Zelcastalumni map

People who leave Twilio most often go to Amazon, Mapbox and Pave. 6% found something next. 27% go small. Median stay 2y 10m

These are the engineers in the Zelcast network and the profiles run through the Eng Scorer, not Twilio's headcount: 103 people on a map of 26,572, the No. 91 company on it by people. Updated August 20, 2026.

People on the map
1030.4% of everyone on the map
There now
2827% of the people here
Moved on
7573% of the people here
Median tenure
2y 10mmiddle half 1y 8m to 4y 7m

Put Twilio 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 Amazon. Most leave for Amazon (4% of recorded departures).

Twilio101 in · 81 out
4Amazon3Capital OneAmazon34%Mapbox34%Pave34%Stripe34%
7 of 101 recorded arrivals shown, 94 more from 90 other companies12 of 81 recorded departures shown, 69 more to 65 other companies

After Twilio

  • 6%Founded something5
  • 27%Joined a startup21
  • 4%Joined a big company3
  • 62%Elsewhere

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

How long people stay

9%<1y
21%1-2y
36%2-4y
30%4-7y
4%7y+
2y 10m median tenuremiddle half 1y 8m to 4y 7m

97 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: 121 joined, 95 left.

Caliber

82mediantop 10%89
0Eng Scorer caliber, 103 scored99

Titles held here

  1. Software Engineer45
  2. Senior Software Engineer27
  3. Software Engineer Intern26
  4. Staff Software Engineer14
  5. Software Engineer II12
  6. Engineering Manager7
  7. Principal Software Engineer6
  8. Senior Engineering Manager5

8 most common titles, by people who held them.

First job on the record for 7% of people here.

Behind the median

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

  • 3%Exceptional3 people
  • 15%Strong15 people
  • 43%Solid44 people
  • 40%Emerging or unproven41 people

103 of the 103 people here carry an Eng Scorer tier.

Exceptional and strong are the top two of the five tiers. 18 of the 103 people here with a read sit in them, 17%. 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.

49%Titles that rose45 of 91 classified people

  • 49%Rose45 people
  • 46%Stayed level42 people
  • 4%Fell4 people

91 of the 103 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 91 of the 103 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.

Where they studied

  1. UC Berkeley20.4%
  2. Carnegie Mellon6.8%
  3. Georgia Tech4.9%
  4. UC Irvine4.9%
  5. UCLA3.9%
  6. UC Davis2.9%
  7. UC San Diego2.9%
  8. University of Michigan2.9%

The 8 most listed schools among the 103 people here with a school on file.

Of the 103 people here with a school on file, 21 list UC Berkeley, 7 list Carnegie Mellon and 5 list Georgia Tech. A person can list more than one school, so these overlap rather than add up.

Public work

one square is one in a hundred
52%have a public GitHub account on their profile

54 of the 103 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

69% of the people who have worked at Twilio and list a location live in the San Francisco Bay Area today, against 47% of everyone on the map.

Twilio
Everyone on the map
  • 69%SF Bay Area71 · map 47%
  • 25%New York26 · map 33%
  • 6%Somewhere else6

All 103 people who worked at Twilio 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 Twilio: 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

  • 103 people on the Zelcast alumni map have worked at Twilio: 28 are there now and 75 have moved on.
  • The most common next employer after Twilio is Amazon (3 people, 4% of recorded departures), followed by Mapbox and Pave.
  • The most common previous employer before Twilio is Amazon (4 people), followed by Capital One.
  • The median tenure at Twilio is 2y 10m (middle half 1y 8m to 4y 7m).
  • Of those who moved on from Twilio, 6% went on to a founder title, 27% joined a company with 200 or fewer people, and 4% joined a company with 10,000 or more.
  • The median Eng Scorer caliber of people who have worked at Twilio is 82 on the 0 to 99 scale (103 scored).
  • The most common title held at Twilio is Software Engineer, then Senior Software Engineer.
  • Of the 103 people here with a school on file, 21 list UC Berkeley (20.4%), then Carnegie Mellon (7). A person can list more than one school, so these overlap rather than add up.
  • 69% of the 103 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.
  • 52% of the 103 people here whose profile was checked for public accounts have a public GitHub account on it.
  • Of the 91 people here whose title could be placed on a ladder both before and after, 45 rose, 42 stayed level and 4 fell.

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

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