Lead/Senior Software Engineer, Zalo
Full-time
🤖 What you will do
- Design and maintain high-performance microservices for large-scale data storage, focusing on ultra-low latency and high throughput.
- Help shape the direction of features like metadata indexing, object lifecycles, and multi-region replication.
- Analyze system bottlenecks (disk I/O, network saturation) and improve service quality through better concurrency models and resource management.
- Produce maintainable and well-tested code with understanding how your code interacts with the hardware.
- Integrate secure coding practices and handle complex authentication layers (like AWS SigV4)
👾 What you will need
- 5+ years of professional experience with a focus on backend systems; should have a deep mastery of Go, C++, or Java.
- Proven experience with async IO, high-throughput networking (gRPC, HTTP/2/3), and under-the-hood optimizations (epoll, zero-copy).
- Understand Linux kernel, memory management, and disk I/O effect on database-driven applications.
- Professional experience using AWS S3 or other object stores; understand buckets, prefixes, and basic IAM/Bucket policies from a developer's perspective.
- Experience with NoSQL or distributed databases and a strong understanding of schema design for performance.
Preferred Qualifications
- Familiarity with storage engines or distributed filesystems (e.g., MinIO, Ceph, SeaweedFS, or HDFS).
- Knowledge of consensus protocols (Raft/Paxos), replication strategies (Quorum, Erasure Coding), or CAP theorem trade-offs.
- Experience building RESTful APIs that follow strict compatibility standards (e.g., S3-compatible layers).
- Experience using Prometheus/Grafana or similar tools to debug complex distributed systems.
