Profile
Experience
M.Sc. Computer Science new graduate focused on backend engineering and cloud-native systems.
Backend engineer with hands-on experience in Java Spring Boot microservices, AWS services, and DevOps automation.
Education
Academic background and focus areas.
M.Sc. in Computer Science
University of Ottawa
Ottawa, Canada
- Focus on distributed systems, cloud computing, and applied machine learning.
- Capstone work on wearable and radar-based physiological monitoring.
- Grade: A.
B.Eng. in Computer Science
Hunan Normal University
Changsha, China
- Strong foundation in systems design, data structures, and backend development.
- Coursework in programming languages, algorithms, and database systems.
- Grade: 88.05/100.
Work Experience
Industry roles and impact.
Software Development Engineer Intern
Invision Inc.
Toronto, ON, Canada - Remote
Backend engineer for Financial Pulse, a social-style financial tracking platform on AWS.
- Implemented Spring Boot microservices and RESTful APIs for post publishing, following, and personalized feeds.
- Designed request/response DTOs and PostgreSQL schemas for account and content services.
- Added SQS + Lambda async processing for notifications and analytics, cutting write API latency ~40% in staging tests.
- Helped build CI/CD with GitHub Actions and AWS CloudFormation for dev, staging, and prod.
- Secured APIs with Spring Security (JWT) and documented endpoints via Swagger/OpenAPI.
Publications
Selected papers and preprints.
Phenotype Matching: RF Sensor-Based Indoor Subject Identification with Wearable Sensor Assistance
2025Int Conf IEEE Eng Med Biol Soc. 2025 Jul
Zixiong Han, Li(Daniel) Tian, co-authors
Guided by Prof. Miodrag Bolic · IEEE EMBS 2025
View publicationProjects
Deeper dives into selected builds.
Financial Pulse - High-Availability News Platform
May 2025 - Aug 2025Owned end-to-end delivery of a secure, high-availability news platform built on AWS.
- Scaled backend infrastructure (EC2, S3, Aurora) to support 500K users and 10M+ posts.
- Built an event-driven backend with SQS and Lambda for high-throughput async processing.
- Designed and secured RESTful APIs with API Gateway and Spring Security (OAuth2/JWT).
- Automated CI/CD with GitHub Actions and managed IaC via CloudFormation.
Embedded Wearable & Radar-Based Physiological Monitoring System
Sep 2024 - Jan 2025Capstone project on real-time physiological signal acquisition and human activity recognition.
- Collected synchronized PPG and accelerometer data at 250 Hz on MAXREFDES104.
- Built a binary parsing tool for near real-time streaming and CSV conversion.
- Optimized Go Direct Respiration Belt stack for USB and BLE data acquisition.
- Deployed a mmWave activity recognition system on Jetson Orin NX.
High-Availability E-commerce Platform
Dec 2022 - May 2023A microservices-based e-commerce system focused on scalability and fault isolation.
- Built 10+ Spring Cloud services with clear domain separation and horizontal scaling.
- Used RabbitMQ and Redisson distributed locks to reduce flash-sale latency from ~2s to ~200ms.
- Integrated Elasticsearch to improve product search and ranking performance.
- Containerized services with Docker for consistent local and staging environments.