Full - Stack Engineer

We are hiring a Full-stack Engineer (2-3 years of experience) to help build energy software products to power the future of clean energy. India's power-hungry mid-market is stuck in the dark ages. At Neufin, we aren't just "selling solar. " We are building India's first tech-led energy retailer. We use our proprietary energy software, Lumen, to orchestrate supply from solar, wind, and batteries (BESS) to deliver a single promise: 24x7x365 best-priced clean energy. You will play a critical role in bridging the gap between complex IoT hardware data and actionable AI insights for India's mid-market businesses. You will have the autonomy to build end-to-end features for our flagship products, Lumen and our AI Contracts Engine.

We're looking for engineers who have genuinely restructured how they work around AI who use tools like Cursor, Claude Code, or similar not as autocompletes but as collaborators they manage and review. Engineers who can do this well become dramatically more effective than those who can't. That gap is only going to widen.

Responsibilities:

• You will be responsible for building the data pipelines and user-facing features for Lumen. You will work to ensure that high-frequency IoT data is processed efficiently and can be visualized intuitively.
• You will work across different technologies: solar inverters, BESS, optimizers, smart energy meters, IoT sensors, and more.
• Develop end-to-end features, from React-based dashboards to backend Python/Node services that process energy consumption data.
• Work on data pipelines that ingest real-time telemetry from IoT devices, ensuring low-latency updates for our digital twin models.
• Design and implement data visualizations (load curves, consumption insights, and cost charts) that make energy data easy to understand.
• Write clean, documented, and testable code while participating in code reviews and maintaining CI/CD standards.
• Architect LLM-ready databases and code by prioritizing strong typing, modular design, and comprehensive technical documentation so our internal AI agents and tools like Cursor or Claude Code have the context to assist in building and maintaining our stack at high velocity.
• Partner with the product team to design, build, and iterate on MVPs for experimental features. Move quickly from proof-of-concept to production-ready.

Requirements:

• Familiarity with time-series data (e. g., InfluxDB, TimescaleDB, and Kafka) and understanding of IoT protocols (MQTT or HTTP) is a significant plus.
• Hands-on experience with GCP (Cloud Run, Kubernetes, Cloud SQL, BigQuery) and Docker.
• You actively use AI coding tools, and more importantly, you've changed how you architect and review code because of them.
• Experience designing schemas for high-volume data.
• Hard Skills: 2-3 years of professional software development experience, ideally within a high-growth startup or an IoT/energy tech environment.

Full-Stack Proficiency:

• Backend: Proficiency in Python (FastAPI/Django) or Node.js . Experience building and consuming RESTful APIs.
• Frontend: Expertise in React.js (preferred), Next.js, and TypeScript.

Soft Skills:

• You want to understand how a power grid works and how data can solve the climate crisis.
• You thrive in a 0-to-1 environment and prefer shipping over over-engineering.
• You enjoy working across functions talking to product managers about UX and to field engineers about hardware maintenance.

Bonus Points If You:

• Have prior experience in BESS systems, EV BMS systems, or renewable energy tech startups.
• Have built real-time monitoring dashboards for hardware assets.