Back-end Lead

Position: Back-end Lead & IoT Platform Architect
Working Location: Remote/Part-time
Contact to: Tuyen dung Vietsol (recruitment@vietsol.com.vn)

1. Role Objective
Lead the development of Vietsol’s common IoT platform for fleet management, AI cameras and smart factory solutions. The role combines hands-on Back end development, ownership of scalable Backend/IoT architecture capable of managing large numbers of devices, real-time data and AI events.

2. Key Responsibilities

Platform and system architecture

• Design the end-to-end architecture covering edge devices, IoT gateways, cloud backend,data platform, APIs and web applications.
• Build a scalable, high-availability platform designed to support millions of devices and concurrent connections.
• Define common platform services including device management, telemetry, alerts, digital twin/device shadow, OTA, user management, subscription and reporting.
• Define multi-tenant architecture, data partitioning, retention, disaster recovery and system observability.
• Make key technical decisions and manage platform technical debt.

Backend and IoT development

• Design and develop microservices, APIs and real-time processing services.
• Develop MQTT architecture covering topic design, QoS, sessions, device status, authentication and broker clustering.
• Build event-driven pipelines using Kafka/RabbitMQ, Redis and stream-processing technologies.
• Design databases for telemetry, GPS, events, images and operational data.
• Integrate GPS devices, vehicle gateways, AI cameras, PLCs, sensors and third party systems.
• Support protocols such as MQTT, HTTP/REST, WebSocket, TCP/IP, Modbus, CAN gateway, RTSP and ONVIF.
• Implement device provisioning, certificate management, OTA and secure communication.

Cloud, DevOps and security

• Work with DevOps to implement Docker, Kubernetes, CI/CD, autoscaling and cloud deployment.
• Establish monitoring, logging, tracing, alerting and performance testing.
• Ensure cybersecurity, data privacy, access control and secure device lifecycle management.
• Plan system capacity, cloud cost and service-level objectives.

Team and product development

• Build and develop the Full-stack, Backend and Frontend engineering teams.
• Translate business and customer use cases into platform architecture and product roadmaps.
• Work with Product, AI, Embedded, DevOps, QA and Project Management teams.
• Participate in technical discussions, estimations and solution presentations to customers.

3. Required Qualifications

• At least 7 years of software development experience, including experience as Technical Lead or Architect.
  Strong hands-on experience in modern frontend technologies such as Angular or React.
• Strong backend experience with Java/Spring Boot, .NET, Node.js or Go.
• Practical experience designing distributed, real-time or high-traffic systems.
• Strong knowledge of MQTT, WebSocket, REST APIs, message brokers and eventdriven architecture.
• Experience with Kafka/RabbitMQ, Redis, SQL, NoSQL and time-series databases.
• Experience with microservices, Docker, Kubernetes and AWS/Azure/GCP.
• Understanding of database partitioning, horizontal scaling, caching, load balancing and fault tolerance.
• Ability to lead engineers, conduct architecture reviews and maintain engineering standards.
• Good English communication skills.

4. Preferred Qualifications

• Experience with fleet management, telematics, logistics, IoT or connected-vehicle platforms.
• Experience with AI camera systems, RTSP, ONVIF, WebRTC, video metadata or object storage.
• Experience managing hundreds of thousands or millions of devices/messages.
• Knowledge of device provisioning, PKI, OTA and IoT cybersecurity.
• Experience with geospatial data, PostGIS, map visualization and route processing.
• Familiarity with industrial protocols, edge computing and smart factory systems.

5. Initial Performance Expectations

• Complete the current platform architecture assessment and scalability roadmap within the first 60 days.
• Establish technical standards, code-review practices and a clear Frontend/Backend team structure.
• Define the common IoT platform architecture for Fleet, AI Camera and SmartFactory products.
  Demonstrate platform capacity through measurable load and performance testing.
• Improve system reliability, release quality and development productivity.
• Build and mentor a capable product engineering team with clear technical ownership.

6. Role Allocation

• 50%: Backend and IoT platform architecture/development.
• 25%: Frontend leadership and architecture.
• 15%: Team development and technical governance.
• 10%: Product planning and customer solution support.

8.Benefit:

• Good salary (includes base salary, additional salary, housing allowance, meal allowance, etc.)
• 13th month salary + Incentive/performance bonus
• Salary review twice a year
• Lunch monthly support
• 12 annual leave days plus 1 birthday leave
• Health care insurance
• Training & career development program
• Oversea working opportunities
• Working in international environment with experts around the world
• Opportunities for career advancement to Team Leader, Group Leader, and Manager positions
• Monthly budget for team activities, etc.