculations and complex business logic /liliAbility to analyze system behavior across multiple connected services /liliStrong analytical, technical,



and communication skills /liliHigh attention to detail and a structured approach to problem-solving /liliExperience with test automation is a plus /liliKnowledge of authentication, payments, deposits, withdrawals, and balance operations is a plus /liliEnglish level B2 /li /ulh3Technical Skills And Tools /h3ulliStrong experience testing REST APIs using Postman or similar tools /liliExperience working with Swagger/OpenAPI documentation /liliExperience testing WebSocket connections and streamed data /liliGood knowledge of HTTP, JSON, authentication methods, request headers, status codes, and API error handling /liliExperience using browser developer tools for frontend and network debugging /liliExperience with log monitoring and analysis tools such as Kibana, Grafana, Datadog, or similar /liliExperience with performance-testing tools such as JMeter, k6, or similar /liliExperience with test management and issue-tracking tools such as Jira, TestRail, Zephyr, or similar /liliUnderstanding of microservice architecture, message queues, and asynchronous system communication /liliExperience with Kafka, RabbitMQ, or similar technologies is a plus /liliAbility to write SQL queries and validate data directly in databases is a plus /liliExperience with automation tools such as Playwright, Cypress, Selenium, or similar is a plus /li /ulh3Benefits /h3pFreedx is an equal opportunity employer. We stand for an open and inclusive work environment that fosters the well-being of everyone. We embrace and encourage differences in age, color, disability, ethnicity, family or marital status, gender identity or expression, language, national origin, physical and mental ability, race, religion, sexual orientation, socio-economic status, veteran status, and other characteristics that make our people unique. /p /p #J-18808-Ljbffr

📌 Senior QA Engineer - Trading & Analytics (España)
🏢 FreedX
📍 España