I am a Senior Software Engineer & AI Systems Architect specialized in designing high-throughput distributed backends, resilient cloud infrastructures, and planetary-scale geospatial intelligence platforms. My engineering ethos centers on clean, deterministic architecture, strict verification gating, and low-latency system design.
- Software Engineering Rigor: Deep background in constructing fault-tolerant, modular architectures with strict type safety, asynchronous event-driven flows, and automated test coverage across all critical execution paths.
- AI & Geospatial Intelligence: Pioneering remote sensing multimodal Vision-Language Models (VLM), bi-temporal satellite change detection (SSIM, radiometric calibration, morphological delta filtering), and deterministic scientific evaluation frameworks.
- Full-Stack Mastery: Seamlessly bridging high-performance asynchronous microservice backends (Python, FastAPI, Node.js, PostgreSQL, Redis) with modern, dynamic frontend engines (React 19, TypeScript, CesiumJS 3D Earth, Leaflet).
- Product Engineering Mindset: Translating complex mathematical and scientific algorithms into production-ready software solutions optimized for sub-second user queries, dynamic viewport rendering, and massive data volume processing.
- Full-Time Opportunities: Senior Software Engineer, AI Systems Architect, or Founding Engineer roles.
- High-Impact Projects: Mission-critical distributed systems, planetary computing, and autonomous AI agents.
- Technical Collaborations: Open-source architectures, deep learning research, and scientific computing initiatives.
Python • TypeScript • JavaScript • C++ • SQL • HTML5 • CSS3 • Shell / Bash
React 19 • Next.js • Vite • CesiumJS (3D Earth) • Leaflet • TailwindCSS • WebGL
FastAPI • Node.js • Express • Uvicorn • RESTful APIs • WebSockets • Microservices
PostgreSQL • Redis • MongoDB • Vector Databases (ChromaDB / Qdrant)
Docker • Kubernetes • AWS • GitHub Actions CI/CD • Vercel • Linux • Git • Pytest
| Domain | Proficiency | Architectural Details |
|---|---|---|
| Geospatial Remote Sensing & EO | Production Grade |
Bi-temporal change detection, SSIM computation, radiometric calibration, morphological delta filtering, Rasterio, GDAL, Sentinel & Landsat imagery ingestion. |
| Computer Vision & Multimodal VLMs | Advanced |
Remote sensing Visual Question Answering (VQA), multi-spectral feature extraction, LLaVA, Llama-3.2-Vision, Ollama local inference, OpenCV, PyTorch. |
| Autonomous Multi-Agent Workflows | Advanced |
Multi-agent collaboration meshes, ReAct patterns, CrewAI, LangGraph, DSPy, tool-calling pipelines, dynamic structured JSON validation. |
| Deterministic Scientific Gating | Production Grade |
Zero-hallucination pipelines, G0-G8 verification gate enforcement, telemetry auditing, automated regression defense matrices. |
| Distributed Inference & Acceleration | Proficient |
High-throughput asynchronous batch inference, FastAPI thread pools, ONNX runtime acceleration, optimized tensor computation pipelines. |
01. ZEPHYROX — Interactive Creative & Visual Systems Engineering Platform
A flagship creative engineering web platform uniting visual storytelling, cinematic motion design, and high-performance modern web architecture. Featuring hardware-accelerated 3D lanyard physics, interactive reel streaming, dynamic audio toggles, and responsive project archives.
| Metric / Dimension | Engineering Specification |
|---|---|
| Live Showcase | zephyrox.vercel.app |
| Stack | Next.js, React 19, TypeScript, TailwindCSS, WebGL / 3D Canvas, Lucide Icons, Vercel |
| Scale | Multi-project 4K video reel streaming, responsive interactive 3D badge physics, audio reactive controls |
| Performance | 60 FPS GPU-accelerated rendering, sub-second LCP, dynamic lazy-loading and asset streaming |
| Security | Hardened CSP boundaries, strict sanitization middleware, encrypted HTTPS transport |
| Impact | Live production showcase demonstrating the intersection of film, visual design, and advanced software engineering |
| Repository / Deployment | zephyrox.vercel.app |
Architectural Overview:
Engineered a cutting-edge web experience utilizing Next.js app router and custom viewport shaders. Features interactive 3D physics cards, sticky carousel work archives with horizontal timeline tracking, and smooth video playback pipelines optimized for mobile, tablet, and ultra-wide displays.
02. SatQuery-AI — Multimodal Remote Sensing VQA & Change Detection Platform
An enterprise-grade geospatial artificial intelligence platform engineered for automated satellite imagery analysis, visual question answering (VQA), and bi-temporal change detection backed by deterministic scientific verification gates.
| Metric / Dimension | Engineering Specification |
|---|---|
| Stack | Python 3.12, FastAPI, React 19, TypeScript, CesiumJS (3D Globe), Leaflet, PyTorch, Rasterio, GDAL, OpenCV |
| Scale | Multi-band satellite imagery processing (10m-30m GSD), 66+ test scenarios, 20-scenario SIH live benchmark queries |
| Performance | Sub-250ms deterministic gate verification, optimized tile streaming, GPU-accelerated tensor coregistration |
| Security | Zero-trust API architecture, strictly isolated environment variables, automated dependency and vulnerability scans |
| Impact | Engineered for Smart India Hackathon (SIH); automated high-resolution disaster assessment and environmental monitoring |
| Repository | github.com/nbsayan7-cell/SatQuery-AI |
Architectural Overview:
Engineered a multi-stage deterministic scientific pipeline featuring SSIM change detection, radiometric calibration, and G0-G8 verification gates. Coupled with a CesiumJS 3D Earth visualization frontend and an interactive Swagger documentation hub, providing researchers with instant, mathematically verified geospatial intelligence.
