Available for Freelance Projects & SDE Roles
Pune, India • Remote Global

Hi, I'm Nikhil Ingale

I architect & build as a

High-velocity Full-Stack Engineer crafting resilient, distributed backend services with Spring Boot & PostgreSQL, paired with reactive, intuitive frontend web architectures in React.js.

Explore Engineering Work Hire for Projects Quick Email
0.0 CGPA (B.Sc. IT)
0 REST APIs Built
0 Automation Efficiency
Full-Stack Java Certified
Nikhil Ingale - Full Stack Java Engineer
Nikhil Ingale
Full-Stack Java & React SDE
Available for Projects & Full-Time Roles
Java 17 Spring Boot React.js PostgreSQL Docker
AuthController.java — Spring Boot 3.x
JWT Secured 
@RestController
@RequestMapping("/api/v1/auth")
@CrossOrigin(origins = "*")
public class AuthController {

    @Autowired
    private AuthenticationManager authManager;
    @Autowired
    private JwtTokenProvider tokenProvider;

    @PostMapping("/login")
    public ResponseEntity<AuthResponse> authenticate(
            @Valid @RequestBody LoginRequest req) {
        
        Authentication auth = authManager.authenticate(
            new UsernamePasswordAuthenticationToken(
                req.getEmail(), req.getPassword())
        );
        String jwt = tokenProvider.generateToken(auth);
        return ResponseEntity.ok(new AuthResponse(jwt));
    }
}
High-Concurrency Backend Docker • Neon PostgreSQL • Render
Competency Matrix

Architectural & Engineering Skillset

Engineered for production scale. Deep foundational knowledge across core CS principles, backend frameworks, relational databases, and modern reactive client architectures.

Backend & Microservices

Robust & High Throughput
Java (Core & Adv) Spring Boot 3.x FastAPI (Python) Spring Security & JWT RESTful APIs Spring MVC Spring Data JPA Hibernate ORM JDBC & Servlets JSP Microservices (Basic)

Frontend Engineering

Reactive & Pixel-Perfect
React.js JavaScript (ES6+) Redux Toolkit HTML5 Semantic Modern CSS3 Bootstrap 5 Responsive UI/UX jQuery

Databases & Architecture

ACID & High-Performance SQL
PostgreSQL Supabase (PostgreSQL 15 & RLS) Neon Serverless DB MySQL Schema Normalization Complex SQL Queries Indexing & Optimization

DevOps, Cloud & Tools

Containerization & CI/CD
Docker Containers Git Version Control GitHub CI Workflows Apache Maven Postman API Testing Render Cloud Netlify CDN IntelliJ IDEA VS Code

CS Fundamentals & Design

Engineering Rigor
Data Structures & Algorithms OOP & SOLID Principles MVC Architecture Java Collections Framework Exception Handling System Design Basics

Active Learning & AI

Continuous Expansion
RAG (Retrieval Augmented Gen) Vector Search & Embeddings Groq Cloud LLMs (Llama 3) Python & AI Engineering Machine Learning AWS (EC2, S3, RDS) Kubernetes CI/CD Pipelines
Production Projects

Featured Full-Stack Architectures

Real-world applications engineered with end-to-end full-stack principles, security compliance, containerized deployment, and measurable operational impact.

RAG Architecture • Groq LLM (Llama 3) • FastAPI & React

CareerOS — AI Career Platform for College Students & Freshers

High-velocity career intelligence platform engineered with Retrieval-Augmented Generation (RAG), vector similarity matching, sub-second Groq LLMs, and multi-tenant Supabase PostgreSQL.

  • RAG & Vector Semantic Engine: Built an in-memory vector embedding engine calculating cosine similarity across company intelligence corpora for dynamic job matching and hyper-targeted cover letters.
  • FastAPI & Groq AI Microservices: Architected asynchronous RESTful microservices interfacing with Groq Llama-3 models for instant multi-vector ATS resume scoring and adaptive mock technical interviews.
  • Secure Multi-Tenant Cloud Architecture: Implemented Supabase PostgreSQL with strict Row-Level Security (RLS) policies, isolated resume storage buckets, and containerized Docker deployment.
React.js FastAPI Python RAG Pipeline Vector Embeddings Groq LLM (Llama 3) Supabase (PostgreSQL) Row-Level Security (RLS) Docker Vercel
Live Application Source Code Architecture
RAG & pgvector • Multi-Source Verification • FastAPI & React 18

AI Research Agent — Autonomous Evidence-Grounded Research System

Autonomous, multi-stage research intelligence system engineered with dynamic query decomposition, concurrent web scraping, on-edge vector embeddings, pgvector semantic retrieval, and an independent claim-verification gate that guarantees strictly cited, hallucination-free research reports.

