Pengliang Liu
Technical Director · Full Stack Architect · AI/Search/Distributed
11 Years Exp · Microservices / High Availability / Hybrid Cloud DevOps
RAG Intelligent Dialogue · Vector Search · High Concurrency & Performance
Highlights & Strengths
0→1 / 1→100 Full Stack Leadership
Technical Director / Full Stack Architect, leading product roadmap, budget, efficiency, and delivery across toC/toB/toG.
Enterprise Dialogue & Search
Leading RAG intelligent dialogue, multi-modal retrieval, recall/ranking strategies, mastering Prompt, Routing, and Vector Governance.
ES + Milvus Combined Index
Building multi-layer indexing for massive docs/images, covering intra-doc, strategy, full-library retrieval, and low-latency routing.
Microservices · Multi-Active Resilience
Expert in Spring Boot/Golang + OpenResty + K8s, high availability multi-active, tracing, and capacity planning.
Performance & Resilience
OpenResty peak clipping, Redis caching, RabbitMQ/Kafka decoupling, supporting flash sale traffic and 400G DDoS protection.
Observability & Security
Building CI/CD, CMDB, Zabbix/Grafana/ES logs, WAF/Bastion/SQL Audit, forming an observability closed loop.
10-50 People Org Building
Building cross-functional teams from 0, responsible for hiring, performance, process standards, and engineering efficiency.
Work Experience
Hangzhou Weilan Sports Tech
Technical Director · Sports/Plagiarism Check/Cross-border
Shanghai Lianyin Network Group
Full Stack Architect · R&D/Ops/Big Data
Hangzhou Taoyou Tech
Technical Director · Golang/Java Multi-stack
Hangzhou Tianzuan Network
Tech Lead · Tiaotiaozhu Series
Horgos Tuomei Entertainment
PHP R&D Engineer · Earning/Chess/Gem Planet
Hangzhou Weilan Sports Tech · Technical Director
Led Sports SaaS, Plagiarism Check, and Cross-border lines. Managed full lifecycle from prototype & budget to engineering governance & O&M.
- Managed roadmaps for Moment Sports, Xiehe Check, Mydesign (toC/toG), overseeing requirements, budget, and delivery.
- Built Microservices (Spring Boot/Nacos/Redis/MQ/ES) with gateway governance and observability.
- Architected Hybrid Cloud (AliCloud+IDC) with OpenResty canary, CI/CD, and full monitoring stack.
- Led DevOps & Standards, handling core backend/frontend dev for stable 0-1-100 growth.
- Partnered with toB/toG clients on solutions, prototypes, and training, fostering cross-dept collaboration.
Coordinated Sports, Check, and Cross-border product lines, personally leading budget breakdown, hiring, and engineering governance, closing the 0-1-100 lifecycle loop.
Keywords: Microservice Gov · Hybrid Cloud DevOps · Cross-functional TeamShanghai Lianyin Network Group · Full Stack Architect
Independently led the architecture upgrade of Pangxie Account Trading Network 1.0, balancing business refactoring, security defense, and multi-team collaboration, supporting full-link expansion of Trading, IM, and Search.
- Independently refactored Pangxie Account Trading Network, splitting monolith into Spring Boot + OpenResty + Vue multi-module architecture, supporting 8x business growth.
- Built search and async links based on Canal Binlog + Elasticsearch + RabbitMQ, reducing RT by 80% after cold/hot data governance.
- Planned CI/CD, Git flow, security strategies, resisting 600GB DDoS + 15G CC attacks, safeguarding account assets and keys.
- Sorted out component libraries, IM architecture, task scheduling standards, establishing cross-team metrics and shared platforms.
- Coordinated R&D resource scheduling for 3 lines (100+ people), defining milestones/metrics, driving parallel iteration of business lines.
Single-handedly refactored Pangxie 1.0 architecture, building cross-region multi-active system and async search links, reducing RT by 80%, and resisting 600GB attacks via security strategies.
Keywords: Search Refactoring · HA Multi-Active · Security DefenseHangzhou Taoyou Tech · Technical Director
Responsible for architecture and delivery of 50W DAU toC platform and multiple e-commerce projects, driving systemic migration from PHP to Java/Golang and automated O&M system.
- Led 30-48 person multi-stack team, migrating Juxiangyou core modules from PHP to Java/Golang, decoupling user/finance/script services.
- Designed Gin + gRPC + Nacos + Kafka microservices system, OpenResty + Redis + Golang building flash sale/rate limiting, withstanding max 400G DDoS.
- Built docker-compose unified env, GitLab Runner automated release, WAF/Bastion/SQL Audit, perfecting security and O&M closed loop.
- Delivered Juxiangyou, Quandoumai businesses, establishing code standards, monitoring alarms, performance stress testing, and emergency plans.
- Promoted canary release, quality metrics, Bug SLA, and training system, ensuring controllable parallel multi-project delivery.
