React Native Developer

Job Description: SDE – Mobile / Full-Stack Developer with IoT & AI Knowledge

Role: Software Development Engineer – Mobile / Full-Stack

Experience: Minimum 2 years

Work Mode: Work from Office

Employment Type: Full-time

About the Role

We are looking for an SDE with strong React Native mobile development experience, full-stack development knowledge, and a clear background in IoT-based systems.

The candidate should have hands-on experience working with mobile applications that interact with IoT devices, sensors, hardware systems, real-time device data, or cloud-based IoT platforms.

Knowledge of AI-based systems, AI integrations, automation workflows, LLMs, or AI-powered product features will be considered a strong advantage.

The ideal candidate should also have basic team-leading capability, ownership mindset, and the ability to manage technical execution with a small development team.

Key Responsibilities

• Develop and maintain mobile applications using React Native.
• Build scalable, reusable, and production-ready mobile app components.
• Integrate mobile applications with backend APIs, databases, and cloud services.
• Work on IoT-based integrations, including:
• Device-to-app communication
• Sensor data handling
• Real-time device monitoring
• MQTT / WebSocket-based communication
• Hardware-software interaction
• IoT dashboard or control system integration
• Collaborate with hardware, backend, frontend, AI, and product teams.
• Work on AI-enabled features where required, such as:
• AI-based automation
• Data analysis
• AI alerts or recommendations
• LLM/API integrations
• Smart monitoring or decision-support systems
• Lead small development tasks and guide junior developers.
• Review code, debug issues, and improve application performance.
• Participate in architecture planning and technical decision-making.
• Ensure proper documentation of mobile flows, APIs, IoT integrations, and system logic.

Required Skills

• Minimum 2 years of experience in React Native mobile development.
• Strong knowledge of JavaScript / TypeScript.
• Experience in mobile app development for Android and/or iOS.
• Hands-on exposure to IoT systems or IoT-enabled applications.
• Experience working with IoT device data, sensors, MQTT, BLE, Wi-Fi modules, embedded systems, or real-time hardware communication.
• Experience with REST APIs, WebSockets, and real-time data handling.
• Basic full-stack development knowledge using Node.js, Python, FastAPI, Express.js, or similar backend technologies.
• Database knowledge such as MongoDB, PostgreSQL, Firebase, or similar.
• Understanding of Git, debugging, deployment, and development workflows.
• Ability to lead tasks, coordinate with team members, and take ownership of delivery.

AI Knowledge — Strong Priority

Candidates with knowledge or experience in the following will be preferred:

• AI-powered applications
• LLM API integrations
• OpenAI / Gemini / Claude APIs
• AI automation workflows
• AI-based monitoring or analytics
• Computer vision or sensor-data intelligence
• Predictive alerts or recommendation systems
• AI agents or intelligent assistants
• Prompting and AI workflow design

Good to Have

• Experience with AWS IoT, Azure IoT, Google Cloud IoT, Firebase, or similar platforms.
• Experience with MQTT brokers, BLE, embedded hardware, Raspberry Pi, Arduino, ESP32, or similar devices.
• Native Android/iOS development knowledge.
• Experience building dashboards for IoT monitoring or device control.
• Prior experience in AI + IoT projects.
• Previous experience leading a small development team.

Candidate Expectations

• Must be comfortable working from office.
• Should have strong ownership and problem-solving ability.
• Should be able to work across mobile, backend, IoT, and AI-related modules.
• Should communicate clearly with both technical and non-technical teams.
• Should be disciplined with timelines, documentation, and reporting.
• Should be capable of guiding junior developers and coordinating execution.

Job Title: Senior React Native Developer

Location: Bangalore / Noida

Employment Type: Full-Time Job

Description: As a Senior React Native Developer, you will be responsible for architecting, building, and maintaining high-quality mobile applications. You will collaborate with cross functional teams to deliver solutions that align with the overall product architecture, ensuring smooth integration across different layers of the infrastructure. You will play a key role in the end to-end development process, from concept to deployment, while maintaining the highest standards of code quality.

Key Responsibilities: -

• Take ownership of the entire development lifecycle including analysis, functional decomposition, modelling, prototyping, code review, testing, deployment, and reporting for project deliverables.
• Maintain and optimize code while writing automated tests to ensure product quality and performance.
• Ensure timely and high-quality delivery of product releases.
• Provide accurate technical effort estimates to assist in project planning and resource allocation.
• Participate in the technical recruitment process as part of the interview panel.
• Collaborate with clients, senior business leaders, and technology teams to ensure effective communication and project alignment.

