Senior Full-Stack Developer (Python, React, MongoDB)

About This Opportunity

This is an exciting opportunity for an experienced Senior Full-Stack Developer to join a clean-tech organization focused on helping companies reduce carbon emissions and operational costs across the lifecycle of their buildings. You will play a pivotal role in building and scaling a cutting-edge decarbonization platform from the ground up-shaping architecture, functionality, and user experience.

In this role, you will work closely with designers, product managers, and climate domain experts to create powerful, data-driven tools that enable smarter decisions in building management and sustainability. The environment is fast-paced and collaborative, ideal for a hands-on developer who thrives in early-stage, high-growth settings.

Key Responsibilities

• Build and own end-to-end features across the stack, from backend services to frontend UI.
• Collaborate with product, design, and domain experts to translate requirements into scalable technical solutions.
• Implement and integrate AI/ML-powered carbon reduction tools into the platform.
• Develop backend services with Node.js (Express) and Python (FastAPI).
• Build responsive, user-friendly interfaces using React (Vite).
• Design, implement, and maintain MongoDB data models and APIs.
• Leverage Google Cloud Platform (GCP) for hosting, storage, and deployment.
• Mentor junior developers and promote best practices in coding, testing, and deployment.
• Adapt quickly to changing requirements and user feedback.
• Participate in code reviews, architecture discussions, and sprint planning.

Qualifications

• Bachelor's degree in Computer Science, Software Engineering, Mathematics, or related field.
• 5+ years of professional experience delivering full-stack features in a SaaS environment.
• Extensive experience with TypeScript, Node.js, React, and MongoDB.
• Strong backend experience with Python and FastAPI.
• Experience deploying and scaling applications on Google Cloud Platform.
• Proven ability to work in fast-paced, startup-like environments.
• Strong problem-solving skills, attention to detail, and a growth mindset.
• Excellent communication skills and the ability to collaborate across teams.
• Passion for sustainability and building impactful products.

Good to Have

• Experience in clean-tech, energy efficiency, or building management software.
• Familiarity with AI/ML-based applications.
• Experience with CI/CD pipelines and cloud-based DevOps practices.