Adnan Mustafa - Senior Software Engineer

Lahore, Pakistan

Experience

Oct 2025 - Present

4 months

Remote, United States

Senior Software Engineer

Toptal

Lead end-to-end Ruby on Rails development and application engineering, delivering scalable, secure, and high-performance web applications.
Collaborate with clients and stakeholders to gather business and technical requirements, ensuring tailored and innovative solutions.
Design and implement full-stack architectures using Ruby on Rails on the backend, modern frontend frameworks such as React.js, and relational databases like PostgreSQL/MySQL for robustness and scalability.
Provide technical leadership and mentorship, enforcing best practices including MVC architecture, TDD/BDD, and clean code principles.
Manage and optimize cloud deployments on AWS, Heroku, and Digital Ocean with a focus on performance, security, and high availability, while implementing CI/CD pipelines, containerization with Docker, and orchestration with Kubernetes.
Optimize application performance through efficient Active Record queries, caching strategies, and background job processing with Sidekiq/Resque.
Integrate third-party services and APIs to deliver responsive, user-centric solutions.
Actively mentor junior engineers within Agile/Scrum environments.

Aug 2022 - Aug 2025

3 years 1 month

Remote, United States

Senior Software Engineer

DMI

Manage end-to-end Ruby on Rails development and application engineering processes to deliver scalable, secure, and high performing web applications.
Collaborate with clients and stakeholders to gather business and technical requirements, ensuring the delivery of tailored and innovative solutions.
Design and implement full-stack architectures, leveraging Ruby on Rails on the backend, modern frontend frameworks such as React.js, and relational databases like PostgreSQL/MySQL for robustness and scalability.
Provide technical leadership and mentorship, enforcing best practices including MVC architecture, TDD/BDD, and clean code principles.
Administer and optimize cloud deployments on AWS, Heroku, and Digital Ocean, focusing on performance, security, and high availability.
Implement CI/CD pipelines, containerization with Docker, and orchestration with Kubernetes to streamline development and deployment workflows.
Optimize application performance through efficient Active Record queries, caching strategies, and background job processing with Sidekiq/Resque.
Integrate third-party services, APIs, and modern web technologies to deliver responsive, user-centric solutions.
Actively mentor junior engineers and contribute to continuous improvement within Agile/Scrum environments.

Jun 2016 - Jul 2022

6 years 2 months

Software Engineer

CHIIRP

Built the initial full-stack architecture using Ruby on Rails as the core backend framework, creating a scalable and maintainable codebase from the ground up.
Led the development of e-commerce platforms by delivering responsive frontends with React.js and high-performance backend services with Rails, while ensuring seamless integration across the stack.
Optimized applications for user engagement through performance tuning, database optimization, and third-party API integrations.
Applied best practices in testing, CI/CD, and code quality.
Collaborated with cross-functional teams to align technical solutions with business needs.
Mentored junior developers to support product growth and innovation.

Remote

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Assemble Tech stacks

Helped create a collaborative workspace platform tailored for remote teams.
Built intuitive user interfaces and implemented seamless communication features, facilitating efficient collaboration among team members.

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Cancelo.io

Played a key role in creating a subscription management platform.
Built efficient backend systems and intuitive user interfaces, enabling users to easily manage their subscriptions and payments.

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Event Staffing

Contributed to building a platform for connecting event organizers with staff.
Designed intuitive user interfaces and implemented efficient backend systems, facilitating seamless coordination for events.

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Flote

Played a pivotal role in leading the development efforts for Zen tap, a marketing automation platform designed to streamline digital marketing workflows.
Collaborated with cross-functional teams to implement innovative features and integrations, empowering businesses to enhance their marketing strategies and drive growth.

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Go Outfitter

Contributed to the development of Go Outfitter, an online marketplace for outdoor enthusiasts.
Collaborated with the team to create a user-friendly platform with intuitive navigation and secure payment processing, enhancing the outdoor shopping experience for customers.

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Traded

Contributed to the development of Traded, a platform designed to streamline the trading process for users.
Collaborated with the team to implement robust backend solutions and intuitive user interfaces, ensuring a seamless trading experience for investors.

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Upcomingevents

Led the development efforts for the Event Staffing website.
Managed all aspects of the project using agile methodologies to oversee the software development lifecycle from inception to deployment.
Collaborated closely with cross-functional teams to gather requirements, design intuitive user interfaces, and implement robust backend solutions.

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Zentap

Played a pivotal role in leading the development efforts for Zentap, a marketing automation platform designed to streamline digital marketing workflows.
Collaborated with cross-functional teams to implement innovative features and integrations, empowering businesses to enhance their marketing strategies and drive growth.

Summary

Senior Software Engineer with over 9 years of experience in Ruby on Rails and modern web development, specializing in building scalable, high-performance applications. Expertise includes designing and implementing robust system architectures, developing RESTful APIs, and integrating real-time features. Proficient in working with both relational (PostgreSQL, MySQL) and NoSQL databases, while seamlessly incorporating frontend frameworks to deliver full-stack solutions. Strong background in agile methodologies, CI/CD pipelines, Git, DevOps practices, and cloud platforms such as AWS, Heroku, and Docker. Recognized as a proactive collaborator and mentor, dedicated to clean, test-driven code, technical excellence, and driving successful product outcomes.

Skills

Core Competencies

Full-stack Development
Quality Assurance & Control
System Integration & Migration
Web & Mobile Platforms Design
Team Training & Leadership
Requirement Gathering & Analysis
Scalable Systems Architecture
Stakeholder Management
Innovative Technology Solutions
Software Development Life Cycle
Project Planning & Execution
Continuous Process Improvement
Database Development & Management
Code Review & Optimization
Test-driven Development (Tdd)
Troubleshooting & Issue Resolution
Task & System Automation
Cross-team Collaboration

Technical Proficiencies

Languages: Ruby, Javascript (React.js, React Native, Jquery, Typescript)
Frameworks: Ruby On Rails, Rspec, Node.js, Express.js
Web Technologies: Html5, Css3, Restful Apis, Graphql, Ajax, Web Sockets
Devops & Cloud: Jenkins, Docker Kubernetes, Aws, Azure
Databases: Postgresql, Mysql, Mongodb, Sqlite
Version Control: Git, Github, Gitlab
Others: Micro Services Architecture, Mvc, Tdd/bdd, And Agile/scrum

Languages

Urdu

Advanced

English

Elementary

Education

Oct 2010 - Jun 2014

Punjab University

Bachelor of Information Technology · Information Technology · Lahore, Pakistan

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Summary

Skills

Languages

Education

Punjab University

Bachelor of Information Technology · Information Technology · Lahore, Pakistan

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