Led 30+ team completing systemic refactoring from PHP to Java/Golang, building flash-sale gateway and full-link automation, withstanding max 400G DDoS.
Keywords: Multi-stack Collab · High Concurrency Gov · Automated O&MHangzhou Tianzuan Network · Tech Lead
Led small team to complete Tiaotiaozhu PC/H5 0-1 and subsequent iterations, focusing on hybrid architecture, low-cost expansion, and high-frequency activity delivery.
- Self-developed Tiaotiaozhu PC/H5 hybrid architecture: ThinkPHP + OpenResty + Golang + Redis, balancing rapid iteration and high performance.
- Implemented docker-compose automated O&M, supporting low-cost expansion and multi-env consistency.
- Responsible for troubleshooting, 3rd-party SDK integration, performance tuning, and team plan/performance/code review management.
- Ensured efficient stable delivery for small team via Redis activity gameplay, log monitoring, and automated release.
- Led GitLab Runner, log visualization, automated alarm construction, improving delivery transparency.
Small team completed Tiaotiaozhu multi-terminal launch, hybrid architecture balancing efficiency and performance, and creating ultra-low cost expansion via docker-compose.
Keywords: Small Team Ops · Hybrid Arch · Automated ExpansionHorgos Tuomei Entertainment · PHP R&D Engineer
Responsible for backend dev and maintenance of Chess, Mining, Web Games business lines, independently completing activity gameplay to high-concurrency revenue calculation.
- Responsible for PHP backend of Earning/Gem Planet/Chess, independently completing Chess module 0-1 design and multiple rounds of activity operations.
- Built 70W DAU mining task queue with Redis + RabbitMQ, covering cold/hot user revenue calculation and risk control strategies.
- Maintained Cocos game backend and backend component management, shortening activity launch cycle and improving stability.
- Accumulated script system, log tracing, and async decoupling experience, providing reusable components for subsequent projects.
- Built task scheduling, revenue monitoring, and anomaly warning tools, supporting million-level revenue billing.
Accumulated 70W DAU mining service and chess activity gameplay, utilizing Redis + MQ to complete cold/hot tiering and real-time revenue settlement.
Keywords: Game Backend · High Active Task Queue · Componentized OpsKey Projects
Moment Sports · MiniApp/H5/APP
Technical Director · SaaS Event Trading Platform
PUMC Info Institute
Technical Director · Paper/Image Plagiarism Check
Mydesign Cross-border Site
Technical Director · Cross-border E-commerce
Pangxie Game Account Trading
Full Stack Architect · Multi-Active HA Retrofit
Moment Sports · WeChat MiniApp / H5 / APP
Built Event SaaS from 0-1, covering registration, settlement, merchant devices, clubs, ensuring consistent experience across terminals and high-concurrency transactions.
- For event organizers and clubs, broke down user/account/event/device domains, building Spring Boot 2.7 + MyBatis-Plus + Redis + MQ architecture.
- Built Nacos config center, merchant printer/event registration/settlement core modules, achieving multi-tenancy and permission isolation.
- OpenResty canary, CI/CD, Zabbix/Grafana/ES logs ensured delivery; MySQL sharding + Redis + MQ compensation supported high-concurrency transactions.
- Formed 15-person cross-functional team, defining R&D process, code standards, test/security standards, implementing agile rolling iteration.
- Designed member, event points, settlement closed loop, linking merchant printers and POS, achieving offline/online sync.
Full-link SaaS for event organizers, leveraging microservices + OpenResty canary to ensure multi-terminal consistency and stable transactions.
Pitch: Event Trading High Concurrency · DevOps Monitoring Closed LoopPUMC Info Institute · Paper/Image Plagiarism Check
Multi-modal plagiarism check system for research/gov scenarios, meeting intranet compliance, massive vector retrieval, and low-cost compute strategies.
- For toG research scenarios, delivered prototype, schedule, budget, covering similarity analysis of papers, images, and medical data.
- Deployed MySQL, Redis, RabbitMQ, Milvus, CLIP/DINOv2/ResNet50 algo clusters in intranet, completing security isolation and O&M strategies.
- Implemented global PDF parsing, 5 million small image vector indexing, recall/ranking/reranking strategies, reducing compute costs via control platform.
- Organized solution reviews, delivery demos, training, and acceptance, accumulating deployment docs, monitoring metrics, and emergency plans.
- Established data classification, permission audit, offline/real-time sync strategies, meeting security requirements of universities/research institutes.
Gov-Industry-Academia check platform, deploying Milvus + CLIP/DINOv2, supporting 5 million image vectors and global PDF retrieval, meeting intranet compliance.
Pitch: toG Security Delivery · Large-scale Vector RetrievalMydesign Cross-border E-commerce Independent Site
Responsible for cross-border independent site from prototype to overseas growth, unifying multi-site, exchange rates/taxes, recommendation algos, and automated O&M.
