# Jiecheng Han

> Staff SDE at Fortinet

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

I'm a technical expert with over 8 years of experience in providing complex software engineering for large scale datasets, as well as implementing data ETL pipelines, creating tools to automate and monitor pipeline and platform status. Extensive familiarity with big data tech stack, data engineering, and storage solutions. Expertise in problem-solving and resource allocation, ensuring smooth workflow and quick issue resolution.

Languages:            Java, Python, Scala, C
Web Services:       RESTful, Microservices
Frameworks:         Spring (Boot), Mybatis, Bert, Milvus
Databases:            Oracle, MySQL, MongoDB, Redis, Druid, Elasticsearch
Design Patterns:   MVC, Factory, Proxy, Singleton, Adapter, Template
SDLC:                     Agile/Scrum
Tools:                     Eclipse, IntelliJ IDEA, Git, Bash, Jenkins
Big Data:                Hadoop, Spark, Hive, NiFi, MinIO, Livy, Kafka, Looker

## Work Experience
### Principal Software Engineer @ Fortinet
Jan 2026 – Present

### Staff Software Development Engineer @ Fortinet
Jan 2021 – Present
- Design and develop FortiSIEM Application Server features to enable technology migration to Fortinet security appliance.
- Design and implement large distributed security data analysis systems running on Big Data based technologies (Elasticsearch, Clickhouse, HDFS, Spark).
- Design and implement of data service to manage data on Spark and HDFS with Lambda streaming architecture using Java and Python.
- Deliver top quality, well organized, and algorithmically sound code on time.
- Track official releases and technical documents, analyze issue reports and provide fix patches or workaround accordingly.

### Lead Software Engineer @ Mastercard
Jan 2021 – Jan 2021 | San Francisco Bay Area

### Senior Software Engineer @ Mastercard
Jan 2018 – Jan 2021 | San Francisco Bay Area
Participate in the design and implementation of a unified data acquisition and processing platform, using the platform to reform multiple data services across Mastercard.

Tasks Performed:
- Developed a distributing Merchant Location Lookup Service on near real-time transactions.
- Designed and developed an Intelligent Matching Engine for Aggregate Merchant Service. 
- Designed and developed a Rule Engine for Merchant Attributes data quality check and enhancement. 
- Built a lightweight Data Lake Platform to Support Mastercard core transaction process.
- Developed multiple pipelines for DWH ETL batch jobs, including merchant url enhancement, merchant data sets transformation to Azure Blob storage, etc.

Achievements:
-Build a modern data lake platform with on-promise object storage, make it production ready in three months.
-Developed and Tested new architecture for near real-time Merchant Location Service on transactions, made it on production in two months. This NRT Merchant Location Service provided help to Mechants business during the COVID-19 and Hurricane Laura.

Technologies Used: Java, Oracle, Hadoop, NiFi, Livy, Spark, MinIO, Hive, Bert, Milvus

### Senior System Engineer @ Tianhong Asset Management Co., Ltd.
Jan 2014 – Jan 2017 | Tianjin, China
Tasks Performed:
- Built data center framework using Hadoop, HBase, Spark and Redis
- Managed the cluster over 50 nodes over Alibaba cloud platform 
- Built Rest API and interfaces with python for the data center, support other information systems
- Built the data pipeline with python and shell scripts to transfer, process, and maintain large-scale and complex financial data (in tens of TB), sourced from RDBMS, data file, and log file
- Built model with PySpark to conduct time-series predication on the cash flow of mutual fund, linear regression on customers transaction trends,  classification customer profiles, and provided solid data support for business decisions
- Built portal with Plotly to demonstrate data analysis result

Achievements:
- Projects included Yu'ebao Data Center, as well as Transfer Agent, Office Automation, and Application Monitoring systems.


## Education
### Master's degree in Computer Science (Data Science Track)
Maharishi International University

### Master's degree in Control Theory and Control Engineering
Nankai University

### Bachelor's degree in Machine Design, Manufacturing, and Automation
Xiamen University


## Contact & Social
- LinkedIn: https://linkedin.com/in/jiecheng-han

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Source: https://flows.cv/jiechenghan
JSON Resume: https://flows.cv/jiechenghan/resume.json
Last updated: 2026-04-12