Hirenkumar Patel

5.0

(4 reviews)

US$15.00

For every 15 mins

Sessions/Jobs

ABOUT ME

Senior/Lead/Architect Java Web Developer

Experienced Senior Backend Engineer with 10+ years of experience in Java (Spring Boot) and 5+ years in Python AI/ML systems, delivering production-grade APIs, microservices, and LLM integrations. Specializes in FastAPI, LangChain, OpenAI, and vector database pipelines. Strong background in building secure, scalable platforms that integrate AI models, handle real-time data processing, and serve global users.

Hindi, English

Mumbai (+05:30)

Joined August 2019

EXPERTISE

5 years experience

5 years experience

5 years experience

3 years experience

3 years experience

3 years experience

4 years experience

REVIEWS FROM CLIENTS

5.0

(4 reviews)

Nadav Stern

June 2022

Hirenkumar is a nice guy it was a pleasure to talk with him

Removed User

April 2022

Very nice personality, hard working, good explanations.

Frank Wiebeler

April 2022

Really fast and helpful

Atibhi Agrawal

March 2022

Very knowledgable in Java and clearly and patiently cleared doubts.

SOCIAL PRESENCE

GitHub

Coursera_Capstone1

chatbot-api

Java

Stack Overflow

1 Reputation

EMPLOYMENTS

Senior/Principal Java + AI/ML Backend Engineer

Independent Consultant

2019-09-01-Present

Built a Python FastAPI backend to proxy requests to an OpenAI-powered image generator.
Integrated Stripe subscrip...

Built a Python FastAPI backend to proxy requests to an OpenAI-powered image generator.
Integrated Stripe subscriptions, user credit limits, and AWS S3 signed URLs.
Used LangChain for prompt chaining + Pinecone for storing vector metadata.
Designed a LangChain agent architecture to handle queries across documents, APIs, and vision models.
Developed backend using FastAPI + Redis + Celery for async task routing.
Integrated with OpenAI + Hugging Face APIs and deployed to AWS Fargate.
Optimized REST APIs, improved GC tuning, and reduced API response time by 40%.
Integrated Kafka + PostgreSQL + Redis for a high-throughput financial app.

Java

API

Migration

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Java

API

Migration

Spring Boot

Design Architecture

Deployment automation

Data Integration

FinTech

Cross-functional collaboration

Techno-Functional

Software architecture

Generative AI

SaaS

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Technical Lead

CIGNEX Datamatics

2016-01-01-2019-08-01

• Worked with the team of Business Analysts and Subject Matter Experts in understanding them Requirements and draft the System Requiremen...

• Worked with the team of Business Analysts and Subject Matter Experts in understanding them Requirements and draft the System Requirement Specification. • Worked as developer in understanding the requirements and finalizing the technology products and components to be used for the implementation. • Worked as Lead to design the architecture based on Java/Spring Boot based technologies for the Web based Application. • Worked on coding the Spring Cloud, JPA Model and Repository, Application base services, Filters, DTO and controllers. • Implementing to Consider Test driven development, Logging - Multiple Levels, Error Handling, Job Crashes / Timeouts - Graceful Recovery, Transaction Management. • Using Code quality tools (Sonar, Jenkin). • Handling/Mentoring multiple Junior/ Senior Developers.

Spring mockmvc

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Spring mockmvc

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Senior Consultant

CIGNEX Datamatics

2012-01-01-2015-12-01

• Design and Development of all tiers in the web application using J2EE standards • Participating in business meetings for requirement ga...

• Design and Development of all tiers in the web application using J2EE standards • Participating in business meetings for requirement gathering and provide technical guidance for the product management team • Created a solid, reusable MVC framework based on Spring

Spring mockmvc

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Spring mockmvc

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PROJECTS

ETS (US based Fintech client)

2020

This is connector developed for Banking APIs product for US based fintech. Connector with mobile bank to core banking APIs with functiona...

This is connector developed for Banking APIs product for US based fintech. Connector with mobile bank to core banking APIs with functionality are trade management, payment, withdrawals and verify transaction. Responsibilities: • Worked as a Lead Developer as design, code, debugging, algorithm and handle small team and client team. • Worked as architect in understanding the requirements and finalizing the technology products • Backend service Development on Java, Microservices with Spring Boot based technologies and integration. • Worked on coding the Repository, Application base services, Filters, DTO and controllers. • Using Code quality tools bitbucket and Azure. • Handling/Mentoring multiple Junior/ Senior Developers.

Python

Java

JSON

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Python

Java

JSON

Docker

Spring Boot

Kubernetes

Microservices

RESTful API

OpenAI

Angular 6

Generative AI

LLM

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Sahaj Portal

2020

This is web based an application product for our India entrepreneur in small village. The screening process government and non-government...

This is web based an application product for our India entrepreneur in small village. The screening process government and non-government. Govt services as like pan TDS in India and electricity bill payment for some states. Non-government services are insurance, e-learning, etc. Currently, we are working on IRCTC services for Sahaj Portal. Responsibilities: • Worked as architect in understanding the requirements and finalizing the technology products and components to be used for the implementation. • Worked as a Leader to handle small team and client team. • Development on Java/Spring Boot based technologies for the Web based Application. • Worked on coding the Repository, Application base services, Filters, DTO and controllers. • Using Code quality tools bitbucket and JIRA for managing tasks. • Third Party Integration with IRCTC, PAN, Utility bills. • Handling/Mentoring multiple Junior/ Senior Developers.

Java

JSON

JPA

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Java

JSON

JPA

Spring data

Web Development

Docker

Spring Boot

Microservices

Spring Cloud

RESTful API

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