Senior Software Development Engineer (SDE - 3)

As a Software Development Engineer 3, your primary responsibility is to design, build, and operate highly scalable, full-stack software systems that power SatSure's geospatial products end to end. You will own significant parts of the platform - from React frontends to FastAPI services to PostgreSQL data layers running on AWS - and work closely with cross-functional teams, including product managers, data engineers, geospatial analysts, and other software engineers, to ship reliable software that scales to millions of daily transactions with high availability. About SatSure SatSure is a deep tech, decision intelligence company that works primarily at the nexus of agriculture, infrastructure, and climate action, creating impact for the other millions and focusing on the developing world. We want to make insights from earth observation data accessible to all. If you are interested in working in an environment that focuses on impact on society, driven by cutting-edge technology, and where you will be free to work on innovative ideas and be creative with no hierarchies, SatSure is the place for you. Key Responsibilities: Scalable System Design: Architect and build highly scalable, secure, and fault-tolerant systems that support millions of daily transactions with 99.99% uptime, while enabling continuous and rapid deployments across new business lines. Full-Stack Development: Design and implement features end to end - responsive, performant React frontends; robust FastAPI backend services; and well-modelled PostgreSQL data layers - delivering cohesive, maintainable code that enhances the user experience. Backend & API Engineering: Build clean, well-documented REST/async APIs in FastAPI, with sound patterns for authentication/authorization, pagination, validation, and error handling, optimized for minimum latency and high throughput. Frontend Engineering: Develop modular, reusable React components and front-end architecture (state management, routing, code-splitting), collaborating with product and design to translate requirements into intuitive interfaces. Data Layer & Persistence: Design schemas, indexes, and query patterns in PostgreSQL (including geospatial workloads via PostGIS) to ensure optimal performance and scalability for read- and write-heavy operations. Cloud & Infrastructure: Build, deploy, and operate services on AWS, using managed services, containers, and infrastructure-as-code, with attention to cost, security, and observability. Performance Optimization: Identify and address bottlenecks across the stack - frontend rendering, API latency, database queries, caching - using profiling, indexing, partitioning, and parallelization to keep workloads fast at scale. Quality & Reliability: Produce quality code that raises the bar for the whole team on quality and speed. Implement automated testing, CI/CD, monitoring, alerting, and rollback strategies to ensure correctness and resilience in production. Engineering…