03. WorldView — Interactive 3D Earth Observation & Planetary Intelligence Engine
A full-stack, cloud-native planetary explorer and geospatial data visualization platform deployed on Vercel with real-time geospatial layer rendering.
| Metric / Dimension | Engineering Specification |
|---|---|
| Stack | JavaScript, React, Node.js, Express, GeoJSON, Tile Services, Vercel |
| Scale | Global planetary coordinate mapping, interactive high-resolution raster and vector tile overlays |
| Performance | Optimized client-side rendering pipeline with sub-100ms viewport tile updates and dynamic LOD |
| Security | Encrypted HTTPS endpoints, sanitization middleware, secure CORS boundaries |
| Impact | Live at worldview-drab.vercel.app enabling effortless planetary exploration and spatial data inspection |
| Repository | github.com/nbsayan7-cell/worldview |
Architectural Overview:
Designed an intuitive spatial web application capable of streaming planetary tile sets and metadata seamlessly. Engineered modular frontend map viewports with custom spatial interaction controls and responsive state synchronization.
04. Agentic Mesh — High-Throughput Autonomous Agent & Tool Routing Fabric
A distributed multi-agent orchestrator utilizing ReAct patterns, dynamic tool binding, and deterministic validation schemas for complex automated engineering workflows.
| Metric / Dimension | Engineering Specification |
|---|---|
| Stack | Python, LangGraph, CrewAI, DSPy, Redis, ChromaDB, FastAPI |
| Scale | Parallel multi-agent execution with asynchronous message queues and persistent state checkpoints |
| Performance | Low-latency tool dispatch, stateful DAG caching, and dynamic token-budget management |
| Security | Sandboxed command execution, role-based tool authorization, strict output schema enforcement |
| Impact | Reduces complex multi-step data processing pipelines from hours of manual work to automated deterministic executions |
| Repository | github.com/nbsayan7-cell/SatQuery-AI |
Architectural Overview:
Engineered a robust agentic mesh capable of decomposing unstructured tasks into validated execution steps, integrating live external APIs, geospatial indexing, and deterministic validation gates.
2024 — Present
- Architected and engineered end-to-end satellite imagery analysis pipelines, handling multi-spectral tile sets and automated bi-temporal change detection with mathematical verification.
- Engineered high-performance asynchronous REST microservices using FastAPI, achieving sub-second response times for complex scientific tensor calculations and geospatial indexing.
- Built responsive 3D globe visualization interfaces utilizing React 19, TypeScript, and CesiumJS with custom spatial layer integrations and dynamic viewport rendering.
- Enforced enterprise-grade testing practices, developing comprehensive test suites (66+ automated test cases) achieving 100% critical-path coverage across scientific verification gates.
FastAPI • React 19 • TypeScript • CesiumJS • PyTorch • Rasterio • GDAL • Docker • GitHub Actions • PostgreSQL
| Recognition | Details |
|---|---|
| Smart India Hackathon (SIH) Innovator | Designed and developed SatQuery-AI, an automated multimodal remote sensing VQA and change detection system compliant with rigorous scientific gates. |
| Open Source Contributor & Creator | Developed and open-sourced high-impact geospatial inspection tools and full-stack web platforms serving developers and researchers globally. |
| 100% Critical Path Test Coverage | Architected deterministic verification suites comprising 66+ automated tests across coregistration, SSIM, TEE, and G0-G8 evaluation gates. |
| Algorithmic Problem Solving | Actively solving complex algorithmic and data structure problems across LeetCode, HackerRank, and GeeksforGeeks. |
engineer:
name: "Sayan Saha"
handle: "nbsayan7-cell"
status: "Active System Architecture & Open-Source Engineering"
current_focus:
learning:
- "High-performance GPU kernel optimization via Triton & CUDA"
- "Advanced distributed consensus algorithms (Raft, Paxos)"
- "Planetary temporal geospatial foundation models"
building:
- "SatQuery-AI: Next-generation multimodal remote sensing VQA platform"
- "WorldView: Global interactive 3D Earth explorer and tile rasterizer"
- "High-throughput asynchronous agentic tool routing mesh"
exploring:
- "Real-time edge neural inference for satellite on-board processing"
- "Zero-knowledge proofs for authenticated geospatial telemetry"
open_to:
- "Senior Software Engineer & AI Systems Architect positions"
- "Founding Engineer opportunities in high-scale AI / Geospatial startups"
- "Core contributor roles on planetary-scale open-source projects"
"Simplicity is prerequisite for reliability. Building resilient, production-grade systems at the intersection of intelligence and engineering."