PHP Developer - Mobile web services

Job Description:

We are looking for a skilled React Native Developer to design, develop, and maintain high-performance cross-platform mobile applications for Android and iOS.

The ideal candidate must have strong command over React Native, TypeScript/JavaScript, and working knowledge of Kotlin (Android) or Swift (iOS) to build and integrate native modules when needed.

You will work closely with backend, design, and product teams to deliver seamless, fast, and stable mobile experiences for the ZestFindz ecosystem.

Key Responsibilities:

• Develop and maintain cross-platform mobile applications using React Native.
• Collaborate with design and product teams to deliver pixel-perfect, responsive UIs.
• Integrate REST APIs / GraphQL and handle authentication, caching, and error states efficiently.
• Implement and manage app state using Redux / Context API / Zustand.
• Optimize app performance, handle animations, memory leaks, and rendering issues.
• Manage offline storage using SQLite / AsyncStorage / MMKV.
• Configure and manage Firebase services - Auth, Firestore, Push Notifications, Analytics.
• Handle deep linking, in-app navigation, and app lifecycle events.
• Deploy apps to Google Play Store and Apple App Store (with signing, provisioning, versioning).
• Work with DevOps to integrate apps into CI/CD pipelines (Fastlane / GitHub Actions / Codemagic).
• Write clean, modular, reusable code with proper documentation and testing.
• Debug, profile, and optimize performance for low-end devices and weak networks.
• Ensure security best practices - secure token storage, environment management, and data encryption.

Must-Have Skills:

• Strong experience in React Native (0.70+) and TypeScript.
• Solid understanding of mobile architecture patterns (MVC, MVVM, Flux).
• Experience with React Navigation, Redux / Context API / Zustand, and API integration (Axios / Fetch).
• Familiarity with Firebase, App Permissions, and Push Notifications (FCM/APNS).
• Good understanding of Android Studio, Xcode, Gradle, and Cocoapods.
• Ability to write clean, testable code with unit and integration tests.
• Working experience with Git / GitHub / GitLab CI/CD.
• Problem-solving mindset and ability to debug across full mobile stack.

Good-to-Have Skills (Bonus):

• Knowledge of native SDK integrations (Maps, Camera, Payments, etc.).
• Experience with React Query / GraphQL.
• Familiarity with Fastlane, Crashlytics, App Center, or Sentry.
• Understanding of UX principles and animation libraries (Lottie, Reanimated).
• Experience with OTA updates (CodePush) and App Store Optimization (ASO).

About the Job

As a specialist in electronics and software for the past 20 years, in-tech is a dynamic, fast-growing engineering company headquartered in Munich, Germany employing around 2350 employees globally across 20 project locations in 8 countries.in-tech develops innovative engineering solutions for the automotive, rail, aerospace, defence, and industrial sectors.

We are committed to a flexible, modern work culture and work-life balance. Our colour orange stands for liveliness, warmth, and dynamism. We value a strong team spirit, fresh ideas and a positive work culture. We call it the “Orange Spirit”!

Since 2024, in-tech became a subsidiary of Infosys Ltd. This strategic partnership enables us to offer our customers even more comprehensive development and digitalisation services and a greater offshore capability.

We are looking for a Senior Xamarin Developer who is passionate about building high-quality, scalable, and performance-driven mobile applications. This role is ideal for a versatile professional with strong expertise in cross-platform mobile development, backend API development, and database-driven applications. The ideal candidate will work across Xamarin mobile applications, ASP.NET Core backend services, and SQL Server databases, ensuring seamless integration, optimal performance, and a superior user experience. If you enjoy working in a collaborative, fast-growing environment with a strong culture of innovation and teamwork, we’d love to hear from you!

Responsibilities

• Design, develop, and maintain cross-platform mobile applications using Xamarin forms and Xamarin Native for iOS and Android platforms.
• Build, integrate, and maintain RESTful APIs and backend services using ASP.NET Core.
• Develop secure, scalable, and high-performance backend components to support mobile and enterprise applications.
• Work with SQL Server or other relational databases for data modeling, complex queries, and performance optimization.
• Implement efficient data access layers and ensure data integrity across mobile and backend systems.
• Perform unit testing, integration testing, debugging, and troubleshooting for both mobile applications and backend services.
• Optimize application performance, responsiveness, and scalability across multiple devices and platforms.
• Collaborate with UI/UX designers, product owners, QA teams, and cross-functional stakeholders to gather requirements and deliver robust solutions.
• Participate in code reviews, enforce coding standards, and mentor junior developers as needed.
• Prepare technical documentation and provide deployment, release, and post-production support.

