# Stephen Pu

> Staff Software Engineer/ Software Architecture

Location: San Francisco Bay Area, United States
Profile: https://flows.cv/stephenpu

- C/C++, Python, Go language, shell, Bash Programming，Linux, Unix OS development
- SPDK, DPDK, PMDK.
- Ceph, MinIO, DAOS, NVMe-oF, iSCSI, NAS, SAN, NFS, CIFS, S3, HDFS, EC (Erasure Code).
- RDMA, Metadata Store, KV store, LevelDB, RocksDB, SplinterDB, bluestore, RADOS, RGW, quorum.
- Cloud SQL database
- Cache Tiering, Memory zero-copy, Run-to-completion
- CPU core affinity, NUMA, Memory Hugepages，OS kernel bypass, EC affinity.
- Network zero-copy, InfiniBand, RoCE v2 (RDMA over Ethernet).
- gRPC, Libfabric
- Probability, Statistics, Data Wrangling, Machine Learning, Deep Learning, Data Mining, Data Visualization.
- Hadoop, Spark, Kafaka, Kubernetes, Docker, container and cloud-native technologies.
- TCP/IP, UDP, ARP/RARP, DHCP, DNS, STP, VLAN, OSPF, BGP, IGMP.
- vLLM, KV Cache, SGLang

## Work Experience
### Staff Software Engineer @ Alluxio
Jan 2025 – Present | San Francisco Bay Area
Development of distributed cache acceleration, data caching algorithms, data consistency algorithms, and distributed cluster consensus algorithms.
Design and development of KV Cache systems.

### Principal Software Engineer / Software Architecture / Team Lead @ Hewlett Packard Enterprise
Jan 2018 – Jan 2025
Products:
-	HPE Alletra Series Storage products.
-	HPE GreenLake for Block, File, and Object Storage, and cloud SQL database.
Jobs:
-	Architected, designed (Levels 1 to 4), and developed the software platform for HPE  Alletra Storage products.
-	Designed and developed the Data Engine, including the data path, metadata path, RDMA network layer, and data redundancy mechanisms (Erasure Coding and Replication), ensuring data resilience.
-	Designed and implemented storage protocol layers: NVMe-oF and iSCSI (Block Storage), NFS and CIFS (File Storage) for HPC networks, and S3 (Object Storage).
-	Designed and developed a cloud SQL database by integrating SQL and storage data paths, data sharding, and metadata. Built a sequential append-only log-structured storage system with strong transactional consistency and high performance.
-	Architected and designed the platform for high-performance, scalable, reliable, and cloud-ready HPE storage products (STaaS).
Key contributes:
1)	Delivered an industry-leading high-performance system
2)	Enabled Storage-as-a-Service (STaaS) functionality through the HPE GreenLake platform.

### Data Scientist / Senior Software Engineer @ Fortinet
Jan 2013 – Jan 2018 | Ottawa, Ontario, Canada
Products:
FortiMail    - An Email Security-as-a-Service (SaaS) cloud product. FortiGuard - An AI-powered security cloud service.
Jobs:
-	Designed and developed AI models for email security analysis.
-	Led the design, development, and implementation of 4 core backend systems:
1)	Data Collection: Email extraction, log data extraction, threat analytics, security factors extraction, and converting unstructured data into structured formats.
2)	Data Cleaning: Addressed major errors, removed duplicates, handled missing values, outliers, and irrelevant data, and filled significant data gaps.
3)	Data Analysis: Conducted training, prescriptive, diagnostic, and predictive analysis. Evaluated analysis accuracy and iteratively improved training models.
4)	Designed and developed a scalable and efficient cloud system architecture
Key contributes:
-	Delivered industry-leading accuracy, recognized as #1 by Virus Bulletin (VBSpam).
-	Achieved superior convergence times in the cloud system, ensuring high performance and reliability.

### Senior Software Engineer / Team Lead @ IBM
Jan 2009 – Jan 2013 | San Jose, California, United States
Products:
-	IBM BladeCenter RackSwitch series products (Layer 2-7)
-	IBM BladeCenter Top-of-rack Ethernet Blade Switch products
Jobs:
-	Direct design, development and implementation of switch storage data switching, STP and SNMP modules
-	Designed and developed virtualization layer
Key contributes:
-	Achieved exceptional system performance and operational efficiency.
-	Delivered advanced virtualization features, enhancing enterprise capabilities.

### Software Developer @ Siemens
Jan 2005 – Jan 2009
Products:
-	SIEMENS HiPath 8000, 5000, 3000 series products
Jobs:
-	Designed and developed switch core layers:
1)	Protocol layer: Implemented the SIP layer for session initiation and call handling.
2)	Network layer: Engineered IP network initialization, routing, processing, and quality control mechanisms.
Key contributes:
-	Delivered superior voice quality through advanced quality control measures.


## Education
### Master's degree in Computer Science
Stanford University


## Contact & Social
- LinkedIn: https://linkedin.com/in/stephen-pu-ab389269

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Source: https://flows.cv/stephenpu
JSON Resume: https://flows.cv/stephenpu/resume.json
Last updated: 2026-04-01