Harsh Kankariya

Software Engineer

India $4/hr Hybrid Full-time 1+ yrs exp 88 · Excellent

About

Software Engineer targeting Java/Spring Boot backend and microservices roles, with 1.5+ years of experience building scalable, production-grade systems. Proficient in Java, Spring Boot, Node.js, Redis, JWT and cloud deployment (AWS). Hands-on experience in RAG, LLM integration, and MCP. Strong DSA foundation with 1000+ problems solved and LeetCode Knight ranking (Top 4%).

Skills & Expertise (45)

Node.js Intermediate

7.5/10

Years Exp

JavaScript Intermediate

7.0/10

Years Exp

Spring Boot Intermediate

7.0/10

Years Exp

REST APIs Intermediate

7.0/10

Years Exp

Microservices Intermediate

7.0/10

Years Exp

Java Intermediate

6.5/10

Years Exp

Kubernetes Intermediate

6.5/10

Years Exp

Docker Intermediate

6.5/10

Years Exp

AWS Intermediate

6.5/10

Years Exp

Postgresql Intermediate

6.5/10

Years Exp

Redis Intermediate

6.5/10

Years Exp

Secure API Design Intermediate

6.5/10

Years Exp

Redis caching Intermediate

6.5/10

Years Exp

Node-RED Intermediate

6.0/10

Years Exp

Maven Intermediate

6.0/10

Years Exp

JPA Intermediate

6.0/10

Years Exp

Terraform Intermediate

6.0/10

Years Exp

Prometheus Intermediate

6.0/10

Years Exp

SonarQube Intermediate

6.0/10

Years Exp

Hibernate Intermediate

6.0/10

Years Exp

MongoDb Intermediate

6.0/10

Years Exp

Express.js Intermediate

6.0/10

Years Exp

MySql Intermediate

6.0/10

Years Exp

JUnit Intermediate

6.0/10

Years Exp

Git Intermediate

6.0/10

Years Exp

Session management Intermediate

6.0/10

Years Exp

Mockito Intermediate

6.0/10

Years Exp

OOP Intermediate

6.0/10

Years Exp

JWT Intermediate

6.0/10

Years Exp

Postman Intermediate

6.0/10

Years Exp

Python Intermediate

5.5/10

Years Exp

RAG Beginner

5.0/10

Years Exp

LLMs Beginner

5.0/10

Years Exp

Jasmine Intermediate

5.0/10

Years Exp

Distributed Systems Intermediate

5.0/10

Years Exp

FastAPI Intermediate

5.0/10

Years Exp

FAISS Beginner

4.0/10

Years Exp

OpenAI API Beginner

4.0/10

Years Exp

Prompt Engineering Beginner

4.0/10

Years Exp

MCP Beginner

4.0/10

Years Exp

LangChain Beginner

4.0/10

Years Exp

Agentic RAG Beginner

4.0/10

Years Exp

C++ Beginner

4.0/10

Years Exp

GitLab CI Token

Work Experience

Software Engineer (Contract)

Freelance

Apr 2026 - Present

Building Field Survey & Grievance Portal — full-stack platform for field agents, supervisors, admins, and citizens; backend in Spring Boot + PostgreSQL with role-based JWT auth. Implemented QR-code-based citizen login — QR scan links villagers directly to grievance submission forms; designed RESTful APIs for survey creation, assignment, and status tracking. Upskilling in agentic AI, microservices patterns, Kubernetes, Terraform, and advanced LLM orchestration.

Software Development Engineer

Avalara

Jan 2025 - Mar 2026

Architected Content-Consumer microservice (Spring Boot) processing 1–5 GB taxonomy files from AWS S3; applied Factory & Strategy design patterns to support 10+ countries with zero core-code changes. Designed curation pipeline with JPA/Hibernate batch processing and PostgreSQL as source of truth; generated mandates, code lists, and specifications with 90%+ SonarQube coverage. Implemented Redis token caching (7-day refresh / 15-min access) achieving 95% cache hit rate; deployed via Docker on AWS ECS with Prometheus monitoring. Built Node.js orchestration pipelines (Node-RED) coordinating file ingestion, format conversion, VAAS validation, tax calculation, and downstream microservice integration across 10+ country mandates. Built Node.js S3 automation tool to auto-fetch curated artifacts and update repo configs, reducing manual handoff time by 30%. Configured GitLab CI/CD with automated quality gates; resolved 15+ production issues/month as on-call engineer, cutting MTTR by 20%. Refactored sequential batch jobs to parallel execution using Node.js Worker Threads and BullMQ, cutting runtime from 60 to 10 minutes (6x) and deployment failures by 35%.