Abhinav Kumar

Backend Software Engineer

I build scalable backend systems, APIs, and distributed services with Python, Go, Java & NodeJS — optimized for performance, reliability, and real-world.

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Technical Arsenal

Backend, distributed systems, and cloud engineering skills aligned with global Python & Go roles.

Go & Python Core

  • Go (Golang)
  • Goroutines & Channels
  • Context & Cancellation
  • Go Profiling (pprof)
  • gRPC & Protobuf
  • Python 3.10+
  • Asyncio & Async APIs
  • Type Hints & mypy
  • FastAPI

Backend Architecture

  • REST API Design
  • JWT / OAuth2
  • Pagination & Filtering
  • Rate Limiting
  • Microservices
  • Event-Driven Architecture
  • Circuit Breakers

Databases & Streaming

  • PostgreSQL
  • Query Optimization
  • Transactions & Isolation
  • Redis (Caching)
  • MongoDB
  • Apache Kafka
  • Elasticsearch

Cloud & DevOps

  • AWS (EC2, S3, RDS)
  • Docker
  • Kubernetes
  • Terraform
  • CI/CD (GitHub Actions)
  • Linux

Observability & SRE

  • Prometheus
  • Grafana
  • OpenTelemetry
  • Structured Logging
  • SLIs / SLOs

System Design & Security

  • Scalability & Load Balancing
  • Caching Strategies
  • Graceful Shutdowns
  • OWASP Top 10
  • RBAC & API Security

Professional Journey

Building value through engineering excellence.

Software Developer 1

Collegedunia
Sep 2024 – Present Gurgaon, India
  • Owned a greenfield Spring Boot MVC CRM replacing Zoho, saving licensing costs and enabling 200+ internal users.
  • Optimized MySQL queries and indexes to achieve p95 < 150ms on core workflows.
  • Implemented Redis caching strategy, reducing ad-asset retrieval p95 by 60%.
  • Integrated GitHub Actions CI and Docker for automated releases and rollbacks.
JavaSpring BootMySQLRedisDockerAWS

Backend Developer

Pinsout Innovation
Jan 2024 – July 2024 Noida, India
  • Built Spring Boot microservices processing 10k+ daily records with validation and deduplication.
  • Hardened services with idempotency keys and retry mechanisms, stabilizing SLAs.
  • Mentored interns on Java OOP and DTO/entity mapping best practices.
JavaSpring BootMongoDBMicroservices

Featured Projects

Engineering solutions for real-world problems.

View All on GitHub

Distributed File System

A scalable and fault-tolerant distributed file system designed to store, manage, and serve very large files across a cluster of nodes. The system uses chunk-based storage, coordinated metadata management, and data replication to ensure high availability, durability, and efficient large-file access.

Supports large files via fixed-size chunkingHorizontally scalable storage nodesReplication-based fault toleranceCentralized or coordinated metadata management
#Go#Distributed Systems#Chunk-based Storage#Replication#Fault Tolerance#Cluster Architecture

Real-Time Chat Application

Architected a multi-room chat system with < 300ms latency using WebSocket pub/sub. Implemented back-pressure controls and message durability.

< 300ms LatencyPub/Sub ArchitectureDockerized
#Spring Boot#WebSocket#Redis#MongoDB#Docker

CRM Automation System

Replaced vendor CRM with a custom Spring MVC solution. Modeled normalized schemas and optimized heavy lookups with Redis caching.

p95 < 150msCost ReductionRBAC
#Spring Boot#MySQL#Hibernate#Redis#AWS

Trendy E-commerce Platform

Full-stack e-commerce solution with auth, cart, and Stripe payments. Optimized database queries and implemented lazy loading for performance.

Stripe IntegrationAdmin DashboardOptimized
#React.js#Node.js#MongoDB#Express

StreamStack : AI-Powered Movie Streaming Platform

A production-ready full-stack movie streaming system with a scalable Golang backend, modern React frontend, MongoDB data layer, and AI-powered search and recommendations using OpenAI and LangChainGo.

AI-Powered SearchScalable BackendClean ArchitectureProduction-Ready
#Go (Golang)#React#MongoDB#OpenAI API#LangChainGo#REST API#JWT Authentication#Clean Architecture

Social Media Platform : Memories

A MERN-based social media application with secure authentication and core post management features.

REST APIsJWT AuthFull-Stack
#React#Node.js#Express.js#MongoDB#JWT Authentication#REST API

Ready to Scale?

I am currently open to backend engineering roles (Remote or Relocation). Let's discuss how I can contribute to your team's engineering goals.

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© 2025 Abhinav Kumar