Resume

# Amitava Ghosh

amitava.dev@proton.me | @ikouchiha47 | linkedin.com/in/amitavaag

Bangalore, India

PROFESSIONAL SUMMARY

I am mostly a platform engineer, building backend systems and a bit of frontend, for around 6 years. I have worked successfully across multiple tech stacks. I have a very good understanding of event based systems. I like to experiment with new technologies.

I work best as an Individual Contributor, but I have always worked in tandem with team members, learning and helping others.

I am looking for opportunities to work on scalable systems with good team members to learn and contribute.

For work I have a strong passion for reducing stress on people and systems.

 

  • Experienced in code reviews, deployment planning, and building metric monitoring systems and performance enhancement.
  • Delivering scalable software which are easy to contribute to, have an ecosystem around them for better integration and obviously create less chances of introducing bugs

 

SKILLS

  • Languages: Golang, Python, Javascript, Bash, Rails, Lua. etc (anything except Java)
  • MQ: Kafka, SQS
  • Storage: Mysql, Redis, Postgresql, DynamoDB
  • AWS, Terraform, Kong(nginx), Docker, Unix & Networking Tools.
  • Some knowledge of kubernetes
  • Api design, Api security, System Design.

i like learning new languages

 

WORK EXPERIENCE

 

Sequoia Consulting - Bangalore, India 2020-2023

Mostly worked on platform enginnering, architecting systems, building tools and libraries. Determining performance bottleneck, by benchmarking and profiling and

 

Senior Software Engineer

  • Engineering notification system, building and maintaining sdk for golang services, url shortners for encrypting and decrypting resource urls
  • Understanding requirements, designing solutions and preparing design docs.
  • Building cli tools to generate language specific deployment files, structured logging, request tracing across services and integration metric monitoring
  • Solving Solving production and performance issues like slow queries, db locks causing slow logins.
  • Improve overall application performance. Also co-ordinated to solve SSO login issues for clients and improve company docs.
  • Planning data and api migration, deployment, encryption and decryption of client files, deletion of requested resource. DB resolver to choose the proper db connection for read and write queries.
  • Come up with a new approach to writing APIs and generating documentation faster, leveraging protos and grpc gateway, helping with generating proper versioned models across languages and services.
  • Writing RCAs, using AWS insights, cloudwatch logs, golang perf testing tools for debugging. Generating documentation and code using protos. Introducing simple YAML based DSLs to avoid repetitive work and standarisation.
  • Worked on improving user data sync from CRMs using airflow and MWAA API based triggers, reducing the sync rate to reduce load on system.
  • Worked with devops and devs to introduce redis cache and solving connection issue between redis and server in AWS, improving login time.
  • Worked on other smaller services, like insurance and doctor aggregator using GraphQL, building Oauth2 like authentication system with permission grant and ABAC capabilites. (RBAC on API routes)
  • Solved and helped other teams to migrate client’s file to encrypted storage and planned a backward compatible release
    • As a part of the above step, also build a url shortner service to server encrypted files and figure cache invalidation policy
    • Build executable to be used by other languages due to a limitation of AWS library, and helped others integrate it
    • Collaborated with the front-end teams to fixed CORS headers and helped with the file downlaod with proper name
  • Developed a robust metric monitoring system from scratch using Golang and Redis as the data store, It did help us resolve an issue with notification service in proper time limit.

 

SDE-II

  • Lead code reviews and orchestrate deployments for multiple services in the platform team.
  • Build and maintain notification service to deliver emails and push. It helped track delievery, prevent re-delivery.
  • Analyzing and imporving db queries and system architecture to prevent db lockup along with datadog APM integration
  • Built a CSV manager to handle upload of multiple types of user info. Benchmarking APIs and functions
  • Build and maintain the golang sdk for the organisation
  • Establish proper logging practices,introduced tracing api calls and time taken. This helped debug slow user logins due to problems in other system.
  • Worked with Devops on fixing server-redis connection problems using strace. This eventually would enable people to use redis and cache user info.
  • Integrating logs using opensearch and a makeshift tracing library to trace api calls across services
  • Introducing migration standards and instrumentaion of existing codebases
  • Introduced caching and removing cross db connection and other fixing other problems with system design
  • Added support to logging library to handle PII data scrambling.

 

Gojek - Bangalore, India 2016 - 2020

Worked across more than 5 projects.

  • Go-fresh , a platform for merchants and outlets to buy and sell raw materials
  • Mart, a marketplace to order products from malls in Indonesia
  • Global Search, to search across three major sub-apps of Gojek
  • Gatekeeper, for authorization and authentication of requests
  • Customer Owner, Authentication & OTP service , for one-stop authentication of customers, drivers, and merchants. And sending OTP to users.

 

Work Involved

  • Centralizing authentication system for customer, driver and merchant auth.
  • Splitting into multiple microservices to handle OTP and Notifications
  • Adding rate limiters that helped in reduction of frauds against customers.
  • Building notification systems and integrating with multiple providers, reducing organizational costs.
  • Setting up kong (API Gateway) for the entire Gojek for authentication of requests beforehand
  • Coordinating with teams to centralize the service, to decentralize maintenance and enabling easy security review.
  • Analyzing TCP dumps for properly configuring timeouts and keepalives, for the above, and establishing a template for configuration of apis for the same.

  • Optimizing' API for CSV upload and record creation with 4 million records every 3-4 hours.

  • Using Kafka to handle handle populate various topics, on product updates, which would then be pushed to elastic search, to enable global search across the platform.
  • Using caching to speed up systems and reduce database loads.
  • Building UI to upload static data for product search
  • Setting up metrics and alerting for better visibility of systems and their failures

Personal Projects:

  • Building a slack bot for getting OTP, language translation, getting IP address of boxes.
  • Building a unified meta CLI tool for, which involved box creation.

Also, have been in War Rooms , during production issues, splitting requests at Haproxy, helping others debugging issues, warming up Redis cache etc.

 

Leftshift - Pune, India 08/2016 - 09/2016

Worked in 1 project.

  • Sequoia::Hack , an app for Sequoia Capital's hackathon

This company was later acquired by Gojek

 

Work Involved

  • Writing tests with mocha and jasmine runner for the backend

 

Kreeti Technologies - Kolkata , India 2014-2016

Worked across 4 projects.

  • Memento, a social networking app
  • SMarketplace, a marketplace for Retailers and CPG's for hosting promotions and selling products
  • Merayog , a matrimony platform

 

Work Involved

  • Setup of the entire application stack of memento, database design, frontend tool selection and automation
  • Implementation of login and account creation for CPG and Retailer, authentication, and authorization.
  • Photo upload using s3 and ImageMagick for image formatting
  • Implementing a commenting feature on the promotions page for communication between multiple parties
  • Email-based weekly and daily reminder of promotions
  • Rebuilding the internal payslip generation internal application in a different language stack

 

EDUCATION

Bachelors in Electronics and Communication. 2010-2014

Dr. Sudhir Chandra Sur Degree Engineering College, West Bengal, India

 

Personal Projects

 

  • A simple chat application to show users who joined the LeftShift network using id/pass. Users could share files and texts. Messages were sent via TCP and user join and left events were done using UDP custom format.
  • Other stuff @amitavaghosh1 go-gorm/dbresolver
  • StackOverflow: https://stackoverflow.com/users/1503615/argentum47