Required Skills & Experience:

• 5 - 8 years of experience in mobile application development.
• 4+ years of hands-on experience developing with React Native.
• Strong proficiency in JavaScript (ES6), React Native, CSS, and JSON.
• Familiarity with Java and experience with both Android and iOS platforms.
• Solid understanding of the mobile ecosystem, including performance optimization and monitoring.
• Deep knowledge of Native Components, Core Components, and React Native libraries.
• Experience building scalable mobile apps, with an understanding of mobile architecture and best practices.
• Expertise in debugging, root cause analysis (RCA), and problem-solving.
• Ability to multitask effectively, manage deadlines, and work under pressure.
• Strong analytical thinking, and confidence in engaging with clients and senior stakeholders.

Preferred Qualifications:

• Experience working in agile development environments.
• Familiarity with CI/CD pipelines and version control systems (e.g., Git).
• Knowledge of mobile performance optimization techniques. Mandatory Skills:
• React Native, JavaScript (ES6), CSS, Android/iOS Development.

We are seeking a talented and experienced Engineering Lead to join our Team. As the Engineering Lead, you will play a crucial role in driving the technical direction of our mobile app development, focusing on iOS and ReactJS technologies. You will lead a small team of software engineers and work closely with the product and design teams to deliver innovative and high-quality mobile applications. The ideal candidate is a hands-on technologist with a passion for startups, possesses strong leadership skills, and thrives in a fast-paced, dynamic environment.

Responsibilities:

• Lead and manage a team of software engineers, providing mentorship, guidance, and support throughout the software development lifecycle
• Set clear objectives and performance expectations for the team members, and regularly assess and review their performance
• Collaborate with product managers, designers, and other stakeholders to understand project requirements and define the technical roadmap for mobile app development projects.
• Provide technical expertise and guidance to the team, assisting with architectural decisions, code reviews, and problem-solving.
• Ensure the timely delivery of high-quality mobile applications by managing resources, setting realistic project timelines, and resolving any obstacles or bottlenecks.
• Stay up-to-date with the latest industry trends and advancements in mobile app development, iOS, and ReactJS technologies, and identify opportunities to leverage new tools and frameworks.
• Foster a culture of continuous improvement within the team, encouraging knowledge sharing, adopting best practices, and promoting a positive and collaborative work environment.
• Collaborate with cross-functional teams, such as QA, DevOps, and UX/UI, to ensure seamless integration and deployment of mobile applications.
• Act as a point of contact for technical discussions, representing the team in meetings with stakeholders and upper management.
• Identify and address any technical or performance-related issues, working closely with the team to resolve them and ensure the stability and scalability of the mobile applications.

We are looking for a React Native developer interested in building high-performance mobile apps on both the iOS and Android platforms. You will be responsible for architecting and building these applications, as well as coordinating with the teams responsible for other layers of the product infrastructure. Building a product is a highly collaborative effort, and as such, a strong team player with a commitment to perfection is required.

Responsibilities
• 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 for performance that feels native.
• Reach out to the open source community to encourage and help implement mission-critical software fixes—React Native moves fast and often breaks things.
• Maintain code and write automated tests to ensure the product is of the highest quality.

• Firm grasp of the JavaScript and TypeScript language and its nuances, including ES6+ syntax
• Knowledge of functional and 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 Android Studio, IntelliJ   
• We are only considering Pune-based candidates who can start immediately / within 30 days

• 7+ years of full-time iOS engineering experience with strong expertise in React Native and deep understanding of iOS SDK.
• Proficient in object oriented programming, multithreading, networking, memory management and source control management (git).
• Strong focus on building high-quality mobile UI experiences. Passion about delivering software that delights our end users.
• Proficiency with UI/UX paradigms to build elegant user experiences.
• Experience working with product management and design teams.
• Strong written, verbal communication skills; ability to influence others within your team and outside your team.
• Experience in testing and deploying scalable mobile applications.
• Experience analyzing a feature in production using analytics and experiments.
• Attention to detail, particularly around software engineering fundamentals, testing methodologies and quality.

• Fast learner: We're looking for software engineers who thrive on learning new technologies and don't believe in one-size-fits-all solutions. Should be able to adapt easily to meet the needs of our extensive growth and constantly evolving business environment.
• A great teammate: Believe that you can achieve more on a team - that the whole is greater than the sum of its parts. You rely on others' candid feedback for continuous improvement.
• Design and entrepreneurial acumen: Understand requirements and business use cases beyond the written word.

Roles and Responsibilities

Hiring for Mobile app Developer (1 to 2 yrs.)

- Develop hybrid mobile app for iOS and Android platform using Flutter framework

- Hands of experience in Flutter

- Proven software development experience

- Flutter/ React Native Developer

- Must have Experienced 6 months to 2 yrs. in above

- Developed at least 2 apps and live

Desired Candidate Profile

Fresher, Experience mobile app developer

- Experience in developing Android/ iOS applications

- Testing and debugging skills

- Design, Develop and maintain applications

Dear all,

CONTUS is looking for an ever-growing team with young brains in majority and a couple of senior experts to guide them. A fun-filled group that learns by doing things and love what they do. Opportunities are wide as we not only take up client projects but churn out own apps as well.

