R. Raushan
Rishav Raushan

Principal Developer

Rishav
Raushan

Principal Developer and Tech Lead with 10+ years of experience architecting high-performance distributed systems. Proven ability to lead company-wide initiatives, define technical standards, and deliver fault-tolerant, production-grade systems end-to-end. Experienced in leading cross-functional teams, collaborating with international stakeholders, and owning products from concept to delivery.

01

Selected work

Agentic Graph Composer

Visual canvas and CLI for designing and editing LangGraph agent flows, with crash-safe run durability via a Postgres-backed checkpointer, OTel tracing for run visibility, and an eval harness that catches regressions before they ship. Published as a pip package on PyPI.

PYTHONREACTLANGGRAPHLANGGRAPH-CHECKPOINT-POSTGRESPYDANTICCLICKOPENTELEMETRY

Dev Intelligence Platform

Multi-tenant, GitHub-based developer-intelligence platform surfacing PR bottlenecks, review health, and CI reliability from deterministic flow metrics — with classical ML for revert-risk and GenAI confined to grounded narration and clustering.

GOPYTHONFASTAPIKAFKAFLINKPOSTGRES+CITUSCLICKHOUSELANGGRAPHOPENTELEMETRY

FieldOps Copilot

AI triage over NYC 311 service requests: a daily Socrata feed flows through embedding-based dedup (pgvector), a calibrated cascade classifier (cheap Groq tier → OpenAI) with a confidence gate, and a single LangGraph agent loop on only the ambiguous tail — which drafts human-gated work orders. An LLM-as-judge benchmarks the agent against a baseline with stated CIs.

PYTHONFASTAPIPOSTGRES+PGVECTORLANGGRAPHOPENAIGROQLANGSMITHOPENTELEMETRY

Blitz — answers to your NFL questions

Agentic RAG over NFL play-by-play and roster data — a LangGraph router/retrieval/generation/reflection graph backed by ChromaDB, with a model-agnostic chat layer(Anthropic/OpenAI/Groq. Every LLM call is OTel-traced end-to-end.

PYTHONLANGGRAPHCHROMADBSTREAMLITPANDASNUMPYOPENTELEMETRYGRAFANA

Grounded RAG over Wikipedia articles

Grounded RAG over 1K Wikipedia articles — hybrid dense+sparse retrieval, cross-encoder reranking, cited generation, and an explicit abstain path when evidence is weak. Every answer is grounded, scored, ACL-aware, and designed to scale toward 10M docs by swapping infrastructure.

PYTHONFASTAPIQDRANTLANGGRAPHPOSTGRES+PGVECTORCOHERE RERANKOPENAIHUGGING FACEBM25
02

Experience

JAN 2023 — APR 2026

Principal Developer / Tech Lead — PinnacleCode · TOCA Football

Led a 6-engineer team delivering a sports-tech platform across 25+ studios — $4.3M+ in Stripe payments, −18% session failures, real-time booking over a shared Pub/Sub backplane.

NOV 2019 — DEC 2022

Associate Manager / Sr. Developer — UNIRAC

Led UBuilder, a solar design & proposal platform for 500+ customers; cut design-to-proposal cycle by ~8 days and scaled the India team from 3 to 10.

JAN 2018 — NOV 2019

Senior Software Developer — BrightWhite Innovations

Built a secure, auditable bidding repository with state-machine RFP lifecycle, vendor clarifications and immutable audit trails.

AUG 2015 — DEC 2017

Software Developer — Amdocs

Architected an async ingestion pipeline syncing telecom bundling, promotions and regional tax logic into e-commerce checkout flows.

JAN 2015 — JUNE 2015

Software Engineer Intern — NestAway

Developed a lightweight Settlement Reconciliation service that used background workers to scan daily bank settlements against our internal financial ledgers, flagging payment mismatches or double-charges.

03

Capabilities

LANGUAGES
TypeScript · Python · Java
BACKEND
gRPC · Node · Fastify · Django · PostgreSQL · DynamoDB · MongoDB · Kafka · Redis
ARCHITECTURE
Microservices · Event-driven · Pub/Sub · Fault-tolerant · Event Sourcing
FRONTEND
React · Redux · Zustand · TanStack Query
INFRA
AWS · GCP · GitHub Actions · Docker · Kubernetes · Prometheus · OpenTelemetry
APPLIED AI
Agentic Workflows · RAG · LangGraph · Tool Use · Structured Outputs · Eval Harnesses
04

Writing

How I Published My First Python Package on PyPI

Publishing agentic-graph-composer taught me two things worth writing down: skip API tokens for Trusted Publishing, and if your CLI ships a frontend, bundle it into the wheel instead of making users install Node.

Jul 2026
6 min

Sandboxing Your AI Agents: Docker's Cage for Claude Code, Codex, and Cursor

Docker Sandboxes run Claude Code, Codex, and Cursor inside real microVMs. Here's why that's what finally let me leave agents running unattended.

Jul 2026
6 min

When Classical ML Beats LLM

LLMs are not always the right tool. A practical guide to the cases where a gradient boosted tree, a logistic regression, or a simple anomaly detector will outperform a large language model—and cost a fraction of the price.

May 2026
11 min

How I'd Design a Multi-Tenant Booking Platform From Scratch

A general pattern for multi-tenant booking platforms: pre-materialized slots, pessimistic locking at checkout, Stripe webhooks as the source of truth, and an append-only credit ledger, distilled from a real production system.

May 2026
15 min

How Temporal can simplify your microservices mesh

A practical look at moving orchestration out of a chatty service mesh and into durable workflows.

Apr 2026
9 min

Redis for Everything: A Fun Exercise in Building an E-commerce System

A thought experiment in pushing Redis past caching — using it for carts, inventory locks, search, feeds, sessions, and rate limits to see how far its lesser-known data structures actually stretch.

Mar 2026
12 min