


What you will be Doing
- Design and build applications for the Android platform
- Ensure the performance, quality, and responsiveness of applications
- Collaborate with a team to define, design, and ship new features
- Identify and correct bottlenecks and fix bugs
- Help maintain code quality, organization, and automatization
What you need
- Expertise with Java, XML, and Material Design
- Experience with offline storage, threading, and performance tuning
- Familiarity with RESTful APIs to connect Android applications to back-end services
- Experience with Firebase is a plus (FCM, analytics) - Understanding of Android’s design principles and interface guidelines
- Strong communication skills, get-things-done attitude, and empathy
- Strong sense of ownership, drive and obsessive attention to detail. - Comfortable with iterative development practices and code reviews
- Previous experience as part of a product-oriented team is a plus
Why you should consider this role seriously?
- We have an audacious vision of helping companies fight counterfeiting and managing their supply
chain more efficiently
- We have built a product and solved problems for some of the largest brands in the country and
tested platform at scale (With our tags present in over 50 Million products already). We have plans to
grow 10x in the next 1 year
- Ownership of key problems. Fast-paced environment
- We are a well-balanced team of experienced entrepreneurs and are backed by top investors across
India and the Silicon Valley (Venture Highway, Startup Buddy etc.) - Competitive market salary
- Opportunity to work directly with the CEO, COO, CTO of the company
- A chance to interact with top-notch executives from multiple industries
- Open vacation policy (and we really mean it!) - Open Pantry
- As a team, we love to travel :). An off-site every quarter

About O4S
About
Connect with the team
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Urgent Hiring !!!
We are looking for Flutter Developer,
1 year of experience in developing native and cross-platform mobile applications
Knowledge of Flutter SDK, Getex, Provider, Android Studio and IntelliJ, Visual Studio Code,
SQLite, MySQL, and PostgreSQL databases
REST APIs
Experience with Git and Jira
Familiarity with Agile development approaches
Experience: 0.6 to 1 year
Location: Surat (full-time onsite only)
Thanks!



Proven experience building Mobile Apps using React Native.
Build pixel-perfect, buttery smooth UIs across both mobile platforms.
Leverage native APIs for deep integrations with both platforms.
Management of the application and its integration with back-end services.
Astute sense of User Interface and User Experience design
Managing large sets of data transfer between server and App.
Offline usage with sync capabilities.
Diagnose and fix bugs and performance bottlenecks for performance that feels native.
Reach out to the open source community to encourage and help implement mission-critical
software fixes
Maintain code and write automated tests to ensure the product is of the highest quality.
Transition existing React web apps to React Native.
Rock solid at working with third-party dependencies and debugging dependency conflicts.
Firm grasp of the JavaScript language and its nuances, including ES6+ syntax
Ability to write well-documented, clean Javascript code
Familiarity with native build tools, like XCode, Gradle
Understanding of REST APIs, the document request model, and offline storage
Experience with automated testing suites like Jest
Highly proficient in rendering components with Native APIs
Working experience with APIs and third-party libraries
Experience with FCM or similar.
Highly proficient in one or more libraries (e.g. Redux, React Router, etc) for state managing and
routing in addition to React.
Experience using Git as a control System

