Danny Xu’s Resume

Senior Golang Engineer | Backend Developer | Blockchain Developer

Perth, Australia, Remote

dannyxuweb3@gmail.com

PROFESSIONAL SUMMARY

Seasoned Software Engineer with 10+ years of experience specializing in building high-performance, scalable systems using Golang. Proven track record in developing low-latency trading and payment platforms, microservices architecture, and cloud-native applications. Expertise in designing fault-tolerant systems with a focus on optimizing performance and throughput.

TECHNICAL SKILLS

• Languages: Golang (6+ years), Python, JavaScript, PHP
• Blockchain and Web3:
  • Smart Contract Development and Auditing: Solidity, Hardhat, Foundry, OpenZeppelin
  • Node and Execution Layer: Geth, Nethermind, Reth (understand), Erigon (understand)
  • Consensus and Data Layer: Ethereum PoS, Rollups (Optimistic/ZK), Layer 2 Infrastructure Principles
  • MEV Ecosystem: Flashbots, Proposer-Builder Separation (PBS), Blockchain Construction and Auction Mechanism
  • Wallets and Signatures: Web3.js, Ethers.js, Private Key Management, EIP-712 Signatures
  • Data Indexing and Querying: The Graph, SubQuery, JSON-RPC, Ethereum Event Monitoring
  • Decentralized Storage and Messaging: IPFS, Filecoin, Libp2p, Whisper (understand)
  • Cryptography and Security: Merkle Tree, Zero-Knowledge Proofs (ZK-SNARKs) Basic concepts), multi-party computing (MPC), TEE (understanding)
• Frameworks: Gin, Gorilla, Gorm, Xorm, Kratos, Zap
• Protocols: gRPC, Protobuf, WebSocket, HTTP/2, TCP/UDP
• Databases: MySQL, Redis, MongoDB, Etcd, Memcache
• Cloud: AWS, Kubernetes, Docker, CI/CD
• OS: Linux (CentOS, Ubuntu), Shell scripting
• Tools: Gitlab Runner, SonarQube, Trivy, Jenkins
• Monitoring: Prometheus, Grafana, ELK Stack, Jaeger
• Concepts: Microservices, Distributed Systems, Fault Tolerance, High Availability

PROFESSIONAL EXPERIENCE

BLOCKCHAIN TRANSACTION DEVELOPER

BitStorage Ltd. | Oct 2024 - Aug 2025

• Developed an OTC trading system based on the Go language, with core functions including trade matching, fund custody, and wealth management products.
• Independently designed and implemented the order service, supporting trade listings, order matching, and fee settlement, ensuring stability under high concurrency.
• Wrote and deployed the escrow contract (Solidity), implementing logic for fund deposits and withdrawals, interest distribution, and commission collection, and interacting with the Go server.
• Build a local transaction ledger, responsible for synchronizing and reconciling on chain and off-chain transaction status, ensuring transaction data consistency and traceability.
• Participated in the implementation of a multi-level commission sharing system and wealth management product module, supporting automatic profit distribution and statistics.
• Completed contract testing, deployment, and on-chain interaction using tools such as Hardhat, Ethers.js, and Go-Ethereum.

Backend Software Engineer

Didi Infinite Technology Development Co. LTD | Beijing, China | Dec 2020 - Feb 2023

Led a team to develop high-throughput payment and enterprise account systems handling millions of transactions daily.

• Financial Transaction Platform: Designed and implemented a decoupled payment system with architecture patterns applicable to trading platforms—emphasizing transaction integrity, real-time processing, and integration with multiple financial channels
• High-Concurrency Financial System: Engineered an enterprise account system using sub-accounts and message queues to solve hot account problems—a pattern applicable to high-frequency trading systems—significantly improving transaction concurrency and reliability
• Real-time Transaction Processing: Built robust notification mechanisms using delayed message queues to ensure transaction status stability
• Data Monitoring System: Developed a real-time monitoring system based on MySQL binlog that processed millions of data points daily for instant analytics
• Cross-Service Tracing: Implemented distributed tracing with header-rId and spanId tags to link upstream and downstream service relationships
• Technical Leadership: Conducted training and technology promotion for microservices, Kubernetes, Docker, and Golang

Technologies used: Golang, Kubernetes, Docker, MySQL, DDMQ, Microservices

Backend Software Engineer

Meituan Dianping (Dianping Welife Technology Co. Ltd) | Beijing, China | May 2017 - Dec 2020

Led the transformation from monolithic applications to microservices architecture and developed high-performance systems.

• Microservices Transformation: Migrated legacy monolithic applications to Kubernetes-based multi-service architecture
• High-Performance WebSocket System: Designed and developed a real-time ordering system supporting 1M+ concurrent WebSocket connections across 240 pods with only 30 computing units
• Cloud-Edge Communication: Built a store proxy httpclient connecting public cloud to private cloud services using WebSocket for persistent connections
• Dynamic Service Discovery: Implemented OpenRESTY+LUA and etcd-based service discovery for dynamic upstream selection
• Auto-scaling Infrastructure: Configured Kubernetes HPA based on Prometheus metrics to dynamically scale pods according to real-time QPS
• CI/CD Pipeline: Established GitLab CI/CD workflows to improve development efficiency and release cadence

Technologies used: Golang, WebSocket, Redis, Kubernetes, OpenRESTY, LUA, etcd, Prometheus

Backend/Frontend Software Engineer

Qihoo Technology Co. Ltd | Beijing, China | Jul 2014 - Apr 2017

Designed and developed high-throughput data processing systems and customer-facing applications.

• User-Tag System: Built an ElasticSearch-based system handling custom queries across millions of membership tags
• Parallel Processing: Implemented MQ-based parallel labeling tasks with dynamic scaling of consumer instances
• Performance Optimization: Designed data layer separation for hot/cold data access patterns and implemented CDN strategies for static resources

Technologies used: PHP, ElasticSearch, Message Queues, Kubernetes HPA

Backend/Frontend Software Engineer

Scidata Information Technology Co. Ltd | Beijing, China | Aug 2011 - Jul 2014

Core developer for large-scale distributed storage systems deployed at national department level.

• Network Storage System: Designed and developed NAS combining FTP, WebDAV, Samba, NFS, AFP with LDAP authentication
• Distributed Storage: Created a distributed cluster NAS system deployed across 400+ servers in a single cluster
• Multi-language Development: Implemented system components using C/C++, PHP, Python, Java, and Shell scripts

Technologies used: C/C++, PHP, Python, Java, Shell, MySQL

EDUCATION

• Curtin University

  Master of Computing (Computer Science Major)

• Beijing Institute of Technology

  Bachelor’s Degree in Computer Science