Arnav Panigrahi
Backend systems, full-stack applications, and AI/ML pipelines shipped to production.
About
I write backend services and ML systems that run in production. Lately that's been FastAPI microservices, LangChain agents, and multi-modal models. I did my M.S. in CS at UC Riverside and I'm based in California.
Outside of work, I play guitar, sink hours into JRPGs, and tinker with OSS and agentic harnesses. I collect keyboards - HHKB is the only correct answer - and use Mario Zechner's pi agentic harness. I'm slowly teaching myself Japanese.
Where I've worked
Software Developer
AllCheer- Built a LangChain AI agent for ROI workflows, automating authorization checks, compliance validation, and document generation while cutting processing time by 60% and saving $20K/year.
- Engineered a containerized FastAPI service that emulates authenticated RethinkBH sessions for real-time clinical record sync, bypassing 24-48-hour public API latency.
- Developed a React + FastAPI NER pipeline using OpenAI for structured data extraction from therapist notes at 92% accuracy.
Software Developer Intern
AllCheer- Designed a Python logistics engine on Google Cloud with Google Maps APIs for multi-stop route optimization and large-scale staff scheduling.
- Led backend R&D and API schema design for ROI automation, moving Make.com prototypes into production service architecture.
Junior Software Developer
Pinnacle Consulting LLC- Integrated ArcGIS Online with Angular and .NET for a $75M utility provider, enabling real-time infrastructure visualization and reducing oversight errors by 30%.
- Delivered three full-stack ERP systems with Node.js and SQL Server, implementing JWT-based RBAC and complex query workflows to automate invoicing.
Tools I work with.
Languages & Frameworks
- Python
- TypeScript
- JavaScript
- C#
- .NET
- FastAPI
- React
- Angular
- Astro
AI & Data Systems
- LangChain
- LangGraph
- PyTorch
- Vector Search
- Embeddings
- Prompt Engineering
Infrastructure & Delivery
- Google Cloud
- Docker
- AWS
- REST APIs
- Node.js
- SQL Server
- PostgreSQL
- SQL
- Git
Selected work
NEATBird
GPU-Accelerated Neuroevolution
- NEAT evolves graph structure while REINFORCE optimizes weights
- JAX batches matching DAGs with vmap and simulates episodes with lax.scan
- Seed-0 champion cleared 66 pipes and averaged 20.1 across 100 held-out schedules
bedtime.ai
Multi-Modal AI Storytelling Platform
- 4 models orchestrated in a single pipeline
- ~70% classification accuracy on children's drawings
- 35 backend + 19 frontend tests
Sabi Agent
Rust Coding-Agent Harness
- OpenAI-compatible agent loop with read, write, edit, bash, search, and web tools
- JSONL sessions with cwd-aware resume, command history, and skill invocation
- Tauri desktop shell with project selection, approval cards, and collapsible diffs
PR Review Agent
Cloudflare GitHub App Review Bot
- Webhook-first PR review flow with HMAC verification before parsing
- Bounded diff and file-context collection with typed Valibot review output
- Update-in-place review comments with severity, recommendation, findings, and metadata
An offline-first WaniKani study app for Android with SQLite-backed incremental sync, review flows, and romaji-to-kana answer checking. Jest-covered domain logic.
A real-time collaborative site with live cursor sharing and viewer presence. Built on Cloudflare Workers, Durable Objects, and SvelteKit 5.
An interpretability study on LiquidAI/LFM2.5 that identifies and removes refusal directions via weight orthogonalization. Reduced model refusal rate from 50% to ~37% without retraining.
A containerized FastAPI service deployed on Google Cloud Run that emulates authenticated user sessions against RethinkBH endpoints to sync appointment and authorization data in real time, bypassing 24-48-hour API latency for downstream applications.
A production-ready RAG pipeline for querying Star Wars scripts with LangChain, OpenAI embeddings, and Qdrant. Expanded from a tutorial into a configurable system with prompt-injection hardening, source attribution, ~30x cost reduction using GPT-4o-mini, and a 28-test suite.