Fullstack Engineer

About Sun Group And DEC
Sun Group is behind Vietnam's most iconic destinations, from Ba Na Hills to JW Marriott Phu Quoc, InterContinental Danang, and Sun World entertainment complexes. Beyond destinations, the Group has built a diverse ecosystem in Luxury Real Estate, Smart Infrastructure, Culture & Arts, and Aviation, shaping modern lifestyles across Vietnam.
At the core of this vision, the Digital Excellence Center (DEC) is Sun Group's strategic hub for technology and innovation. DEC drives digital initiatives across tourism, hospitality, real estate, aviation, and entertainment; bridging Sun Group's heritage of excellence with the future of digital-first experiences.
More than a transformation engine, DEC advances Vietnam's digital journey through key initiatives in data and AI. With a culture of agility and innovation, DEC empowers people to push boundaries, achieve breakthroughs, and create lasting value for both the Group and society.
Job Summary
As a Fullstack Engineer within the Platform teams, you will design, build, and operate AI-first E-Commerce and Digital Experience solutions across Sun Group's ecosystem. You will craft fast, reliable web applications and the services behind them - serving large user bases and high monthly transaction volumes - while integrating with world-class core systems and AI capabilities.
In this role, you will collaborate closely with your product development team and partners to elevate Sun Group's services and contribute to Vietnam's broader digital transformation.
Responsibilities

• Build and evolve user-facing apps using (or similar), modern TypeScript/JavaScript, reusable UI libraries, accessibility, and responsive design across devices.
• Optimize for performance & reliability: SSR/ISR/edge rendering, code-splitting, bundle optimization, caching (CDN/Redis), error boundaries, graceful degradation, and observability.
• Design idempotent, secure REST APIs; handle retries, backoff, saga/outbox patterns, and data consistency for transactional flows using
• Integrate with payment gateways, third-party partners and Sun Group's internal platforms securely via OAuth2/OIDC/JWT, API Gateway, and proper rate-limiting.
• Apply Agile and DevOps practices; CI/CD, automated testing, monitoring; to deliver high-quality code at speed.
• Contribute to technical design discussions, architecture improvements, and engineering best practices.

Qualifications

• Bachelor's degree in Computer Science, IT, Electronics/Telecom, or related fields.
• 5+ years of web application development on Linux; strong in modern JavaScript/TypeScript.
• 3+ years hands-on with and
• Experience building high-volume transactional features with attention to throughput, latency, scalability, and caching (Redis/CDN).
• Comfortable using ORMs and working with relational/NoSQL stores at an application level.
• Experience with Docker, Kubernetes, CI/CD; automated testing and observability.
• Strong understanding of data structures, algorithms, object-oriented design, and familiarity with WebSocket or gRPC is a strong plus.
• Exposure to cloud platforms such as Azure, AWS, or GCP is an advantage. Experience with Kafka, API Gateway, service mesh is a plus.

Soft Skills

• Strong problem-solving and systems thinking across end-to-end user flows.
• Clear communicator, collaborative with cross-functional teams.
• Growth mindset, fast learner, comfortable with ambiguity; proactive in raising quality bars.

WHY YOU'LL LOVE WORKING HERE

• "An cư lạc nghiệp" policy: eligible employees receive full-value commercial apartments for long-term tenure.
• Premium SunCare Insurance for employees and their families (fully covered for employees).
• Annual comprehensive health check-up at Sun Group International Hospital.
• Complimentary access to theme parks, cable cars, cultural/symphonic events, plus exclusive discounts at Hotels & Resorts.
• Special offers across aviation, NCB banking services, and real estate products.
• A dynamic, innovation-driven working environment where talent and contributions are recognized and rewarded.