Qualgo Technologies Vietnam ★ 3.3

As a Senior Software Engineer – Front End, you will be responsible for designing, developing, and maintaining the user interfaces for our next-generation secure email platform. You will work at the intersection of Cybersecurity and Artificial Intelligence, building intuitive interfaces that allow users to visualize threats, understand AI verdicts on phishing/malware, and take immediate security actions.

You will work closely with backend engineers, AI Engineers, product managers, and designers to build a world-class platform that protects users from sophisticated email compromises. You will be a hands-on developer, writing high-performance React code and contributing to architectural decisions that ensure the security and speed of our service.

Frontend Development:

• Architect and develop the frontend of our secure email client and threat management dashboard using ReactJS and TypeScript.
• Write high-quality, well-tested, clean, and reusable code that handles the complexities of email rendering and security visualizations.
• Implement responsive and accessible user interfaces that maintain high performance even when processing large volumes of email data and threat intelligence logs.
• Optimize frontend performance (Core Web Vitals) to ensure a seamless, lag-free experience comparable to desktop applications.

AI/ML Integration (UI Focus):

• Collaborate with backend engineers and data scientists to bring "Explainable AI" to life; develop UI components that clearly visualize why an email was flagged as phishing or malware.
• Create interactive dashboards that display complex threat data, attack vectors, and AI confidence scores in a user-friendly manner.
• Develop interfaces for "Human-in-the-loop" workflows, allowing users to provide feedback to our AI models (e.g., false positive reporting).

Real-Time Security Operations:

• Implement real-time features using WebSockets or Server-Sent Events (SSE) to notify users of immediate security threats or email arrivals without page refreshes.
• Integrate with complex state management flows to handle immediate remediation actions (e.g., quarantining an email instantly across the organization).

UI/UX Best Practices:

• Champion UI/UX best practices with a focus on Trust and Safety; ensure the interface communicates security status clearly without causing alert fatigue.
• Work closely with designers to translate high-fidelity prototypes into pixel-perfect, functioning code.

Testing & Security:

• Write robust unit, integration, and end-to-end tests (Jest, Playwright) to ensure the reliability of the email client.
• Security First: Implement strict Content Security Policies (CSP), sanitize HTML email content to prevent XSS attacks, and adhere to secure coding standards.

Mentorship & Technology:

• Provide technical guidance, code reviews, and mentorship to junior frontend engineers.
• Evaluate and investigate new frontend technologies to improve the rendering speed and security of the platform.
• Perform the duties and tasks assigned by your direct report or as otherwise instructed by the Company.
  

Education:

• Bachelor's degree in Computer Science, Engineering, or a related field.

Experience:

• Minimum of 5+ years of experience in frontend software engineering.
• Expert proficiency in ReactJS and its core principles (Hooks, Context API, Virtual DOM).
• Strong experience with TypeScript is mandatory.
• Experience building complex, data-rich web applications (e.g., Dashboards, Email Clients, SaaS platforms, CMS).
• Experience with State Management libraries (Redux Toolkit, Zustand, or TanStack Query).
• Experience with Real-time communication (WebSockets or Socket.io) for live data updates.
• Experience with Testing frameworks (Jest, React Testing Library, and E2E tools like Cypress or Playwright).
• Experience with Data Visualization (D3.js, Recharts, or Chart.js) to visualize security threats is a strong plus.
• Experience with modern tooling (Vite, Webpack, Babel) and CI/CD pipelines.

Domain Knowledge:

• Familiarity with Cybersecurity concepts (Phishing, Malware, SOC, SIEM).
• Experience handling Email protocols or rendering (MIME types, HTML Email sanitization).
• Familiarity with AI/ML concepts (LLMs, Classification models) and integrating AI streams into the UI.

Skills:

• Exceptional technical skills in JavaScript/TypeScript, HTML5, and CSS3 (TailwindCSS or Styled Components).
• Strong understanding of Web Security (XSS, CSRF, CORS, CSP) – Critical for this role.
• Good understanding of UI/UX principles, specifically for complex enterprise applications.
• Excellent problem-solving and analytical abilities.
• Good communication and collaboration skills in a remote/hybrid setup.
• Passion for building high-quality, user-centric web applications.
• Fluency in English to work with global team.