Backend Engineer

We are looking for a skilled and execution-driven Backend Engineer to design, build, and scale core backend services powering AllScales business. This role requires strong backend engineering fundamentals, hands-on experience with production systems, and the ability to work in high-performance, scalable environments.

Responsibilities

• Design, develop, and maintain core backend services, including API design, business logic implementation, and system optimization.
• Build high-performance and scalable backend services using Python (FastAPI, Django, Flask) or Go (Gin, Echo, Fiber).
• Participate in database schema design, optimization, and maintenance using relational databases (MySQL, PostgreSQL) and NoSQL solutions (MongoDB, etc.) where appropriate.
• Write and maintain clear API documentation, unit tests, and integration tests to ensure system stability and long-term maintainability.
• Analyze system performance and address challenges related to high concurrency, high availability, and scalability.
• Contribute to backend architecture design and refactoring, promoting microservices, modularity, and standardization.
• Collaborate closely with frontend, product, QA, and DevOps teams to deliver features with high quality and on schedule.
• Troubleshoot, debug, and resolve production issues to ensure system reliability and uptime.

Requirements

• Bachelors degree in Computer Science or a related field is preferred.
• 3+ years of hands-on backend development experience in production environments.
• Strong proficiency in Python or Go; experience with both is a plus.
• Practical experience with backend frameworks:
• Python: FastAPI, Django, Flask
• Go: Gin, Echo, Fiber, or similar
• Solid knowledge of relational databases (MySQL, PostgreSQL), strong SQL skills, and experience with query optimization.
• Experience working with caching systems such as Redis, including understanding common caching challenges (cache penetration, breakdown, avalanche).
• Familiarity with distributed system concepts: microservices, message queues (Kafka, RabbitMQ, RocketMQ), task queues, and idempotency design.
• Basic Linux operation skills and familiarity with Docker, Kubernetes, and CI/CD pipelines.
• Strong coding standards, attention to testing and documentation, and a systematic problem-solving approach.

Nice to Have

• Hands-on experience with high-concurrency, high-availability, and large-scale data systems.
• Experience with microservices governance, including service discovery, circuit breaking, rate limiting, and observability (logging, monitoring, tracing).
• Experience leading or deeply contributing to the design and implementation of complex systems from 0 to 1.
• Open-source contributions, technical blogging, or public speaking experience.