Runyu Ding
Lexington
Summary
Results-driven mid-level Software Engineer with a strong focus on backend development and API design and proven record of implementing high-performance solutions, leading technical projects and mentoring junior engineers.
Overview
5
5
years of professional experience
Work History
Software Engineer II
Alma
New York
04.2023 - Current
- Software Engineer II — Apr 2025–Present
- Software Engineer I — Apr 2023–Apr 2025
- Refactored and scaled reconciliation jobs to handle ~200K claims/day while reducing backlog.
- Migrated claims submission and reconciliation workflows to new claim-processing vendors (Change, Availity), ensuring continuity during the Change Healthcare outage.
- Led technical design and delivery of integrations (e.g., Anatomy paper check vendor) to accelerate reconciliation and prevent expired checks.
- Built and shipped backend features (Django REST endpoints, Celery cron/batch jobs) with robust testing, documentation, and operational support.
- Mentored two entry-level backend engineers through onboarding and first-ticket delivery.
Software Engineer I
Paciolan
Irvine
06.2021 - 11.2022
- Implemented new features and maintained backend microservices for ticket delivery services by using AWS technologies such as (DynamoDB, Serverless Lambdas, S3 Buckets and SQS), Kafka, Docker, terraform and Kubernetes.
- Thoroughly tested, documented and logged applications for different ticketing use cases and client needs (through unit, component, integration and end to end testing) by cooperating with QA Engineer and other developers
- Perform code reviews, CI/CD maintenance, and configuration file changes for Kubernetes and terraform
- Provided live support and debugging for any production issues when on-call on a rotational schedule
Software Engineer I
Paypal
San Jose
11.2020 - 05.2021
- Implemented a HealthCheck module as a part of a library to support health check for backend payment processing servers.
- Implemented and thoroughly tested APIs to support different card, bank and 3D secure transaction flows for different use cases as a multi-tenant, cross-geo project
- Perform code reviews, codebase maintenance, and other user stories in biweekly sprints as a part of scrum team
Skills
- Backend development
- API design
- Python development (Django, Celery)
- AWS technologies
- Agile methodologies
- Database management (SQL, NoSQL)
- CI/CD pipelines
- Testing frameworks
- JavaScript frameworks (Nodejs, Express)
- Docker
Education
Bachelor of Science in Engineering in Computer Science, University of Michigan, Ann Arbor, MI
Sept. 2016 - Aug. 2020
Course Highlights:
Mobile Application Development, Cryptography, Software Engineering, Operating System, Database Management Systems, Computer Security, Web Systems, Machine Learning
Personal Projects
My Django Site
- A blog website implemented using Django framework, vanilla JS, and CSS, which allows users to post their blogs, comment on each other's blogs and store blogs to read for later.
- Repo: https://github.com/runyud/my_django_site.git
ticketStore Ecommerce App
- A full stack Spring MVC Ecommerce App for online ticket shopping website, with admin portal for creating and managing resources for the website.
- Repo for the main application: https://github.com/runyud/ticketStore
- Repo for the admin portal: https://github.com/runyud/ticketAdminPortal
Studymates Matching App
- Worked with two other teammates to develop a web app that automatically matches pairs of study partners together based on location and availability preferences through email notifications
- Demo Video: https://drive.google.com/file/d/1ZoRJi6y4slpmpbeNwKpL6D4UpSDt2ERN/view?usp=sharing
- Link to the source code: https://github.com/runyud/studymates
Timeline
Software Engineer II
Alma
04.2023 - Current
Software Engineer I
Paciolan
06.2021 - 11.2022
Software Engineer I
Paypal
11.2020 - 05.2021