Firm grasp of the JavaScript and TypeScript or ClojureScript language and its nuances, including ES6+ syntax
Knowledge of functional or object-oriented programming
Ability to write well-documented, clean Javascript code
Rock solid at working with third-party dependencies and debugging dependency conflicts
Familiarity with native build tools, like XCode, Gradle Android Studio, IntelliJ
Understanding of REST APIs, the document request model, and offline storage
Experience with automated testing suites, like Jest or Mocha
Make sure to mention any other frameworks, libraries, or other technologies relevant to your project
List any education level or certification you may require

About Kretoss Technology
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About the Role
We are looking for a Senior Android Engineer with deep React Native expertise to build and own the trading
experience on Android — real-time data, interactive charting, fluid interactions, and rock-solid performance. What We’re Looking For
You have shipped production React Native apps that handle real-time data streams, complex UI states, and
performance-sensitive rendering. You understand the Android platform deeply — native modules, bridge
performance, and platform-specific behaviour. Ideally, you have worked on trading, fintech, or data-intensive
mobile products. You take ownership of your features end-to-end, care about code quality, and are comfortable
driving technical decisions independently. What You’ll Do
• Own the mobile trading experience on Android — architecture, performance, and end-to-end quality. • Build and optimize real-time data rendering — WebSocket lifecycle management, efficient list rendering, and minimal re-renders for streaming data. • Integrate complex WebView-based components with bidirectional JavaScript bridge communication. • Collaborate with product and design to deliver polished, intuitive interfaces for a financial product where
trust and clarity are paramount. • Define mobile engineering standards — component architecture, state management patterns, testing
strategy, and performance benchmarks. • Drive code reviews, mentor team members, and champion best practices across the mobile team. • Participate in stabilization and release cycles — profiling, device matrix testing, and regression analysis. Must-Have
• 4+ years React Native experience with production apps on Google Play Store. • Strong TypeScript skills and deep understanding of React Native internals — bridge, native modules, and
performance optimization. • Experience with real-time data handling — WebSockets, efficient UI updates for streaming data, and
state synchronization. • Experience integrating WebView-based components with JS bridge communication. • Proficiency with state management at scale (Redux, Zustand, or MobX).
• Experience with push notifications (FCM), deep linking, and complex navigation patterns. • Strong debugging skills — Flipper, React DevTools, native crash analysis, and performance profiling. Nice-to-Have
• Prior experience building trading, brokerage, or fintech mobile apps. • Experience with charting library integration in mobile apps. • Knowledge of server-driven UI (SDUI) patterns. • Experience with feature flags, A/B testing frameworks, and app modularization. • Familiarity with native Android development (Kotlin) for bridge modules. Tech Stack
Framework React Native
Language TypeScript / JavaScript
State Management Redux / Zustand
Real-time WebSocket, SSE
Charting Charting library via WebView bridge
Testing Jest, Detox (E2E), device matrix testing (Android 10+)
Software Development Engineer III (React Native)
Experience: 7+ years
About Wekan Enterprise Solutions
Wekan Enterprise Solutions is a leading Technology Consulting company and a strategic investment partner of MongoDB. We help companies drive innovation in the cloud by adopting modern technology solutions that help them achieve their performance and availability
requirements. With strong capabilities around Mobile, IOT and Cloud environments, we have an extensive track record helping Fortune 500 companies modernize their most critical legacy and on-premise applications, migrating them to the cloud and leveraging the most cutting-edge technologies.
Job Overview
We are seeking an experienced and passionate Mobile Software Development Engineer (SDE-3) with expertise in React Native. In this senior role, you will lead efforts to modernize legacy applications and develop new, high-performance mobile applications for large enterprise
clients and growth-stage startups. You will play a key role in mission-critical projects, working closely with business stakeholders, customer technical teams, and MongoDB Solutions Architects.
