Zelcastalumni map

People who leave Persona most often go to a long tail of companies. The median tenure is 2y 3m

Not Persona's headcount: these are the engineers in the Zelcast network and the profiles run through the Eng Scorer. 60 people on a map of 67,181, No. 399 on it by people. Updated September 30, 2026.

People on the map
600.1% of everyone on the map
There now
4677% of the people here
Moved on
1423% of the people here
Median tenure
2y 3mmiddle half 11m to 5y 1m

Put Persona side by side with another employer.

Came from, went to

Ribbon width is the number of people who made the move. Most arrive from Square.

Persona58 in · 13 out

13 recorded departures to 10 companies, none more than 2 to any one of them

12%7Square7%4Dropbox5%3Transposit
14 of 58 recorded arrivals shown, 44 more from 40 other companies0 of 13 recorded departures shown, 13 more to 10 other companies

After Persona

  • 38%Joined a big company5
  • 62%Elsewhere

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

How long people stay

27%<1y
21%1-2y
13%2-4y
36%4-7y
4%7y+
2y 3m median tenuremiddle half 11m to 5y 1m

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

Who comes and goes, by year

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

2016 to 2026: 62 joined, 16 left.

Caliber

82mediantop 10%86
0Eng Scorer caliber, 47 scored99

Titles held here

  1. Software Engineer43
  2. Software Engineer Intern6
  3. Engineering Manager4

3 most common titles, by people who held them.

Behind the median

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

  • 11%Strong5 people
  • 49%Solid23 people
  • 34%Emerging16 people
  • 6%Unproven3 people

47 of the 60 people here carry an Eng Scorer tier.

5 of the 47 people here with a read sit in exceptional or strong, the top two of the five tiers, 11%. A tier is the band a 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.

43%Titles that rose9 of 21 classified people

  • 43%Rose9 people
  • 57%Stayed level12 people

21 of the 60 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 with one title here who then left, it's 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. Titles that match no rung are left out rather than guessed, and product, program and project managers are left out entirely as a different ladder. What's left leans towards people who have left: someone still here on one recorded title has nothing to measure against.

Where they studied

  1. University of Waterloo13.3%
  2. UC Berkeley8.3%
  3. USC8.3%
  4. Georgia Tech6.7%
  5. Harvard5.0%
  6. MIT5.0%

The 6 most listed schools among the 60 people here with a school on file.

8 of the 60 people here with a school on file list University of Waterloo, 5 list UC Berkeley and 5 list USC. A person can list more than one, so these overlap.

Public work

one square is one in a hundred
42%have a public GitHub account on their profile

25 of the 60 people here whose profile was checked for public accounts. An account the check missed reads the same as no account, so this is a floor.

31% is the median across the 857 companies that can show this figure.

Where they are now

77% of the people who have worked at Persona and list a location live in the San Francisco Bay Area today, against 41% of everyone on the map.

Persona
Everyone on the map
  • 77%SF Bay Area46 · map 41%
  • 18%New York11 · map 18%
  • 5%Somewhere else3

All 60 people who worked at Persona 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 Persona: a metro here isn't an office there. The lower strip is the same metros across the whole map.

Key facts

  • 60 people on the Zelcast alumni map have worked at Persona: 46 are there now, 14 have moved on.
  • Most arrive from Square: 7 people. Then Dropbox and Transposit.
  • Median tenure at Persona: 2y 3m, middle half 11m to 5y 1m.
  • Of the people with a recorded next move after Persona, fewer than 3 went to a founder title next, fewer than 3 joined a company of 200 or fewer, and 38% joined one of 10,000 or more.
  • Median Eng Scorer caliber here: 82 on the 0 to 99 scale, across 47 scored people.
  • Most common title held here: Software Engineer, then Software Engineer Intern.
  • Top school: University of Waterloo, listed by 8 of the 60 people here with one on file (13.3%). Then UC Berkeley (5).
  • 77% of the 60 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.
  • 42% of the 60 people here whose profile was checked for public accounts have a public GitHub.

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

Previous on the mapNational Geospatial-Intelligence AgencyNo. 398 by people · 60 on the mapNext on the mapPrimer.aiNo. 400 by people · 60 on the map

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