  • Multi-Query RAG & Hybrid Retrieval: Engineered an end-to-end RAG pipeline pairing Supabase pgvector cosine similarity with a local BM25 candidate filter and document-diversity capping to maximize recall while reducing noisy context.
  • 2-Tier Claim Verification Engine: Built an automated fact-checking gate that extracts atomic assertions from retrieved evidence and verifies truthfulness (Supported, Contradicted, Insufficient) using batched LLM analysis before synthesis.
  • On-Edge Vector Embeddings: Deployed 384-dimensional gte-small vector inference on Deno-powered Supabase Edge Functions, achieving zero-cost embedding generation within free-tier compute limits.
  • Robust Async Microservices: Architected asynchronous Python FastAPI backend with bounded concurrency semaphores, X-Request-ID tracing, sliding-window rate limiting, and strict citation validation schemas.
React 18 TypeScript FastAPI Python 3.11 pgvector Supabase (PostgreSQL) BM25 Ranking gte-small Embeddings Tavily Search API Docker
Live Application Source Code Architecture
Spring Security & JWT • 20+ REST APIs

Enterprise Full-Stack E-Commerce Platform

High-performance, containerized multi-tier commerce ecosystem built with Spring Boot, React.js, and serverless PostgreSQL, featuring stateless token authentication and granular role-based controls.

  • 20+ RESTful APIs: Architected complete lifecycle endpoints for catalog search, cart operations, checkout, and inventory management.
  • Spring Security & JWT RBAC: Implemented dual-role authentication differentiating admin product management from customer transactional flows.
  • Modern Cloud Deployment: Dockerized containerized backend deployed on Render with Netlify frontend CDN and Neon Serverless PostgreSQL.
React.js Spring Boot PostgreSQL (Neon) Spring Security JWT Auth Docker Render Netlify
Live Application Source Code Architecture
80% Workflow Effort Reduction • 15+ Endpoints

Employee Leave Management & Approval System

Full-stack enterprise leave tracking platform automating multi-tiered organizational approval workflows, role-based dashboards, and audit-compliant status logs.

  • Automated Approval Engine: Reduced manual administrative leave-processing overhead by approximately 80% with real-time status transitions.
  • 15+ Backend Endpoints: Designed and integrated robust CRUD operations handling employee requests, manager reviews, and organizational reports.
  • Transactional JDBC Integrity: Built reliable database layers with MySQL connection pooling ensuring zero data inconsistency during concurrent approvals.
JSP Servlets JDBC MySQL 8.0 MVC Architecture HTML5 / CSS3
Live Application Source Code Architecture
System Design & Flowcharts

Production System Architectures

Interactive architectural breakdowns illustrating request-response pipelines, security filter chains, state management, and high-throughput database layers.

Experience

Work History & Impact

Demonstrated track record of delivering end-to-end full-stack software, collaborating in Agile environments, and debugging production-level REST services.

Freelance Software Development

Current / Ongoing
Freelance Full-Stack Developer & Consultant • Remote / Worldwide
Feb. 2026 – Present
  • Architecting and delivering tailored, production-ready full-stack web applications and MVPs for clients using Java, Spring Boot, React.js, and PostgreSQL.
  • Engineering high-throughput RESTful APIs and microservices, integrating third-party payment gateways, auth systems (JWT/OAuth), and cloud databases.
  • Designing responsive, modern, pixel-perfect user interfaces with React.js, Tailwind CSS, and Redux Toolkit prioritizing performance and accessibility.
  • Managing complete DevOps and deployment lifecycles using Docker containerization, Render, Vercel, and Neon PostgreSQL with automated CI/CD workflows.
  • Collaborating directly with clients and founders in agile sprints to translate specifications into high-impact software solutions on schedule.
Java Spring Boot React.js PostgreSQL REST APIs FastAPI Docker Tailwind CSS Postman Git / GitHub

