After A9.com
- 6%Joined a startup4
- 52%Joined a big company34
- 42%Elsewhere
Shares of those who moved on, by their next stop.
People who leave A9.com most often go to Google, Amazon and Meta. The median tenure is 2y 4m
Not A9.com's headcount: these are the engineers in the Zelcast network and the profiles run through the Eng Scorer. 74 people on a map of 67,181, No. 313 on it by people. Updated September 30, 2026.
- People on the map
- 740.1% of everyone on the map
- There now
- 34% of the people here
- Moved on
- 7196% of the people here
- Median tenure
- 2y 4mmiddle half 1y 3m to 4y 1m
Came from, went to
Ribbon width is the number of people who made the move. Most arrive from Google. Most leave for Google (17% of recorded departures).
6 of 60 recorded arrivals shown, 54 more from 51 other companies33 of 71 recorded departures shown, 38 more to 31 other companies
How long people stay
16%<1y
23%1-2y
32%2-4y
23%4-7y
7%7y+
44 stays with both a start and an end on the record.
Who comes and goes, by year
5412
8713
7514
101415
111016
10417
11718
81019
5920
3521
<3322
0<323
<3<324
0025
0<326
joined left2026 is a partial year
2012 to 2026: 80 joined, 81 left.
Caliber
85mediantop 10%94
0Eng Scorer caliber, 43 scored99
Titles held here
- Software Development Engineer20
- Software Engineer Intern16
- Software Engineer12
- Software Development Intern11
- Software Development Engineer Intern7
- Applied Scientist5
- Senior Software Development Engineer4
- Software Development Engineer II4
8 most common titles, by people who held them.
First job on the record for 20% of people here.
Behind the median
Everyone here with an Eng Scorer read, placed in their caliber tier.
- 40%Exceptional or strong17 people
- 42%Solid18 people
- 19%Emerging or unproven8 people
43 of the 74 people here carry an Eng Scorer tier.
17 of the 43 people here with a read sit in exceptional or strong, the top two of the five tiers, 40%. 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. A tier holding fewer than 3 people is printed with the one next to it, because that few is a person rather than a pattern.
Whether a title rose here
The level of the first title recorded here, against the last.
53%Titles that rose35 of 66 classified people
- 53%Rose35 people
- 47%Stayed level31 people
66 of the 74 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
- UC Berkeley23.0%
- University of Waterloo14.9%
- Stanford13.5%
- Carnegie Mellon8.1%
- MIT8.1%
- UC San Diego5.4%
- IIT Madras4.1%
The 7 most listed schools among the 74 people here with a school on file.
17 of the 74 people here with a school on file list UC Berkeley, 11 list University of Waterloo and 10 list Stanford. A person can list more than one, so these overlap.
Public work
one square is one in a hundred
53%have a public GitHub account on their profile
39 of the 74 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
82% of the people who have worked at A9.com and list a location live in the San Francisco Bay Area today, against 41% of everyone on the map.
A9.com
Everyone on the map
- 82%SF Bay Area61 · map 41%
- 11%New York8 · map 18%
- 7%Somewhere else5
All 74 people who worked at A9.com 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 A9.com: 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 A9.com, at any point in a career.
Key facts
- 74 people on the Zelcast alumni map have worked at A9.com: 3 are there now, 71 have moved on.
- Most leave for Google: 12 people, 17% of recorded departures. Then Amazon and Meta.
- Most arrive from Google: 6 people.
- Median tenure at A9.com: 2y 4m, middle half 1y 3m to 4y 1m.
- Of the people with a recorded next move after A9.com, fewer than 3 went to a founder title next, 6% joined a company of 200 or fewer, and 52% joined one of 10,000 or more.
- Median Eng Scorer caliber here: 85 on the 0 to 99 scale, across 43 scored people.
- Most common title held here: Software Development Engineer, then Software Engineer Intern.
- Top school: UC Berkeley, listed by 17 of the 74 people here with one on file (23.0%). Then University of Waterloo (11).
- 82% of the 74 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.
- 53% of the 74 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 A9.com? See how your profile reads to a startup hiring manager, and where it ranks among 67,181 engineers.
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