Why should you choose Contus?

• A great platform to learn and work in complex full stack development projects Angular, React, Node, Laravel which can take to the next level.
• Attractive perks as per Industry standards & Essential benefits
• Five days of work in a week with flexible work timings.
• A great opportunity to handle Enterprise Accounts across the globe and to manage projects in Internet of Things(IoT), Block-Chain, Full Stack development, Enterprise Mobility, DevOps, Agile and a lot more to keep yourself updated on current trends
• Enterprise accounts includes leading Automobile, Network Security, Truck, Construction, Embedded Electronics oriented clients all over the world which seeks our help in Digital Transformation

CONTUS 11                   - https://www.youtube.com/watch?v=sOC62PTw2MU">https://www.youtube.com/watch?v=sOC62PTw2MU   

CONTUS Awards 2018  - https://www.youtube.com/watch?v=EX8NEQFQ60s&;t=50s">https://www.youtube.com/watch?v=EX8NEQFQ60s&;t=50s   

Designation : Application Developer / Sr.Application Developer / Tech Lead - Android

Mode of Employment : Permanent

Salary : Industry Standards + Benefits (Medi-Claim Insurance & Accidental Policy)

Work Location : Guindy, Chennai

Working days :Monday to Friday 9.30 AM to 6.30 PM (Flexible 8 Hours)

Venue Details:

Kamak Towers, 12A,(SP), 6th floor,

Thiruvika Industrial Estate, Ekkatuthangal, Guindy, Chennai - 32.

Land Mark: Behind Olympia tech Park.(3rd right)

Note:

*** Candidates attended in 3 Months of duration are not eligible to apply again *** 

Job Summary :--

An ever-growing team with young brains in majority and a couple of senior experts to guide them. A fun-filled group that learns by doing things and love what they do. Opportunities are wide as we not only take up client projects but churn out own apps as well.

Responsibilities:-

*Develop and create applications for client projects and in-house requirements.

*Make use of Android frameworks to create UI faster, take control/understand client projects from start to end.

*Deliver the projects successfully in-time with quality.

*Stay updated on the latest industry trends, development practices and evolving mobile technologies.

What we look for :-

Good analytical and programming skills in Java, Android 2.2 + SDK/NDK Development (Web Services & API's, LBS, UI and XML, Layout Design, Social Network Integration, Content Providers etc.), XML, JSON, SQLite3 and MySQL.

Handful experience in tools like Android Studio, Eclipse and analytical tools like Find Bugs and PMD.

Basic knowledge about Hybrid Application and ideas on publishing applications in Android Market.

Knowledge of PHP-driven CMSes & versioning tools like SVN will be added an advantage.

Should be able to do Client Interaction

Expertise in design and development of applications to Android devices / platform.\

Maintain quality and ensure responsiveness of applications.

Hands on experience with Android Studio, APIs and Database usage.

Expertise in automated test tools for Android application.

Exposure to UI design principles and best practices.

Knowledge of open-source Android ecosystem and the available libraries.

Experience in NDK/C++/Java/Android framework.

Hands on experience with SCM tools and services such as Git, Gitlab, gerrit, SVN, others

Familiarity with open source tool chains.

Other GUI design tools and framework experience desirable. 

The following are the criteria, that we expect experienced candidates to meet.

1. Strong in OOPS concepts and must know how to incorporate them in projects.
2. Must have through understanding of all these android components. (Activities, Fragments, Service, Intent Service, Broadcasts, AsyncTasks, SQLite, Push Notifications)
3. Must have strong understanding of data structures of the Java's Collections API. (List, Map, Set, Queue)
4. Must be comfortable in writing multi-threaded and thread safe applications.
5. Must be familiar with design patterns (MVP, MVVM).
6. Should be comfortable using Android Profiler for tracking memory, network and cpu usage.
7. Should be familiar with writing applications for portrait and landscape orientations.
8. Added advantage if the candidate can code in kotlin.
9. Added advantage if the candidate has knowledge on XMPP, Socket, Webrtc, VOIP, BLE, Bluetooth Classic.

Kindly prepare on below topics well;

OOM

JVM

Multithreading, Overriding, Overloading

Abstraction, async task,

Main thread, Services

About CONTUS :-

CONTUS started providing digital transformations solutions and services since 2008, even before the actual digital transformation era started. Today after a proud 11 years of successful existence, Contus is consciously driven by the future of Digital techs, not by the current or legacy techs. 

The solutions and services of Contus have connected millions of devices and people and hearts across the globe right from heartbeats monitors to Televisions to Cars & trucks to smart cities, with it's Over The Top (OTT) Video on Demand and messaging solutions and also with its full stack IOT enablement services.  

With hundreds of digital engineers @Contus, we have enabled millions of end users to connect for elaborate used cases in more the 50 countries.

To know more about us, visit http://www.contus.com/">www.contus.com, a leading mobile application development and web development company