Back-end Developer

Trách nhiệm công việc Develop and maintain backend systems for gamifications. Design, build, and optimize APIs and server systems to handle millions of daily requests Integrate backend services such as authentication, payment, leaderboard, chat, matchmaking, and in-game events. Collaborate closely with frontend/game client teams to ensure performance and player experience Optimize server performance, scalability, and high concurrency handling. Write technical documentation and follow software development processes (code review, CI/CD) Kỹ năng & Chuyên môn At least 1 year of experience for Junior level, or 3+ years of experience for Middle level. Proficient in one of: Node.js (Fastify), Go (Fiber), or Java. Experience with API gateway tools: Kong, KrakenD, or Express Gateway. Knowledge of real-time communication: Socket.IO, NATS, MQTT, or Redis pub-sub. Familiarity with microservice frameworks: NestJS or Go (microservices). Experience with authentication & authorization: Keycloak (OpenID) + JWT. EducationDegreeBachelor in Computer Science, Information TechnologyCertificationPhúc lợi dành cho bạnCompetitive salaryIncluding 13th-month salary and holiday bonuses (e.g., 10% salary on national holidays).Annual leaves: 14 days/yearMacbook providedAnnual medical checkQuy trình phỏng vấnVòng 1CV screenningVòng 2Technical leader Interview