Sr. Android Developer
It is a digital consultancy that partners with the world's leading brands to design and deliver compelling digital products and services for their customers. It is a digital engagement provider for more than 200 of the world’s leading brands. We are a collective of consultants, designers, developers, cloud advisors, and data scientists - spread across 3 continents and 9 offices - who create compelling digital experiences to help clients show they care to the people who matter most - their consumers, patients, and employees.
We are seeking a Senior Android Developer with demonstrated experience designing and implementing enterprise scale mobile solutions. The ideal candidate will bring both strategic vision and solid execution skills to create native applications for mobile devices.
Responsibilities:
- Design and develop native mobile applications for Android
- Integrate mobile apps with RESTful web services
- Work with UX Designers, Mobile Architects and other Developers to build enterprise mobile solutions
- Work as part of an agile team on leading edge technologies
Skills and Experience:
- 5+ years experience developing applications software
- Excellent working knowledge of an objective oriented language (Java, C++, Objective-C, C#, or similar) - including 2+ years Java
- Android, Android Jetpack, Kotlin, Java, coroutines, MVVM, MVP, Pro-Guard, test cases, unit cases, Agile, Git, App Security
- Demonstrated expertise with the Android SDK
- Experience using RESTful APIs to integrate mobile applications to server side systems.
- Good understanding of software development best practices
- Experience working in an agile environment
- Working knowledge of SCM with strong emphasis on Git and proper Git Flow
- Must reference at least one application you developed that is available today.
- Knowledge of Hybrid technologies like : ReactNative, Ionic will be plus point.
Qualifications:
- Bachelor in Computer Science or equivalent work experience
- Good communicator and team player with strong organizational skills
- Ability to be proactive, find solutions and meet deadlines
- A good sense of humor and a passion for technology



- Significant experience working with React web and mobile along with tools like Flux, Flow, Redux, etc.
- In-depth knowledge of JavaScript, CSS, HTML, functional programming, and front-end languages
- Strong knowledge of React fundamentals such as Virtual DOM, component lifecycle, and component state
- A complete understanding of the full mobile app development lifecycle right from prototyping
- Knowledge of type checking, unit testing, typescript, prop types, and code debugging
- Experience working with REST APIs, document request models, offline storage, and third-party libraries
- Strong understanding of web technologies like JavaScript, HTML, and CSS
- Knowledge of user interface design and responsive designs
- Well-versed in a variety of React Native software and technologies such as Jest, Enzyme, ESLint, and so on

• Design And Build Applications
• Ensure The Performance, Quality, And Responsiveness Of Applications
• Collaborate With A Team To Define, Design, And Ship New Features
• Identify And Correct Bottlenecks And Fix Bugs
• Help Maintain Code Quality, Organisation, And Automatisation
What You Need
• Expertise With Flutter.
• Experience Of Connecting Backend With Frontend
• Familiarity With RESTful APIs To Connect Android Applications To Back-End Services.
• Integration Of Payment Gateway.
• Deployment of App on Play Store.
• Understanding Design Principles And Interface Guidelines
• Get-Things-Done Attitude, And Empathy
• Strong Sense Of Ownership, Drive And An Obsessive Attention To Detail.
• Comfortable With Iterative Development Practices And Code Reviews
• Previous Experience As Part Of A Product Oriented Team Is A Plus


