Jianjun Wang

AI Agent Engineer · Evaluation · Backend Systems

Backend Development Intern @ Tencent · Data Science @ Shenzhen Technology University

I build agents that use tools, produce verifiable results, and fit into real workflows.

Tencent Current: Tencent · Previously: Kuaishou & Bananain

Contributing to

Project	Area	About	Merged
Nushell	Rust · shell	A new type of shell — pipelines for structured data on every platform	5
Apache OpenDAL	Rust · storage	Data access layer that frees users from vendor lock-in	1
MCP Rust SDK	Rust · agent transport	Official Rust SDK for the Model Context Protocol	1

7 pull requests merged upstream in October 2026. All contributions

Merged pull requests

Nushell #19345 — reject command and alias names that the parser reads as numbers.
Nushell docs #2276 — zh-CN book translations, examples, and links.
Nushell #19348 — experimental dc-glob traverses explicit relative paths.
Nushell docs #2274 — add missing zh-CN book chapters.
Nushell #19309 — dc-glob honors negated character classes.
Apache OpenDAL #8429 — aborting a lazy Fs writer no longer truncates or creates the target file.
MCP Rust SDK #1382 — streamable HTTP matches explicit media types and Accept quality values.

When	Role	Focus
Oct 2026–present	Tencent · Backend Development Intern	Monitoring data services: ingestion, analytical queries, usage metering, and data consistency.
Aug–Oct 2026	Kuaishou · Agent Development Intern	Design-agent evaluation, structured Figma editing, MCP integration, and failure diagnosis.
Mar–Sep 2026	RepoMind · Tencent × SZTU industry project	Coding-agent trace analysis and evaluation, code retrieval, and incremental indexing.
Mar–Jul 2026	Bananain · AI Application Engineer	AIGC visual workflows, design plugins, and enterprise agent integrations.

Evidence-based resume editing, 20 LaTeX templates, a visual editor with real PDF previews, and content/layout checks.

A local-first MCP runtime that shares structured memory and retrieval across AI tools.

Product-image-based compliance research with source-linked findings and exportable evidence.

Languages: Go · Rust · Python · TypeScript · SQL
Agent & data: MCP · RAG (BM25 + FAISS hybrid) · evaluation and regression harnesses · trace analysis · tree-sitter / AST · FastAPI · MySQL · Redis · ClickHouse
Delivery: React · TypeScript · Figma · Adobe UXP · Playwright · pytest · Docker · GitHub Actions