My skills
Ruby on Rails
Ruby
React
Javascript
Python
FastAPI
Zamir Manihar
Senior Fullstack Engineer
Turning Complex Business Problems into Scalable Products
About me
Senior Fullstack Engineer with 6+ years of experience building and scaling high-traffic, global products across SaaS, e-commerce, and ESG domains. I specialize in Python, FastAPI, Ruby on Rails and React, designing performant and reliable systems on AWS and Heroku.
I’ve led initiatives that improved application performance by 40–50%, mentored engineers, and collaborated with distributed teams to deliver scalable, production-grade solutions.
Experience
- Leading end-to-end development of large-scale Python (FastAPI), Ruby on Rails applications, from system design to production deployment.
- Optimized database queries and implemented Redis-based caching strategies, reducing page load times by ~40%.
- Championed TDD with RSpec, increasing test coverage from ~65% to ~90% and reducing production incidents.
- Engineered CI/CD pipelines using Docker and AWS, enabling automated deployments and improving delivery speed.
- Collaborating with client stakeholders in an Agile environment to translate complex business requirements into scalable solutions.
PythonFastAPIRuby on RailsReact.jsPostgreSQLRedisAWSDockerRSpecCI/CD
- Developed and shipped features for production Ruby on Rails applications serving thousands of active users.
- Wrote and maintained unit and integration tests to improve software reliability and user experience.
- Troubleshot and resolved software defects, improving application stability and performance.
- Actively participated in Agile ceremonies and contributed to continuous improvement of development processes.
Ruby on RailsPostgreSQLMinitestAgile/Scrum
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zamir@root: technical-skills$ . ls
Technical Skills
Python 
FastAPI 
Ruby 
Ruby on Rails 
React 
Javascript 
TypeScript Python FastAPI Ruby Ruby on Rails React Javascript TypeScript PostgreSQL 
MySQL Redis AWS Heroku Git CI/CD Elasticsearch PostgreSQL MySQL Redis AWS Heroku Git CI/CD Elasticsearch
MySQL Redis AWS Heroku Git CI/CD Elasticsearch PostgreSQL MySQL Redis AWS Heroku Git CI/CD Elasticsearch Projects
BrokerKit
A SaaS platform that helps real estate brokerages streamline agent recruitment, onboarding, and retention through automation and analytics.
Stadium Goods
A high-volume, multi-sided marketplace (acquired by Farfetch) for authentic sneakers and apparel, requiring robust search, inventory, and transaction systems.
Scope5
A data-driven SaaS solution enabling enterprises to measure, track, and reduce their environmental footprint through comprehensive ESG reporting.