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Job Overview

We are looking for a Senior Developer who is both a strong system designer and a hands-on builder. You’ll take the lead in architecting and developing our next-generation chat platform and AI-driven agentic systems, built to handle massive data flows and real-time interactions at scale. The primary focus of this position is the designing, building, and owning robust and highly scalable systems. As a key member of the team, you will be responsible for providing direct, hands-on coding and design contributions, while mentoring team members and driving technical excellence.

Key Responsibilities

• Design and build high-performance, scalable backend systems and services that power large-scale, real-time chat and AI interaction platforms.
• Analyze business requirements and translate them into actionable, high-level technical specifications
• Lead technical direction — define system architecture, set technical standards, and ensure scalability and reliability.
• Write and review code to ensure best practices, performance, and maintainability.
• Collaborate closely with Product, DevOps teams and other stakeholders to bring ideas to life quickly and reliably.
• Mentor and guide engineering teams on design principles, coding standards, performance optimization, and architectural best practices.
• Proactively identify bottlenecks and performance issues across systems and drive solutions.
• Ensure strong practices in monitoring, alerting, resilience, and fault-tolerance.

Requirements:

• Experience: 7+ years in Software Development, including significant time as a Senior Developer or Team Lead, with proven experience designing and building large-scale systems.
• Hands-on mindset — you enjoy both designing the big picture and implementing critical components yourself.
• Strong understanding of distributed systems, data-intensive architectures, and system performance optimization.
• Open to any tech stack — what matters is adaptability and the willingness to learn. (Go, Java are preferred, but mindset > syntax.)
• Solid understanding of system scalability, reliability, security, and maintainability principles.
• DevOps & Infrastructure: Solid understanding of CI/CD, automation, infrastructure-as-code (e.g., Terraform), and cloud deployment models.
• Passion for problem-solving, experimentation, and leveraging new technologies (including AI) to deliver better outcomes.

Preferred Qualifications

• Experience with real-time or AI-integrated systems, especially chat or agentic platforms.
• Demonstrated ability to balance architecture vision with pragmatic execution.
• Communication: Excellent verbal and written communication skills to effectively interact with both technical and non-technical stakeholders.
• Leadership: Proven ability to lead and motivate teams.
• Problem-Solving: The ability to identify and solve complex problems.
• Technical: Proficiency in relevant software and tools (e.g., SQL, data visualization tools).
• Self-motivated, proactive, and capable of thriving in a fast-paced environment.

• Full SHUI as Vietnamese Law
• Competitive salary, review every 12 months
• Bonus based on Annual Performance
• 100% Gross salary during probation period Perks
• Premium Private Medical Insurance and annual health check
• 14-day annual leave, and 3 consecutive 30 mins/day menstrual leave for women
• Lunch & Parking allowance, Company trip, YEP and monthly gathering time
• Gifts on special occasion and fully stocked snack corner
• Apple product-equipped workstation
• Professional working environment
• Flexible working hours