Sothaninn Sieng

Lead Software Engineer

With an appetite for the unknown and an instinct to connect the dots.

Hi, I’m Ninn, a Lead Software Engineer at Olympic Collectible AI Solutions (OCAIS).

More about me
PLAYER PROFILE

Engineering focus: full-stack delivery, data quality, and reliability.

BASED IN THE SEATTLE AREA · BUILDING AT OCAIS

MS in Computer Science · Seattle University · 2025

Another engineer, another portfolio? Fair. Let’s make this worth your while.

INDUSTRY & SPONSORED WORKOCAISGoogle / TCG capstoneBilimetrix USACostco Wholesale

TODAY

Leading engineers. Delivering outcomes.

From client needs to shipped products.

Public ecommerce website

Repacks Marketplace

Project owner · Engineering team lead

Lead system design and development for Gradient’s marketplace, connecting shopping, collections, inventory, and fulfillment. My deepest work is payment orchestration: coordinating Stripe, wallets, and Odoo with explicit recovery when a transaction only partly completes.

Tech stack:Next.jsReactPythonFastAPIPostgreSQLStripeAWS ECSTerraformPytestPlaywright
My work on Repacks Marketplace Visit gradient.cards (opens in a new tab)

Internal review & operations tool

VerifAI

Project owner · Engineering team lead

Designed how review workflows, permissions, background processing, and data stores work together in VerifAI. I lead the platform’s development for AI card identification and image-quality review across a dataset of 2.5M+ entries.

Tech stack:ReactVitePythonFastAPIPostgreSQLMongoDBAWS EC2AWS S3DockerPytest
My work on VerifAI

Now that I have your attention, time for the origin story. Those results didn’t come with the job title. Here’s how I earned both.

EXPERIENCE

My engineering experience

Across industries, one focus: built to work. Built to last.

  1. Current roleJun 2026–present

    Lead Software Engineer

    Olympic Collectible AI Solutions (OCAIS)

  2. Software Engineer

    May 2025–Jun 2026
  3. Software Engineer Intern

    Oct 2024–May 2025
  • Repacks Marketplace

    Built shopping, collection, payment, and fulfillment workflows across the stack.

    Tech stack:Next.jsReactPythonFastAPIPostgreSQLStripeAWS ECSTerraformPytestPlaywright
  • VerifAI

    Built review, correction, and auditing tools that put people in control of AI results.

    Tech stack:ReactVitePythonFastAPIPostgreSQLMongoDBAWS EC2AWS S3DockerPytest
  • Dataset Quantifier · Software Engineer Intern

    Reduced image-processing time from 3s to 0.1s per image during my internship. Built dataset-analysis and model evaluation tools, contributing to a 20% improvement in model accuracy.

    Tech stack:PythonPandasImage processingModel evaluationMultiprocessingGPU computing
SEP 2024 — MAR 2025

Software Engineering Capstone

Sponsored by Google & Trusted Computing Group

  • TPM Fuzz Testing Pipeline

    Contributed to the design of a Go/Docker TPM fuzz-testing pipeline. Independently authored a research handoff evaluating Markov-chain command sequencing and byte-level input mutation, with a roadmap for software and physical TPM testing.

    Tech stack:GoDockerFuzz testingSecurity researchTechnical writing
JUN — AUG 2024

Software Engineer Intern

Bilimetrix USA

  • Healthcare Image Search & Analysis

    Increased quantified images by 10% through color-detection algorithms, alongside accessible image search and C# unit testing for neonatal healthcare software.

    Tech stack:C#ASP.NETRazor PagesUnit testing
JAN — MAR 2024

Site Reliability Engineer Intern

Costco Wholesale

  • SRE Workflow Automation & Monitoring

    Automated an SRE intake workflow that increased submissions by 60%, alongside dashboards for monitoring critical services.

    Tech stack:Power BIPower AppsPower AutomateAzure DevOps

Still wondering if I’m the right fit? I’ve got a few more projects up my sleeve.

Projects

OCAIS backend engineering

Pricing Data Pipeline

Built pricing APIs and Redis Streams workers with retryable processing, pending-job recovery, and PostgreSQL-backed pricing history.

Tech stack:PythonFastAPIPostgreSQLRedis StreamsBackground jobs

Team project

AI products & clickstream analytics

Won first place with a team AI-services website in a computer science student-organized competition at Seattle University. Built its text-analysis interface and upload-to-API integration.

Tech stack:Next.jsJavaScriptREST APIsAWS API GatewayAWS Comprehend

Full-stack academic project

Date Planner

Built Angular venue browsing and review workflows, connected Express/MongoDB APIs, and added HTTP integration tests with Mocha and Chai.

Tech stack:AngularTypeScriptNode.jsExpressMongoDBMochaChai

SDI Engineering-sponsored capstone

GearSim

Built aircraft landing-gear simulation software in C++ and Qt, applying object-oriented design and delivering through weekly stakeholder sprints.

Tech stack:C++QtObject-oriented designScrum
More projects in systems, databases, and software design

Team software testing project

Chess Engine Test Suite

Added C# xUnit tests for move generation, chess notation, position serialization, and game export in an existing chess engine.

Tech stack:C#xUnitUnit testing

Full-stack academic project

Gardening Essentials Ecommerce

Connected a React storefront and administrator interfaces to Express/MongoDB product APIs, including cart updates when products are removed.

Tech stack:ReactNode.jsExpressMongoDB

Academic project

Distributed asynchronous routing

Built a four-node distributed routing simulation using asynchronous message exchange, routing tables, and delayed-packet handling.

Tech stack:PythonNetworkingDistributed systemsAsynchronous messaging

OCAIS hardware simulation prototype

Sixpicker Camera & Scanner Simulation

Built a hardware simulation mode and unit tests for a multithreaded Python capture system, making camera and scanner workflows testable with fixture images.

Tech stack:PythonHardware simulationMultithreaded systemsDependency injectionunittest

Web application project

Document Editor

Built document creation, editing, and management with Express, EJS, and MySQL using a clear MVC architecture.

Tech stack:ExpressEJSMySQLREST APIsMVC

Object-oriented coursework simulation

Grocery Management System

Built a Java console simulation of grocery-store inventory and customer/employee behavior using interfaces, composition, and dependency injection.

Tech stack:JavaObject-oriented designInterfacesDependency injection

Networking project

HTTP Web Proxy

Applied networking fundamentals to a Python HTTP proxy with TCP sockets, local caching, and explicit server-error handling.

Tech stack:PythonSocketsTCP/IPHTTPCaching

Database project

Social Network Database

Designed relational data and queries for social interactions, connecting SQL procedures with PHP and HTML.

Tech stack:SQLPHPHTMLDatabase design

WHAT’S NEXT

Your toughest problem could be
my next favorite project.

Full-stack development · Cloud infrastructure · Workflow automation · Engineering leadership

Email Ninn