Senior Backend Developer

freeC's Client

• Design and build scalable backend systems using Java, C#, Node.js, and modern architectural principles (OOP, DDD, REST, GraphQL, Microservices).
• Work with SQL/NoSQL databases, caching (Redis), automated testing, CI/CD pipelines, Docker, and cloud platforms (AWS, GCP, Azure).
• Collaborate across teams to define requirements, review code, and continuously improve system performance and team productivity.

Job requirement

• Min 4+ years of experience in backend development or related software engineering roles.
• Proficient in at least one backend programming language such as Java, C#, Node.js, or Python.
• Strong understanding of computer science fundamentals: OOP, SOLID principles, Clean Code, DRY, IoC and system design patterns (MVC, DDD, TDD).
• Experience working with SQL and NoSQL databases, and caching such as Redis.
• Familiarity with designing and implementing RESTful APIs, GraphQL, WebSockets, and microservices architecture.
• Hands-on experience with unit testing, integration testing, and end-to-end testing methodologies. Proficiency in using Docker, K8S and setting up CI/CD pipelines for efficient deployment workflows.
• Experience working with cloud platforms such as AWS, GCP, or Azure.
• Soft skill:
• Strong logical thinking and problem-solving mindset in complex technical contexts.
• High motivation to explore, research, and apply the latest backend trends and best practices.
• Eagerness and discipline in self-learning, with the ability to quickly grasp new technologies and concepts.

Nice to have

• 6+ of practical experience in software development, especially in backend systems.
• Experience in developing full-stack or front-end.
• Experienced in working with distributed data systems or technologies like Apache Kafka, RabbitMQ.

Soft skill:

• Having experience as a team leader is a plus.
• Open-minded and proactive in communication, with the ability to explain technical ideas clearly across teams.

• Bonus: 13th-month salary
• Bonuses for occasions such as Lunar New Year, solar calendar New Year, religious festivals, International Children's Day, and national holidays as regulated.
• Annual salary review.
• Full contribution to social, health, and unemployment insurance as regulated.
• Provided with a Macbook for work.
• 60-day probation with 100% of official salary.
• Working hours from Monday to Friday (8:30 AM - 5:30 PM), time off on Saturday, Sunday, and public holidays as regulated.
• Hybrid working model.
• Allowances for parking at the office building, lunch, travel, housing support for children under 3 years old, project, and phone.
• Annual health check-up, company trip, year-end party, monthly team building,