Backend / systems engineer focused on Go, Java, distributed systems, RPC infrastructure, and performance-oriented engineering.

• Building reliable backend services and developer tooling
• Strong interest in distributed systems, storage, networking, and performance
• Packaging engineering experience into reusable starters, middleware, checklists, and notes

• Backend engineering with Go / Java
• Infrastructure and RPC-oriented system design
• Reusable backend assets, engineering notes, and selective developer-experience improvements
• Practical, implementation-first problem solving grounded in CS fundamentals

• go-service-starter — minimal production-minded Go HTTP service starter with structured logging, health endpoints, and graceful shutdown
• go-http-middleware-kit — reusable net/http middleware for request IDs, real IP extraction, structured logs, panic recovery, and timeouts
• backend-engineer-checklist — practical backend engineer checklist covering Go, Java, distributed systems, databases, networking, observability, and delivery
• system-design-checklist — practical system design checklist for interviews, architecture reviews, and distributed-systems tradeoff discussions
• HRpc — Java / Netty based RPC framework learning project covering custom protocol design, service registry, dynamic proxy invocation, heartbeats, reconnect, and client-side load balancing
• Resume — responsive résumé / portfolio template with 161+ stars
• Blog — technical notes on backend engineering, Java/Go, and CS topics

• go-service-starter — a lightweight Go service starter aimed at real backend service scaffolding instead of throwaway demos
• go-http-middleware-kit — a focused middleware pack for the boring-but-important HTTP concerns every backend service eventually needs
• backend-engineer-checklist — a shareable backend engineering roadmap/checklist designed for self-study, onboarding, and interview prep
• system-design-checklist — a concise system design framework for interviews, design docs, and architecture reviews
• HRpc — a Java / Netty RPC framework learning project that makes registry, transport, retry, and load-balancing internals visible
• Iterating on reusable assets that are actually useful to backend engineers, not just toy demos

Merged

• docker/docs#25462 — clarified that the Ubuntu noble base-image example is version-specific and should be adjusted for the release being imported
• rclone/rclone#9559 — clarified copyto command documentation with maintainer-aligned wording

Selected recent PRs

Code / behavior fixes

• urfave/cli#2379 — prevent v2 shell completion after -- from accidentally executing command actions, with regression coverage
• go-chi/chi#1120 — fix Host-based routing in RouteHeaders by using Request.Host, plus tests and doc updates
• hashicorp/go-retryablehttp#288 — preserve the final HTTP response in PassthroughErrorHandler so http.Client / StandardClient() callers do not silently lose it on retry exhaustion
• Built and shipped go-http-middleware-kit — a small Go middleware library for request IDs, logging, panic recovery, real IP extraction, and timeouts

Docs / developer experience

• prometheus/client_golang#2034 — add an OTLP bridge tutorial for exporting existing Prometheus instrumentation through OpenTelemetry
• open-telemetry/opentelemetry-go#8527 — document supported SDK environment variables across resource, trace, metric, and log package docs
• docker/docs#25464 — add a legacy Docker Desktop Mac troubleshoot alias and fix the related docs-site redirect/build edge case
• github/docs#45002 — add SHA pinning notes to OIDC workflow examples across AWS, Azure, GCP, Vault, and PyPI docs

Contribution focus

• Small but real behavior fixes, API correctness, developer experience, and selective documentation where implementation ambiguity causes real user error
• Recent work spans urfave/cli, go-chi, Prometheus client_golang, OpenTelemetry, Docker Docs, and GitHub Docs

Languages:      Go, Java, C/C++, SQL
Interests:      Backend engineering, RPC, distributed systems, storage, networking
Strengths:      CS fundamentals, hands-on implementation, reusable engineering assets
Open to:        Backend / infrastructure / systems engineering opportunities

If my open-source work, reusable templates, code contributions, or engineering assets save you time, you can support me directly.

• Support page: happysnaker.github.io/support
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• Common support amounts: ¥9.9 / ¥19.9 / ¥49.9 / ¥99 — any amount helps
• Async profile/repo polish: ¥99 for one public GitHub profile / README / repo positioning / resume-site pass; ¥199 for a bundled GitHub profile + one repo README + one resume-site packaging pass
• Sponsor a build: if you want me to keep shipping backend starter kits, middleware, checklists, and open-source fixes, direct support helps fund that work
• If a repo helped your interview prep, design review, or implementation work, small direct support is especially appreciated.

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• Email: happysnaker@foxmail.com
• Resume site: happysnaker.github.io/Resume
• Blog: happysnaker.github.io