Zelcastalumni map

People who leave Bloomberg most often go to Google, Meta and Amazon. 4% found something next. 14% go small. Median stay 3y 1m

These are the engineers in the Zelcast network and the profiles run through the Eng Scorer, not Bloomberg's headcount: 681 people on a map of 26,572, the No. 9 company on it by people. Updated August 20, 2026.

People on the map
6812.6% of everyone on the map
There now
30044% of the people here
Moved on
38156% of the people here
Median tenure
3y 1mmiddle half 1y 8m to 4y 5m

Put Bloomberg side by side with another company, every number against every number.

Came from, went to

Ribbon width is the number of people who made the move. Most arrive from Amazon. Most leave for Google (10% of recorded departures).

Bloomberg642 in · 392 out
33Amazon28Meta19Google16Microsoft9Goldman Sachs7Capital One7Morgan Stanley7Palantir Technologies5IBMGoogle3910%Meta359%Amazon133%Palantir Technologies133%Stripe103%Jane Street82%Amazon Web Services72%Two Sigma72%Citadel Securities62%
131 of 642 recorded arrivals shown, 511 more from 444 other companies138 of 392 recorded departures shown, 254 more to 185 other companies

After Bloomberg

  • 4%Founded something15
  • 14%Joined a startup53
  • 28%Joined a big company103
  • 54%Elsewhere

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

The Bloomberg mafia

15 of the people who left went straight to a founding role, 4% of those who moved on, half of them within a month of leaving. The bars are the ’15 to ’26 classes; earlier founders count in the total.

How long people stay

11%<1y
17%1-2y
41%2-4y
23%4-7y
7%7y+
3y 1m median tenuremiddle half 1y 8m to 4y 5m

562 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: 713 joined, 433 left.

Caliber

82mediantop 10%89
0Eng Scorer caliber, 681 scored99

there now 79 moved on 84. The people who left score higher than the people still there.

Titles held here

  1. Software Engineer342
  2. Senior Software Engineer160
  3. Software Engineer Intern137
  4. Engineering Manager22
  5. Software Development Intern11
  6. Software Engineering Team Lead11
  7. Financial Software Developer10
  8. Financial Software Developer Intern7

8 most common titles, by people who held them.

First job on the record for 13% of people here.

Behind the median

Everyone here with an Eng Scorer read, placed in their caliber tier.

  • 2%Exceptional16 people
  • 17%Strong116 people
  • 40%Solid274 people
  • 39%Emerging262 people
  • 2%Unproven12 people

680 of the 681 people here carry an Eng Scorer tier.

Exceptional and strong are the top two of the five tiers. 132 of the 680 people here with a read sit in them, 19%. A tier is the band an Eng Scorer caliber score falls in, so this is the same measurement as the median on the caliber card, opened up.

Whether a title rose here

The level of the first title recorded here, against the last.

35%Titles that rose161 of 454 classified people

  • 35%Rose161 people
  • 59%Stayed level270 people
  • 5%Fell23 people

454 of the 681 people here had a title that could be placed on the ladder before and after.

A title rose when the last title recorded here sits higher on the ladder than the first; for someone who recorded one title here and then left, it is measured against the first title of their next role. The ladder runs intern, junior, mid, senior, staff or manager, principal, director, VP, then founder or C-level. A title that matches no rung is left out rather than guessed, and product, program and project managers are left out entirely, being a different ladder. That leaves 454 of the 681 people here classified, and it leans towards people who have left: someone still here on a single recorded title has nothing to be measured against.

Where they studied

  1. UC Berkeley6.1%
  2. University of Waterloo5.8%
  3. Carnegie Mellon5.4%
  4. Columbia4.9%
  5. NYU4.8%
  6. Georgia Tech4.2%
  7. MIT4.0%
  8. UIUC3.7%

The 8 most listed schools among the 672 people here with a school on file.

Of the 672 people here with a school on file, 41 list UC Berkeley, 39 list University of Waterloo and 36 list Carnegie Mellon. A person can list more than one school, so these overlap rather than add up.

Public work

one square is one in a hundred
29%have a public GitHub account on their profile

200 of the 680 people here whose profile was checked for public accounts. An account the check did not find reads the same as no account, so this is a floor rather than a census.

Across the 325 companies on the map that can show this figure, the median is 38%.

Where they are now

79% of the people who have worked at Bloomberg and list a location live in New York today, against 33% of everyone on the map.

Bloomberg
Everyone on the map
  • 79%New York533 · map 33%
  • 18%SF Bay Area119 · map 47%
  • 0.9%Washington DC6 · map 7%
  • 0.7%Los Angeles5 · map 6%
  • 0.4%Seattle3 · map 3%
  • 1%Somewhere else10

676 of the 681 people who worked at Bloomberg list a location, and every share here is over those 676.

Where they live now, from the profile as it reads today, not where they sat while they worked at Bloomberg: a metro here does not mean the company has an office in it. The lower strip is the same metros across the whole map, for comparison.

Key facts

  • 681 people on the Zelcast alumni map have worked at Bloomberg: 300 are there now and 381 have moved on.
  • The most common next employer after Bloomberg is Google (39 people, 10% of recorded departures), followed by Meta and Amazon.
  • The most common previous employer before Bloomberg is Amazon (33 people), followed by Meta and Google.
  • The median tenure at Bloomberg is 3y 1m (middle half 1y 8m to 4y 5m).
  • Of those who moved on from Bloomberg, 4% went on to a founder title, 14% joined a company with 200 or fewer people, and 28% joined a company with 10,000 or more.
  • The median Eng Scorer caliber of people who have worked at Bloomberg is 82 on the 0 to 99 scale (681 scored).
  • The most common title held at Bloomberg is Software Engineer, then Senior Software Engineer.
  • Of the 672 people here with a school on file, 41 list UC Berkeley (6.1%), then University of Waterloo (39). A person can list more than one school, so these overlap rather than add up.
  • 79% of the 676 people here who list a location live in New York today, against 33% of everyone on the map. That is where they live now, not the office they sat in while they worked here.
  • 29% of the 680 people here whose profile was checked for public accounts have a public GitHub account on it.
  • Of the 454 people here whose title could be placed on a ladder both before and after, 161 rose, 270 stayed level and 23 fell.

About this data: built from 144,786 jobs across 26,572 engineers in the Zelcast network and Eng Scorer reads, updated August 20, 2026. A move counts when the next role starts within 24 months of leaving; companies with fewer than 20 people on the map are not shown, and destinations with fewer than 3 people are folded into the totals. Caliber is the Eng Scorer score.

Worked at Bloomberg? See how your profile reads to a startup hiring manager, and where it ranks among 26,572 engineers.

Previous on the mapStripeNo. 8 by people · 713 on the mapNext on the mapOpenAINo. 10 by people · 668 on the map

Arrow keys move along the map.