The ideal candidate will have strong technical leadership, system design expertise, and a track record of mentoring junior engineers. You will thrive in a fast-paced environment, driving the delivery of scalable, high-quality mobile applications.
Location - Chennai or Bangalore
Required Experience and Skills:
● 7+ years of experience in mobile application development, with at least 3+ years of hands-on experience working with React Native and TypeScript.
● Proven experience building high-performance mobile applications for
enterprise-grade solutions or high-traffic consumer apps.
● Solid understanding of mobile architecture, component design, and system performance optimization, with hands-on experience in testing, debugging, and performance tuning.
● Expertise in integrating RESTful APIs, third-party SDKs, and cloud services into mobile applications.
● Experience with state management libraries such as Redux or Context API.
● Strong proficiency in JavaScript (ES6+) and TypeScript, with a deep understanding of modern front-end development practices.
● Hands-on experience with mobile build tools, CI/CD pipelines, and version control systems.
● Strong problem-solving skills, attention to detail, and experience writing and maintaining clear, detailed technical documentation.
● Excellent verbal and written communication skills, with the ability to clearly explain complex technical concepts to both technical and non-technical stakeholders.
Good to Have Skills:
● Familiarity with Atlas Device Sync, Ditto, PowerSync, ObjectBox, or similar technologies for offline-first solutions and data synchronization in mobile apps.
● Experience with native mobile development (e.g., Swift for iOS, Kotlin/Java for Android).
● Familiarity with cloud platforms such as AWS, Azure, or GCP, and Mobile Backend-as-a-Service (MBaaS) solutions (e.g., Firebase, AWS Amplify).
Ideal for candidates who would like to be part of the learning process across growing technologies and embark journey on a tech architect path. Very deep into technologies and eager to learn and adapt with technology advancement.
Essential Responsibilities :
- Study, Design, and prototyping of new technology implementation
- Work in Collaboration with teams
- Work on new technologies and solutions independently.
- Should be able to think out of the box and contribute towards project success
Must Have :
- Build pixel-perfect, smooth UIs across both Android and iOS mobile platforms.
- Leverage native APIs for deep integrations with both platforms.
- Diagnose and fix bugs and performance bottlenecks for performance that feels native
- 3rd party Native SDK integrations
- Maintain versioning on the application and releases
Good to have:
- Knowledge of DevOps
2. Knowledge of different areas like UX / UI, Application / Infrastructure Architecture, Payment Gateways, Support etc. to build best in class product.
3. Oversee the architecture of a product to attain maximum efficiency
4. Conduct code reviews and specification conformance testing.
5. Establish an application deployment process.
6. Identify new technology trends and keep an eye on consumer’s evolving behavior on tech
7. Server side administration and Mobile app maintenance
8. Ability to design and architect new features in existing product
9. Plan infrastructure on cloud for future requirements
10. Testing and QA monitoring
11. Day to day management of team on work products, review effort estimates provided for the requirements
12. Ensure timely delivery based on discussed project pla
Wanted React Native Developer
We are looking for Junior and Senior React Native developer interested in building mobile apps for both the iOS and Android platforms.The candidate should be able to build high-quality, and performant applications with good coding standards and according to design.The developer must be skilled in development, writing clean and scalable code, and documenting functionality.
Experience
1 - 3 years
Education
Any Graduate
Location
Hyderabad
Candidate Requirements
- Experience with React Native skills such as Redux/Mobx, GraphQL, Animation, Authentication, etc.
- Must have built Mobile apps that are deployed to App store and google play store.
- Hands-on experience in using Hooks for functional components with the State, Pure Components , etc.
- Familiarity with native build tools, like XCode, Gradle Android Studio, IntelliJ
- Experience with automated testing suites, like Jest or Mocha
- Should have the ability to integrate third-party libraries and APIs.
- Familiarity with code versioning tools such as Git.
- Good knowledge of React Native and its core Principles.
