Web & Mobile App Developer

Date: Jun 19, 2025

Company: Zelestra

Location

Gurugram, India

About Us

Zelestra (formerly Solarpack) is a multinational company fully focused on multi-technology renewables with a vertically integrated business model focused large-scale renewable projects in rapidly growing markets across Europe, North America, Latin America, Asia, and Africa. Headquartered in Spain, Zelestra has more than 1000 employees worldwide and is backed by EQT, one of three largest funds in the world with $200B in assets.

One solution doesn’t fit all, especially in energy. We’re on a journey alongside our clients, assisting them in achieving their decarbonization goals. We are committed to developing tailored-made solutions by analyzing power market challenges and co-creating structured products based on customer insights.

One of the top 10 sellers of clean energy to corporates in the world, according to Bloomberg NEF, we are committed to tailored solutions to meet customer needs.

At Zelestra we aim to be a solid and solvent company, capable of executing quality and valuable projects for the society and the environment. Therefore, we maintain a firm commitment to contribute directly to the social development of the communities and markets in which we operate, not only through the creation of economic value, but also through the generation of quality employment and through the social projects we promote.

To support our mission, we are looking for a highly skilled Web and Mobile app developer with a strong background in renewable energy, particularly solar PV and wind operations.

Mission

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 responsive, cross-platform applications using modern frameworks such as React, Angular, Flutter, React Native, Swift, and Kotlin.
• Implement adaptive UI/UX designs to ensure high-quality user experiences across devices.
• Ensure compatibility and performance on both iOS and Android platforms.
  
  

Backend Integration & API Development

• Collaborate with backend teams to integrate RESTful APIs, GraphQL, and cloud services (AWS, Firebase, Azure).
• Implement secure authentication mechanisms (OAuth, JWT) and follow best practices for data security and protection.
  
  

Performance Optimization & Debugging

• Optimize applications for speed, scalability, and responsiveness.
• Identify, debug, and resolve UI, connectivity, and performance issues across various devices and platforms.
  
  

Collaboration & Deployment

• Work closely with designers, QA testers, and product teams to deliver innovative and functional digital solutions.
• Deploy applications to Google Play Store, Apple App Store, and web hosting platforms.
  
  

Continuous Learning & Best Practices

• Stay updated with emerging technologies, frameworks, and development trends.
• Follow best coding practices, maintain clean documentation, and work within Agile/Scrum development methodologies.
  
  

Job Requirements

• Bachelor's / Master's degree in Computer Science, Software Engineering, or related field.
• A minimum of 5 years of experience in web and mobile app development.
• Proficiency in full-stack development, including frontend frameworks (React.js, Angular, Vue.js), mobile platforms (React Native, Flutter, Swift, Kotlin), and backend technologies (Node.js, Python with Django/Flask, Firebase, .NET, PHP). Strong experience with databases (PostgreSQL, MySQL, MongoDB, Firebase Firestore), API design and integration (RESTful APIs, GraphQL, WebSockets), DevOps practices (Docker, AWS, Azure, CI/CD pipelines), and version control systems (Git, GitHub, GitLab).
• Strong problem-solving and critical-thinking abilities, with excellent analytical skills. Proven ability to communicate and collaborate effectively across technical and business teams. Comfortable working in fast-paced, agile development environments.
  
  

What We Offer

• Career opportunities and professional development in a growing multinational company with a team highly qualified.
• Flexible compensation.
• Full working day.
• Remote work 2 days a week.
  
  

Zelestra celebrates the diversity of thought and experience that comes from a variety of backgrounds including, among others, gender, age, ethnicity... Our mission is to contribute to a fairer and more equitable society.

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Let's co-build a carbon-free tomorrow!

Visit us at zelestra.energy