Zelcastalumni map

People who leave Primer.ai most often go to a long tail of companies. 11% found something next. 18% go small. Median stay 2y 4m

These are the engineers in the Zelcast network and the profiles run through the Eng Scorer, not Primer.ai's headcount: 33 people on a map of 26,572, the No. 302 company on it by people. Updated August 20, 2026.

People on the map
330.1% of everyone on the map
There now
412% of the people here
Moved on
2988% of the people here
Median tenure
2y 4mmiddle half 11m to 3y 11m

Put Primer.ai 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 Microsoft.

Primer.ai31 in · 28 out

28 recorded departures to 26 companies, none more than 2 to any one of them

3Microsoft
3 of 31 recorded arrivals shown, 28 more from 28 other companies0 of 28 recorded departures shown, 28 more to 26 other companies

After Primer.ai

  • 11%Founded something3
  • 18%Joined a startup5
  • 71%Elsewhere

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

How long people stay

28%<1y
16%1-2y
31%2-4y
25%4-7y
0%7y+
2y 4m median tenuremiddle half 11m to 3y 11m

32 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: 34 joined, 30 left.

Caliber

84mediantop 10%94
0Eng Scorer caliber, 33 scored99

Titles held here

  1. Senior Software Engineer10
  2. Director of Engineering4
  3. Software Engineer4
  4. Machine Learning Engineer3
  5. Senior Data Scientist3
  6. Staff Engineer3

6 most common titles, by people who held them.

Behind the median

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

  • 24%Exceptional or strong8 people
  • 45%Solid15 people
  • 30%Emerging or unproven10 people

33 of the 33 people here carry an Eng Scorer tier.

Exceptional and strong are the top two of the five tiers. 8 of the 33 people here with a read sit in them, 24%. 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. A tier holding fewer than 3 people is printed together with the one next to it, because a bucket that small is a person rather than a pattern.

Whether a title rose here

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

59%Titles that rose16 of 27 classified people

  • 59%Rose16 people
  • 41%Stayed level or fell11 people

27 of the 33 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 27 of the 33 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. A direction holding fewer than 3 people is printed together with the one next to it, because a bucket that small is a person rather than a pattern.

Where they studied

  1. Stanford18.2%
  2. UC Berkeley15.2%
  3. Carnegie Mellon9.1%
  4. MIT9.1%

The 4 most listed schools among the 33 people here with a school on file.

Of the 33 people here with a school on file, 6 list Stanford, 5 list UC Berkeley and 3 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
42%have a public GitHub account on their profile

14 of the 33 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

55% of the people who have worked at Primer.ai and list a location live in the San Francisco Bay Area today, against 47% of everyone on the map.

Primer.ai
Everyone on the map
  • 55%SF Bay Area18 · map 47%
  • 30%New York10 · map 33%
  • 12%Washington DC4 · map 7%

All 33 people who worked at Primer.ai 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 they worked at Primer.ai: 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

  • 33 people on the Zelcast alumni map have worked at Primer.ai: 4 are there now and 29 have moved on.
  • The most common previous employer before Primer.ai is Microsoft (3 people).
  • The median tenure at Primer.ai is 2y 4m (middle half 11m to 3y 11m).
  • Of those who moved on from Primer.ai, 11% went on to a founder title, 18% joined a company with 200 or fewer people, and fewer than 3 joined a company with 10,000 or more.
  • The median Eng Scorer caliber of people who have worked at Primer.ai is 84 on the 0 to 99 scale (33 scored).
  • The most common title held at Primer.ai is Senior Software Engineer, then Director of Engineering.
  • Of the 33 people here with a school on file, 6 list Stanford (18.2%), then UC Berkeley (5). A person can list more than one school, so these overlap rather than add up.
  • 55% of the 33 people here who list a location live in SF Bay Area today, against 47% of everyone on the map. That is where they live now, not the office they sat in while they worked here.
  • 42% of the 33 people here whose profile was checked for public accounts have a public GitHub account on it.

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

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