

Android Full-Stack Engineer
š Location: Remote
š¼ Type: Full-Time
š° Salary: $800 - $1,000 USD / month
š© 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
Weāre looking for an experiencedĀ Android Full-Stack DeveloperĀ to help us bring our user-facing Android app to life. Youāll 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
š 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
š 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
š 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
š 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
šÆ 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
šÆ 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
šÆ VoIP & Audio Experience
- Familiarity with SIP/WebRTC, call audio capture, Twilio integrations
- Experience with background audio services and event-driven processing
šÆ Security & API Design
- OAuth/token-based auth
- Secure mobile data handling and encryption in transit
- Android permission model and security best practices
šÆ 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 missionāprotecting 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
š Apply now and help shape the future of voice security

About Momenta
About
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.
Candid answers by the company
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.
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