Middle Frontend Developer Focused on Whitebox QA: Unit, Module, Integration Tests

Job Description

Company Overview

LATOKEN is a global digital asset exchange platform that focuses on providing innovative blockchain-based financial solutions for users worldwide. The company is recognized for its strong technology-driven culture, fast-paced environment, and commitment to delivering secure and scalable crypto trading infrastructure. LATOKEN supports a wide range of digital assets and blockchain projects while continuously improving its products to meet evolving market demands.

The company values innovation, analytical thinking, and engineering excellence. Its development teams work on cutting-edge products that require high performance, reliability, and advanced testing standards. LATOKEN encourages employees to explore new technologies, contribute ideas, and grow within a globally distributed technical environment.

Job Details

• Job Title: Middle Frontend Developer Focused on Whitebox QA: Unit, Module, Integration Tests
• Company: LATOKEN
• Employment Type: Full-time
• Work Mode: Remote / Hybrid
• Department: Frontend Engineering & QA
• Experience Required: 2–5 Years
• Industry: Blockchain / FinTech / Cryptocurrency
• Location: Global Remote Opportunities Available

This role is designed for developers who are passionate not only about frontend development but also about software quality assurance through whitebox testing strategies.

Job Description

LATOKEN is seeking a skilled and detail-oriented Middle Frontend Developer with a strong focus on whitebox QA methodologies, including unit testing, module testing, and integration testing. The ideal candidate will be responsible for building scalable frontend applications while ensuring high-quality, thoroughly tested code across multiple environments.

In this role, you will collaborate with frontend engineers, backend developers, QA specialists, and product managers to create stable, secure, and user-friendly applications. You will work extensively with modern JavaScript frameworks and testing tools to improve application reliability, maintainability, and performance.

The position requires a developer who understands both software engineering principles and testing architecture. You will actively participate in designing automated testing pipelines, improving code coverage, identifying edge cases, and ensuring frontend components function seamlessly within larger application ecosystems.

As part of a blockchain-focused company, you will contribute to highly interactive dashboards, trading interfaces, authentication systems, and financial management tools used by global users in real time.

Key Responsibilities

• Develop and maintain responsive frontend applications using modern JavaScript frameworks such as React.js or Vue.js.
• Design, implement, and maintain whitebox QA strategies for frontend systems.
• Write comprehensive unit tests, module tests, and integration tests for frontend components and business logic.
• Collaborate with backend engineers to validate API integrations and ensure stable communication between services.
• Improve testing coverage and maintain high code quality standards across projects.
• Participate in debugging, troubleshooting, and performance optimization activities.
• Create reusable UI components and scalable frontend architectures.
• Ensure cross-browser compatibility and responsive behavior across devices.
• Work closely with DevOps and QA teams to support CI/CD pipelines and automated testing workflows.
• Conduct code reviews and contribute to engineering best practices.
• Monitor frontend application behavior and proactively identify issues before production deployment.
• Maintain technical documentation related to testing frameworks, frontend modules, and deployment processes.

Required Skills & Qualifications

• Bachelor’s degree in Computer Science, Software Engineering, or a related technical field.
• 2–5 years of professional frontend development experience.
• Strong proficiency in JavaScript, TypeScript, HTML5, and CSS3.
• Hands-on experience with React.js, Vue.js, or similar frontend frameworks.
• Deep understanding of whitebox testing methodologies.
• Experience writing unit tests using Jest, Mocha, Vitest, or similar frameworks.
• Knowledge of module and integration testing practices.
• Familiarity with testing libraries such as React Testing Library or Cypress.
• Understanding of REST APIs and asynchronous programming.
• Experience with Git and collaborative version control workflows.
• Strong debugging and problem-solving skills.
• Understanding of frontend performance optimization techniques.
• Ability to work independently in a remote-first environment.

Preferred Qualifications

• Experience working in blockchain, fintech, or cryptocurrency platforms.
• Familiarity with CI/CD tools such as GitHub Actions, Jenkins, or GitLab CI.
• Knowledge of Docker and cloud-based deployment environments.
• Experience with scalable frontend architecture patterns.
• Understanding of security best practices in frontend development.

Benefits

• Competitive salary package with performance-based incentives.
• Remote work flexibility with global collaboration opportunities.
• Exposure to cutting-edge blockchain and cryptocurrency technologies.
• Career growth opportunities within a rapidly growing fintech company.
• Access to advanced technical learning and mentorship programs.
• Opportunity to work on large-scale real-time applications.
• International team culture with diverse engineering expertise.
• Flexible working hours and supportive work environment.
• Participation in innovative projects shaping the future of digital finance.

Why Join LATOKEN?

Working at LATOKEN offers the opportunity to combine frontend engineering expertise with advanced software testing methodologies in a highly technical environment. The company values developers who care deeply about product stability, software quality, and scalable architecture.

This role is ideal for engineers who enjoy solving complex technical problems, improving testing infrastructure, and building applications that operate in high-demand financial systems. You will gain experience working with modern frontend ecosystems while contributing directly to products used by a global audience.

How to Apply

Interested candidates should prepare the following documents before applying:

• Updated resume highlighting frontend development and QA testing experience.
• Portfolio or GitHub profile showcasing frontend projects and testing implementations.
• Brief cover letter explaining interest in blockchain technology and frontend quality assurance.

Applicants with strong expertise in unit testing, module testing, and integration testing frameworks will be highly preferred for this position.