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Open to backend & AI engineering roles

Hey, I'm Ratnesh Mishra

> Backend Engineer

Backend AI engineer with 2+ years building event-driven microservices in Go, Java and Python. I ship RAG and LLM systems alongside complete, secure backends — from data pipelines to cloud deployment — with a bias toward performance and reliability.

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Portrait of Ratnesh Mishra
Go · gRPC
RAG
Experience

Where I've shipped

Three years across product engineering, open-source FinTech infrastructure and AI-assisted platforms — always on the side of the stack that has to stay up.

Waldo

Current

Backend Engineer

Mar 2025 — Present
Remote
  • Developed 5 microservices in Go and Python for an e-commerce fulfillment platform, communicating over gRPC and RabbitMQ, deployed on AWS EKS via Terraform and ArgoCD.
  • Reduced API response time by ~67% by parallelizing previously sequential API calls with goroutines, errgroup and worker pools, while leveraging Redis caching and batched queries to eliminate N+1 access patterns.
  • Implemented a Redis + Lua token-bucket rate limiter enforcing per-tenant Amazon, StockX and eBay quotas.
  • Built a RAG-based AI assistant for warehouse operators, embedding semantically chunked SOPs and marketplace docs with voyage-4-lite into Pinecone for hybrid retrieval and cited answers using Claude Sonnet 4.5.
  • Designed the Amazon FBA and FBM pipelines using SP-APIs, with AWS Location for route scoring and Next.js for the operator UI, cutting warehouse shipment-prep time from ~30 minutes to under 10 per shipment.
GoPythonPostgreSQLRabbitMQRedisPineconeAWSTerraform

TrainingMug

Backend Developer Intern

Jun 2023 — Nov 2024
Remote
  • Constructed CI/CD pipelines and developed a containerized coding environment using Docker and Bash.
  • Built AI-powered ATS resume scoring and adaptive mock-interview services with Java, Spring Boot and Azure OpenAI, using pgvector for resume–JD matching.
  • Integrated RabbitMQ for asynchronous communication between services.
JavaSpring BootpgvectorDockerCI/CD

The Mifos Initiative

Summer Intern · C4GT 2024

Jun 2024 — Sep 2024
Remote
  • Maintained Mifos-Gazelle, a deployment tool built on Kubernetes (K3s) and Helm charts that orchestrates FinTech platforms including PaymentHub EE, Fineract and Mojaloop.
  • Resolved ingress configuration issues in the Helm charts for 10+ services across PaymentHub and Mojaloop.
  • Configured and updated the PH-EE Mojaloop connector service, including its BPMN diagrams, to support Mojaloop's vNext and latest components.
K3sHelmSpring BootMojaloopFineractBPMN
Projects

Things I've built

Side projects where I get to pick the constraints — mostly distributed systems, retrieval pipelines and the plumbing that ties them together.

Vibino

A microservices RAG platform for codebases — index any repository, then ask it questions in plain language.

  • Go and Echo services with a Tree-sitter code indexer extracting symbols, call and import graphs into PostgreSQL.
  • voyage-code-3 embeddings of AST-boundary chunks as 1024-dim vectors in Pinecone, fanned out over RabbitMQ worker queues for summaries from qwen3-coder:30b.
  • SHA-256 content-hash incremental indexing re-embeds only files changed by a push, cutting re-indexing cost ~90%.
GogRPCRabbitMQPostgreSQLPineconeOllamaDockerNext.js

Book Microservices

A book-lending platform that demonstrates a production-shaped Spring Cloud microservice topology.

  • Spring Boot services behind Spring Cloud Gateway with Eureka service discovery.
  • Resilience4j circuit breakers with Prometheus + Grafana observability.
  • Event streaming over Apache Kafka with Cassandra persistence, containerized via Docker Compose.
JavaSpring BootApache KafkaCassandraDocker

Felix

Movie streaming backend with seamless playback, trending charts, watchlists and an admin upload portal.

JavaSpring BootJWT

Musicoo

Complete backend for a Flutter music streaming app — gapless playback, charts, playlists and an artist portal.

JavaSpring BootPostgreSQL

Spring Boot SocketIO

Reference implementation for wiring Socket.IO WebSockets into Spring Boot with JWT authentication.

JavaSpring BootWebSocket

To-Do-Go

A compact CRUD service in Go built with Gin and GORM — the smallest useful Go backend.

GoGinGORM
Browse everything on GitHub
Toolkit

What I work with

The stack I reach for day to day — chosen for the shape of the problem, not for novelty.

Languages

Go Java Python JavaScript TypeScript SQL Bash

Frameworks

Spring Boot Spring Cloud Echo Node.js Express NestJS Next.js React gRPC Protobuf

AI & LLM

RAG Vector Embeddings Hybrid Search Claude API Azure OpenAI Voyage AI Ollama Tree-sitter

Databases

PostgreSQL MySQL MongoDB Cassandra Redis Pinecone pgvector

Cloud & DevOps

AWS Azure Docker Kubernetes Helm Terraform ArgoCD CI/CD

Messaging & Observability

RabbitMQ Apache Kafka Prometheus Grafana Git Linux
Writing

Notes from the build

Occasional write-ups on the problems that were annoying enough to be worth documenting.

Sep 9, 2024 · 6 min read

Spring Boot WebSockets: Socket.io + Authentication + Postman

Set up WebSocket communication in Spring Boot with Socket.IO — configuration, event handling and JWT authentication for secure real-time interactions, plus how to test it all in Postman.

Spring BootSocket.IOWebSocketSpring Security

More posts in progress — mostly Go concurrency and retrieval pipelines.

Follow me on DEV →
About

I make backends that hold up when the traffic does.

I build event-driven backends and RAG systems that stay fast under load.

Distributed Backends

Event-driven microservices in Go and Java talking over gRPC and RabbitMQ, tuned with goroutines, worker pools and Redis caching.

RAG & LLM Systems

Semantic chunking, hybrid retrieval over Pinecone and pgvector, and cited answers grounded in real documents — not vibes.

Cloud & Delivery

AWS EKS via Terraform and ArgoCD, Helm-packaged services, CI/CD pipelines and Prometheus + Grafana observability.

Education

B.Tech, Computer Science and Engineering

Dr. A P J Abdul Kalam Technical University (AKTU)

Nov 2021 — Jun 2025 Uttar Pradesh, India

Recognition

  • AWS Certified Cloud Practitioner Credential ID DRQL0XCLNBVQ1GG4
  • Finalist — Hackmol 4.0 National hackathon at NIT Jalandhar
  • Maintained akgec.ac.in Secured, updated and maintained my college's official website
Contact

Got a backend that needs to be faster, smarter or calmer?

I'm open to backend and AI engineering roles, and I always reply to a good problem. The fastest way to reach me is email.

ratneshmishrarulz@gmail.com +91 96964 85545