Requirements

• 8–10 years of hands-on experience in mobile application and backend development.
• Strong expertise in Xamarin.Forms and Xamarin.
• Native for cross-platform mobile development.
• Proficiency in C#,.NET, and ASP.NET Core for backend and API development.
• Extensive experience designing and consuming RESTful APIs.
• Solid experience working with SQL Server or other relational databases, including query optimization and performance tuning.
• Strong understanding of mobile application architecture, design patterns, and best practices.
• Experience with unit testing frameworks, debugging tools, and automated testing practices.
• Knowledge of application performance optimization and scalability principles.
• Familiarity with source control systems (e.g., Git) and CI/CD pipelines.
• Experience working in Agile or iterative development environments.
• Strong analytical, problem-solving, and communication skills.
• Ability to work independently while collaborating effectively within a team.

Apply with us

If you have experience and team spirit and are looking for a great place to work, then start your job with us.

As part of our dedication to the diversity of our workforce, in-tech is committed to equal employment opportunity without regard for age, race, colour, national origin, ethnicity, gender, protected veteran status, disability, sexual orientation, gender identity, or religion.

Technical Experience:

-Translate designs and wireframes into high-quality code

-Design, build and maintain high performance, reusable, and reliable Java 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

-Strong knowledge of Android SDK, different versions of Android, and how to deal with different screen sizes

-Familiarity with RESTful APIs to connect Android applications to back-end services

-Strong knowledge of Android UI design principles, patterns, and best practices

-Experience with offline storage, threading, and performance tuning

-Ability to design applications around natural user interfaces, such as touch

-Familiarity with the use of additional sensors, such as gyroscopes and accelerometers

-Knowledge of the open-source Android ecosystem and the libraries available for common tasks

-Ability to understand business requirements and translate them into technical requirements

-Familiarity with cloud message APIs and push notifications

-A knack for benchmarking and optimization

-Understanding of Googles Android design principles and interface guidelines

-Proficient understanding of code versioning tools, such as Git

Responsibilities:

• Collaborate with cross-functional teams to define, design, and ship new features.
• Develop and maintain high-quality Android applications using Kotlin programming language.
• Design, build and maintain high-performance, reusable, and reliable code.
• Ensure the best possible performance, quality, and responsiveness of the application.
• Identify and correct bottlenecks and fix bugs.
• Continuously discover, evaluate, and implement new technologies to maximize development efficiency.
• Work with external data sources and APIs.
• Unit-test code for robustness, including edge cases, usability, and general reliability.

Requirements:

• Bachelor's degree in Computer Science, Software Engineering or related field.
• 2+ years of experience in Android development using Kotlin.
• Strong knowledge of Android SDK, Android UI design principles, and Material Design.
• Experience with RESTful APIs, JSON, and XML.
• Familiarity with cloud message APIs and push notifications.
• Understanding of code versioning tools such as Git.
• Familiarity with continuous integration.
• Good understanding of object-oriented programming, software design patterns and algorithms.
• Strong analytical and problem-solving skills.
• Excellent written and verbal communication skills.
• Ability to work independently and as part of a team.

We are looking for a Sr. React Native Developer to help design and develop a new mobile application.

Roles and Responsibilities
1. Developing high-quality JavaScript code for the application.
2. Working closely with design and technology teams to gather requirements and formulate solutions.
3. Coordinating with back-end team to establish JSON-based APIs.
4. Deploying and managing application on Google Play Store & App Store.
5. Optimizing application for maximum speed, performance, and compatibility.
6. Making recommendations to address UI/UX issues.
7. Providing assistance to QA to ensure the app is properly tested and QAd.

Desired Candidate Profile
1. Bachelor's Degree or higher in Computer Science or related field.
2. Strong experience working with React Native on production apps, with knowledge of existing standards and best practices.
3. Strong experience in JavaScript, and Redux.
4. Experience with version control tools (GIT).
5. Experience with responsive design/implementation.
6. Familiarity with REST APIs.
7. Experience with common front-end development tools such as Babel, Web pack, NPM, etc.

Bonus

Knowledge in any or all of any or all of Swift, Objective-C, Java, and Kotlin is a big plus.