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

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!