Envision Computer Training Academy

Full-Stack Developer Intern • Pune, India
July 2025 – Feb. 2026
  • Developed responsive, scalable full-stack web applications utilizing Java, Spring Boot, React.js, and MySQL.
  • Built and integrated secure RESTful APIs ensuring smooth client-server communication and low-latency payload serialization.
  • Engineered robust persistence and business logic layers using Spring MVC, Hibernate, Spring Data JPA, and JDBC.
  • Leveraged Git and GitHub for collaborative code reviews, feature branching, and release versioning.
  • Executed comprehensive API validation using Postman and eliminated backend bottlenecks to boost application stability.
Java Spring Boot React.js Spring Data JPA Hibernate MySQL Postman Git / GitHub
Academic & Credentials

Education & Certifications

Solid foundational computer science education coupled with verified industry certifications in full-stack programming languages.

Apr. 2022 – Apr. 2025

Bachelor of Science in Information Technology

North Maharashtra University • Jalgaon, Maharashtra

CGPA: 8.6 / 10

Comprehensive curriculum focused on Data Structures, Database Management Systems (RDBMS), Operating Systems, Software Engineering Methodologies, and Network Protocols.

Data Structures & Algorithms RDBMS Computer Networks Software Engineering

Verified Engineering Certifications

Formal credentials demonstrating proficiency in software architecture, object-oriented programming, and backend engineering.

Full-Stack Java Development
Certified
Python Programming
Certified
C++ Programming
Certified
Freelance & Consulting

Have a Project in Mind? Let's Build It Together

Available for freelance web application development, custom MVP creation, and backend API engineering. From architecture to production deployment, I deliver fast, scalable, and resilient software tailored to your business goals.

Full-Stack Web Apps

End-to-end custom web applications built with modern React.js frontends and resilient Spring Boot / FastAPI backends, backed by PostgreSQL.

React Spring Boot PostgreSQL

Custom REST APIs & Microservices

High-throughput, secure RESTful API architectures, JWT/OAuth authentication, database optimization, and third-party SaaS integrations.

REST APIs JWT Microservices

MVP & Startup Rapid Builds

Turn your startup idea into a fully functional, testable MVP quickly with clean architecture, intuitive UI, and zero technical debt.

Fast Prototyping Modern UX Agile

Cloud Deployment & DevOps

Docker containerization, automated CI/CD setup, performance tuning, and cloud deployment on Render, Vercel, Netlify, or AWS.

Docker Cloud CI/CD
Rapid Delivery
Sprint-based progress & live previews
Clean Code
Production-grade & well documented
Direct Updates
WhatsApp, Slack & daily transparency
100% Handover
Full repo ownership & deployment guide
Available for New Projects

Let's Discuss Your Project Scope

Whether you need a full-stack web application, an API layer, or a custom MVP engineered from scratch, reach out directly for a rapid quote and architecture breakdown.

Chat on WhatsApp (Fastest Response) Email Project Scope
Free initial consultation: 15-minute call to scope requirements and recommend tech stack.
Milestone-based delivery: Pay progressively as verifiable deliverables are completed.
NDA friendly: Ready to sign Mutual Non-Disclosure Agreements for proprietary ideas.

Contact Me for Projects

Fill in your project brief below and I'll get back to you with an estimated timeline and proposal within 2–4 hours.

Let's Connect

Get In Touch & General Inquiries

Whether you're looking for full-time engineering talent, have a question, or want to discuss technical collaboration, my inbox is always open.

Nikhil Ingale

Nikhil Ingale

Full-Stack Java & React SDE
Ready for SDE Interviews & Hiring

Direct Communication Channels

Direct Email
nikhilingale966@gmail.com
Direct Phone / WhatsApp
+91 7588533293
Location
Pune, Maharashtra, India
Open to Relocate / Remote
LinkedIn GitHub

Send a Direct Message

guest@nikhil-dev: ~ (/dev/terminal)
Antigravity Engine v2.6.4 - Interactive Developer Shell
Type help to inspect commands or click chips below.
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