We’re currently looking for rockstar developers to help us build a next-gen social audio community engagement platform. Avalon is hiring for both backend & frontend engineering roles. Our tech stack is majorly Ruby on Rails & React Native.
If you were looking for a rocket ship, this is it!
As a senior front-end developer, our primary requirement is that you are proficient in React Native.
Apart from that the job entails:
- Building new features (while squashing bugs) for our growing mobile app to extend device support especially across the Android ecosystem
- Architect elegant and maintainable code with support from the team
- Collaborate with design, data, and other teams to build beautiful interfaces that look great and run smoothly
- Guide and improve the technical direction of mobile, bolstering the technical foundational, improving performance, and re-architecting.

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Job Profile: React Native Developer (2+ Years Experience)
Location: Kolkata
Work Mode: Work From Office
Experience Required: 2+ Years
Employment Type: Full-Time
Job Description
We are looking for an experienced React Native Developer with 2+ years of hands-on experience to join our mobile development team in Kolkata. The ideal candidate will be responsible for building high-quality, scalable, and performance-optimized mobile applications for Android and iOS platforms.
Key Responsibilities
- Develop and maintain cross-platform mobile applications using React Native
- Convert UI/UX designs into pixel-perfect mobile interfaces
- Integrate RESTful APIs and handle asynchronous data
- Optimize mobile applications for performance, stability, and scalability
- Implement state management using Redux, Context API, or other libraries
- Write clean, maintainable, and reusable code
- Debug, troubleshoot, and resolve production and performance issues
- Collaborate with backend developers, designers, QA, and product teams
- Participate in code reviews, sprint planning, and Agile ceremonies
- Publish and maintain apps on Google Play Store and Apple App Store
Required Skills & Qualifications
- 3+ years of experience in React Native
- Strong knowledge of JavaScript (ES6+) / TypeScript
- Hands-on experience with React Hooks and Functional Components
- Experience with Redux / Context API
- Strong understanding of mobile UI/UX guidelines
- Experience with REST APIs and third-party SDK integration
- Familiarity with Android Studio and Xcode
- Experience using Git for version control
Good to Have
- Experience with Native Modules (Android / iOS)
- Knowledge of Expo
- Experience with Firebase (Auth, Push Notifications, Analytics)
- Familiarity with CI/CD pipelines for mobile apps
- Understanding of app performance optimization techniques
Behavioral & Soft Skills
- Strong analytical and problem-solving skills
- Good communication and collaboration abilities
- Ability to work independently and meet deadlines
- Willingness to work from office in Kolkata
What We Offer
- Stable work-from-office role in Kolkata
- Opportunity to work on live production mobile applications
- Career growth and technical learning opportunities
- Supportive and collaborative work environment
Must-haves:
- You need to be excited about the problem that we are trying to solve
- 4+ years of experience building applications in React Native
- Build pixel-perfect, buttery smooth UIs across both mobile platforms.
- Strong Js fundamentals
- Built an iOS app from scratch or Native Android development experience
- Ability to give clarity and communicate well with the team, including Product, Backend and Dev-Ops (if and when needed)
- Ability to use profiling tools well, getting to root causes of bugs fast
- Ability to pick and work on adjacent technologies if and when required (Eg: If the best performance monitoring solution needs a basic firebase setup, that should not be a blocker for you to go ahead and do so)
- Maintain code and write automated tests to ensure the product is of the highest quality.
- Reach out to the open-source community to encourage and help implement mission-critical software fixes—React Native moves fast and often breaks things.
-
You need to be comfortable working in a remote environment (Good internet connection and availability on phone is required)
Good to have:
- Experience with next.js
- Experience in Test Driven Development
- Ability to tell Product what creates better User Experience, ability to tell backend what API responses will help the user get a faster load time
- Inquisitiveness to understand the system as a whole, and not only be stuck to your domain of expertise (Eg: Asking questions like why does this particular response take so much time as compared to others, and brainstorming with the backend engineer on how to improve on it)
Benefits
- Work timings - You are the master of your time. However, with great freedom comes great responsibility. If you have committed something to the team, we expect that you will give it your best to make sure that commitment is done and is done on time.
