Kotlin Developer

Android Full-Stack Engineer

📍 Location: Remote

💼 Type: Full-Time

💰 Salary: $800 - $1,000 USD / month

📩 Apply Now at: https://forms.gle/1XrseYnbCUsJDDuTA

About Us

At Momenta, we're committed to creating a safer digital world by protecting individuals and businesses from voice-based fraud and scams. Through innovative AI technology and community collaboration, we're building a future where communication is secure and trustworthy.

Position Overview

We’re looking for an experienced Android Full-Stack Developer to help us bring our user-facing Android app to life. You’ll work closely with our design and engineering teams to build out our map-based UI and integrate key features that power voice scam detection and reporting.

Key Expectations

📌 End-to-End Android Client

• Take our existing codebase from prototype to production-grade
• Implement core features: secure login flows, background call listeners (VoIP/SIP), real-time UI feedback on fraud scores, and call history dashboards
• Optimize across devices for CPU, memory, battery, and low-latency audio processing
• Handle permissions, call audio capture, and background service behavior
• Launch and manage app distribution via Google Play

📌 Serverless Backend & API Development

• Design, build, and maintain AWS-based microservices using Lambda, API Gateway, DynamoDB, and S3
• Implement endpoints for audio streaming, ML model inference (via AWS SageMaker or custom endpoints), and event logging
• Define REST/WebSocket contracts and integrate with Twilio or SIP gateways for VoIP call control

📌 Performance, Security, and DevOps

• Ensure real-time responsiveness and scalable audio data processing
• Implement robust CI/CD pipelines using Git and Gradle
• Build secure auth flows using OAuth/token-based authentication
• Apply best practices in encryption, permissions, and Android security architecture

📌 Cross-Team Collaboration

• Work closely with our CTO and product team to align implementation with roadmap
• Provide clear technical insights, raise blockers, and proactively recommend solutions
• Document backend services and client workflows for maintainability

Required Skills & Qualifications

🎯 Android Expertise

• Kotlin & Java, Android Studio, Jetpack libraries (WorkManager, Room, LiveData)
• Material Design, custom views, background services, and VoIP call handling
• Experience launching Android apps on Google Play

🎯 Backend & DevOps Proficiency

• AWS Lambda, API Gateway, DynamoDB, S3
• Node.js, Python, or similar backend experience
• REST and WebSocket API development
• CI/CD pipelines, Git, Gradle, Serverless Framework

🎯 VoIP & Audio Experience

• Familiarity with SIP/WebRTC, call audio capture, Twilio integrations
• Experience with background audio services and event-driven processing

🎯 Security & API Design

• OAuth/token-based auth
• Secure mobile data handling and encryption in transit
• Android permission model and security best practices

🎯 Bonus

• Experience with AWS SageMaker or deploying custom ML endpoints
• Prior experience with real-time event processing or analytics in telecom or fraud detection

Why Join Momenta?

Work on a real product with a clear mission—protecting users from voice scamsShip a full-stack mobile experience that will be used globallyCollaborate directly with founders and see your work go liveRemote-first, builder-led team with deep focus on product delivery

🚀 Apply now and help shape the future of voice security

Job Description:

• Work closely with various people and teams throughout the entire app development cycle (concept, design, build, deploy & test) in an agile environment.
• Design and build applications for the Android platform.
• Ensure the performance, quality, and responsiveness of applications.
• Identify and correct bottlenecks and fix bugs.
• Help maintain code quality, organization, and automatization.
• Knowledge of other web technologies and UI/UX standards.
• Familiarity with cloud message APIs and push notifications.
• Proficient understanding of code versioning tools like Git.
• Maintain and update the existing mobile app.

Reporting Structure

• This position reports to the Team Leader - Technology.

Job Specifications

• An Graduate in IT or Post graduate or Engineer in IT; with 4+ years’ of relevant experience.
• Minimum 2 years of experience in Flutter is a must.
• Familiarity with RESTful APIs to connect Android applications to back-end services.
• Excellent communication and interpersonal skills.
• Strong problem solving, analytical, decision making and technical ability.

React Native Role :

We are looking for a qualified React Native developer to join our Engineering team. Ultimately, you should be able to design and build the next generation of our mobile applications.

What is expected of our App Developers?

