Senior QA Engineer (Crypto Exchange)

• Location: Remote
• Type: Full-time, dedicated

About Extsy

Extsy is a next-generation crypto exchange that combines world-class trading technology with lifestyle-driven financial experiences. We’re on a mission to make digital assets part of everyday life, with products that are secure, scalable, and user-focused.

We’re building our QA team from the ground up, and we need a Senior QA Engineer to take ownership of platform-wide quality.

Role Overview

As a Senior QA Engineer at Extsy, you won’t just test core trading functionalities, you’ll be responsible for the quality of the entire platform. From matching engines, order books, and trading APIs to auth, KYC, wallets, payments, notifications, and lifestyle modules, you’ll ensure every part of our ecosystem is tested, secure, and reliable.

You will define the QA vision, set up automation frameworks, and lead UAT cycles ensuring Extsy delivers a seamless, secure, and world-class experience across all features.

Key Responsibilities

• Own end-to-end QA strategy and execution for the entire Extsy platform.
• Build and maintain test plans, automation suites, and frameworks.
• Test core trading systems (matching engine, order book, spot & futures modules).
• Validate user-facing modules such as Auth, KYC, Wallets, Payments, Notifications, and Lifestyle features.
• Perform functional, regression, integration, performance, security, and UI/UX testing.
• Test blockchain integrations: deposits, withdrawals, wallet APIs, and on-chain settlements.
• Drive cross-platform testing (web, mobile, APIs).
• Lead UAT and release cycles, ensuring production readiness.
• Collaborate closely with developers, product managers, and designers to make sure requirements are testable and aligned with QA standards.
• Mentor junior QA engineers and enforce a quality-first culture across the team.

Required Skills & Experience

• 5–7 years of QA/testing experience, with 2+ years in crypto or fintech platforms.
• Proven experience testing crypto exchange systems: order matching, order books, APIs, wallets.
• Strong expertise with automation frameworks.
• Skilled in API testing and performance testing.
• Experience testing auth, KYC, payments, notifications, and other user-facing flows.
• Familiarity with blockchain transaction flows (deposits, withdrawals, confirmations).
• Strong knowledge of databases, caching, and queues.
• Solid understanding of CI/CD integration for QA automation.
• Excellent analytical, debugging, and communication skills.

⭐ Nice-to-Haves

• Previous experience at a leading crypto exchange or fintech platform.
• Exposure to derivatives trading (futures, margin, perpetuals).
• Security testing experience in crypto or fintech systems.

What We Offer

• Competitive salary + token options.
• Opportunity to build QA foundations for a high-performance global exchange.
• Early ownership in ensuring trust, security, and reliability.
• Remote-first, flexible work culture.
• Fast-paced startup environment with room to grow into QA leadership.