- Leave policy - Take a leave whenever for whatever reason you want. You don't need to explain yourself to us
- Health insurance for you and your family
Roles & Responsibilities:
- Work as part of a team to build React Native iOS / Android applications for Full Stack's clients.
- Architect, build and maintain excellent React Native applications with clean code.
- Implement pixel perfect UI's that match designs.
- Implement clean, modern, smooth animations and transitions that provide an excellent user
experience.
- Integrate third-party API's.
- Write unit and integration tests.
- Release applications to the Apple and Google Play stores.
- Work with native modules when required. - Interface with clients via Zoom, email, etc.
- Work with modern tools including Jira, Slack, GitHub, Google Docs, etc.
- Be part of a community of React Native developers who share knowledge and help each other as problems arise.
- Follow Full Stack's detailed development process.
Requirements:
- 2+ years of professional experience working with React Native. - 3+ years of professional software development experience.
-- Meaningful experience working on large, complex systems.
- Ability to take extreme ownership over your work. Every day is a challenge to ensure you are
performing to the expectations you and your team have agreed upon, both in regards to estimates and to the general process.
- Ability to identify with the goals of Full Stack clients and dedicate yourself to delivering on the
commitments you and your team make to them.
- An understanding of React Native best practices and a commitment to following them.
- 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.
- A positive mindset and can-do attitude.
- Forensic attention to detail.
- English skills (ability to effectively communicate via written and spoken English).
- A passion for software development. It's not just your career, it's also your hobby. You're constantly striving to learn new things and improve. You follow industry news, regularly tinker with new technologies, and read books and blogs to keep your skills current.
- You work well within a team environment and enjoy working in the office with your colleagues.
iOS developer Experienced
Job Summary :-
We are looking for an Experienced iOS developer who has good knowledge of mobile application development, maintenance and, bug fixing.
Your primary focus will be the development of iOS applications.
Responsibilities and duties:-
· Proficient with x code tool and swift programming language
· Basic Knowledge of Swift language.
· Knowledge about Storyboard, auto layout.
· Understanding of Apple’s design principles and interface guidelines.
· Familiarity with cloud message APIs and push notifications.
· Knowledge of the latest trends and technologies and the ability to use them in the apps.
· Design and build advanced applications for the iOS platform.
· Experience In Third-party libraries and APIs
· Ability to understand business requirements and translate them into technical requirements
· Collaborate with cross-functional teams to define, design, and ship new features
· Proficient understanding of code versioning tools, such as Github.
· Good Analytical and Problem solving Skills.
Key Skills:-
Java, Oops Concepts,Strong in IOS Development with swift or objective c.
Experience:- 1Year – 2Year
Required Experience and Qualifications:-
BE IT/ BE COMP/ MSC IT/ Diploma / BCA/ MCA
Salary:- 15k to 25k
We are looking for an Android Developer responsible for the development and maintenance of applications aimed at a range of devices including mobile phones and tablet computers. Your primary focus will be development of applications and their integration with back-end services. You will be working alongside other engineers and developers working on different layers of the infrastructure. Therefore, a commitment to collaborative problem solving, sophisticated design, and the creation of quality products is essential
Roles and Responsibilities
² Design and build applications.
² Ensure the performance, quality, and responsiveness of applications
² Collaborate with a team to define, design, and ship new features
² Identify and correct bottlenecks and fix bugs
² To maintain the code quality, organization, and automation
² Work with the development team consisting of architects, UI designers, product managers, testers to deliver high quality mobile product & services
² Develop, test and rollout optimised UIs for diff versions/device
² Translate designs and wireframes into high quality code
² Build for multi device & multi platform scenario i.e mobile website along with mobile app
² Design, build, and maintain high performance, reusable, and reliable Java code
² Ensure the best possible performance, quality and responsiveness of the application
² Adaptability is a key factor to becoming a great Android app developer
² Identify the bugs ,correct bottlenecks and fix bugs
Skills Required:
² Prominent hands on experience in Native Android, Native iOS or Both.
