Requirements

Imagine building a system to display and compare salary information, benefits, and company reviews, similar to Glassdoor or Levels.fyi. This is a complex system with many facets. We need a flexible and maintainable architecture to accommodate future features and changes. This problem focuses on the core aspects of modeling company data, salary information, benefits packages, and user reviews, and providing mechanisms for aggregation and comparison. We will address concurrency considerations assuming a high-traffic environment. # Requirements ## Functional Requirements 1. **Company Management:** * Ability to add new companies to the system, including basic information like name, industry, and location. * Ability to update company information (name, industry, location, etc.). * Ability to search companies by name, industry, and location. * Each company has a unique identifier. 2. **Salary Data:** * Ability to add salary entries for specific roles within a company. * Each salary entry should include: * Job title * Base salary * Bonus (optional) * Stock options (optional) - number of shares, vesting schedule * Location (where the job is based) * Years of experience * Date of submission * User ID (who submitted the salary data - can be anonymous if required) * Ability to retrieve salary data for a specific company and job title. * Ability to calculate aggregate salary statistics (average, median, min, max, percentiles) for a specific company and job title, filtering by years of experience and location. 3. **Benefits Data:** * Ability to add benefits information for a specific company. * Benefits information should include details about: * Health insurance (medical, dental, vision) - including plan details * Paid time off (vacation, sick leave) * Retirement plans (401k, pension) - including matching contributions * Other perks (e.g., free food, gym membership, transportation) * Ability to retrieve benefits information for a specific company. * Allow users to rate/review the benefits offered by a company. 4. **Company Reviews:** * Ability for users to submit reviews for a specific company. * Each review should include: * Overall rating (1-5 stars) * Pros * Cons * Advice to management (optional) * Work/life balance rating * Culture rating * Senior management rating * Compensation and benefits rating * Career opportunities rating * Date of submission * User ID (who submitted the review - can be anonymous if required) * Ability to retrieve reviews for a specific company. * Ability to calculate aggregate review statistics (average overall rating, average work/life balance rating, etc.). * Implement basic moderation to remove inappropriate reviews. 5. **Comparison Features:** * Ability to compare salary data, benefits, and reviews for two or more companies, based on selected criteria (job title, location, years of experience, etc.). ## Non-Functional Requirements 1. **Thread Safety:** The system must be thread-safe to handle concurrent requests from multiple users. Consider thread-safe data structures and synchronization mechanisms where needed. 2. **Extensibility:** The system should be designed to easily accommodate new features and data types in the future (e.g., new benefit types, new review categories, internationalization). Favor composition over inheritance. 3. **Modularity:** The system should be composed of loosely coupled modules, each responsible for a specific aspect of the system (e.g., company management, salary data, benefits data, reviews). This will improve maintainability and testability. 4. **Testability:** The code should be written in a way that is easy to test, with clear separation of concerns. Use dependency injection to facilitate unit testing. 5. **Performance:** The system should be performant enough to handle a large number of requests. Pay attention to the performance of aggregate calculations and search queries. Consider in-memory caching for frequently accessed data (e.g., company information). The choice of data structures is important here. 6. **Data Validation:** Input data (salary, benefits, reviews) must be validated to ensure data quality and consistency. 7. **Security:** Prevent malicious attacks by sanitizing the user input and validating permissions for different operations. ## Core Entities 1. **Company:** Represents a company in the system. * Attributes: `companyId` (unique identifier), `name`, `industry`, `location`. * Responsibilities: Stores basic company information. 2. **Salary:** Represents a salary data point for a specific role at a company. * Attributes: `salaryId` (unique identifier), `companyId`, `jobTitle`, `baseSalary`, `bonus`, `stockOptions`, `location`, `yearsOfExperience`, `submissionDate`, `userId`. * Responsibilities: Stores salary information. 3. **Benefits:** Represents the benefits offered by a company. * Attributes: `benefitsId` (unique identifier), `companyId`, `healthInsurance`, `paidTimeOff`, `retirementPlans`, `otherPerks`. Each of these sub-attributes can be complex objects themselves. * Responsibilities: Stores benefits information. 4. **Review:** Represents a user review for a specific company. * Attributes: `reviewId` (unique identifier), `companyId`, `overallRating`, `pros`, `cons`, `adviceToManagement`, `workLifeBalanceRating`, `cultureRating`, `seniorManagementRating`, `compensationAndBenefitsRating`, `careerOpportunitiesRating`, `submissionDate`, `userId`. * Responsibilities: Stores review information. 5. **AggregateSalaryData:** Represents aggregated salary statistics for a specific company and job title. * Attributes: `companyId`, `jobTitle`, `averageSalary`, `medianSalary`, `minSalary`, `maxSalary`, `percentiles`. * Responsibilities: Stores aggregated salary statistics. This could be calculated on demand, or cached. 6. **AggregateReviewData:** Represents aggregated review statistics for a specific company. * Attributes: `companyId`, `averageOverallRating`, `averageWorkLifeBalanceRating`, etc. * Responsibilities: Stores aggregated review statistics. This could be calculated on demand, or cached. 7. **Cache:** An interface to cache aggregated data to improve performance. 8. **DataAggregator:** An interface to perform aggregate calculations like calculating average salaries or average review rating.

Design system for salary info,comparsion and other info similar to the glassdoor salary / salarry.level.

Requirements

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