Anju Siima Technologies Pvt Ltd. is a leading software company seeking creative and skilled developers to join our fast growing team. Our mission is to design and develop technology that improves the lives of its users, while providing an exceptionally high level of service to our clients.
We are looking for experienced developers who want to be part of a fast-paced, dynamic environment, where everyone’s opinions and efforts are valued. We hire outstanding professionals and give them the opportunity to thrive in a collaborative atmosphere that values learning, growth, and hard work.
Our team of 16+ professionals is working on Guntur and Hyderabad branch, Additionally, many of our team members who aren’t located near one of our offices, work remotely. We provide a highly competitive compensation and benefits package.
Job Description
We are looking for a Dart/Flutter Developer responsible for creating multi-platform apps for iOS and Android using Google’s Flutter development framework. The primary focus will be on creating new experiences and maintaining existing apps. Deep experience contributing to and managing high-scale production mobile apps. You must have previous experience in Flutter and Dart development.
Responsibilities
- Design & implement new app modules based on the product requirements using Flutter framework
- Maintain existing codebases
- Build reusable code and libraries for future use
- Integrate user-interfaces elements developed by other developers
- Build user interfaces designed by UI/UX designers
- Integration of data storage solutions
- Integrate various APIs from third parties
- Debug existing apps components, fix issues and avoid regressions
- Collaborate closely with the teams of UI/UX designers, PMs, QAs, and other developers
- Participate in software architecture, design discussions and code reviews
- Optimize application for maximum speed and scalability
- Follow the company guidelines and best practices
Skills And Qualifications
- You have a bachelor’s degree in computer science or related discipline
- Must have built at least two Android and/or iOS apps with Flutter
- Proficient in Java/Kotlin programming
- Knowledge and experience in Flutter Framework and DART programming
- Hands on experience in using RESTful APIs
- Hands on experience in designing and developing micro-services architecture and containers
- Experience with third-party libraries and APIs
- Hands on experience in designing and developing micro-services architecture and containers
- Object oriented analysis, UML and design using common design patterns.
- Hands on experience in development IDE Android Studio, Android SDK, Firebase Test Lab.
- Experience with offline storage, threading, and performance tuning.
- Experience with Mobile design patterns e.g MVVM, GoF, Bloc, Provider & etc.
- Experience in writing secure mobile applications (OWASP Mobile Top 10)
- Familiarity with push notifications
- Familiarity with IOS integration with Flutter
- Experience using GitHub or similar environment
- Complete understanding of SDLC
- Experience with Agile development
- Experience with Material Design and Android UI design principles, patterns and best practices
- Good knowledge of adding third-party libraries
- Ability to understand business requirements and translate them into technical requirements
- Working knowledge of the general mobile landscape, architectures, trends, and emerging technologies
- A track record of delivering successful complex consumer product apps (finance apps, e-commerce apps)

• Design and build applications for Android.
• Evaluate, architect solutions which work at scale.
• Bring best practices to the team, improve processes and bring efficiency to the workflow.
• Identify and execute tooling required to rid of the repeating/manual work.
• Take ownership, responsibility and deliver first class experience.
• Ensure the performance, quality, and responsiveness of the application.
• Collaborate with a team to define, design, and ship new features.
• Improve code review, code coverage for the project.
• Identify and correct bottlenecks and fix bugs in order to maintain code quality.
• Show leadership and focus on completion of projects.
What do we expect from you?
• Relevant industry experience of 5-plus years.
• Proficient in Data Structure and Algorithms
• Proficient in Java, Kotlin and concepts like Kotlin coroutines, Jetpack components.
• Good understanding of various Android tools, Systrace and Perfetto for performance measuring, memory management, battery, frame drops.
• Always on the lookout for new developments in the Android world and improving things.
• Familiarity with networking, databases, threading and memory concepts.
• Hands-on with code reusability, clean architecture, modularization, build time optimizations.
• Familiar with various third-party tools, libraries widely used and under the hood understanding.
• Understanding and hands-on with Material design principles and interface guidelines.
• Familiarity with cloud message APIs and push notifications.
• Proficient understanding of code versioning tools such as Git.
• Decent understanding of how things work at the backend, reporting and other systems.
• Good understanding of the various CI/CD tools.
• Should have experience in writing Unit and UI tests.
• Good at logical reasoning and data structure.

● Good understanding of areas such as Algorithms, Data Structures, ObjectOriented Design, Databases.
● Solid understanding of Android Architecture Components
● Understanding of large and complex code bases, including API designtechniques to help keep them clean and maintainable.
● Programming experience in Java, kotlin and related frameworks.


- 2+ years of hands-on programming experience in building native iOS apps, with deep focus on usability, performance, Core Data and integration with REST APIs & services.
- Built real world apps that are published on the app store.
- Experience in OO design, design patterns & fluency in Objective-C programming (exposure to Swift or React Native would be a plus)
- Experience working with iOS frameworks such as Core Data, Core Animation, Core Graphics and Core Text
- Experience with third-party libraries and APIs, consuming REST Web Services
- Unit/Integration tests
- Experience with third-party libraries and APIs
- Working knowledge of the general mobile landscape, architectures, trends, and emerging technologies
- Solid understanding of the full mobile development life cycle
- Strong knowledge of data structures, algorithms, and designing for performance UI development with Interface Builder and Code, including Auto Layout

