About

Hi, I’m Belltoy. I write about programming, technology, and other topics that interest me. This blog is a place for me to share my thoughts, experiences, and knowledge with the world.

This blog is built using Astro and AstroPaper theme with some customizations.

I’m a Senior Software Engineer with 15+ years of experience building complex backend systems, distributed infrastructure, high-performance networked applications, and frontend development. I have a strong foundation in computer science, concurrency, distributed systems, system architecture, APIs, data processing, and production reliability.

And I have experience in designing and operating highly scalable and fault-tolerant systems, including globally distributed MQTT infrastructure supporting 100+ million concurrent connections. I have been working with Rust for many years, as well as Erlang/OTP, Elixir, Go, JavaScript, Python, and other languages.

I love exploring new ideas and learning new things, and I hope to share that passion with my readers.

Core Competencies

• Distributed Systems: Distributed architecture, fault tolerance, consistency, service discovery, coordination, high availability
• Backend Engineering: Complex applications, APIs, microservices, data processing, service integration
• Concurrency & Performance: Async I/O, high concurrency, backpressure, resource management, performance optimization
• System Architecture: Architecture design, API design, reusable components, architectural evolution, reliability and maintainability
• Data & Messaging: Kafka, HBase, etcd, ZooKeeper, MySQL, NoSQL, distributed data systems
• Network Programming: TCP/IP, HTTP, MQTT, RTMP, gRPC, connection management, network protocols
• Rust & Systems Programming: Rust, Tokio, Tonic, Erlang NIFs (FFI), eBPF
• Backend/Web Development: Node.js, PHP, Python, Elixir, JavaScript, TypeScript, React, Next.js, web applications
• Cloud & Infrastructure: Docker/Kubernetes, AWS, CI/CD, GitOps, observability
• Engineering Leadership: Technical mentoring, architecture reviews, engineering standards, cross-team collaboration

Some Fun Projects

chloe is a local-first long-term memory tool for coding agents such as Claude Code and Codex. Built with Rust, it lets agents save, search, and share project knowledge through MCP, with data stored locally in SQLite. It also supports hybrid full-text and vector search using local models.

I’m a big fan of Vim/Neovim and have created several plugins and tools for the community:

• tree-sitter-vrl - A tree-sitter parser for VRL, the Vector Remap Language, used in the Vector observability agent.
• vrl.vim - Vim plugin for VRL syntax highlighting and indentation.
• zed VRL support - Zed plugin for VRL syntax highlighting and indentation.

• prom.vim - Prometheus exposition format syntax for Vim/NeoVim.
• tree-sitter-prom - Prometheus’ text-based format grammar for tree-sitter

Back in 2012, I had shared some experiences about using Node.js in production. You can find the 3D presentation slides here.

Follow Me

You can find me on GitHub and Twitter / X. Feel free to reach out if you have any questions or just want to say hi!