² Strong knowledge of Android SDK, different versions of Android, and how to deal with different screen sizes
² An Android app developer must be well-versed with Java programming language.
² Familiarity with RESTful APIs to connect applications to back-end services
² Strong knowledge on UI design principles, patterns, and best practices
² Having knowledge about offline storage, threading, and performance tuning
² Knowledge of the open-source Android ecosystem and the libraries available for common tasks
² A knack for benchmarking and optimization
² Ability to understand business requirements and translate them into technical requirements
² Understanding of Google’s Android design principles and interface guidelines.
² Proficient with Objective-C or Swift.
² Understanding of Apple’s design principles and interface guidelines
² Knowledge of low-level C-based libraries is preferred
² Familiarity with cloud message APIs and push notifications
² Knack for benchmarking and optimization
² Proficient understanding of code versioning tools (such as Git, Mercurial or SVN)
² Familiarity with continuous integration.
Note: Candidates from Premium Institutions are preferred
Architect, build and maintain excellent React Native applications with clean
code.
Implement pixel perfect UI's that match designs.
Implement clean, modern, smooth animations and transitions that provide an
excellent user experience.
Integrate third-party API's.
Write unit and integration tests.
Release and maintain applications to the Apple and Google Play stores.
Work with native modules when required.
Work as part of a small team, which will include other React Native
developers, a project manager, QA professional, and a designer.
Complete two-week sprints, and participate in sprint retrospectives and daily
standups.
Assist with building estimates.
Interface with clients via Slack, Zoom, and email.
Work with modern tools including Jira, Slack, GitHub, Google Docs, etc.
Requirements
· 3-5 years of professional experience working with React Native.
· Experience working with Swift, Objective C, and Java a plus but not
required.
· Meaningful experience working on large, complex systems.
· Ability to take extreme ownership over your work. Every day is a challenge
to ensure you are performing to the expectations you and your team have
agreed upon, both in regard to estimates and to the general process.
· Ability to identify with the goals of Semidot clients and dedicate yourself to
delivering on the commitments you and your team make to them.
· An understanding of React Native best practices and a commitment to
following them.
· Ability to work through new and difficult React Native issues and contribute
to libraries as needed.
· A positive mindset and can-do attitude.
· Forensic attention to detail.
· English skills is a plus(ability to effectively communicate via written and
spoken english).
· A passion for software development. It’s not just your career, it’s also your
hobby. You’re constantly striving to learn new things and improve. You follow
industry news, regularly tinker with new technologies, and read books and
blogs to keep your skills current.
· You work well within a team environment and enjoy working in the office with
your colleagues.
We are searching for a brilliant, flexible android developer to create novel apps that meet the needs of our target audience. To this end, the android developer's responsibilities include writing and proofreading code, liaising with coworkers within and outside of their department, and monitoring customers' feedback. Over time, you will also be required to create app updates. To ensure success as an android developer, you should demonstrate proficiency in one of the mainstream programming languages, and a sound understanding of the traditional product life cycle. An exceptional android developer will be fearless but respectful in the pursuit of excellence, continually striving to shape the ways in which Android apps impact the world around us.
Responsibilities:
- Writing clean and efficient codes for Android applications
- Proofreading your code and correcting mistakes before each app is released.
- Collaborating with UI and UX Designers, as well as Software Testers, to ensure that each app is presentable and in perfect working order.
- Identifying and resolving bottlenecks, rectifying bugs and enhancing application performance
- Monitoring the performance of live apps and work on optimising them at the code level
- Collaborating with cross-functional teams to define and design new features
- Implementing measures to safeguard users' data.
- Ensuring that the construction and presentation of your apps are congruent with the company's standards.
- Monitoring app reviews to detect areas for improvement.
- Creating app updates, including bug fixes and additional features, for release.
- Staying up to date with new mobile technology trends, applications, and protocols
Responsibilities
- 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
Requirements
- BS/MS degree in Computer Science, Engineering or a related subject
- Proven software development experience and Android skills development
- Proven working experience in Android app development and
- Have published at least one original Android app
- Experience with Android SDK
- Experience working with remote data via REST and JSON
- 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.