- Co-created product prototype and roadmap with stakeholders, using agile rolling iteration to cover product, transaction, marketing full links.
- Built Spring Boot + AWS ECS + Redis + RabbitMQ architecture, constructing cross-border data sync, task orchestration, and link acceleration.
- Handled exchange rates/taxes/time zones/languages differences, creating multi-site config, offline/real-time sync, and cost monitoring.
- Implemented personalized search & recommendation, first-screen optimization, and monitoring alarms, supporting overseas growth and operational decisions.
- Built AWS IaC, distributed caching, and link observability panels, ensuring stable cross-border access and controllable costs.
"Overseas Control Center" for cross-border independent site, unifying exchange rates, taxes, languages, and logistics, with AWS automation and personalized smart recommendations.
Pitch: Cross-border Data Sync · Personalized Search RecsPangxie Game Account Trading Network
Re-engineered infrastructure for account trading platform, covering gateway, search, IM, async links, and security strategies, supporting 8x business growth.
- Independently completed 1.0 architecture refactoring, OpenResty Gateway + Spring Boot Services + Vue Component Library, forming multi-env HA system.
- Built search/async links and cold/hot data governance via Canal + ES + RabbitMQ, supporting 8x business growth.
- Refactored Customer Service IM Client/Server and Message Service, improving session capacity, risk control, and audit capabilities.
- Formulated multi-person collaboration, CI/CD, security strategies, and key management, safeguarding account trading and asset security.
- Implemented observability data panels for CS, Risk Control, Settlement services, supporting 7x24 O&M.
Account trading infrastructure re-engineering, Distributed IM + Search Links + Async Decoupling, supporting 8x growth and strengthening key & security governance.
Pitch: OpenResty Gateway · Search+MQ Decoupling · Business DoublingOpen Source Projects
AI Paper Plagiarism Check
Batch upload detection for PDFs and images, supporting intra-doc, strategy, and full-library checks. Integrates SIFT/SURF for image similarity, implementing 3-level expert review and auto-generated reports.
Captcha-Pic
Golang puzzle captcha, supporting HTML embed and API, used in high-concurrency risk control and verification scenarios.
Laradock Fork & Dev
Extended OpenResty WAF, VeryNginx, Golang, Python, GitLab Runner, Filebeat images, building a production-ready container base.
webCron
Golang + Beego based Web crontab, providing permission control, fuzzy task search, termination, and email notifications.
Visit my GitHub for more
Architecture Gallery
Distributed Architecture Case (2019)
Early toC platform distributed evolution, showing service splitting, caching layer, monitoring, and data links.
HA Distributed Physical Topology (2022)
Multi-region, multi-cluster physical deployment, covering IDC + Cloud hybrid, gateway layer, and security zones.
HA Distributed Logical Topology (2022)
Logical service view of traffic governance, data sync, observability, and DevOps processes.
Tech Stack & Scenarios
11+ years in toC/toB/toG tracks, specializing in breaking down complex business into observable, iterable, scalable engineering systems, covering Backend, AI/RAG, Distributed Arch, and DevOps.
- Target Roles Technical Director / R&D Lead / Full Stack Architect
- Target Business High Concurrency Trading, AI Retrieval, Cross-border/Overseas, SaaS/Platform Projects
- Core Scenarios Microservice Refactoring · Multi-Active DR · RAG/Search Systems · DevOps/SRE · Team Building
Multi-Active Arch · Elastic Gov
Spring Boot 2.x/3.x, OpenResty, DDD/CQRS, API Standards; Hybrid Cloud, Multi-Active, Capacity Planning, Tracing & Governance.
RAG · Multi-modal Retrieval · Recs
Milvus, ElasticSearch/OpenSearch, CLIP/DINOv2/ResNet, Vector Gov; Recall-Rank-Rerank, PDF/Image Parsing, Low-cost Compute.
Java · Golang · Python · PHP
Spring Boot, Gin, Hyperf, ThinkPHP, Laravel; gRPC/REST, BFF, Service Decoupling & Gateway Gov, covering toC/toB/toG core business.
MySQL · Redis · MQ · Canal
Sharding, R/W Splitting, Binlog CDC, Cold/Hot Data Gov; Redis Sentinel/Cluster, Canal + ES Sync, RabbitMQ/Kafka Async Decoupling.
Vue · React · TypeScript
Vue2/3, React, TS, Vite, SSR/SSG, Component Lib Gov, BFF Collab; Supporting toC Frontend & Admin/Ops Visualization.
MiniApp · UniApp · Flutter
WeChat/Alipay MiniApps, UniApp/Flutter Hybrid, H5/APP Isomorphic, Client-Cloud Security & Performance Tuning, supporting Sports/E-commerce/SaaS.
OpenResty · Docker · K8S · Observability
CI/CD, GitLab Runner, Ansible, Terraform, Prometheus/Zabbix/Grafana/ES Logs, OpenResty Canary/Gov, SLO/SLA System.
Technical Articles
