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I am a Senior Full-Stack Engineer with over eight years of experience designing, developing, and deploying high-performance SaaS platforms and enterprise systems across fintech, healthcare, AI, and e-commerce. I specialize in MERN, Ruby on Rails, Next.js, React, and Python (FastAPI), with deep expertise in API design, microservices, and cloud infrastructure (AWS, GCP). I enjoy integrating AI-powered features and automating complex workflows using OpenAI API, LangChain, and prompt engineering to scale products. I lead distributed teams, architect scalable architectures, and deliver production-ready software that aligns with business goals while improving user experience.…I am a Senior Full-Stack Engineer with over eight years of experience designing, developing, and deploying high-performance SaaS platforms and enterprise systems across fintech, healthcare, AI, and e-commerce. I specialize in MERN, Ruby on Rails, Next.js, React, and Python (FastAPI), with deep expertise in API design, microservices, and cloud infrastructure (AWS, GCP). I enjoy integrating AI-powered features and automating complex workflows using OpenAI API, LangChain, and prompt engineering to scale products. I lead distributed teams, architect scalable architectures, and deliver production-ready software that aligns with business goals while improving user experience.

Zaheer W.

Full Stack Developer, AI Engineer, Data Scientist, +2

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I am a Senior Full-Stack Engineer with over eight years of experience designing, developing, and deploying high-performance SaaS platforms and enterprise systems across fintech, healthcare, AI, and e-commerce. I specialize in MERN, Ruby on Rails, Next.js, React, and Python (FastAPI), with deep expertise in API design, microservices, and cloud infrastructure (AWS, GCP). I enjoy integrating AI-powered features and automating complex workflows using OpenAI API, LangChain, and prompt engineering to scale products. I lead distributed teams, architect scalable architectures, and deliver production-ready software that aligns with business goals while improving user experience.…I am a Senior Full-Stack Engineer with over eight years of experience designing, developing, and deploying high-performance SaaS platforms and enterprise systems across fintech, healthcare, AI, and e-commerce. I specialize in MERN, Ruby on Rails, Next.js, React, and Python (FastAPI), with deep expertise in API design, microservices, and cloud infrastructure (AWS, GCP). I enjoy integrating AI-powered features and automating complex workflows using OpenAI API, LangChain, and prompt engineering to scale products. I lead distributed teams, architect scalable architectures, and deliver production-ready software that aligns with business goals while improving user experience.

Available to hire

I am a Senior Full-Stack Engineer with over eight years of experience designing, developing, and deploying high-performance SaaS platforms and enterprise systems across fintech, healthcare, AI, and e-commerce. I specialize in MERN, Ruby on Rails, Next.js, React, and Python (FastAPI), with deep expertise in API design, microservices, and cloud infrastructure (AWS, GCP).

I enjoy integrating AI-powered features and automating complex workflows using OpenAI API, LangChain, and prompt engineering to scale products. I lead distributed teams, architect scalable architectures, and deliver production-ready software that aligns with business goals while improving user experience.

Skills

Experience Level

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Intermediate

Language

English

Fluent

Work Experience

Technical Lead / Senior Full Stack Developer at Cyber Nest LLC

March 1, 2022 - October 27, 2025

Directed full-cycle development for high-visibility SaaS platforms, implemented resilient CI/CD workflows, and optimized AWS/Docker infrastructure to ensure maximum scalability and zero-downtime deployment. Led cross-functional teams and owned delivery pipelines across the React/Node/MongoDB stack.

Senior Full Stack Developer / AVP at WeAre AVP

February 1, 2022 - February 1, 2022

Remote; Led full-cycle development and maintenance of scalable SaaS platforms for Event Staffing and Trinity Fix; established best practices for code quality and architecture; mentored junior/mid-level developers; improved delivery velocity.

Full Stack MERN Developer at Geek Chicago

August 1, 2020 - August 1, 2020

Remote; Developed full-stack web applications using React.js, Node.js, Express.js, and MongoDB; improved feature delivery speed and ensured seamless back-end–front-end integration; architected back-end logic and data models to support scalable growth.

Software Engineer at Fez Tech Solutions

April 1, 2018 - April 1, 2018

Remote; Developed RESTful APIs using Node.js and Express.js; improved data exchange efficiency between microservices and front-end systems; implemented robust back-end logic and microservice orchestration.

Senior Full-Stack Engineer / Team Lead at CyberNest

January 1, 2024 - Present

Led end-to-end development of an AI-driven SaaS platform using Next.js, Node.js, and LangChain, enabling scalable marketing automation and reducing content generation time by 45%. Architected scalable cloud infrastructure on AWS, implemented CI/CD pipelines, and mentored a cross-functional team of 6 engineers to improve delivery velocity by 30%.

Senior Software Engineer at Fanlist

January 1, 2023 - December 1, 2023

Led a distributed engineering team to build and maintain a podcast hosting SaaS using Rails, React.js, and GraphQL, serving thousands of creators globally. Implemented Stripe Connect for monetization, reducing payment processing time by 70% and automating payouts. Established CI/CD practices, improving release quality and platform reliability.

Software Engineer at iRobot

November 1, 2020 - December 1, 2022

Contributed to core development of iRobot's global e-commerce systems supporting Roomba and Braava product lines using Ruby on Rails and GraphQL. Developed a Salesforce API-powered pricing automation module, cutting manual data input time by 60% and improving pricing accuracy across 10+ product lines. Collaborated with international engineering and QA teams to streamline deployments, increasing release frequency and reducing latency through backend optimization and caching.

Software Engineer at Healthie

December 1, 2019 - September 1, 2021

Developed a HIPAA-compliant telehealth SaaS platform using Ruby on Rails and React, increasing provider-patient engagement by 50%. Mentored 3 junior developers in agile practices, code reviews, and scalable system design, improving codebase maintainability and developer efficiency. Integrated Stripe and PayPal payments, reducing failed transactions by 35% and ensuring PCI compliance. Optimized PostgreSQL queries and implemented Redis caching, improving API performance by 40% and uptime to 99.9%.