Senior Software Engineer with 3+ years building production systems that serve 30,000+ users. I work across the stack — Java/Spring Boot, Python, React, Go — and ship scalable SaaS, GenAI, and RAG platforms on AWS and Kubernetes.
- Backend & distributed systems — Spring Boot, FastAPI, Django, Kafka, microservices, REST/GraphQL
- GenAI & RAG — LangChain / LangChain4j, OpenAI, pgvector, prompt pipelines, semantic search
- Cloud & DevOps — AWS (EKS, S3, SES, RDS), Kubernetes, Helm, Terraform, GitHub Actions, Prometheus/Grafana
- Frontend — React 18, Next.js, React Native, TypeScript, TailwindCSS, shadcn/ui
- Frappe / ERPNext — custom apps, integrations, payment gateways
- Unity — Multi-tenant SaaS for educational institutions: 200+ data models, 100+ REST APIs, 30K+ users, 4 payment gateway integrations, AWS EKS deployment with 99.9% uptime.
- InvoiceAI — Spring Boot 3 + Kafka + Tesseract + GPT-4 Vision document pipeline; 94% extraction accuracy across 12 invoice formats; Redis caching cut LLM costs by 45%.
- SynthHub — Multi-tenant GenAI platform: 8 Spring Boot microservices, RAG over 100K+ docs with LangChain4j + pgvector, JWT/RBAC, deployed on Kubernetes.
Java Python Go TypeScript Spring Boot FastAPI React Next.js PostgreSQL Redis Kafka Docker Kubernetes AWS LangChain pgvector
- LinkedIn — linkedin.com/in/badalsahani
- Email — badalsahani194@gmail.com