MERN - Full Stack Developer

About SolarSquare Energy:

At SolarSquare we are building the Home-Energy brand of future India. We help homes switch to rooftop solar and move away from traditional coal electricity. We are a full-stack D2C residential solar brand - designing, installing, maintaining (after-sales) and financing solar systems for home-owners across India.

In 3 years, we have scaled to become the leading residential solar brand in India. We are obsessed with quality, customer service and innovating to make it simple for homes to switch to solar. We are looking for leaders to join us in this mission.

Know us a bit better through these links:

• Techcrunch SolarSquare article
• Elevation - Podcast with SolarSquare Founders
• Startup by IIT Grads Helps Indian Homes Run on Zero Electricity, Earns Rs 200 Crore in Revenues
• The Climate Conversations ft Solar Square
• Elevation Capital - SolarSquare

Job Title: MERN Full Stack Developer

Location: Mumbai

Work Arrangement: Flexible (Hybrid, Mon–Fri)

Company: SolarSquare

Role Overview:

We are looking for an experienced and motivated MERN Full Stack Developer to join our growing technology team at SolarSquare. As a full stack developer, you will be responsible for designing, building, and maintaining modern web applications using the MongoDB, Express.js, React.js, and Node.js (MERN) stack. This role demands strong technical expertise, a problem-solving mindset, and the ability to thrive in a fast-paced, mission-driven environment focused on clean energy innovation.

Key Responsibilities:

• Design, develop, and maintain scalable web applications using the MERN stack
• Write clean, efficient, and reusable JavaScript/TypeScript code
• Develop user-facing features with React.js and implement backend services with Node.js and Express.js
• Create and manage databases using MongoDB
• Build and integrate RESTful APIs and third-party services
• Ensure optimal performance, responsiveness, and security of applications
• Collaborate with designers, product managers, and other developers to ship features
• Participate in code reviews, sprint planning, and architecture discussions
• Implement core services such as caching, logging, and monitoring
• Work in an agile environment and contribute to continuous improvement.

Key Requirements:

• 3+ years of hands-on experience in full stack development using the MERN stack
• Strong proficiency in JavaScript and TypeScript
• Experience with modern JavaScript frameworks/libraries such as React.js (Angular/Vue.js is a bonus)
• Good understanding of RESTful APIs and asynchronous programming
• Experience with cloud platforms (AWS, Azure, or GCP)
• Proficient in Git and version control workflows
• Understanding of microservices architecture and event-driven systems
• Experience with Docker, Kubernetes, and container-based deployments
• Familiarity with Test Driven Development (TDD) and testing frameworks
• Knowledge of runtime services like caching, logging, and background jobs
• Strong debugging, problem-solving, and communication skills
• Experience working in agile development teams.

What We Offer:

• A high-impact role in shaping India’s clean energy future
• Flexible hybrid work setup to promote work-life balance
• Collaborative, open, and innovation-driven team environment
• Opportunities to work on cutting-edge tech stacks and real-world challenges
• Competitive compensation with performance-based growth opportunities
• Access to learning and upskilling resources
• A chance to be part of a purpose-led company contributing to sustainability