Mobile 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

Platform they will work on: Building multiple tech offerings for the customers.

Job Description: Should be someone who has done iOS mobile development with React Native. Should have a startup mindset and be able to build for scale. The ideal candidate would be someone with Founding Engg etc. experience.

YoE: 4-6 years

• Experience in mobile application development 
• Experience in Objective C, Swift, XCode, etc
• Experience in developing/programming mobile apps on iOS platform
• Experience in lead development of IOS development
• Strong CS fundamentals,

• Leads more than one projects end-to-end and collaborates across functions. Drives planning, estimation and execution.
• Manages stakeholder expectations and offers scalable, reliable, performant and easy to maintain solutions.
• Consistently takes well thought technical/design decisions.
• Develops expertise in more than one area and shares knowledge with others. Able to mentor/train people in areas which are new to them.
• Drives people to solve engineering challenges.
• Enjoys high respect of Tech and other cross functional teams.
• Demonstrates effective communication with project team, management and internal/external clients as necessary.
• Surfaces both technical and non-technical team challenges and helps resolve them.
• Champion for SDLC best practices and high-quality standards.
• Significantly contributes in hiring high performance candidates.

• Expert in JAVA, Kotlin, Reactive programming, Asynchronous programming and Dependency Injection. Experience with unit-tests and automation frameworks.
• Familiarity with any architectures like MV*(MVP/MVVM/MVI).
• Strong focus on high-quality mobile UI experiences.
• Operates independently with almost no oversight.
• Is able to apply domain expertise to think critically and make wise decisions for the team, taking into account tradeoffs and constraints.
• Communicates tech decisions through design docs and tech talks.
• Has delivered multiple projects with end-to-end engineering ownership.
• Keeps track of new technology/tools and embraces them as necessary
• 12+ years of experience in a product-driven organization.

Technologies we're working with

• MVP, JAVA and Kotlin, Realm, Firebase Real-time Database, RxJava,Kotlin Coroutines, Dagger and Retrofit.

Office Location: Goregaon Mumbai

Position description:

2+ years of development experience with mobile application development for Android.

Primary Responsibilities:

• Work closely with the core team for coming up with new features and implementing them
• Work on new products and services
• Provide support to existing applications
• Integrate REST services into mobile applications

Required Skills:

Mandatory: Passionate about sports, Problem solving, Team player, Target & Result oriented.

Functional Skills: Kotlin, Retrofit, Room Db, GSON, (Room/SQLite), MVVM, MVP, MVC, Work Manager, Rx java, Dagger 2, Recyclerview, Custom Solutions & Custom Views, GIT & JIRA.