Yu ZHANG (pseudoyu)
Indie Developer & Open-source Contributor
Hong Kong. Data infrastructure, developer tools, and public technical records.
01 / Identity
Technical dossier
A verifiable ledger across product engineering, distributed data systems, Web3 analytics, and self-hosted operations. Personal work is separated from project scale.
[Resume-sourced + Public evidence · 2026-08-09]
10B+
events indexed
[System scale · Resume-sourced]100K
ETL transactions / second
[System scale · Resume-sourced]50TB+
data processed
[System scale · Resume-sourced]400M+
monthly requests
[System scale · Resume-sourced]500M+
database records
[System scale · Resume-sourced]200K+
product users
[System scale · Resume-sourced]157,633
JavaGuide project stars
[Repository scale · Public evidence]45,664
RSSHub project stars
[Repository scale · Public evidence]44,901
multica project stars
[Repository scale · Public evidence]38,780
Folo project stars
[Repository scale · Public evidence]1,302
GitHub followers
[Public evidence]20+
talks & workshops
[Resume-sourced]02 / Public evidence
Open-source contributions
Curated by repository adoption and public influence, not personal PR volume. Roles and specific contributions are stated separately. [GitHub public snapshot · 2026-08-09]
One of the largest Chinese-language backend interview and systems knowledge bases, covering Java, databases, distributed systems, concurrency, system design, and AI application development.
Java · databases · distributed systems · system design · AI
157,633★ · 46,179 forks
[Repository scale]
Core maintenance spanning route metadata for Folo display, public-instance documentation, and ongoing route operations.
10M+ daily feed updates · 100M+ monthly API calls · 90%+ availability [System scale]
TypeScript · Node.js · RSS · route metadata
45,664★ · 10,101 forks
[Repository scale]
Implemented structured ticket search for the coding-agent platform and maintains its self-hosted operations workflow.
Go · coding agents · issue search · self-hosting
44,901★ · 5,705 forks
[Repository scale]
Built language, video-length, and RSSHub recommendation filters, iframe rendering support, and Markdown link rendering fixes.
TypeScript · React · RSS · content rendering
38,780★ · 2,109 forks
[Repository scale]
Added pseudoyu.com to a long-running community index of independent Chinese-language publications.
Community index · independent publishing · open web
23,753★ · 2,684 forks
[Repository scale]
Added the public pseudoyu domain configuration to a large community-operated developer subdomain registry.
DNS · community registry · developer identity
10,939★ · 26,486 forks
[Repository scale]
Fixed Backblaze S3 API compatibility in the photo-gallery stack to stabilize object-storage integration.
TypeScript · S3 · Backblaze · media storage
2,579★ · 322 forks
[Repository scale]
Designed, built, and maintains a public productivity toolbox for repeatable daily workflows.
Astro · productivity tooling · web utilities
1,551★ · 97 forks
[Repository scale]
Public contribution to a Chinese-language Go learning repository spanning fundamentals through practical implementation.
Go · technical education · examples
736★ · 88 forks
[Repository scale]
Implemented feed-agent and DSL tooling, Twitter tools, agent operations, and YAML generation support.
Agents · feed DSL · Twitter tools · YAML generation
354★ · 49 forks
[Repository scale]
Translated and maintained technical articles on Go 1.20 language changes, Go versus Rust, database connection pools, and in-memory key-value databases.
Go · technical translation · databases · language design
343★ · 68 forks
[Repository scale]
Extended the community-link surface of a high-performance terminal-style site built with Rust and WebAssembly.
Rust · WebAssembly · terminal UI
328★ · 24 forks
[Repository scale]
Added v1.0 social tags, optional protocol fields, tag-level metadata fields, and ODP terminology updates.
Open data · protocol schema · metadata · social tags
317★ · 21 forks
[Repository scale]
Added the public pseudoyu profile to a community-curated index of notable Chinese-language GitHub profiles.
Developer profiles · community curation · documentation
306★ · 67 forks
[Repository scale]
03 / Build ledger
Engineering projects
Dec 2025-present
Source type: Resume-sourced
Metric scope: System scale
Euka.ai
Backend / data engineering
Scale / metrics: TB-scale creator data
Specific work: OpenSearch hybrid keyword + vector + business reranking replaced pgvector; Postgres cursor batches and materialized views; SQS + Lambda indexing; ClickHouse analytics.
Technology: OpenSearch · PostgreSQL · ClickHouse · SQS · Lambda · Cloud Run · Terraform · Inngest
Sep-Dec 2025
Source type: Resume-sourced
Metric scope: System scale
edgeX
Infrastructure / performance engineering
Scale / metrics: 200K+ users · 20+ Rust microservices · 500M+ record database · queries +30%
Specific work: Instrumented HTTP, gRPC, and WebSocket paths with OpenTelemetry; located and resolved 10+ bottlenecks.
Technology: Rust · OpenTelemetry · gRPC · WebSocket · PostgreSQL
Mar 2023-Jul 2025
Source type: Resume-sourced
Metric scope: System scale
RSS3
Data / platform engineering
Scale / metrics: 100K TPS ETL · 10+ chains · 50TB+ · 200+ K8s pods · 30+ datasets / 20TB+ lakehouse · 20+ agents · 400M+ monthly requests
Specific work: Built and operated multi-chain ETL, lakehouse datasets, agent infrastructure, and high-volume request services.
