Zelcastalumni map

People who leave Tumblr most often go to a long tail of companies. Of them, 23% go somewhere small

Not Tumblr's headcount: these are the engineers in the Zelcast network and the profiles run through the Eng Scorer. 22 people on a map of 67,181, No. 1,192 on it by people. Updated September 30, 2026.

People on the map
22Under 0.1% of everyone on the map
There now
00% of the people here
Moved on
22100% of the people here
Median tenure
–fewer than 20 stays here have both a start and an end on the record, too few for a median

Put Tumblr side by side with another employer.

Came from, went to

Ribbon width is the number of people who made the move.

Not enough recorded moves to draw a river for Tumblr yet.

After Tumblr

  • 23%Joined a startup5
  • 23%Joined a big company5
  • 55%Elsewhere

Shares of those who moved on, by their next stop.

How long people stay

20%<1y
13%1-2y
47%2-4y
13%4-7y
7%7y+
– median tenure

15 stays with both a start and an end on the record.

Who comes and goes, by year

12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
joined left2026 is a partial year

2012 to 2026: 20 joined, 22 left.

Caliber

Not enough scored profiles here yet (16).

Titles held here

  1. Software Engineer5
  2. Software Engineer Intern4

2 most common titles, by people who held them.

First job on the record for 27% of people here.

Where they studied

  1. MIT14.3%
  2. Rutgers14.3%

The 2 most listed schools among the 21 people here with a school on file.

3 of the 21 people here with a school on file list MIT and 3 list Rutgers. A person can list more than one, so these overlap.

Public work

Not enough of the record here has been checked.This share needs 30 people whose profile was checked for public accounts, and there are fewer here.

Where they are now

50% of the people who have worked at Tumblr and list a location live in New York today, against 18% of everyone on the map.

Tumblr
Everyone on the map
  • 50%New York11 · map 18%
  • 36%SF Bay Area8 · map 41%
  • 14%Somewhere else3

All 22 people who worked at Tumblr list a location, and every share here is over them.

Where they live now, from the profile as it reads today, not where they sat while working at Tumblr: a metro here isn't an office there. The lower strip is the same metros across the whole map.

Key facts

  • 22 people on the Zelcast alumni map have worked at Tumblr: 0 are there now, 22 have moved on.
  • Of the people with a recorded next move after Tumblr, fewer than 3 went to a founder title next, 23% joined a company of 200 or fewer, and 23% joined one of 10,000 or more.
  • Most common title held here: Software Engineer, then Software Engineer Intern.
  • Top school: MIT, listed by 3 of the 21 people here with one on file (14.3%). Then Rutgers (3).
  • 50% of the 22 people here who list a location live in New York today, against 18% across the map. Where they live now, not the office they sat in while they worked here.

About this data: built from 352,028 jobs across 67,181 engineers in the Zelcast network and Eng Scorer reads, updated September 30, 2026. A move counts when the next role starts within 24 months of leaving. Companies under 20 people on the map aren't shown, and destinations under 3 people fold into the totals. Caliber is the Eng Scorer score.

Worked at Tumblr? See how your profile reads to a startup hiring manager, and where it ranks among 67,181 engineers.

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