SS Sarthak Shrestha Hire me

Backend Engineer / 3+ Years / Java + Python

Backend systems for APIs, AI, and real products.

I am Sarthak Shrestha, a backend developer building secure APIs, database-backed applications, AI-powered services, and production-ready systems with Java Spring Framework, Django, and FastAPI.

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3+ Years backend experience
Java Spring APIs and services
Python Django, FastAPI, AI backends
Cloud Deployable, documented systems

About

I build the part of software that has to be reliable.

I work on backend systems where correctness matters: REST APIs, authentication, permissions, database design, integrations, background workflows, and deployment-ready application structure.

My core stack is Java with Spring Framework and Spring Boot, plus Python backends with Django, FastAPI, and AI service integration. I care about clean boundaries, predictable APIs, testable code, and clear documentation.

sarthakstha93@gmail.com +977 9860191917 shresthasarthak.com.np

Featured Systems

Project case studies that show backend skill, not just UI polish.

FastAPI / AI / RAG

AI Knowledge Base Assistant

A backend for document upload, embedding generation, vector search, source-backed AI answers, chat history, rate limits, and usage tracking.

  • FastAPI with typed request validation and OpenAPI docs
  • PostgreSQL for users, chats, documents, and audit data
  • Vector database workflow for semantic search and RAG
  • Token usage, error handling, and AI response validation
Java / Spring Boot / Microservices

E-commerce Services Backend

A production-style commerce backend with user, product, inventory, order, payment simulation, and notification service boundaries.

  • Spring Security with JWT and role-based access control
  • PostgreSQL schema design with migrations and service layers
  • Redis caching for read-heavy product and session workflows
  • Docker Compose, health checks, and CI test workflow
Django REST / Celery / Redis

Recruitment Management API

A job portal backend for companies, candidates, job postings, resume upload, applications, permissions, search filters, and admin moderation.

  • Django REST Framework with serializers, permissions, and throttling
  • Celery background jobs for emails and application notifications
  • Admin workflows for moderation and operational visibility
  • PostgreSQL-backed search, pagination, and file metadata
Spring / Transactions / Security

Digital Wallet Ledger System

A financial-style backend focused on transaction correctness, wallet transfers, idempotency, balance locking, audit logs, and admin controls.

  • Ledger-first transaction model for traceable money movement
  • Idempotency keys to prevent duplicate transaction processing
  • Database transactions, validation, and failure-safe responses
  • Integration tests for transfer and balance edge cases

Technical Stack

The tools and backend concepts I want visible in my work.

Java Backend

Spring Framework Spring Boot Spring MVC Spring Security Spring Data JPA Hibernate JUnit Mockito

Python Backend and AI

Django Django REST Framework FastAPI Pydantic Celery LLM APIs RAG Embeddings

Databases and Platform

PostgreSQL MySQL Redis SQL Optimization Docker GitHub Actions Nginx Cloudflare

Backend Practices

REST API Design JWT OAuth2 RBAC OpenAPI Testing Logging Monitoring

Proof Signals

What each serious repository should show.

Architecture

Clear service layers, DTOs, validation, migrations, API versioning, and diagrams.

Security

JWT or OAuth2, role-based access, safe config, input validation, and rate limits.

Testing

Unit tests, integration tests, API test examples, and CI checks that run automatically.

Deployment

Docker, environment examples, health checks, production settings, and clear setup docs.

AI Reliability

Prompt templates, retrieval flow, response validation, token tracking, and source citations.

Documentation

README, OpenAPI or Swagger screenshots, database notes, and realistic API examples.

What I Build

Backend work for companies, startups, and product teams.

01

API Development

REST APIs with clean resources, validation, predictable errors, authentication, documentation, and maintainable service logic.

02

AI Backend Services

LLM integrations, RAG pipelines, vector search, AI automation, chat history, usage logging, and response quality controls.

03

Database Systems

PostgreSQL and MySQL schema design, migrations, relationships, query planning, transactions, and data access patterns.

04

Production Readiness

Docker setup, environment configuration, CI/CD workflows, logging, health endpoints, deployment notes, and operational documentation.

Contact

Let us build a backend that can survive real users.

Available for backend projects, API engineering, Java Spring work, Django/FastAPI systems, and AI-integrated backend services.

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