React Native 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: Senior App Developer – React Native

About the firm:

Sustainability lies at the core of Stantech AI, our vision is to empower organisations to derive actionable insights: effectuating a smarter way of working. We operate on the premise that each firm is unique and as such requires its own idiosyncratic solutions. Putting this principle into practice, we deliver tailor made solutions to digitalise, optimise, and strategise fundamental processes underpinning the client organisations. For more information, please refer to our website: www.stantech.ai.

Position Overview

We are seeking a skilled React Native Mobile Developer with a minimum of 3 years of professional experience to join our dynamic team. The ideal candidate will have a strong design sense and proven expertise in developing scalable, high-performance mobile applications—especially in the enterprise domain (e.g., sales team apps, sales CRM, purchase modules, and similar solutions). You will work closely with our cross-functional teams to translate requirements into compelling features and ensure seamless user experiences.

Key Responsibilities:

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Design & Development: Build and maintain robust, efficient, and scalable mobile applications using React Native for both iOS and Android platforms.

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Collaboration: Work with cross-functional teams (Product, Design, QA, etc.) to identify user needs and incorporate feedback effectively.

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Code Quality: Write clean, maintainable, and well-documented code. Follow best coding practices and maintain compliance with organizational guidelines.

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Performance Optimization: Optimize app performance for speed and responsiveness; troubleshoot and debug to maintain smooth user experiences.

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Integration: Collaborate with backend teams to integrate RESTful APIs and other third-party services into mobile applications.

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Continuous Improvement: Stay updated with the latest industry trends and best practices in mobile development, ensuring the continuous improvement of apps.

Skills and Qualifications:

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Bachelor’s degree in Computer Science, Information Technology, or a related field.

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Proven experience as a React Native Developer with a strong portfolio of released applications on the App store or the Android market.

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Strong proficiency in JavaScript, including DOM manipulation and the JavaScript object model.

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Knowledge of mobile app development life cycle, and experience with performance and memory tuning tools.

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Strong understanding of handling various mobile device capabilities such as GPS, battery optimization, and data connectivity toggles (e.g., airplane mode).

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Familiarity with cloud message APIs and push notifications.

Financial Package:

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Rs. 10-20 Lakhs per annum, contingent on work experience.

Apply - https://forms.gle/J7u9jjTsibERDGqs5

Position: IOS Developer
 

Android Mobile Developer

The ideal candidate will be passionate about providing the best experience to our user community from UI/UX design to speed and performance.  You will think critically to develop native apps for Android mobile devices.  You’ll instrument, measure, optimize and build high quality architectures and code in areas such as Search, Transaction Management and Profile Management.

General Responsibilities:

• End-to-end Android application development that will produce elegant features that our users will love
• Coding alongside the team (comprised of designers and product managers) developing features for our mobile apps
• Produce high quality software that is unit tested, code reviewed, and checked in regularly for continuous integration.
• Understand where to make architectural trade-offs applying synchronous and asynchronous design patterns
• Provide solid feedback on good mobile UI/UX design practices and ways to reduce any user friction

Requirements:

• 5+ years developing extensively with Java 
• 7+ years experience in software design, development, and algorithm related solutions
• Knowledge of UI and animation frameworks, touch user interface, and MVP application design
• Strong expertise in developing enterprise mobile applications using Google’s Android SDK( e.g. packaging, emulators, adb, etc)
• Familiar with deploying to Google’s app store and staged rollouts
• Extensive programming experience in Java and/or Kotlin
• Experience with relational databases (transactional and non-transactional), database architecture, and distributed transaction management
• Experience with consuming third-party libraries and APIs
• Strong understanding of working with REST services, databases, caching strategies & asynchronous calls is a must
• Good understanding of software development lifecycle along with working knowledge of SCM with strong emphasis on Git and Jira
• BA/BS Degree in Computer Science or related technical discipline, or related practical experience.

• Design and build advanced applications for the Android platform.
• Collaborate with cross-functional teams to define, design, and ship new features.
• Work with outside data sources and APIs.
• Unit-test code for robustness, including edge cases, usability, and general reliability.
• Work on bug fixing and improving application performance.
• Continuously discover, evaluate, and implement new technologies to maximize development efficiency

We are looking for a hands-on Android Developer to join our mobile team. The apt applicant must have Android software development skills, a passion for delivering high-quality, rock-solid apps. Android programming works closely with other app development and technical teams.

• Translate designs and wireframes into high-quality code.
• Design, build and maintain high performance, reusable, and reliable Java and Kotlin code
• Ensure the best possible performance, quality, and responsiveness of the application.
• Identify and correct bottlenecks and fix bugs.
• Help maintain code quality, organization, and automatization.

An enthusiastic individual with the following skills. Please do not hesitate to apply if you do not match all of it. We are open to promising candidates who are passionate about their work and are team players.

• Bachelor's degree or higher in Computer Science and minimum 4 years of Software Development experience- Knowledge of Mobile automation and experience on platforms such as espresso
• Knowledge of application profiling and performance monitoring tools such as Android profiler, AppDynamics, Dynatrace, etc.
• Excellent coding skills in an object-oriented language such as Java and Kotlin.
• Experience with offline storage, threading, and performance tuning
• Have published at least one original Android app.- Understanding of Google's Android design principles and interface guidelines- Strong knowledge of Android UI design principles, patterns, and best practices

You will be working with top-quality engineers who have built one of the best employee engagement SaaS platforms. You will be reporting to AVP Engineering and working closely with the Architect and other leads.

A wholesome opportunity in a fast-paced environment that will enable you to juggle between concepts, yet maintain the quality on content, interact and share your ideas and have loads of learning while at work. Work with a team of highly talented young professionals and enjoy the benefits of being at Xoxoday.

A fast-growing SaaS commerce company based in Bangalore with offices in Delhi, Mumbai, SF, Dubai, Singapore and Dublin. We have three products in our portfolio: Plum, Empuls and Compass. Xoxoday works with over 1000 global clients. We help our clients in engaging and motivating their employees, sales teams, channel partners or consumers for better business results.

We look forward to connecting with you. As you may take time to review this opportunity, we will wait for a reasonable time of around 3-5 days before we screen the collected applications and start lining up job discussions with the hiring manager. We however assure you that we will attempt to maintain a reasonable time window for successfully closing this requirement. The candidates will be kept informed and updated on the feedback and application status