middleware

Application communication layer

Middleware is software that sits between an operating system and the applications running on it, handling communication, data management, or other services that multiple programs need.

In web development, middleware intercepts requests before they reach their destination, performing tasks like authentication or logging: The middleware checks if the user is logged in before allowing access.

The term emphasizes the software's position—neither the foundation nor the final product, but the connective layer in between.

integration

API

Software communication standard

interoperabilityCross-platform functional harmony
servicesActs performed for others
abstractionDistilling to essential qualities

orchestration · adapter · gateway · bridge · connector · routing · mediation · workflow · choreography · pipeline

infrastructure

servers

Machines providing network resources

platformRaised flat structure
runtimeProgram execution duration
frameworkUnderlying support system

container · cluster · cache · queue · web-server · proxy · sidecar · ingress · egress · failover

messaging

event-driven

Triggered by occurrences

asynchronousNot happening together
brokerTransaction intermediary for hire
producerOne who makes things

consumer · topic · channel · notification · callback · webhook · streaming · buffer · Kafka · socket

enterprise

mainframe

Large centralized computer system

legacyWhat's passed down
TuxedoNew York settlement
SAPBusiness software giant

ERP · rollback · recovery

Categories

JavaJDK, JAR, JVM, bytecode, packages
softwaresoftware, app, apps, application, program
techsoftware, hardware, code, coding, programming
IT Infrastructurecloud computing, data center, virtual machine, server, VM
IT systemssoftware, server, hardware, servers, databases
software developmentcoding, programming, bug, debug, debugging

Opposites

software stack position

middlewarefrontend

User interface layer

user interface · hardware · backend · operating system · kernel

directness of user/hardware interaction

middlewareembedded system

Dedicated computer within machinery

desktop application · mobile app · web application · code · programming

directness of function

middlewareendpoint

Final point reached

Family

middle, middleman, middling, ware, middles, midfielder, middlemen, middlebrow, middleweight

Familiarity: Top 500,000
Profile: Used worldwide · Timeless · Abstract · Rated G