Open to opportunities

Mustafa Khan

@mustafakhan5

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Senior Full-Stack Software Engineer specializing in Ruby on Rails and React, delivering scalable web solutions.

United States

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What I'm looking for

I seek senior engineering roles where I can lead backend and full-stack projects, mentor teams, work with Rails/React, and deliver scalable, well-tested systems.

I am a Senior Full-Stack Software Engineer with 10 years of experience building scalable web applications using Ruby on Rails and React. I design robust backend systems, craft dynamic front-end experiences, and apply DevOps best practices for reliable deployments on platforms like Heroku and AWS.

I have led teams and projects end-to-end, owning backend roadmaps, improving system performance, and implementing features that increase user engagement and satisfaction. I emphasize code quality through testing (RSpec), CI/CD, and architectural decisions that reduce technical debt.

My background includes integrating payment and messaging services (Stripe, Braintree, Twilio), optimizing databases (PostgreSQL, Redis, MongoDB), and mentoring junior engineers to deliver high-impact, timely results.

Experience

Work history, roles, and key accomplishments

Current

Senior Software Engineer

Current

Instacart

Jan 2025 - Present (1 year)

Designed, developed, and maintained backend applications to improve performance and scalability; launched features that increased customer engagement and owned major product components while enforcing unit testing and reducing technical debt.

Ruby on Rails API Design PostgreSQL AWS RSpec Docker CI CD Performance Optimization

Senior Ruby on Rails Engineer

Ameren

May 2020 - Dec 2024 (4 years 7 months)

Led Ruby on Rails projects and a development team to deliver high-profile initiatives on time and within budget, improving system performance, front-end architecture, and deployment pipelines while enforcing testing and code-quality practices.

Ruby on Rails Team Leadership RSpec CI CD Deployment Performance Tuning Agile

Ruby on Rails Engineer

Dorman Products

Jan 2018 - Apr 2020 (2 years 3 months)

Architected and maintained SaaS platforms and single-page applications, integrated payment and SMS services (Stripe, PayPal, Twilio), and deployed projects using Pantheon, Heroku, and AWS to accelerate delivery.

Ruby on Rails React Stripe Twilio Heroku AWS API Development

RoR Backend Engineer

Ceridian

Oct 2016 - Dec 2017 (1 year 2 months)

Developed service-oriented web applications using Ruby on Rails and React under Agile methodology, improved application efficiency via query optimization and caching, and deployed to Heroku with CI workflows.

Ruby on Rails React Heroku AJAX JSON Caching Git Continuous Integration

Web Developer

Mealsuite Iwasa

Jun 2015 - Sep 2016 (1 year 3 months)

Implemented responsive ReactJS user interfaces and designed PostgreSQL schemas to support efficient data storage and collaboration with product, design, and QA teams for foodservice software.

ReactJS HTML5 CSS3 PostgreSQL Responsive Design Cross Functional Collaboration

Software Engineer

Demand Sphere

Apr 2014 - May 2015 (1 year 1 month)

Participated across the software development lifecycle building Rails backends and front-ends, authored migrations and ActiveRecord models, and maintained code quality via unit tests and code reviews.