23,015 companies in our data use MapReduce, and 2,688 of them name it in job posts they wrote. Its share of job posts is shrinking, though 2,933 job posts still named it from October 2025 to August 2026. Data Engineer roles mention it most.
Which companies name MapReduce in the most job posts?
Capital One has posted more jobs naming MapReduce than any other company: 2,605. Of the five companies in the table, Apple has the most employees who list it on their profiles: 882.
CompanyPostsPeopleRecent job post
Capital OneFinance and Insurance · first seen Jul 20222,605359
"5+ year’s experience with Distributed data, computing tools (MapReduce, Hadoop, Hive, EMR, Kafka, Spark, Gurobi, or MySQL)"Principal Associate - Data Engineer, Oct 8, 2026
Booz Allen HamiltonProfessional Services · first seen Jul 20221,11244
"2+ years of experience with distributed data or computing tools, including MapReduce, Hadoop, Hive, EMR, Kafka, Spark, Gurobi, or MySQL"data scientist, Nov 7, 2026
EPAM SystemsProfessional Services · first seen Aug 2022344195
"Hands-on expertise in Big Data technology stacks such as Hadoop, Yarn, HDFS, MapReduce, Hive, Spark, Kafka"Senior Director of Data Delivery, Sep 15, 2026
AppleScientific and Technical Services · first seen Jul 2022330882
"Utilizing MapReduce to develop efficient large scale data pipelines."Machine Learning Engineer, Mar 3, 2026
VisaFinance and Insurance · first seen Aug 2022315265
"Passion for Big Data and analytics in general leveraging technologies like Hadoop, Spark, Solr, MapReduce."Lead SW Engineer - IC - Risk and Identity Solutions, May 27, 2026
Job posts mentioning MapReduce went from 1.7 to 1.4 in every 10,000 job posts, comparing March to May with June to August 2026. From October to December 2025 it was 1.4.
Show the data
Month
Job posts naming MapReduce
All job posts
Per 10,000
Oct 2025
194
1,413,673
1.4
Nov 2025
261
1,822,119
1.4
Dec 2025
175
1,236,103
1.4
Jan 2026
322
1,828,002
1.8
Feb 2026
284
1,856,647
1.5
Mar 2026
302
1,850,711
1.6
Apr 2026
313
1,728,886
1.8
May 2026
281
1,821,509
1.5
Jun 2026
286
1,909,496
1.5
Jul 2026
247
1,815,180
1.4
Aug 2026
268
1,835,698
1.5
How many companies named MapReduce in a job post for the first time in recent months?
In the three months to August 2026, 35 companies posted about MapReduce for the first time. From March to May, 42 did. The 35 from June to August are 1.3% of all 2,688 companies whose job posts name it.
March to May 202642
June to August 202635
October 2025 to August 2026178
Companies whose first job post naming it appeared in that period. Recruiters, staffing firms and job boards are left out.
How do we know which companies use MapReduce?
Of the 23,015 companies here, 20,327 are known from what employees list on their profiles. 1,104 show up in both job posts and employees' profiles.
How we knowCompaniesShare
Job posts name MapReduce
2,68812%
Employees' profiles list MapReduce
20,32788%
23,015 companies. Each is counted once, under the strongest evidence we have for it.
What size are the companies that use MapReduce?
MapReduce skews toward smaller firms. 26% of its users are companies with fewer than 50 employees, against 22% on the typical tech page. 2,771 of its companies have more than 5,000 employees.
Share of its companies
Typical tech page
ShareTypical
Under 50 employees
26%22%
50 to 999
44%38%
1,000 to 5,000
18%17%
Over 5,000
12%23%
Where are MapReduce companies based?
47% of MapReduce companies are based in the United States, and 8.4% in India. Its companies are based in 148 countries and territories.
ShareTypical
United States
47%43%
India
8.4%6.9%
United Kingdom
5.2%6.4%
France
4%4.6%
Canada
3.6%3.6%
Germany
3.2%4.4%
Companies in 148 countries and territories. Shares are of companies with a known headquarters country.
Show the data
Country
Companies
Share
Typical tech page
United States
10,231
47%
43%
India
1,819
8.4%
6.9%
United Kingdom
1,137
5.2%
6.4%
France
880
4%
4.6%
Canada
795
3.6%
3.6%
Germany
692
3.2%
4.4%
Which teams work with MapReduce?
Data engineering teams are the most common home for MapReduce, at 58 companies, followed by data science and data. Engineering teams come fourth, at 20 companies.
TeamCompanies
Data engineering
58
Data science
47
Data
24
Engineering
20
Data & analytics
17
Big data
15
What else do MapReduce companies use?
MapReduce companies are 52 times as likely as similar companies to use Apache Flume: 13% of them, against 0.25%. Apache Oozie comes second, 42 times as common as usual, at 13%.
Share of the 1,530 MapReduce companies counted here whose job posts also name the tool
Typical for companies the same size
Which companies started naming MapReduce in job posts recently?
Between April and August 2026, 36 companies with 50 or more employees first named MapReduce in a job post, 10 of them with more than 5,000 employees. Global Software Solutions Group has the most job posts of the new commercial companies, 5 from April to August.
Companies that named MapReduce in a job post for the first time between April and August 2026, ranked by their job posts in those months. AI-native companies get a group of their own, whatever their size. Recruiters and job boards are left out.
Which roles mention MapReduce most?
MapReduce shows up across many roles. The top one, Data Engineer, has 28% of the job posts. Data Scientist is second, at 18%.
RoleSharePosts
Data Engineer
28%831
Data Scientist
18%540
Software Engineer
12%349
Machine Learning
4.4%128
Data Entry
2.7%78
AI Engineer
2.4%69
Show the data
Role
Share
Oct 2025 to Aug 2026
Mar to May 2026
Jun to Aug 2026
Data Engineer
28%
831
228
192
Data Scientist
18%
540
195
177
Software Engineer
12%
349
117
91
Machine Learning
4.4%
128
39
15
Data Entry
2.7%
78
18
28
AI Engineer
2.4%
69
19
28
Which project themes come up in MapReduce job posts?
3,857 job posts naming MapReduce describe broad digital transformation, and 674 describe Data Infrastructure Migration work. After that comes Cloud Migration, with 249.
Project themeJob posts
Digital Transformation3,857
Data Infrastructure Migration674
Cloud Migration249
Microservices Migration164
About this data
Sumble built this page. Sumble gives sales, marketing and other GTM teams technographics and hiring signals for the companies they sell to: the technologies each company uses, which teams are hiring and for what, and who reports to whom. That helps a team know who to contact, why now, and what to say.
Sumble covers more than 3.6 million companies, 93 million job posts collected since 2022 and 194 million employee profiles, and tracks more than 37,000 technologies. It finds which technologies a company uses by reading its job posts and its employees' public profiles.
Sumble has a free plan, and the same data is available through its API and MCP server.
A company counts when its own job posts or its employees' public profiles name the technology. Hiring is that technology's share of all job posts collected each month. Quotes are copied word for word from the companies' job posts.
Every figure on this page comes from Sumble's own analysis, and you won't find it outside Sumble.
