PLAYER_PROFILE.EXE - PERSONAL INFORMATION

ernestli.site

ZeKai Li (Ernest) • Software Developer
Sweden • Master's CS @ Linköping University
TECH STACK
Java Spring Next.js MySQL TypeScript React MongoDB
INFRASTRUCTURE
Docker Kubernetes AWS Microservices Jenkins GitLab CI/CD Redis
SPECIALTIES
Backend Development Full Stack Domain-Driven Design Test Automation
LANGUAGES
Chinese (Native) English (Fluent) Swedish (Basic)

PROFESSIONAL EXPERIENCE

CAREER_DATA.EXE - PROFESSIONAL EXPERIENCE LOG
system@fintech:~$ load_experience --priority=high
Leading Fintech Company (Payment Systems)
Software Engineer Intern | Payment Gateway Team
2023 - 2024 | MISSION_COMPLETE
High-Concurrency Payment Gateway: Participated in the development of a distributed payment gateway handling millions of daily transactions. Implemented idempotency mechanisms and distributed locks (Redis/Zookeeper) to ensure data consistency and prevent double-spending.
Performance Optimization: Optimized database queries and implemented multi-level caching strategies (Local + Redis), reducing average API latency by 30% and increasing throughput by 50%.
Payment Channel Integration: Collaborated with cross-functional teams to integrate multiple third-party payment channels (Alipay, WeChat Pay, UnionPay). Designed a unified payment interface adapter pattern to simplify channel switching and maintenance.
Reliability Engineering: Developed automated reconciliation scripts and monitoring alerts (Prometheus + Grafana) to detect and resolve payment discrepancies in real-time, achieving 99.99% system availability.
CAREER_DATA.EXE - PROFESSIONAL EXPERIENCE LOG
system@linkoping:~$ current_mission --status=active
Linköping University, Sweden
Master's Student | Computer Science Program
2024 - Present | MISSION_ACTIVE
Advanced Systems: Deep dive into distributed systems, software architecture & advanced algorithms
International Environment: Collaborating with diverse research teams from 20+ countries
Modern Tech Stack: Building cutting-edge projects with latest technologies & frameworks
Academic Excellence: Outstanding performance across all coursework & research projects

FEATURED PROJECTS

🏢 ENTERPRISE PROJECTS Large-scale Production Systems

InstaVerse

Enterprise-level microservices social blog platform with massive scalability. Inspired by XiaoHongShu, featuring distributed architecture, OAuth2 security, and real-time interactions.

Spring Cloud Alibaba · Microservices · High Concurrency · 22k+ TPS
Spring Boot 3.x JDK 17 Spring Cloud Alibaba MySQL 8.0 Redis 7.x Elasticsearch Nacos Gateway

Whisper - Real-time Message Distribution

🎯 MISSION: High-performance message streaming system featuring Netty-based gateway and event-driven microservices. Implements intelligent routing algorithms, multi-protocol support (WebSocket/TCP), and real-time computation for sub-millisecond latency at scale.

Real-time Computing + Message Queue + Distributed Systems
Apache Pulsar Redis Streams WebRTC Socket.IO Go gRPC NATS etcd

AreoMQ - Lightweight Message Queue

🎯 MISSION: High-throughput distributed streaming platform engineered with Raft consensus for data consistency. Features Zero-copy IO for ultra-low latency, tiered storage for infinite retention, and exactly-once processing semantics.

Real-time Processing + Event-driven Architecture + Big Data
Apache Kafka Kafka Streams Apache Flink Schema Registry ClickHouse Prometheus Grafana Kubernetes

NeuralNexus - AI RAG Platform

🎯 MISSION: Enterprise AI platform integrating LLM models with HNSW vector indexing for high-speed retrieval. Features RAG architecture with semantic caching, automated document parsing pipelines, and multi-modal inference capabilities.

AI/ML Mastery + Vector Search + Model Optimization + RAG
PyTorch LangChain FastAPI Pinecone OpenAI GPT Transformers CUDA Docker

Flux - AI Image Generation

🎯 MISSION: Advanced AI-powered image generation tool leveraging latent diffusion models. Features real-time rendering pipeline, custom LoRA fine-tuning support, and optimized inference for professional creative workflows.

AI Image Generation + Diffusion Models + Professional Tools
PyTorch CUDA Diffusion Models OpenCV PIL NumPy Transformers TensorFlow

Agora - Smart E-commerce Platform

🎯 MISSION: Build an enterprise-level e-commerce platform based on Next.js 15 + TypeScript. Adopting micro-frontend architecture, React Server Components for zero-bundle-size data fetching, and Zustand for global state management to achieve ultimate performance.

Full Stack Mastery + Performance Engineering + Type Safety
Next.js 15 TypeScript React Query Micro Frontend

🔬 TECHNICAL DEEP DIVE Research & Algorithmic Mastery

JAVAdventure

🎯 MISSION: Deep dive into Java ecosystem source code analysis. Hand-craft implementations of Spring AOP proxies, Netty Reactor pattern, and MyBatis SQL mapping to uncover the underlying principles of core frameworks.

Framework Mastery + Source Code Analysis Expertise
Spring Framework Netty MyBatis Source Analysis

Algorithm Toolkit

🎯 MISSION: Forge the ultimate collection of algorithm implementations including Graph Theory, Dynamic Programming, and Advanced Data Structures. Visualized with D3.js for intuitive understanding of complex computational problems.

Algorithm Mastery + Interview Preparation Complete
Python JavaScript D3.js TypeScript

INTERACTIVE GAME DEMOS

Experience pixel-perfect gaming projects built with modern web technologies

Strategic Phase-Shifting Puzzle Platformer
Score: 0 | Lives: 3 | Level: 1
🌙 MOON WALKER - Phase Exploration Game
WASD: Move & Low-Gravity Jump | E: Phase Shift | Q: Energy Pulse
Space: Space Jump | R: Reset Phase | F: Activate Devices
🌙 Lunar Environment | 🔄 Phase Switching | ⚡ Energy Puzzles | 🚀 Low Gravity Physics | 🌀 Teleportation | 🔮 Dimensional Exploration

ACHIEVEMENT GALLERY

Graduation Achievement
🎓 GRADUATION MASTER
Successfully completed 4-year software engineering campaign with honors! Specialization in Distributed Systems.
After countless coding sessions, debugging marathons, and project deployments, mastered the fundamentals of software engineering and high-concurrency architecture.
Experience: +2000 XP Skills: +50 Points
Travel Achievement
🌍 WORLD EXPLORER
Discovered 20+ cities across multiple continents. Epic adventure stories unlocked!
From the northern lights of Sweden to bustling European capitals, travel adventures expanded worldview and cultural understanding.
Cities: 20+ Countries: 8 Languages: Swedish +1
Tech Talk Achievement
🎤 TECH SPEAKER
First public speaking quest completed! Topic: 'Microservices Architecture Patterns'.
Stepped onto the stage and shared knowledge with fellow developers. Evolution from code consumer to knowledge creator.
Confidence: +100 Communication: +75
Music Achievement
🎸 BAND MEMBER
Former guitarist & keyboardist. Music creation abilities unlocked!
Mastered the art of creating harmony in both music and code. Creative skills enhance problem-solving and team collaboration.
Creativity: +80 Team Harmony: +60
Transformers Achievement
🤖 TRANSFORMERS EXPERT
Complete knowledge of Japanese Transformers series. Ultra Magnus pricing database included!
Encyclopedic knowledge of The Headmasters and Super-God Masterforce series, including second-hand model pricing.
Attention to Detail: +200 Passion Index: MAX