YUHAN.OS

MODULE 03 / SYSTEM

Technical
foundations.

A clear record of programming foundations and verified technical capabilities across data, real-time systems, automation, architecture, and reliability work.

YUHAN.OSTECHNICAL
FOUNDATIONS

Languages

Tools & Platforms

Technical Foundations

LANGUAGES

Programming languages currently listed across coursework and technical experience.

JavaCPythonJavaScript
JavaScript was applied to autonomous and teleoperated robot control in FTC competition work.

TOOLS & PLATFORMS

Core tools used to support programming, coursework, project organization, and documentation.

GitVS CodeIntelliJ IDEAMicrosoft Office Suite
Git, VS Code, IntelliJ IDEA, and Microsoft Office Suite form the current working toolkit.

FOUNDATIONS

Computer-science concepts that guide the approach to programming and practical problem-solving.

Object-Oriented ProgrammingData Structures & AlgorithmsFTC Robotics Programming
Applied FTC work reinforces iterative testing, debugging, control logic, and cross-team collaboration.

DATA & PERSISTENCE

Relational data foundations verified through implemented persistence, schema, and repository work.

PostgreSQLSQL
Built with explicit database configuration, migrations, transactions, and query-backed repository patterns.

AI & REALTIME

Real-time AI integrations that pair model responses with constrained structured data.

OpenAI APIsOpenAI RealtimeStructured Outputs
Uses structured schemas and asynchronous request handling to keep model output within application-owned contracts.

INTEGRATION & AUTOMATION

Backend interfaces and browser-driven workflows for connecting systems and inspecting live DOM state.

HTTP APIsWebSocketsWebhooksTwilioBrowser AutomationDOM Parsing
Implemented HTTP and event-based integrations alongside Playwright locator, DOM evaluation, and webhook validation work.

ARCHITECTURE

Explicit state and event boundaries for workflows that coordinate multiple asynchronous steps.

State MachinesEvent-Driven ArchitectureAsync WorkflowsSession ManagementWorkflow Orchestration
Uses reducers, session-scoped coordination, and bounded async work to keep workflow transitions deliberate and traceable.

RELIABILITY & TESTING

Validation, observability, recovery, and test practices for dependable system behavior.

pytestRegression TestingIntegration TestingDeterministic ValidationStructured LoggingLatency InstrumentationFailure RecoveryStale Event ProtectionFail-Closed Validation
Covers pytest-based regression and integration testing, structured telemetry, timing measurement, stale-event rejection, and fail-closed checks.

APPLIED TECHNICAL WORK

FTC Robotics Autonomous System

Implemented autonomous and teleoperated control programs in JavaScript, collaborating with hardware and design teammates while testing and debugging robot logic for FIRST Tech Challenge competitions.

CURRENT TOOLKIT

  • LanguagesJava · C · Python · JavaScript
  • Tools & platformsGit · VS Code · IntelliJ IDEA · Microsoft Office Suite
  • FoundationsObject-Oriented Programming · Data Structures & Algorithms · FTC Robotics Programming
  • SystemsData · AI & realtime · integrations · automation · reliability