Zelcastalumni map

People who leave Fastly most often go to a long tail of companies. 20% found something next. Median stay 1y 11m

These are the engineers in the Zelcast network and the profiles run through the Eng Scorer, not Fastly's headcount: 24 people on a map of 26,572, the No. 401 company on it by people. Updated August 20, 2026.

People on the map
240.1% of everyone on the map
There now
938% of the people here
Moved on
1563% of the people here
Median tenure
1y 11mmiddle half 1y 3m to 2y 9m

Put Fastly 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 Signal Sciences.

Fastly24 in · 15 out

15 recorded departures to 15 companies, none more than 2 to any one of them

3Signal Sciences
3 of 24 recorded arrivals shown, 21 more from 21 other companies0 of 15 recorded departures shown, 15 more to 15 other companies

After Fastly

  • 20%Founded something3
  • 80%Elsewhere

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

How long people stay

8%<1y
42%1-2y
33%2-4y
13%4-7y
4%7y+
1y 11m median tenuremiddle half 1y 3m to 2y 9m

24 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: 26 joined, 17 left.

Caliber

Not enough scored profiles here yet (24).

Titles held here

  1. Software Engineer8
  2. Senior Software Engineer7
  3. Staff Software Engineer5

3 most common titles, by people who held them.

First job on the record for 4% of people here.

Where they studied

Not enough education on the record here.23 of the 24 people here have a school on file, but no single school is listed by as many as 3 of them, and 3 is the fewest this map will count.

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 than that here.

Where they are now

50% of the people who have worked at Fastly and list a location live in the San Francisco Bay Area today, against 47% of everyone on the map.

Fastly
Everyone on the map
  • 50%SF Bay Area12 · map 47%
  • 33%New York8 · map 33%
  • 17%Somewhere else4

All 24 people who worked at Fastly 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 Fastly: 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.

On the same resumes

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

Key facts

  • 24 people on the Zelcast alumni map have worked at Fastly: 9 are there now and 15 have moved on.
  • The most common previous employer before Fastly is Signal Sciences (3 people).
  • The median tenure at Fastly is 1y 11m (middle half 1y 3m to 2y 9m).
  • Of those who moved on from Fastly, 20% went on to a founder title, fewer than 3 joined a company with 200 or fewer people, and fewer than 3 joined a company with 10,000 or more.
  • The most common title held at Fastly is Software Engineer, then Senior Software Engineer.
  • 50% of the 24 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.

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

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