Senior Quality Assurance Engineer

Web3 Foundation; United States; Remote; USD 90,000 - 130,000; Full time

Job summary

A leading technology company seeks a Senior QA Engineer to oversee quality for its innovative product suite. You'll own the end-to-end testing strategy, implement automation, and ensure product security. This role demands a strong QA background in consumer web/mobile applications, particularly within blockchain or fintech environments.

Qualifications

• 3+ years in QA for consumer web/mobile apps with 2+ years in automation.
• Deep experience in a web/mobile automation stack.
• Excellent written and verbal English communication.

Responsibilities

• Define and improve QA standards and release criteria.
• Build and maintain automated test frameworks.
• Drive load and stress testing for performance and reliability.

Skills

Automation

JavaScript

TypeScript

Testing

Collaboration

Tools

QA Tools

Job description

About the role

You will be the quality champion for our entire product suite— including self-custodial wallet, account abstraction products, Node RPC services, and a pipeline of web / mobile dApps. As the first senior-level QA on the team, you will own test strategy end-to-end, automate for scale, and embed security-critical thinking into every release.

Key responsibilities

• Quality strategy & process: Define and continuously improve QA standards, release criteria, and metrics. Select and maintain the right toolchains.
• Automation: Build and maintain a unified test automation framework covering web, mobile and backend APIs.
• Functional & regression testing: Author and execute test plans for new wallet features, account-abstraction flows, and future dApps. Ensure backward compatibility across wallet versions and blockchain networks.
• Performance & reliability: Drive load, stress, and fail-over testing.
• Cross-team collaboration: Partner with Product, Design, and Engineering Leads to refine acceptance criteria. Taking ownership, follow up and drive the quality assurance workflow.

Qualifications

Required experiences

• 3+ years in QA for consumer web/mobile app, blockchain or fintech products, with at least 2+ years leading automation efforts.
• Deep experience in one web/mobile automation stack.
• Strong JavaScript/TypeScript competence.
• Excellent written & verbal English; able to write crisp test plans and bug reports.

Nice-to-have

• Prior work on a self-custodial crypto wallet, or DeFi app.
• Familiarity with Solidity, smart contract security basics and testing.
• Knowledge of account abstraction.
• Startup or scale-up experience; comfortable with rapid iteration.
• Experience of utilizing AI tools for testing.