Full Stack Developer (NodeJS/ReactJS)

About SoftFlex 

SoftFlex LLC is a global IT product company specializing in online payment solutions, e-wallets, and entertainment applications. At SoftFlex, we value strong work ethics, collaboration, and execution excellence, striving to create real value through efficient processes and high-quality software. 

Job Summary 

This Full Stack Developer role is responsible for full-cycle software development, including coding, testing, deployment, troubleshooting, and system maintenance while collaborating with internal and external cross functional teams to ensure software quality and performance.  

Trách nhiệm công việc

Duties & Responsibilities   

• Design, develop, and maintain scalable backend services and frontend applications. 
• Build and enhance high-performance fintech/product systems handling large-scale concurrent users and high-volume transactions. 
• Design and implement scalable microservices and distributed system architectures. 
• Develop reliable APIs, asynchronous processing flows, and event-driven services. 
• Optimize system performance, scalability, reliability, and application responsiveness. 
• Collaborate closely with PDM, designers, mobile developers, DevOps teams, and other stakeholders to deliver high-quality products. 
• Design and maintain efficient database structures, caching strategies, and data processing workflows. 
• Troubleshoot and resolve production issues, performance bottlenecks, and distributed system challenges. 
• Implement secure, maintainable, and reusable code following engineering best practices. 

Reporting and Monitoring 

• Provide regular progress updates to the Director/PDM/Lead Developer of team 
• Create and maintain technical documentation, including code specifications and processes. 
• Maintain up-to-date documentation for knowledge sharing and system sustainability. 
• Produce weekly/monthly performance code report to PDM/Lead Developer of team 

Cooperation & Collaboration 

• Work collaboratively with internal teams, external vendors, and stakeholders to ensure alignment and delivery quality.  
• Actively comply with company standards. 

Yêu cầu

• 4+ years of experience with backend development using Node.js/NestJS and frontend development using React.js, TypeScript, JavaScript (ES6+). 
• Strong understanding of Clean Code, SOLID principles, dependency injection (DI), modular architecture, and scalable application design. 
• Experience designing and building scalable microservices, distributed systems, and high concurrency/high-transaction platforms. 
• Strong understanding of RESTful APIs, asynchronous processing, event-driven architecture, background jobs, caching strategies, and message queues. 
• Experience working with relational, NoSQL, and graph databases such as PostgreSQL, Redis, and Neo4j. 
• Experience with Google Cloud Platform (GCP), especially GKE, Google Pub/Sub, and cloud-native architectures. 
• Hands-on experience with Docker, Kubernetes, CI/CD pipelines, monitoring, observability, and system performance optimization. 
• Good understanding of system design, scalability, reliability, application security, authentication/authorization, and secure coding best practices. 
• Experience writing clean, maintainable, and testable code with unit/integration testing practices. 
• Good problem-solving skills and ability to work independently in Agile/Scrum environments. 
• Good English communication skills.