1. Understand the healthcare context and identify key problems
2. Innovate, evaluate, and deploy various android and IOs Features that can solve complex healthcare needs
3. Ability to take extreme ownership over your work. Every day is a challenge to ensure you are performing to the expectations you and your team have agreed upon, both in regards to estimates and to general process. An understanding of React Native best practices and acommitment to following them.
4. Ability to create and maintain continuous integration and delivery of applications.
5. A positive mindset and can-do attitude.
6. Forensic attention to detail.

Qualifications:

1. Bachelor’s degree in CS/IS.
2. Experience with React Js, React Native, JavaScript including DOM Manipulation and

JavaScript object model.

1. Thorough understanding of React Native and its core Principles.
2. Hands on experience on React Native Framework at least 2 years.
3. Good Knowledge of HTML5, CSS.
4. Familiarity with code versioning tools (Such as Git, SVN or Mercurial)
5. Familiarity with RESTful APIs
6. Familiarity with modern front-end build pipelines and tools.
7. Experience with common front-end development tools such as Babel, Web pack, NPM etc.

10.Experience with Native Mobile app deployment on App store and google play store.

Own Android SDKs, working hand-in-hand with the founding team

Design and build delightful user interfaces for native apps on Android

You will be (co-) responsible for our software development kit (SDK) for Android

Building mobile apps in both Swift and Kotlin.

You work independently on your own code, but you also spend time collaborating with others.

You are involved in all stages of app development and contribute to the roadmap.

You get the freedom to experiment with new Android technology.

Ownership — advocate for projects and solutions that need to be launched ground up.

Experience

Min 2 to 4 years in developing Android applications in Java / Kotlin / C++ /Gradle/Groovy.

Worked on SDKs/Frameworks.

Strong understanding of software design patterns as well as Android specifics.

Experience with authenticated sessions using authentication tokens and have at-least

fundamental knowledge of app security.

Good to have:-

Experience with Cross-platform frameworks is a plus (React Native, Flutter, Cordova,

Xamarin).

Have implemented security standards and guides.

Experience building applications at scale.

Experience with third-party libraries and APIs like Mobile Vision, MLKit and/or

Camera API.

Good understanding of garbage collection, design patterns and continuously

discover, evaluate,and implement new technologies to maximize development efficiency.

Unit-test code for robustness, including edge cases, usability, and general

reliability

• Candidate Must be well versed with latest SDK versions, XCode, Objective C, Swift, UIKit, Cocoa etc.
• Expertise in integrating web services (XML/ JSon etc.) with iPhone applications.
• An experience in using Maps API, GPS services for iPhone/ iOS apps is required.
• Experience with third-party libraries and APIs.
• Working knowledge of the general mobile orientation, architectures, trends, and emerging technologies.
• Experience working with iOS frameworks such as Core Data, Core Animation, Core Graphics and Core Text, Core Location.
• To take care of build and release process (Adhoc releases, Final release).
• Should have worked on cocoa touch, story board, core data, auto layout.
• Hands-on experience in Cloud APIs, push notifications, social media integration, and integration of analytics is an added advantage.
• Must have good analytical, debugging, App publishing and problem solving skills.
• Self-starter having the ability to independently acquire the knowledge required in succeeding his job.

About the role: One key differentiator of FabHotels brand for our asset partners is bestin-class returns. While our online & offline demand teams drive higher occupancies for our partners, this role entails ownership of developing and work on react native side of application development.

Key responsibilities:

• Knows how to embed React-Native in a native (iOS/Android) component and vice versa.
• Firm grasp on JS/CSS fundamentals
• Build pixel-perfect, battery smooth UIs ((layouts, animations, etc.))across both mobile platforms
• Good understanding of Design and Architecture Patterns
• Strong focus on app performance
• Familiarity with native build tools, like XCode, Grade (Android Studio, IntelliJ)
• Good in debugging
• Experience in iOS app development is preferable.

Individuals who would connect best with the job requirements are those who:

• Are excited to be part of a young, dynamic team that is building a disruptive, sustainable business
• Are willing to go the extra 100 miles it takes to win in a super competitive market
• Are innovative, resourceful and comfortable with dynamic business requirements
• Fulfil below minimum criteria:

- 1+ years experience in React-Native based app development  

- 1-2 years experience in Mobile app development(React-Native + iOS).         

- Hands on experience in Redux