Android 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

Should have min 2+ years of Hands-on experience in React Native development.

• Knowledge of REACT tools including React.js, Webpack, Enzyme, Redux, and Flux
• Experience with JavaScript, Typescript, CSS, HTML5 and front-end languages.
• Good understanding of Android/ iOS design guidelines, SDK.
• Exposure to building React Native components in native iOS and Android.
• Solve complex technical, scalability or performance challenges.
• Familiarity with code versioning tools such as Git, SVN, Gitlab.

Requirement: -

• Managing a team of 3-4 engineers 
• Hands on experience in Web applications and Mobile applications.
• 2+ years of professional experience working with React Native.
• 4+ years of professional software development experience.
• Should have experience in React.js as well
• Experience working with Swift, Objective C, and Java a plus.
• Meaningful experience working on large, complex systems.
• Familiar with Agile development methodology
• Should have strong fundamentals in React Native
• Should be good at Languages React Native, iOS, Android mobile
• Should be well versed with mobile application architecture
• Ensure and apprise stakeholders of technical feasibility, effort, and impact of implementations.
• Interact with clients to understand requirements.
• Able to convert business requirements to sizable tasks for developers to implement.

e are looking for a strong mobile app developer who welcomes both engineering and maintenance tasks. The primary focus will be to implement new user interfaces and features together with automated unit and integration tests.
You will be working with our candid and collaborative team, where your knowledge and advice about application architecture and the newest mobile technologies will be highly appreciated. The code you write will need to be cleanly organized and of the highest quality. You’ll also help ensure solid application performance and an excellent user experience.

Skills and Qualifications
Deep Knowledge in Flutter with 2+ years of active development.
Extensive knowledge about mobile app development. This includes the whole process, from the first line of code to publishing in the store(s)
Familiarity with RESTful APIs and mobile libraries for networking
Familiarity with the JSON format
Experience with profiling and debugging mobile applications.
Familiarity with Git, Firebase and push notifications systems
Duties and Responsibilities
Developing new features and user interfaces from wireframe models
Ensuring the best performance and user experience of the application
Fixing bugs and performance problems
Writing clean, readable, and testable code
Cooperating with back-end developers, designers, and the rest of the team to deliver well-architected and high-quality solutions.
Knowledge on native android and ios development would be an added advantage.

We are hiring a  Flutter developer to engineer applications that will run across Android, iOS, and the web. We are looking for someone passionate about performance, reliability, and design with the experience and credentials to back up that passion. Someone who can take ownership of applications, solve technical challenges and take pride in their solutions and code.

The ideal candidate will have experience building native applications, JavaScript knowledge, and a portfolio of applications already published either in the app store or self-hosted.

You’ll be a key member of the team tasked with contributing to a number of high-value projects within Marj Technologies.

Qualifications

• Have two or more iOS/Android apps developed with Flutter. Either deployed on the AppStore/Google Play or available on Github.

• Over one year of experience with developing Flutter applications for mobile and web.

• Experience with third-party libraries and APIs.

• Understanding of the Agile development life-cycle.

• Experience with automated testing and building.

• Experience with Git and Github.

• Proven experience in writing readable code, creating extensive documentation for

  existing code and refactoring previously written code.

• Well-versed with Flutter Null Safety and Bloc architecture.

• Good communication & Problem-solving skills.