Sam – Spring Boot, Java, MySQL

Backend services for Walmart's Creative Platform, enabling sellers to create, manage, and deliver digital advertisements across multiple advertising channels.

• Led the integration of TikTok ad support across distributed Creative Platform and Creative API services, enabling ingestion, validation, and rendering of TikTok-specific ad formats and metadata.
• Architected and deployed a Subscribe feature within the Creative API, enabling advertisers to programmatically apply subscribe-and-save defaults.
• Engineered image compositing capabilities within the Creative API, achieving UI parity and enabling dynamic multi-layer image and text ad rendering at scale.
• Integrated platform notification services with a centralized AdTech notification center, improving cross-application communication consistency and user experience.
• Modernized backend services to Java 25 and Spring Boot 3, using AI-assisted development tooling to accelerate refactoring, dependency upgrades, and migration debugging while maintaining a low-downtime rollout.
• Mentored junior engineers through API design and rollout.

A Leetcode-style platform to help developers prepare for software interviews.

• Architected a Python and Flask RESTful backend with 28+ endpoints and ORM functionality via SQLAlchemy to query a MySQL database of algorithm questions.
• Utilized Docker to develop an in-house Remote Code Execution service that safely executed user code with multi-language support.
• Migrated the entire application to Akamai (formerly Linode) Cloud running on nginx with DNS/SSL support, ensuring high uptime.
• Incorporated 50+ technical questions with boilerplate code and unit tests to run user code against via the in-house Remote Code Execution service.
• Integrated the Python and Flask backend with Stripe to support monthly and yearly premium memberships and membership cancellation flows.

The modernization of legacy systems into a new microservices architecture.

• Developed new microservices in .NET Core using C# to process incoming payments to third-party vendors.
• Updated 3 existing microservices to automate and modernize the manual process of importing payments into the system.
• Maintained an SSIS program that processed medical claims payments.
• Reduced manual approval effort by writing SQL stored procedures to automate $0 payment approvals.

Internal applications used by firmware integration technicians.

• Rebuilt the company’s firmware testing environment, redesigning the testing architecture to enable communication with test systems via one web service.
• Minimized the codebase by over 50%.