JOIN OUR TEAM

Senior Android developer

CallApp is growing and we are currently looking for a Mobile Android Developer to join our R&D dream team. Play a central role in building a brand new mobile features with the modern mobile toolkit and SW development best practices in mind.

Requirements

• 3+ years of Android Development experience (Java/Kotlin)
• Collaborated with a team to define, design, and ship new features
• Experience with Android Mobile App UI/UX design and development
• Experience with multithreading programming and mobile memory management
• Problem solver that can work independently, excellent communications skills

Bonus Points If You Have Experience In

• Experience writing Mobile SDKs
• Experience working Firebase Cloud technologies
• Familiar with the release process to Google Play store

Why join CallApp?

• Competitive salary
• Work with, and learn from, top-notch talent
• Take a central and critical role at CallApp
• Competitive equity
• Gym package
• Work-life harmony
• Dog friendly office

About CallApp:

CallApp is a Free Caller ID and Phone Call Blocker app that allows mobile users to block phone calls, identify telemarketing calls, record phone calls, blacklist unwanted callers and much more.
The App has not only been chosen by Google as one of the top Android apps, but it won several awards, supports over 200 countries, and is integrated with over 70 information sources.

Senior Android developer

CallApp is looking for a talented, top-notch senior backend developer with very high programming and design skills.
From designing the architecture, coding, deployment, monitoring and troubleshooting all backend related services serving our multi-millions users daily.

Requirements:
3+ years of experience in backend development.
Proficiency in Java programming and the Spring Framework – MUST.
Experience with Swift programming – MUST.
Experience with RESTful services and NoSQL databases.
Familiarity with cloud platforms (AWS and GCP) is a plus.
Experience with Spark and Cassandra is a plus.

Responsibilities:
Design, develop, and maintain over 50 backend servers using Java, Spring and Swift.
Collaborate with client side developers to integrate user-facing elements with server-side logic.
Develop and maintain backend services for our Android app and iOS app and back office services.
Optimize application performance, focusing on speed and scalability.
Write clean, maintainable, and testable code, following best practices for software development.
Troubleshoot and resolve production issues, ensuring the stability and reliability of the backend systems.
Stay up-to-date with the latest industry trends and technologies to continuously improve our systems.

About CallApp:
CallApp is a Free Caller ID and Phone Call Blocker app that allows mobile users to block phone calls, identify telemarketing calls, record phone calls, blacklist unwanted callers and much more.
The App has not only been chosen by Google as one of the top Android apps, but it won several awards, supports over 200 countries, and is integrated with over 70 information sources.

iOS QA Engineer

CallApp is seeking a skilled iOS QA Engineer to ensure the quality of our caller ID
and call blocking app serving millions of users worldwide. Help us deliver
exceptional iOS experiences across the Apple ecosystem.

What you’ll do:
Own the QA process for the entire iOS stack, including SwiftUI app, Call
Directory & CallKit extensions, Widgets, and Live Activities.
Review product specifications and technical designs, proactively identifying
potential testability issues and edge-case scenarios.
Create clear and detailed test plans, as well as exploratory test charters,
covering a range of iPhone form factors and scenarios.
Perform comprehensive manual testing, including functional, usability,
accessibility, and network condition testing.
Clearly trace, reproduce, and document issues using Jira, supported by videos,
logs, and precise reproduction steps.
Execute thorough regression testing on every release candidate and validate
hotfixes via TestFlight.
Monitor production environments (Crashlytics, Firebase, Analytics), analyzing
issues and collaborating with engineers on root cause investigations.
Advocate for best practices in quality engineering and contribute actively to our
growing QA team.

What you bring:
Strong communication skills and meticulous attention to detail.
2+ years of experience in iOS mobile QA.
Hands-on experience testing consumer facing iOS applications.
Nice to have (Big Plus):
Familiarity with CallKit, Contacts, VoIP, telecom systems, or spam blocking
domains.

Expertise in performance analysis, battery consumption, and memory profiling.
Proficiency in Swift programming and scripting in Bash for automation and
tooling.
Previous experience working with apps used by millions of users.

Why join CallApp?
Impact at scale: Your work directly protects millions from spam calls and
shapes a modern, legacy-free iOS codebase.
Top-tier team: Collaborate daily with passionate, experienced iOS engineers
who deeply value quality.
Financially strong and growing: Profitable business with a global presence,
offering ample greenfield opportunities for innovation.
Competitive benefits: Attractive salary, dog friendly workspace, and gym
facilities.

About CallApp:
CallApp is a Free Caller ID and Phone Call Blocker app that allows mobile users to block phone calls, identify telemarketing calls, record phone calls, blacklist unwanted callers and much more.
The App has not only been chosen by Google as one of the top Android apps, but it won several awards, supports over 200 countries, and is integrated with over 70 information sources.