RxJava / RxSwift
Also written as RxJava, RxSwift, RxKotlin, RxAndroid, ReactiveX
Libraries for handling streams of events and background work (network calls, user input, timers) on Android and iOS, from the ReactiveX family. Very common in apps built roughly 2015–2020; new code has largely moved to Kotlin Coroutines/Flow on Android and Swift's async/await and Combine on iOS.
Think of it like
A conveyor-belt system for events: powerful once set up, but newer factories now use simpler belts built into the building.
Junior or senior?
Shows when someone's main mobile experience was.
Senior sounds like
Has migrated code from Rx to Coroutines or Swift concurrency and can explain how they did it safely.
Ask them
“Have you migrated code from RxJava or RxSwift to Coroutines or async/await? How did you do it without breaking things?”
Reading RxJava / RxSwift on a resume
- Table-stakes
- Most people in this field list RxJava / RxSwift, so its presence tells you little, and opening a screen with it can make the call sound junior. Ask what they built with it instead.
- Legacy
- RxJava / RxSwift still runs plenty of real systems, but heavy use often points to older or maintenance work. Ask when they last used it, and on what.
Sourcing for RxJava / RxSwift
Every way it's written
("RxJava" OR "RxSwift")Paste into LinkedIn Recruiter, Naukri or your ATS. Combine with a job title and location.
Wider net, with accepted substitutes
("RxJava" OR "RxSwift" OR "RxKotlin" OR "RxAndroid")Includes skills a hiring manager would usually accept instead. Use it when the exact search runs dry.
Job titles to search alongside it
Mobile Engineer · Android Developer · iOS Developer · Mobile Application Developer · React Native Developer
Where this talent works in India — Mobile Engineering
Target companies with a large installed base and frequent releases — consumer fintech, food and quick commerce, streaming and gaming. App-agency experience looks similar on paper and behaves very differently at scale.
For example: PhonePe, Swiggy, Eternal (Zomato, Blinkit), CRED, Dream11, JioHotstar, Truecaller, Paytm.