Senior QA Engineer - Crypto Trading Platform | Data & API

Visa Hunt; Georgia; On-site; USD 90,000 - 130,000; Full time

Job summary

Freedx is seeking a Senior QA Engineer to ensure quality and reliability of trading and related products for a centralized crypto exchange. You will test core trading operations, real-time data streams, APIs, system integrations, dashboards, and analytics across the full development lifecycle.

Strong focus on financial calculations, risk controls, and data integrity. The ideal candidate has 4+ years in QA for trading platforms, with experience in REST/WebSocket ecosystems, and a solid

Qualifications

• Minimum 4+ years of QA experience in crypto/FX brokers, fintech, or trading platforms.
• Strong understanding of order books, liquidity, margins, PnL, fees, and liquidation.
• Experience testing APIs, WebSockets, databases, analytics dashboards, and complex data flows.
• Experience with functional, integration, regression, and end-to-end testing.
• Ability to validate financial calculations and complex business logic.
• English level B2.

Responsibilities

• Own the QA process for trading and analytics products.
• Review product requirements and identify missing scenarios, risks, and dependencies.
• Test order creation, execution, cancellation, rejection, and status transitions.
• Test real-time data streams, WebSocket, and synchronization between services.
• Validate PnL, margin, liquidation, fees, balances, funding, and risk-control calculations.
• Test dashboards, analytics, reports, and data consistency.
• Perform functional, integration, regression, and end-to-end testing.
• Create test plans, cases, checklists, data, and regression suites.
• Investigate production issues, reproduce defects, and support incident reviews.
• Collaborate with Product, Developers, DevOps, Data, and Support teams.

Skills

QA experience

Analytical skills

Communication skills

English proficiency

Tools

REST APIs testing

Postman

Swagger/OpenAPI

WebSocket testing

Kibana/Grafana/Datadog

JMeter/k6

Jira/TestRail/Zephyr

Playwright/Cypress/Selenium

SQL queries

Job description

Freedx is seeking a Senior QA Engineer to ensure quality and reliability of trading and related products for a centralized crypto exchange. You will test core trading operations, real-time data streams, APIs, system integrations, dashboards, and analytics across the full development lifecycle.

Strong focus on financial calculations, risk controls, and data integrity. The ideal candidate has 4+ years in QA for trading platforms, with experience in REST/WebSocket ecosystems, and a solid