Web & Mobile App Developer

Job Description

Location

Gurgaon (India)

Mission

Zelestra is a multi-national renewable energy company committed to revolutionizing the way we harness and utilize clean energy. We aim to drive innovation in sustainable technologies and shape the future of the energy landscape. To support our mission, we are looking for a highly skilled Business Analyst with a strong background in renewable energy, particularly solar PV and wind operations.

We are seeking a highly skilled Web and Mobile App Developer with expertise in designing, developing, and maintaining responsive web and mobile applications. The ideal candidate should have experience with front-end and back-end technologies, cross-platform frameworks, and cloud-based services. You will work closely with UI/UX designers, product managers, and backend AI/ML engineers to build seamless, high-performance applications.

This is an individual contributor role where candidate will need to collaborate with Product, Tech and Business team members.

Responsibilities

• Web & Mobile App Development
• Design, develop, and maintain scalable web and mobile applications using modern frameworks (React, Angular, Flutter, React Native, Swift, Kotlin, etc.).
• Implement responsive and adaptive UI designs for seamless user experiences.
• Ensure cross-platform compatibility for both iOS and Android.
• Backend Integration & API Development
• Work with backend teams to integrate RESTful APIs, GraphQL, and cloud services (AWS, Firebase, Azure, etc.).
• Ensure secure authentication (OAuth, JWT, etc.) and data protection best practices.
• Performance Optimization & Debugging
• Optimize app performance for speed, scalability, and responsiveness.
• Debug and troubleshoot UI, connectivity, and performance issues across devices and platforms.
• Collaboration & Deployment
• Collaborate with designers, QA testers, and product teams to create innovative solutions.
• Deploy applications on Google Play Store, Apple App Store, and web hosting services.
• Continuous Learning & Best Practices
• Stay up to date with emerging technologies, frameworks, and industry trends.
• Implement best coding practices, maintain documentation, and follow Agile methodologies.
  

• Bachelor’s/Master’s degree in Computer Science, Software Engineering, or related field.
• 5-8 years of experience in web and mobile app development.
  
  

• Frontend: React.js, Angular, Vue.js (for web apps)
• Mobile: React Native, Flutter, Swift (iOS), Kotlin (Android)
• Backend: Node.js, Python (Django/Flask), Firebase, .NET, PHP
• Databases: PostgreSQL, MySQL, MongoDB, Firebase Firestore
• APIs: RESTful APIs, GraphQL, WebSockets
• DevOps & Deployment: Docker, AWS, Azure, CI/CD pipelines
• Version Control: Git, GitHub, GitLab
  
  

• Strong problem-solving and analytical thinking.
• Excellent collaboration and communication skills.
• Ability to work in fast-paced, agile development environments.
• Strong problem-solving and critical-thinking abilities.
• Ability to work collaboratively with technical and business teams.