Nguyễn Thế Mạnh

Link: https://viettel.vn/vx
Client: Viettel
Team Size: 15 members
Role: Java Developer

Description:
Contributing to the development of Viettel’s integrated digital ecosystem platform (VX), which serves as a centralized system connecting multiple services and business applications across various domains such as telecom, digital services, and enterprise solutions.

Key Responsibilities:

• Designed and implemented scalable backend services using Spring WebFlux and Spring Data JPA.
• Integrated real-time data streaming and messaging through Apache Kafka.
• Applied caching strategies using Redis to enhance system performance.
• Supported full-text search capabilities with Elasticsearch and Solr.
• Collaborated with frontend developers using ReactJS to ensure seamless API interaction.
• Participated in system design, performance optimization, and troubleshooting.

Technical Stack:

• Frontend: ReactJS
• Backend: Spring WebFlux, Spring Data JPA, MySQL
• Messaging & Caching: Kafka, Redis
• Search: Elasticsearch, Solr
• Tools: Git, Jira, CI/CD pipelines

Link: https://ttf.viettelpost.vn
Client: Viettel Post
Team Size: 6 members
Role: Java Developer

Description:
Contributed to building a logistics coordination platform for both domestic and international goods transportation, helping Viettel Post optimize supply chain operations and delivery management.

Key Responsibilities:

• Analyzed initial business requirements and provided feedback on system functionality and usability.
• Designed and developed new features based on evolving business needs.
• Planned and tracked project progress, ensuring delivery aligned with quality and performance standards.
• Collaborated closely with team members to maintain development consistency and meet deadlines.

Technologies: Java, Spring Boot, Kafka, RESTful APIs, postgresql, Git, Jira , Reactjs

• Frontend: ReactJS
• Backend: Spring Boot, Spring Data JPA, MySQL , Kafka
• Tools: Git, Jira

Link: https://sme.viettel.vn
Client: Viettel
Team Size: 15 members
Role: Java Developer

Description:

Participated in the development of a comprehensive digital transformation platform tailored for small and medium-sized enterprises (SMEs), aiming to streamline business operations through service integration and automation.

Key Responsibilities – Achievements:

• Developed and integrated third-party services such as vContract, MySign, POS365, EasyHRM, Emal Pro, and SSL into the platform.
• Collaborated with clients to gather, clarify, and analyze business requirements.
• Planned development tasks, monitored progress, and ensured product quality through rigorous evaluation.
• Contributed to building a highly scalable and reactive backend using Spring WebFlux.

Technical Stack:

• Backend: Java, Spring Boot, Spring WebFlux, Spring Data JPA, Kafka, MySQL, Microservices, keycloak.
• Others: RESTful APIs, Git, Jira.
• Frontend: ReactJS
• Backend: Java, Spring Boot, Spring WebFlux, Spring Data JPA, Kafka, MySQL, Microservices, keycloak.
• Messaging & Caching: Kafka, Redis
• Tools: Git, Jira

Client: (Confidential / Automotive Sector)
Team Size: 35 members
Role: Software Developer (C++)

Description:
Contributed to the development of an embedded music playback system designed for in-car entertainment platforms, ensuring smooth user interaction and reliable audio playback within automotive environments.

Key Responsibilities – Achievements:

• Developed and implemented features according to customer and product requirements.
• Participated in requirement analysis sessions with stakeholders to understand and clarify functional needs.
• Actively engaged in knowledge sharing and technical discussions within the team to improve understanding of system components and related technologies.

Technical Stack:

• Backend / Embedded Development: C++
• Others: Git, Agile/Scrum, and internal automotive frameworks.