Key Skills
- React Native
- Mobile Application Development
- IOS Development
- Javascript
- Android Development
- React.Js
● Working alongside other developers, product managers and designers
● Own a feature and bring it to the production application.
● Build pixel-perfect, buttery smooth UIs across both mobile platforms.
● Leverage native APIs for deep integrations with both platforms.
● Diagnose and fix bugs and performance bottlenecks.
● Maintain code and write automated tests to ensure the product is of the highest quality.
● Writing clean, readable, and testable code
● Hiring and leading team (Senior Web Developers)
Skills Required
● Must have hands-on working exp on React-Native and different packages.
● Strong working knowledge on React Native and Redux
● Experience on REST with JSON.
● Proficient understanding of code versioning tools, such as Git
● Experience in building and supporting high-performance applications
● Java/Swift Knowledge to create a native bridge is a plus.
● Prior experience with Firebase is a plus.
● Javascript, React Native, Software Architecture, Mobile Development, Unit Testing, Swift, Java
Developing new user-facing features using React.js/React Native
- Building reusable components and front-end libraries for future use
- Translating designs and wireframes into high-quality code
- Optimizing components for maximum performance across a vast array of web-capable devices and browsers
- Strong proficiency in JavaScript, including DOM manipulation and the JavaScript object model
- Experience with popular React.js workflows (such as Flux or Redux)
- Familiarity with newer specifications of EcmaScript
- Experience with data structure libraries (e.g., Immutable.js)
- Knowledge of isomorphic React is a plus
- Familiarity with RESTful APIs
- Knowledge of modern authorization mechanisms, such as JSON Web Token
- Experience with common front-end development tools such as Babel, Webpack, NPM, etc.
- Ability to understand business requirements and translate them into technical requirements
- A knack for benchmarking and optimization
- Ability to work through new and difficult React Native Issues and contribute to libraries as needed.
- Ability to create and maintain continuous integration and delivery of React Native applications.
Largest network of beauty and wellness store with over 150 stores across Bangalore, Chennai, Hyderabad, Cochin, Mumbai, Pune, Bhubaneswar and Kolkata. In addition to the stores, also have a strong online presence:
Job description:
Basic knowledge in Javascript, HTML, CSS
Knowledge in React JS, React native components
Latest Technology knowledge like hooks, Redux
Number of apps released/live in React native /Anroid & IOS, Business nature of the app
Understanding of deep react-native concepts
Understanding of advanced concepts like optimizing app
Understanding of security, deployment, app releases
- Understanding of support of app on multiple screens, android and ios versions, iterative development and enhancement of the app
React Native Developer
- Experience in React-native, IOS Development (with Swift).
- Experience in IOS SWIFT Framework
- Proven experience in React Native components in native iOS and Android
- Good understanding of Android / iOS / Web design guidelines, SDK and excellent JavaScript skills.
- Knowledge of React and the Java script ecosystem
- Exposure to other hybrid mobile platforms like IONIC,Sencha, HTML5, PhoneGap, jQuery Mobile etc.
- Familiarity with RESTful APIs development.
- Expertise with code testing best practices, including unit and integration testing to ensure quality of code.
- Familiarity with code versioning tools such as Git, SVN, Github.
- Excellent verbal and written communication skills
Preferred Skills & Knowledge: IOS Development (Swift), React Native
- Relevant experience in building a mobile application using React Native.
- Your primary focus will be on developing user interface components for mobile and implementing them following well-known React workflows. (such as Flux or Redux)
- You will ensure that these components and the overall application are robust and easy to maintain.
- You will be coordinating with the rest of the team working on different layers of the infrastructure.
- Should have published at least 2 live hybrid mobile applications.
- Good understanding of Android / iOS / Web design guidelines, SDK and excellent JavaScript skills.
- Expertise in RESTful APIs development.
- Expertise with code testing best practices, including unit and integration testing to ensure a quality of code.
- Familiarity with code versioning tools such as Git, TFS and Agile/SCRUM Development methodologies









