The Interview Loop
Recruiter Screen (30 min)
Standard fit check, behavioral questions, and resume overview.
Technical Loop (3-4 Rounds)
Deep dive into domain knowledge, coding, and system design.
Interview Question Bank
Frontend Engineer
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Behavioral
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medium
Trust is Salesforce's number one core value. Tell me about a time you discovered a security vulnerability or data leak in your frontend code and how you handled it.
#Security
#Integrity
#Communication
Frontend Engineer
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Behavioral
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medium
Tell me about a time you had to push back on a Product Manager or Designer because a requested feature would severely impact frontend performance.
#Communication
#Conflict Resolution
#Performance
Frontend Engineer
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Behavioral
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medium
Tell me about a time you had to dive into a large, undocumented legacy codebase to fix a critical bug.
#Debugging
#Legacy Code
#Resilience
Frontend Engineer
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Behavioral
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easy
Customer Success is a core value at Salesforce. Describe a time you went above and beyond to ensure a customer or end-user had a successful experience with your product.
#Customer Success
#Empathy
#Ownership
Frontend Engineer
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Behavioral
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medium
Tell me about a time you disagreed with a senior engineer's technical design. How did you handle it?
#Conflict Resolution
#Communication
#Teamwork
Frontend Engineer
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Behavioral
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easy
Salesforce values continuous learning. Tell me about a recent frontend technology, API, or standard you learned and how you applied it to a project.
#Continuous Learning
#Passion for Tech
#Adaptability
Frontend Engineer
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Coding
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medium
Implement a custom `Promise.all()` function from scratch.
#JavaScript
#Asynchronous Programming
#Promises
Frontend Engineer
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Coding
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medium
Write a function to flatten a deeply nested JavaScript object, joining keys with a dot (e.g., `a.b.c`).
#JavaScript
#Recursion
#Data Structures
Frontend Engineer
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Coding
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medium
Implement a custom Event Emitter class with `on`, `off`, `emit`, and `once` methods.
#JavaScript
#Design Patterns
#Object-Oriented Programming
Frontend Engineer
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Coding
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hard
Write a function to deep clone a JavaScript object. Ensure it handles circular references gracefully.
#JavaScript
#Recursion
#Memory Management
Frontend Engineer
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Coding
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easy
Implement a debounce function that takes a function and a delay, and returns a debounced version of the function.
#JavaScript
#Closures
#Timing
Frontend Engineer
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Coding
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medium
Write a polyfill for `Array.prototype.reduce()`.
#JavaScript
#Array Methods
#Polyfills
Frontend Engineer
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Coding
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medium
Given a DOM tree and a target element, write a function to find the corresponding element in an identical, cloned DOM tree.
#DOM Manipulation
#Tree Traversal
Frontend Engineer
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Coding
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hard
Write a function that takes a string of HTML and returns a sanitized version, removing any `<script>` tags or inline `on*` event handlers to prevent XSS.
#JavaScript
#Security
#String Manipulation
#DOM
Frontend Engineer
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Coding
•
medium
Implement a custom `bind()` function in JavaScript.
#JavaScript
#Functions
#Context
Frontend Engineer
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Coding
•
easy
Write a function to determine if two DOM elements are colliding (overlapping) on the screen.
#DOM
#Geometry
#JavaScript
Frontend Engineer
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Coding
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hard
Implement a function that takes an array of asynchronous tasks (functions returning promises) and executes them with a maximum concurrency limit.
#JavaScript
#Concurrency
#Promises
Frontend Engineer
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Coding
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easy
Write a function to convert a string containing a CSS class name into a camelCase JavaScript property name (e.g., `background-color` to `backgroundColor`).
#JavaScript
#String Manipulation
#Regex
Frontend Engineer
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System Design
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hard
Design a highly scalable Data Grid component, similar to the Salesforce List View. It needs to support infinite scrolling, inline editing, and sorting.
#Component Architecture
#Virtualization
#State Management
#Performance
Frontend Engineer
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System Design
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medium
Design an Autocomplete / Typeahead search component similar to Salesforce Global Search.
#Network Optimization
#Debouncing
#Caching
#Accessibility
Frontend Engineer
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System Design
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hard
Design a Kanban board interface, similar to the Salesforce Opportunity Pipeline view. Users should be able to drag and drop cards between columns.
#Drag and Drop
#State Management
#Optimistic UI
#Component Architecture
Frontend Engineer
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System Design
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medium
Design a real-time Notification Center for a CRM application.
#WebSockets
#Server-Sent Events
#State Management
#UI/UX
Frontend Engineer
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System Design
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medium
Design a multi-step wizard form for creating a new Salesforce Account. It includes validation, file uploads, and conditional steps.
#Form Management
#State Management
#Validation
Frontend Engineer
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System Design
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hard
Design an offline-first mobile web experience for field sales representatives to log visits and update records without internet access.
#Service Workers
#IndexedDB
#Offline First
#Syncing
Frontend Engineer
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System Design
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hard
Design a rich text editor component that allows users to format text, insert images, and mention other users (@mentions).
#ContentEditable
#State Management
#UI Components
Frontend Engineer
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System Design
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hard
Design a Calendar / Scheduling component where users can view, create, and drag-and-drop meetings.
#Date/Time Manipulation
#Grid Layout
#Drag and Drop
Frontend Engineer
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System Design
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medium
Design a chat widget that sits at the bottom right of the screen, supporting real-time messaging, typing indicators, and read receipts.
#WebSockets
#UI Layout
#State Management
Frontend Engineer
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Technical
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medium
Explain the concept of Shadow DOM. How does it benefit component-based architectures like Salesforce's Lightning Web Components (LWC)?
#DOM
#Web Components
#Encapsulation
Frontend Engineer
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Technical
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medium
How do you ensure a complex, interactive UI component is fully accessible (WCAG compliant)?
#a11y
#ARIA
#Keyboard Navigation
Frontend Engineer
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Technical
•
medium
Explain the JavaScript Event Loop. What is the difference between macrotasks and microtasks?
#JavaScript
#Event Loop
#Concurrency
Frontend Engineer
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Technical
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hard
What strategies would you use to optimize the Core Web Vitals (LCP, FID/INP, CLS) of a large Single Page Application?
#Core Web Vitals
#Optimization
#Networking
Frontend Engineer
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Technical
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medium
How do you manage state in a large-scale frontend application? Compare Context API, Redux, and component-level state.
#State Management
#React
#Architecture
Frontend Engineer
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Technical
•
medium
Explain Cross-Origin Resource Sharing (CORS). How does the browser handle preflight requests?
#Networking
#Security
#HTTP
Frontend Engineer
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Technical
•
medium
What is CSS Specificity and how is it calculated? How do you architect CSS to avoid specificity wars in a large team?
#CSS
#Architecture
Frontend Engineer
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Technical
•
hard
How does browser rendering work? Describe the critical rendering path from HTML response to pixels on the screen.
#Browsers
#Rendering
#Performance
Difficulty Radar
Based on recent AI-sourced data.
Meet Your Interviewers
The "Standard" Interviewer
Senior EngineerFocuses on core competencies, system constraints, and clear communication.
SimulateUnwritten Rules
Think Out Loud
Always explain your thought process before writing code or drawing architecture.