Stripe Software Engineer Onsite Coding Questions

Implement a system to manage users' email subscriptions. Requirements: 1. Implement functionality to add users to a subscription list. 2. Implement functionality to remove users from the subscription

The Stripe VO interview experience was great. The questions were all based on real-world payment and transaction scenarios, which really tested the ability to abstract and optimize practical problems.

I have tech programming, bug bash and integration rounds(really anxious for these last rounds :( ) Any suggestions on how/what to focus/prepare on? Thanks in advance!

VO Rounds 5 The following content requires a score of 200 or higher. You can already view it. Programming: Email sub-question, an old question. The guy from abc was very nice. He spent the first 15 mi

Ledger System Design ## What We Need to Build We need to design a ledger service for a payment platform. This service tracks money for merchants (online business owners). When a platform processes p

**Phone Screen** Solved two parts. In the second part, identified a missing edge case and explained the fix verbally before time expired. Successfully cleared this round. **Round 1: Programming Exerci

**Invoice Reconciliation** **Problem Statement** Businesses frequently receive standalone payments that must be reconciled with open customer invoices. The objective is to develop a program that match

I have my stripe virtual onsie interview scheduled next week. It will be having two rounds coding exercise and bug squash. I chose the language as python, can anyone give me tips how to prepare for it

Hi, I have a stripe virtual onsite interview cmg up. This is for a New grad position. What to expect and how to prepare for this round? They said I’ll have a bug squash and integration round. Any sugg

Finished my last interview (30 minute HM chat) with Stripe recently for a new grad position in the US. Does anyone know the response time after that? Also a review of my onsite and HM rounds. Don't ta

LeetCode #1169: Invalid Transactions. Difficulty: Medium. Topics: Array, Hash Table, String, Sorting. Asked at Stripe in the last 6 months.

LeetCode #2303: Calculate Amount Paid in Taxes. Difficulty: Easy. Topics: Array, Simulation. Asked at Stripe in the last 6 months.

LeetCode #2043: Simple Bank System. Difficulty: Medium. Topics: Array, Hash Table, Design, Simulation. Asked at Stripe in the last 6 months.

LeetCode #1604: Alert Using Same Key-Card Three or More Times in a One Hour Period. Difficulty: Medium. Topics: Array, Hash Table, String, Sorting. Asked at Stripe in the last 6 months.

## Problem Build a reusable `Accordion` component in vanilla JavaScript (or React). Each section has a header and collapsible content. Only one section can be open at a time. Clicking an open header collapses it. **Requirements:** - Toggle open/closed state on header click. - Only one panel open at a time (single-expand mode). - Keyboard accessible: Enter/Space opens/closes; Arrow keys navigate between headers. - Animate expand/collapse with CSS transitions on `max-height`. ```html <!-- Expected DOM structure --> <div class="accordion"> <div class="accordion-item"> <button class="accordion-header" aria-expanded="false">Section 1</button> <div class="accordion-panel" hidden>Content 1</div> </div> ... </div> ``` ```javascript function initAccordion(container) { // wire up event listeners and ARIA attributes } ``` **Example behavior:** ``` Click "Section 1" -> panel 1 opens, aria-expanded=true Click "Section 2" -> panel 2 opens, panel 1 closes Click "Section 2" again -> panel 2 closes ``` ## Follow-ups 1. How would you support multi-expand mode as a configuration option? 2. What ARIA attributes are required for full screen reader compatibility? 3. How do you handle dynamic content added to panels after initialization? 4. How would you write a unit test for the keyboard navigation behavior?

## Round 1 - System Design ## Problem Design the frontend architecture for a real-time analytics dashboard used by 50,000 concurrent enterprise users. The dashboard displays live charts, filterable data tables, and drill-down panels — all updating every 10 seconds. **Scope (clarify before diving in):** - What is the expected data volume per user per update cycle? - Does the app need to work offline? - What browser support matrix is required? ## Key Areas to Cover **State Management** - How do you structure global vs. local component state? - What state management library (Redux, Zustand, Jotai) fits this scale and why? **Real-Time Data** - WebSocket vs. SSE vs. polling for 10s updates. - How do you handle reconnections gracefully without UI flicker? **Performance** - Virtual scrolling for large tables (100k+ rows). - Chart rendering: Canvas vs. SVG at high data density. - Bundle splitting and lazy loading for dashboard panels. **Component Architecture** - Design a composable filter system that multiple panels share. - How do you isolate panel failures so one broken widget does not crash the dashboard? ## Follow-ups 1. How do you test real-time behavior in a CI environment without a live WebSocket server? 2. What monitoring would you add on the client side to detect and report rendering performance regressions? 3. How would you handle role-based visibility (some panels only visible to admins)?

Implement a small **integration exercise**: based on provided interface/data-source contracts, quickly fetch/transform/aggregate data and output results in the required format. Typical requirements:

Design and implement an **Email Notification Scheduler**. The system receives scheduling requests, each with: - `userId` - `notificationType` - `sendAt` (scheduled time) - `payload` Implement the sc

You are given two kinds of payment-related text records (e.g., invoices and payments/events). Each record is a string containing multiple fields. You need to: 1. **Parse** each record into structured

## Problem: API Integration (Call a REST API and Aggregate Results) Write a program that calls a third-party REST API and aggregates the results. Use the public PokeAPI for practice: `https://pokeap