Open to opportunities

Arish Khan User

@arishkhandev

Message

Senior full-stack developer building scalable SaaS and AI/ML features with MERN and Python for 40%+ performance gains.

Pakistan

Message

What I'm looking for

I’m looking for a remote-friendly role where I can architect scalable SaaS systems, ship MERN/Python features, and apply LLM/RAG to automate workflows—focused on measurable performance, reliability, and clean system design.

I’m a Senior Full Stack Developer with 7+ years of experience architecting and scaling SaaS platforms and high-performance web applications. I specialize in the MERN stack, and I use strong Python expertise to integrate AI/ML capabilities into real products.

I’ve delivered end-to-end solutions with measurable impact—improving application performance by 40%+ and supporting datasets of 100,000+ records. I’m especially focused on system design, cloud-native microservices, and building scalable, reliable backend services.

My work spans AI/ML feature development like LLM integrations, RAG pipelines, and workflow automation, including building server-driven architectures that enable dynamic agent deployment without frontend redeployments. I also have hands-on experience with data visualization and API-driven product integrations.

I’m recognized for consistent delivery, earning Top-Rated Plus status on Upwork (Top 3%). I hold a Master’s degree in Computer Science (AI & Bioinformatics), and I bring a detail-oriented, engineering-first mindset to every build.

Experience

Work history, roles, and key accomplishments

Current

Freelance Full Stack & AI/ML

Current

Upwork

Jan 2018 - Present (8 years 5 months)

Delivered end-to-end SaaS solutions using Python, React, Node.js, and cloud infrastructure, including LLM integrations, RAG pipelines, and workflow automation. Built REST/GraphQL APIs for 100k+ records and improved performance by 40%+, achieving Upwork Top Rated Plus status (top 3%).

Python React Node LLM Integrations Microservices GraphQL APIs Cloud Infrastructure Performance Optimization CI CD

Full Stack & AI/ML Developer

Afiniti

Jan 2024 - Jan 2025 (1 year)

Architected AI-driven SaaS applications using Python, LLMs, RAG, and cloud-native microservices. Built real-time and batch data pipelines, integrated AI into existing platforms to improve automation and decision-making, and partnered with product/engineering on system design and AI adoption strategies.

Python LLM RAG Cloud Native Data Pipelines AI Integration System Design API Development Workflow Automation

Senior Full Stack Developer

Threecolts

Jan 2022 - Jan 2023 (1 year)

Led development of scalable SaaS features using React, Python, Node.js, and AWS/GCP. Designed microservices architecture and CI/CD pipelines, optimized backend services for performance/reliability/scalability, and mentored junior developers through code reviews.

React Python Node.Js Development AWS GCP Microservices Architecture CI CD Pipelines Scalability Code Review

Full Stack Developer

Outspot

Jan 2021 - Jan 2022 (1 year)

Developed and maintained full-stack web applications using React, Node.js, and PostgreSQL. Implemented RESTful APIs for analytics and third-party integrations, improved system performance and reliability through refactoring/optimization, and delivered product features with cross-functional teams.

React Node PostgreSQL RESTful APIs Backend Services Third Party Integrations Performance Optimization Refactoring Reliability Engineering Cross Functional Collaboration

Junior Software Developer

FlutterDesk

Jan 2019 - Jan 2020 (1 year)

Assisted in frontend and backend development using JavaScript, PHP, and SQL. Built internal tools and dashboards, debugged/tested/maintained production applications, and worked closely with senior developers on best practices for system design and deployment.