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OrderProcessingService.java — OpenJDK 21 Build Passing
// Enterprise Spring Boot Service with Async Streams
@Service
public class OrderProcessingService {
  private final OrderRepository repository;

  public CompletableFuture<OrderResponse> processAsync(OrderDTO dto) {
    return CompletableFuture.supplyAsync(() -> {
      dto.validate(); // SOLID Custom Validation
      return repository.save(dto.toEntity());
    });
  }
}
JUnit 5 Test Suite: 16 Tests Passed (100% Coverage) 0.042s Exec Time
REST Controller Async Service JPA / DB Non-Blocking I/O | Concurrency Throughput: 12,400 req/s
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Spring Boot REST API with JWT Authentication, Spring Data JPA & MySQL

Task: Build secure RESTful endpoints for an e-commerce platform with role-based access control (Admin/Customer), Swagger/OpenAPI documentation, and H2 test fixtures.

  • Deliverables: Maven project zip, Postman collection, OpenAPI 3.0 specs.
  • Result: 100% tests passing with 94% instruction code coverage.
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[INFO] --- maven-surefire-plugin:3.1.2:test ---
[INFO] Running com.app.AuthControllerTest
[INFO] Tests run: 12, Failures: 0, Errors: 0, Skipped: 0
[INFO] BUILD SUCCESS (Total time: 4.812 s)
Coursework Level: Advanced Data Structures

Self-Balancing AVL Tree & Red-Black Tree Implementation from Scratch

Task: Implement generic self-balancing AVL binary search tree with LL, RR, LR, and RL rotations, node balance factor maintenance, and O(log n) search/insertion guarantees without standard libraries.

  • Deliverables: AVLTree.java, comprehensive JUnit 5 test suite, complexity analysis write-up.
  • Result: O(log n) time complexity verified across 100,000 randomized insertions.
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// AVL Tree Balance Benchmark
Elements Inserted: 100,000 integers
Max Tree Height: 18 (Theoretical Bound: 20)
Search Time: 0.0003 ms per key (O(log n) Proven)
Coursework Level: Concurrent & Parallel Programming

Thread-Safe Producer-Consumer Pipeline with ReentrantLock & Semaphores

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// Stress Test Concurrency Output
Producers: 20 | Consumers: 10 | Capacity: 100
Total Items Processed: 500,000 (0 Data Loss)
Deadlock Detection: 0 Cycles Detected
Coursework Level: GUI & Software Design

JavaFX Hospital Management GUI with FXML & MVC Architecture

Task: Build an interactive desktop dashboard in JavaFX featuring FXML view bindings, TableView data manipulation, custom CSS styling, and SQLite local database persistence.

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// JavaFX Application Verification
Architecture: Model-View-Controller (FXML)
UI Rendering: Smooth 60 FPS Event Dispatching
Packaging: Standalone Cross-Platform Executable JAR
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Thread Safety & Memory Leak Prevention Deadlock-Free & Resource Closed Race Conditions & Unclosed Streams Extra Charge for Concurrency
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Starting from $30 / assignment
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REST APIs, JPA/Hibernate, JavaFX GUI, Concurrency, and advanced DSA trees/graphs.

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  • Database integration (MySQL/SQLite/Postgres)
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Microservices & Capstone

Distributed systems, Kafka event streaming, Android apps & Senior Thesis.

Custom Scope Custom / project
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Pricing starts from $30 for standard Core Java OOP, inheritance, and recursion tasks, and from $60 for Spring Boot REST microservices, multithreading pipelines, JavaFX applications, and complex DSA trees/graphs. Get an immediate free quote before paying.

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