Technology: Go · Rust · Kubernetes · lakehouse · blockchain ETL · observability
$29M raised is protocol / project scale, not an individual outcome.
Jul 2021-Mar 2023
Source type: Resume-sourced
Metric scope: Project scale
Zhigui
Engineering lead
Scale / metrics: Led 10-15 people · confirmation 2s → 800ms · release cycle 2 weeks → 5 days
Specific work: Led China Unicom and China Merchants Bank BaaS / SaaS delivery; introduced ArgoCD delivery workflow.
Technology: Blockchain · BaaS / SaaS · Kubernetes · ArgoCD
2024-present
Source type: Resume-sourced + Public evidence
Metric scope: Public personal evidence + System scale
Web3Insight
Cofounder / engineering
Scale / metrics: 393 authored commits · 7 merged PRs · TB-scale ETL · 10B+ events · 200+ ecosystems
Specific work: Built ecosystem intelligence product and data pipelines; supported China Open Source Report data analysis.
Technology: Next.js · Hono · Supabase · Rust
Amber BUIDL_QUESTS 2025 selected · KBW2025 Seoul
2025-present
Source type: Resume-sourced
Metric scope: Project scale
ShareX
Cofounder
Scale / metrics: 50K+ users · contracts 35K+ / 60K+ / 16K+ tx · gas -40% · 0 third-party audit vulnerabilities
Specific work: Built and optimized smart-contract and product systems; selected for BNBChain MVB S10.
Technology: Solidity · EVM · smart-contract security · product engineering
2026-present
Source type: Public evidence
Metric scope: Public personal evidence + Repository scale
multica
Contributor / self-hosted operator
Scale / metrics: 44,901 project stars · 5,705 forks
Specific work: Added structured ticket search and maintained a self-hosted operations workflow. No upstream ownership claim.
Technology: Go · self-hosting · agent operations
04 / Timeline
Work experience
Dec 2025-present
Euka.ai · Backend / data engineering
OpenSearch hybrid keyword + vector + business reranking replaced pgvector; Postgres cursor batches and materialized views; SQS + Lambda indexing; ClickHouse analytics.
TB-scale creator data [Source type: Resume-sourced] [Metric scope: System scale]
Sep-Dec 2025
edgeX · Infrastructure / performance engineering
Instrumented HTTP, gRPC, and WebSocket paths with OpenTelemetry; located and resolved 10+ bottlenecks.
200K+ users · 20+ Rust microservices · 500M+ record database · queries +30% [Source type: Resume-sourced] [Metric scope: System scale]
Mar 2023-Jul 2025
RSS3 · Data / platform engineering
Built and operated multi-chain ETL, lakehouse datasets, agent infrastructure, and high-volume request services.
100K TPS ETL · 10+ chains · 50TB+ · 200+ K8s pods · 30+ datasets / 20TB+ lakehouse · 20+ agents · 400M+ monthly requests [Source type: Resume-sourced] [Metric scope: System scale]
Jul 2021-Mar 2023
Zhigui · Engineering lead
Led China Unicom and China Merchants Bank BaaS / SaaS delivery; introduced ArgoCD delivery workflow.
Led 10-15 people · confirmation 2s → 800ms · release cycle 2 weeks → 5 days [Source type: Resume-sourced] [Metric scope: Project scale]
05 / Study
Education
Sep 2020-Dec 2021
The University of Hong Kong
MSc Electronic Commerce & Internet Computing · Department of Computer Science · English-medium
Sep 2015-Jun 2019
Wuhan University of Technology
BA English · GPA 3.7/4.0 (87.07/100)
Mathematical Statistics 90/100 · MATLAB 95/100 · Computer Program Design 86/100 · Calculus 5 credits
06 / Attribution
Honors, reports & competitions
07 / Public registry
Complete talks registry
18 entries in public talks registry [Public evidence]
Resume total 20+ talks / 1K+ audience [Resume-sourced]
04 · 2023-10-16
07 · 2024-08-05
08 · 2024-10-03
09 · 2024-10-07
11 · 2025-03-23
17 · 2025-04-23
08 / Published work
Public writing & output
150+ technical articles
[Resume-sourced]300K+ visits
[Resume-sourced]6K+ X + Telegram followers
[Resume-sourced]185 Chinese-language Markdown entries
[pseudoyu.com source tree]18 public talk entries
[talks.ts registry]09 / Working range
Capability matrix
Product engineering
TypeScript · React · Next.js · Node.js · product delivery
Data systems
PostgreSQL · OpenSearch · ClickHouse · ETL · lakehouse · materialized views
Distributed systems
Go · Rust · queues · indexing · microservices · high-throughput APIs
Infrastructure
Kubernetes · Docker · Terraform · Cloud Run · AWS · ArgoCD · OpenTelemetry
Web3
Solidity · EVM · multi-chain data · contract optimization · security
Public practice
Open source · technical writing · talks · self-hosted operations