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Salesforce interview notes, page 3 of 13

Large Enterprises

Most of these Salesforce write-ups come from Software Engineers (104), then Product Managers (6) and Backend Engineers (4). The most reported rounds are the technical phone screen (65), the system design round (31), the hiring manager screen (6) and the behavioral / leadership round (5).

121 interview notes · updated Sep 2026

Salesforce·Software Engineer·Onsite - System Design / Architecture

Apr 2026
Salesforce system design round, low-level OO focus on a Watch Party feature. The question was more detailed than I expected and the follow-ups pushed pretty hard on failure scenarios and scaling.
  • Design a Watch Party system where a host creates a virtual room with a unique ID, multiple users can join, and everyone's video playback stays in sync in real time. Support play, pause, seek, and playback speed controls.
  • How does a playback control command from the host propagate to all participants given variable network latency and client clock drift?
  • Walk through the edge cases: a participant joining mid-playback, the host disconnecting, conflicting near-simultaneous commands, a buffering client, and a participant who drops and reconnects.
  • How would you scale this to hundreds of thousands of concurrent rooms across multiple servers, and how do you handle failover for a room's authoritative node?
  • If any participant could issue playback commands instead of just the host, how would you prevent control conflicts and ensure a deterministic command ordering?
  • How would you measure sync quality in production and alert when participants in a room are drifting apart?

“The core of the whole interview.”

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Salesforce·Software Engineer·Online Assessment (OA)

Apr 2026
Salesforce OA for a software engineer role, code-review format where you play the reviewer on a small Python codebase doing SQL and I/O stuff. Not your typical LeetCode grind, which I appreciated, but it's easy to miss categories if you're not being systematic about it.
  • You're given a small Python codebase that handles SQL inserts, queries, and other I/O operations. Act as a code reviewer and leave at least 10 distinct review comments spanning multiple concern categories: security, data layer design, concurrency, error handling, and general code quality. Each comment needs to explain the problem and suggest a concrete fix.

“This is a deceptively broad prompt.”

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Salesforce·Software Engineer·Technical Phone Screen

Apr 2026
Salesforce solutions architect interview where the main task was demoing MongoDB for an ecommerce client scenario. Not a lot of traditional Q&A, more of a live presentation exercise.
  • Walk through a MongoDB demo tailored for an ecommerce client and explain why it fits their use case.

“This was basically the whole interview.”

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Salesforce·Product Manager·Hiring Manager Screen

Apr 2026
Short Salesforce PM screen, basically just one question about a SaaS product you use. Pretty low-key, felt more like a warmup than a real evaluation.
  • Tell me about a SaaS product you genuinely enjoy using.

“I picked Notion because it was the first thing that came to mind and I use it every day.”

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Salesforce·Software Engineer·Technical Phone Screen

Apr 2026
Salesforce SWE interview with an in-place string compression problem. Pretty standard algorithmic round, nothing flashy, but the constant space constraint is where people trip up.
  • Given an array of characters, compress it in-place by replacing consecutive repeated characters with the character followed by its count. Group lengths of 10 or more should be split into individual digit characters. Return the new length of the array using only constant extra space.

“The basic logic clicks pretty fast: iterate, count runs, write back.”

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Salesforce·Machine Learning Engineer·Onsite - System Design / Architecture

Apr 2026
System design round at Salesforce for an ML Engineer role, which felt a bit odd given the topic was basically a Google Sheets clone. The question was dense and covered a lot of ground, from concurrency to storage to permissions, and I felt like I was constantly triaging what to go deep on versus skim.
  • Design a web-based collaborative spreadsheet service like Google Sheets. Cover backend architecture, data models for workbooks, sheets, cells, and formulas, concurrency control for simultaneous editors, autosave, version history, snapshots, permissions, and the trade-offs between different storage and sync approaches.

“This one sprawled fast.”

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Salesforce·Software Engineer·Technical Phone Screen

Apr 2026
Salesforce software engineer interview that went deep into number theory territory. The main problem was implementing Non-Adjacent Form (NAF) representation for integers, which I genuinely had not thought about since a cryptography elective years ago. It was a lot more involved than a typical coding round.
  • Implement a function toNAF(n) that converts an integer n (including negatives) to its Non-Adjacent Form using digits from {-1, 0, 1}, where no two adjacent digits are both nonzero, returning the result least-significant-first. Also implement fromNAF(digits) to convert back to the original integer.
  • Prove that the NAF representation is correct and explain why it minimizes the number of nonzero digits among all signed-binary representations of an integer.
  • Analyze the time and space complexity of your toNAF and fromNAF implementations, and discuss edge cases like n = 0 and very large magnitudes.
  • As an extension: how would you use the NAF representation of k to compute n * k more efficiently, reducing the number of additions needed?

“I knew what NAF was in theory but writing the actual algorithm under pressure was a different story.”

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Salesforce·Software Engineer·Hiring Manager Screen

Apr 2026
Salesforce hiring manager screen for a software engineer role, 45 minutes, all behavioral. Three meaty questions with a bunch of follow-ups lurking underneath each one. Not a brutal round but you really need actual stories ready, not vibes.
  • Tell me about a project where you took the most ownership. What decisions did you make and why?
  • Describe a time you had a technical disagreement with a teammate or team. How did you move the work forward?
  • Walk me through a production incident or a significant project setback. How did you run the retrospective and what actually changed afterward?

“This one goes deeper than it looks.”

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Salesforce·Software Engineer·Onsite - System Design / Architecture

May 2026
Salesforce system design round, one big question about building a 911 call service from scratch. Pretty intense scope for a single session and I definitely underestimated how much the regulatory and failover angles would come up.
  • Design a 911 emergency call service. It needs to accept incoming calls, locate the caller via GPS and cell tower data, route the call to the nearest available dispatcher based on jurisdiction, record audio and transcripts, and notify dispatchers of queued calls. How do you handle the data model, routing logic, and failover?

“I started with the happy path, which felt fine at first, but the interviewer kept pushing on what happens when the primary datacenter goes down mid-call.”

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Salesforce·Software Engineer·Technical Phone Screen

May 2026
Salesforce SWE interview with a DP problem that looked deceptively clean on the surface. The twist of combining subsequence logic with substring constraints is the kind of thing that bites you if you go in assuming it's a standard LCS.
  • Given two strings x and y, find the length of the longest subsequence of x that is also a contiguous substring of y. Optionally reconstruct the actual matching string.

“The part that tripped me up was the asymmetry: x contributes a subsequence (characters don't have to be adjacent) but y contributes a substring (they do).”

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