Full Stack Engineer

SmartHelio is a Y Combinator company (YC W22). We are a customer-focused and research-driven deep-tech startup headquartered in Lausanne, Switzerland. We are disrupting conventional energy operations and asset management by bringing AI-driven asset management workflow automation. We enable solar/clean energy companies with automated system performance analysis and decision-intelligence capabilities for smoother asset management and higher profitability. Learn more at www.smarthelio.com We are hiring a hands-on Full-Stack Developer to build end-to-end product features—intuitive frontends, reliable APIs, and data-intensive backends. You’ll ship production code, collaborate closely with product/design/data teams, and help us scale our platform used by global clean-energy operators.QualificationStrong with JavaScript/TypeScript and modern React (hooks), plus Node.js (Express).Experience with one or more: React.Js, Next.js, Redux/Zustand, TanStack Query.Data-viz (e.g., D3, Plotly, ECharts), time-series stores (Timescale/Influx/Timestream), and messaging/streaming (Kafka/SQS).Backend fundamentals: API design, auth (JWT/OAuth), caching, rate-limiting, pagination, error handling, etc.Databases: solid SQL (PostgreSQL/MySQL) and NoSQL (MongoDB and Redis); excellent command over schema design strategies, and query optimization.Excellent knowledge of Docker, CI/CD (GitHub Actions/Jenkins) and cloud (AWS/Azure).Testing in practice: Must have written unit/integration/e2e tests. Jest/Playwright/Cypress (or similar), and comfort with API & e2e test automation.Proven experience of developing scalable, responsive, and highly intuitive UIs and dashboards for time-series analytics, insights visualization, reporting functionalities, and other user workflows. Demonstrate excellent front-end capabilities.Strong ownership, documentation discipline, and product mindset. Must have contributed to code reviews, documentation, and engineering standards.3+ years of proven experience in developing production grade full-stack applications using the MERN stack.Nice to haveExperience with microservices, event-driven patterns, and observability (OpenTelemetry/Prometheus/Grafana).Domain exposure to energy/IoT, ML/LLM integration, or geospatial/meteorological datasets.What will we do together? Design and develop full-stack features from spec to production (UI, API, data models, tests, and observability).Build responsive, accessible UIs and dashboards for time-series analytics, excellent visualization, alerts, and workflows.Design and implement secure, and scalable services and REST/GraphQL APIs and maintain their documentation. Model and optimize databases (SQL/NoSQL/time-series) for performance and cost.Maintain CI/CD pipelines, basic infra configs, and deployment hygiene (feature flags, rollbacks, metrics)Write unit/integration/e2e tests; contribute to code reviews, documentation, and engineering standards.Collaborate with product & DS teams to translate user needs into robust, scalable solutions.Job LocationNoida/New Delhi, India. Compensation & BenefitsRemuneration: A competitive remuneration with additional ESOPs. Opportunity to implement and master AI/LLM/algorithms-based data-intensive advanced analytics/AI  platforms.Opportunity to learn and master big-data technologies.Opportunity to work in a conducive environment that challenges your limits and helps you in improving your capacitiesOpportunity to work with Swiss Research Institutions and closely collaborate with top global tech researchersAmple opportunities to learn and grow professionally. We conduct monthly professional & personal productivity workshopsConceptualize, write and live your own startup story with full autonomy and under brilliant mentorshipThe high degree of empathy and work-life balance.How to ApplyPlease fill the forms (https://forms.gle/A4YMG6RHkn87kyQQ7 & https://forms.gle/T2bSTee79N1GKxXa9).