Top Software Engineers in

Scala Ecosystem and Reactive Programming

Scala Ecosystem and Reactive Programming focuses on the use of Scala, a powerful programming language that supports functional and object-oriented styles. This subject area includes libraries and frameworks such as Akka for building concurrent and distributed systems, and ZIO for type-safe, asynchronous programming. It also embraces reactive programming paradigms to create systems that are responsive, resilient, and elastic.

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1

Akka Tech Lead at Lightbend
/
Sweden
Rock Star
23 years of coding experience
TOP CONTRIBUTIONS TO PROJECTS
akka/akka
Akka: 6150 commits in 11 years 3 months
ktoso/akka
Akka: 2161 commits in 6 years 3 months
akka-ja/akka-doc-ja
Akka-doc-ja: 646 commits in 4 years 11 months
Top skills
Score
akka
10
distributed-systems
10
streaming
10

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2

Software Engineer
/
Sweden
Rock Star
15 years of coding experience
TOP CONTRIBUTIONS TO PROJECTS
akka/akka
Akka: 4821 commits in 12 years
ktoso/akka
Akka: 4085 commits in 6 years 5 months
akka-ja/akka-doc-ja
Akka-doc-ja: 482 commits in 4 years 11 months
Top skills
Score
reactive
10
cloud-native
10
streaming
10

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3

Professor at EPFL
/
Switzerland
Rock Star
TOP CONTRIBUTIONS TO PROJECTS
lampepfl/dotty
Dotty: 11782 commits in 10 years 3 months
dotty-staging/dotty
Dotty: 3137 commits in 9 years
scalagwt/scalagwt-scala
Scalagwt-scala: 1932 commits in 9 years
Top skills
Score
scala
10
dotty
10
scala3
10

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4

Principal Engineer at Lightbend, Inc.
/
Australia
Rock Star
TOP CONTRIBUTIONS TO PROJECTS
scala/scala
Scala: 3558 commits in 10 years 10 months
retronym/scala
Scala: 3379 commits in 10 years 6 months
scalaz/scalaz
Scalaz: 1061 commits in 6 years 6 months
Top skills
Score
scala
10
functional-programming
10
jvm-languages
9

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5

Lead of the Scala Team at Lightbend
/
Switzerland
Rock Star
10 years of coding experience
TOP CONTRIBUTIONS TO PROJECTS
scala/scala
Scala: 3110 commits in 15 years
scalagwt/scalagwt-scala
Scalagwt-scala: 345 commits in 3 years 11 months
retronym/scala
Scala: 284 commits in 13 years 6 months
Top skills
Score
scala
10
scala-compiler
10
jvm-languages
10

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6

CTO and co-founder of Actyx AG at Actyx
/
Germany
Rock Star
16 years of coding experience
TOP CONTRIBUTIONS TO PROJECTS
akka/akka
Akka: 2575 commits in 7 years 5 months
ktoso/akka
Akka: 1627 commits in 5 years 1 months
akka-ja/akka-doc-ja
Akka-doc-ja: 479 commits in 5 years 5 months
Top skills
Score
reactive
10
akka
10
streaming
10

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7

Learning to use the tools I helped build. at Zf
/
Switzerland
Rock Star
20 years of coding experience
TOP CONTRIBUTIONS TO PROJECTS
scala/scala
Scala: 2737 commits in 14 years 2 months
adriaanm/scala
Scala: 989 commits in 10 years 6 months
scala/scala-jenkins-infra
Scala-jenkins-infra: 438 commits in 4 years 4 months
Top skills
Score
scala
10
jvm-languages
10
scala-compiler
10

#

8

Swift Team @ 🍎 at Apple
/
Japan
Rock Star
20 years of coding experience
TOP CONTRIBUTIONS TO PROJECTS
akka/akka
Akka: 2445 commits in 4 years 8 months
apple/swift-distributed-actors
Swift-distributed-actors: 1233 commits in 4 years 2 months
ktoso/akka
Akka: 1014 commits in 6 years 4 months
Top skills
Score
distributed-systems
10
akka
10
reactive
10

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9

Principal Architect, Lightbend at Lightbend
/
Australia
Rock Star
22 years of coding experience
TOP CONTRIBUTIONS TO PROJECTS
playframework/playframework
Playframework: 2106 commits in 9 years 9 months
cloudstateio/cloudstate
Cloudstate: 214 commits in 1 year 10 months
pebbleblog/pebble
Pebble: 202 commits in 11 years 2 months
Top skills
Score
reactive
10
scala
10
playframework
10

#

10

It is not enough to do your best, you must know what to do, and THEN do your best.
/
Austria
Rock Star
30 years of coding experience
TOP CONTRIBUTIONS TO PROJECTS
playframework/playframework
Playframework: 1671 commits in 9 years
schaloner/deadbolt-2-java
Deadbolt-2-java: 205 commits in 4 years 8 months
playframework/twirl
Twirl: 198 commits in 4 years 11 months
Top skills
Score
scala
10
playframework
10
java
10

