Sagar Jain

5.0

(46 reviews)

US$25.00

For every 15 mins

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ABOUT ME

Lead Software Engineer | Product Developer | Seasoned Interviewer

10 years of experience in Software development with a good understanding of Data Structures and Algorithms. Experienced in designing and developing large-scale distributed systems with Java, Spring, and Cloud technologies (Google Cloud Platform or Amazon web services).

I've worked at Amazon, PayPal, and JP Morgan Chase, gaining extensive experience in conducting coding, problem-solving, and system design interviews throughout my tenure at these companies globally.

I love to solve problems related to programming and explore open-sourced RESTful APIs. Apart from work, I have a good understanding of cybersecurity and have reported major bugs in Uber, Google, Ola, LinkedIn, and Amazon.

English

London (+00:00)

Joined October 2021

EXPERTISE

Java

10 years experience | 1 endorsement

Problem solving Competitive Programming Algorithm Data structure Coding Spring data Spring Security Spring Boot MySQL

AWS

6 years experience | 1 endorsement

Amazon EC2 Amazon S3 Cloud Hosting

Amazon EC2 Amazon S3 Cloud Hosting AWS Lambda Amazon

Spring Boot

8 years experience | 1 endorsement

RESTful API Hibernate ORM Spring Security

RESTful API Hibernate ORM Spring Security JPA Hibernate

Google Cloud Platform

4 years experience

Google apis Google Analytics Google Maps

System design

8 years experience | 3 endorsements

Event-Driven Architecture Webhooks Microservice architecture

Event-Driven Architecture Webhooks Microservice architecture CDN Scalability Apache Kafka HTTP Database

Interview Preparation

8 years experience

Problem solving Software architecture Negotiation Skills

Problem solving Software architecture Negotiation Skills Mock Interview Communications Interview Skills System design Coding LeetCode

Python

3 years experience

Flask Python 3 Python 2

Flask Python 3 Python 2 MongoDB Django

REVIEWS FROM CLIENTS

5.0

(46 reviews)

Simon

September 2024

He is an excellent teacher!!

Kareen Salameh

June 2024

Highly recommended!! did multiple 1:1 live sessions, and was very helpful (ethical hacking task) Such a great mentor!

Linyan Tian

April 2024

I'm a beginner and he really took time to make sure I understood the logic of the code and went line by line which I really appreciated

February 2024

Sagar is incredibly helpful, insightful, and imbues a level of expertise and professionalism that is rarely found. I look forward to continue working with him, and I would highly recommend Sagar for any data structures, algorithmic, LeetCode, or Java needs, in addition to any FAANG or FAANG adjacent career preparation!

Ritu Babu

February 2024

Sagar was incredibly helpful.He helped fix all the issues I had with my sscript and provided the right solution to my problem.Thank you Sagar

Amelie Astruc

February 2024

fixed ittt

Pete

February 2024

Great coach

Zach Miller

April 2023

Great thanks for help!

Justin Maguire

January 2023

Sagar did a great job helping with some authentication and db design issues that I ran into. Thank you Sagar!

Justin Maguire

December 2022

Sagar lended a hand with a deployment issue related to a Django application, and we discussed model relationships. He was a great help.

SOCIAL PRESENCE

GitHub

ethereum_node_running

dressme

HTML

Stack Overflow

1 Reputation

EMPLOYMENTS

Lead Software Engineer

JP Morgan Chase

2024-03-01-Present

Working on a green field project with a scale of millions of users. Architecting system designs, implement micro services and closely col...

Working on a green field project with a scale of millions of users. Architecting system designs, implement micro services and closely collaborating with Product to continuously improve user experience.

Java

Database

Docker

Java

Database

Docker

Google Cloud Platform

Spring Boot

Kubernetes

GraphQL

Senior Product Engineer - PE4

Intercom

2022-09-01-2024-03-01

Part of Growth and AI Group at Intercom. Working on increasing net new paid customers at Intercom. Integration with OpenAI GPT-4 APIs wit...

Part of Growth and AI Group at Intercom. Working on increasing net new paid customers at Intercom. Integration with OpenAI GPT-4 APIs within Intercom Messenger. Cardless trials at Intercom Increasing trial to paid conversion as part of Intercom Growth vision.Part of Growth and AI Group at Intercom. Working on increasing net new paid customers at Intercom. Integration with OpenAI GPT-4 APIs within Intercom Messenger. Cardless trials at Intercom Increasing trial to paid conversion as part of Intercom Growth vision.

Ruby on Rails

GitHub

Ember.js

Ruby on Rails

GitHub

Ember.js

AWS

Software Engineer III

PayPal

2020-05-01-2022-08-01

Deploying and Scaling the DALM service to the Cloud. The service extensively leverages Google Cloud Platform products like Google Big Que...

Deploying and Scaling the DALM service to the Cloud. The service extensively leverages Google Cloud Platform products like Google Big Query, Dataproc for Spark deployments, Google cloud storage, and Google PubSub.

Java

JPA

Spring Security

Java

JPA

Spring Security

Google Cloud Platform

Spring Boot

Google apis

PROJECTS

Kindle Personal Document ServiceView Project

Amazon

2016

Led and contributed to the design, development, testing, and deployment of Kindle Personal Document Services which is a set of ~ 19 micr...

Led and contributed to the design, development, testing, and deployment of Kindle Personal Document Services which is a set of ~ 19 microservices. Used Java, Python, Spring and Amazon Web Services like SQS, Lambda, and S3. Implemented rigorous testing processes to maintain code quality. Created and maintained comprehensive technical documentation. Adhered to security best practices in software development. Effectively communicated project status, issues, and resolutions to team members and management. Accountable for the quality and timely delivery of software solutions.

Java

MySQL

Spring Boot

Java

MySQL

Spring Boot

AWS Lambda

Hibernate ORM

AWS