Zelcastalumni map

People who leave Unit21 most often go to a long tail of companies. Of them, 21% go somewhere small. The median tenure is 1y 9m

Not Unit21's headcount: these are the engineers in the Zelcast network and the profiles run through the Eng Scorer. 27 people on a map of 67,181, No. 960 on it by people. Updated September 30, 2026.

People on the map
27Under 0.1% of everyone on the map
There now
1348% of the people here
Moved on
1452% of the people here
Median tenure
1y 9mmiddle half 1y 2m to 4y 7m

Put Unit21 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 Unit21 yet.

After Unit21

  • 21%Joined a startup3
  • 79%Elsewhere

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

How long people stay

18%<1y
36%1-2y
18%2-4y
25%4-7y
4%7y+
1y 9m median tenuremiddle half 1y 2m to 4y 7m

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

Who comes and goes, by year

18
19
20
21
22
23
24
25
26
joined left2026 is a partial year

2018 to 2026: 28 joined, 15 left.

Caliber

Not enough scored profiles here yet (16).

Titles held here

  1. Software Engineer17
  2. Senior Software Engineer4

2 most common titles, by people who held them.

Where they studied

  1. San Jose State11.5%
  2. Stanford11.5%

The 2 most listed schools among the 26 people here with a school on file.

3 of the 26 people here with a school on file list San Jose State and 3 list Stanford. 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

93% of the people who have worked at Unit21 and list a location live in the San Francisco Bay Area today, against 41% of everyone on the map.

Unit21
Everyone on the map
  • 93%SF Bay Area25 · map 41%

All 27 people who worked at Unit21 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 Unit21: a metro here isn't an office there. The lower strip is the same metros across the whole map.

On the same resumes

Companies that show up most often alongside Unit21, at any point in a career.

Key facts

  • 27 people on the Zelcast alumni map have worked at Unit21: 13 are there now, 14 have moved on.
  • Median tenure at Unit21: 1y 9m, middle half 1y 2m to 4y 7m.
  • Of the people with a recorded next move after Unit21, fewer than 3 went to a founder title next, 21% joined a company of 200 or fewer, and fewer than 3 joined one of 10,000 or more.
  • Most common title held here: Software Engineer, then Senior Software Engineer.
  • Top school: San Jose State, listed by 3 of the 26 people here with one on file (11.5%). Then Stanford (3).
  • 93% of the 27 people here who list a location live in SF Bay Area today, against 41% 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 Unit21? See how your profile reads to a startup hiring manager, and where it ranks among 67,181 engineers.

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