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11

Performance-minded engineer at Lightbend, Inc.
/
Germany
Rock Star
19 years of coding experience
TOP CONTRIBUTIONS TO PROJECTS
akka/akka
Akka: 1801 commits in 11 years 3 months
akka/akka-http
Akka-http: 1010 commits in 6 years 9 months
ktoso/akka
Akka: 545 commits in 6 years 8 months
Top skills
Score
akka
10
streaming
10
distributed-systems
10

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12

Senior Software engineer at EPFL (Ecole polytechnique fédérale de Lausanne)
/
Switzerland
Rock Star
14 years of coding experience
TOP CONTRIBUTIONS TO PROJECTS
lampepfl/dotty
Dotty: 5236 commits in 6 years 8 months
dotty-staging/dotty
Dotty: 1316 commits in 6 years 8 months
nicolasstucki/scala-rrb-vector
Scala-rrb-vector: 367 commits in 4 years 9 months
Top skills
Score
scala
10
dotty
10
scala3
10

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13

Employed at CAZ, Inc.
/
United States
Rock Star
16 years of coding experience
TOP CONTRIBUTIONS TO PROJECTS
scalagwt/scalagwt-scala
Scalagwt-scala: 2606 commits in 3 years
scala/scala
Scala: 1720 commits in 5 years 8 months
dwijnand/psp-std
Psp-std: 633 commits in 3 years 2 months
Top skills
Score
scala
10
jvm-languages
10
scala-compiler
10

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14

on the Scala team at Lightbend
/
United States
Rock Star
33 years of coding experience
TOP CONTRIBUTIONS TO PROJECTS
scala/community-build
Community-build: 5561 commits in 7 years 8 months
NetLogo/NetLogo
NetLogo: 3048 commits in 10 years 9 months
scala/scala
Scala: 1570 commits in 9 years 8 months
Top skills
Score
scala
10
functional-programming
6
jvm-languages
5

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15

in the Akka Team @ Lightbend at Lightbend
/
Sweden
Rock Star
13 years of coding experience
TOP CONTRIBUTIONS TO PROJECTS
akka/akka
Akka: 1109 commits in 7 years 2 months
johanandren/akka
Akka: 1092 commits in 6 years 10 months
akka/akka.io
Akka.io: 160 commits in 6 years 10 months
Top skills
Score
akka
10
streaming
10
distributed-systems
10

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16

Engineering Manager/Tech Lead/Software Engineer at Cap3 GmbH
/
Canada
Rock Star
20 years of coding experience
TOP CONTRIBUTIONS TO PROJECTS
playframework/playframework
Playframework: 838 commits in 4 years 11 months
lagom/lagom
Lagom: 224 commits in 3 years 9 months
playframework/play-ws
Play-ws: 86 commits in 2 years 10 months
Top skills
Score
reactive
10
playframework
10
java
10

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17

Principal Engineer at Iterable
/
United States
Rock Star
16 years of coding experience
TOP CONTRIBUTIONS TO PROJECTS
playframework/playframework
Playframework: 827 commits in 9 years 1 months
gmethvin/directory-watcher
Directory-watcher: 168 commits in 5 years 3 months
playframework/play-json
Play-json: 70 commits in 1 year 10 months
Top skills
Score
reactive
10
playframework
10
java
10

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18

Senior Software Engineer at Datadog
/
Sweden
Rock Star
26 years of coding experience
TOP CONTRIBUTIONS TO PROJECTS
akka/akka
Akka: 899 commits in 5 years 9 months
DataDog/dd-trace-java
Dd-trace-java: 807 commits in 2 years 9 months
ktoso/akka
Akka: 563 commits in 4 years 8 months
Top skills
Score
akka
10
streaming
10
distributed-systems
10

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19

Independent Open Source Engineer at Engelen Open Source
/
Netherlands
Rock Star
23 years of coding experience
TOP CONTRIBUTIONS TO PROJECTS
raboof/notion
Notion: 2331 commits in 20 years 10 months
akka/akka
Akka: 856 commits in 7 years 11 months
raboof/connbeat
Connbeat: 449 commits in 2 years 2 months
Top skills
Score
reactive
10
streaming
10
akka
10

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20

Staff Software Engineer at Arteris
/
Switzerland
Rock Star
11 years of coding experience
TOP CONTRIBUTIONS TO PROJECTS
lampepfl/dotty
Dotty: 2628 commits in 8 years 10 months
smarter/dotty
Dotty: 1889 commits in 8 years 3 months
dotty-staging/dotty
Dotty: 777 commits in 7 years 8 months
Top skills
Score
scala
10
dotty
9
scala3
9

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