Engineering Portfolio Full-Stack, AI & SaaS Systems
Portfolio Resume

Shah Zaib

Senior Full-Stack Engineer & AI Technologist

Explore. Build. Automate.
Available For 2026 Remote Projects

About Me

Senior Full-Stack Engineer and AI Technologist with 10+ years of experience designing, building, and scaling production-grade SaaS platforms, AI-powered products, and real-time collaboration systems. Specialized in Ruby on Rails, modern JavaScript, Hotwire/Turbo, Stimulus, Vue, React, and LLM-based solutions using OpenAI and cloud AI services. Comfortable owning end-to-end delivery from architecture and data modeling to frontend UX, DevOps, observability, and measurable business impact.

Engineering Focus Areas

01

AI Product Engineering

LLM apps, prompt workflows, transcription, image/video processing, semantic search, and document parsing.

02

Ruby on Rails SaaS

Secure, scalable Rails systems with billing, auth, dashboards, admin tools, and production operations.

03

Real-Time Platforms

Action Cable, WebSockets, notifications, collaboration, messaging, scheduling, and live user experiences.

04

Cloud & DevOps

Docker, AWS, DigitalOcean, CI/CD, Nginx, Kamal, Capistrano, monitoring, and deployment pipelines.

10+ Years Production experience
Architecture End-to-end ownership
AI Delivery OpenAI, GCP, AWS
Secure Apps Auth, SSL, OWASP
Performance Scalable workflows
Remote Ready Client collaboration

Core Stack

Rails | JS | AI

Ruby, Rails 7/8, Hotwire, Vue, React, Node, Python, SQL, PostgreSQL, Redis.

Delivery Strengths

System Design
API Design
Billing
Observability
Mentoring

Languages

EN | UR | HI

English fluent, Urdu native, Hindi and Punjabi.

Experience

Freelance Senior Full-Stack Engineer

2021 - Present
Self-EmployedKarachi, Pakistan (Remote)
  • Design, build, and maintain full-stack SaaS products and internal tools for clients in education, healthcare, media, and sports.
  • Deliver AI-powered features for text, image, speech, and video processing using OpenAI, Google Cloud, AWS AI services, and custom pipelines.
  • Own end-to-end development: architecture, data modeling, backend APIs, frontend UX, DevOps, and observability.
  • Implement real-time collaboration, notification systems, subscription billing, and integrations with third-party APIs.

Senior Ruby on Rails Developer

Nov 2019 - Nov 2020
Cooperative ComputingKarachi, Pakistan
  • Developed and maintained scalable, secure Rails applications with modern frontends, focusing on performance and reliability.
  • Integrated third-party APIs for payments, auth, and communication to streamline workflows and enhance product capabilities.
  • Collaborated with cross-functional teams and mentored junior developers on Rails, JavaScript, and testing best practices.

Full-Stack Ruby on Rails Engineer

Jan 2016 - Oct 2019
Daewoo Pakistan Express Bus ServiceLahore, Pakistan
  • Led development of online booking and cab systems, helping modernize Daewoo's digital customer experience.
  • Implemented backend services, seat reservation logic, and payment flows using Ruby on Rails and PostgreSQL.
  • Collaborated with operations and business teams to translate requirements into scalable technical solutions.

Ruby on Rails Developer

Jan 2014 - Dec 2015
IntensityLabsLahore, Pakistan
  • Built and optimized web applications for international clients with clean architecture and maintainable code.
  • Worked across the stack on features, bug fixes, performance improvements, and frontend integrations.

SEO Team Lead

Oct 2011 - Dec 2013
EGlobalSolutionLahore, Pakistan
  • Led SEO strategy and execution, collaborating with development teams on SEO-friendly architecture and content structures.
  • Gained strong understanding of analytics, funnels, and acquisition that informs product and engineering decisions.

Featured Projects

Person.care

2025 - Present

Online counseling and health coaching platform providing intervention programs, virtual sessions, secure messaging, scheduling, and AI-assisted tooling for therapists and clients.

Rails 8PostgreSQLStripeTwilioOpenAIAWS ECS

Intellecta.app

2024 - Present

AI-driven educational platform with lesson plan generation, worksheet creation, MCQ assessment builder, math solver, IELTS modules, multimedia processing, and cloud-native deployment.

RailsHotwireOpenAIGoogle CloudHugging FaceDocker

DB Designer

2019 - Present

Full-stack database schema design and modeling platform with real-time collaboration, multi-database support, teams, subscription billing, and import/export workflows.

RailsVue 3TypeScriptActionCableStripePlaywright

Tendable

2025

Quality and compliance tools for health and care professionals, focused on reducing admin overhead and enabling real-time care quality assurance.

RailsCompliancePerformanceCare Tech

MySportsbook

2023 - 2024

Africa's sports networking platform connecting fans with athletes, coaches, and federations through skill videos, scouting opportunities, and real-time engagement.

MediaVideoNetworkingRealtime

Joburg Post

2023 - 2024

Digital newsroom connecting the pan-African voice through news, opinions, multimedia content, scalable publishing workflows, and content operations.

CMSPublishingMultimediaNewsroom

ChatToAPotato

2021 - 2023

Mental health web app connecting users with counselors through an anonymous friendly avatar chat experience, secure messaging, and counselor dashboards.

Mental HealthMessagingDashboardsSecurity

DaewooCab

2016 - 2019

Pakistan cab service platform with web and mobile interfaces for booking, fleet management, real-time tracking, routing, and location-aware booking.

RailsPostgreSQLMaps APINginx

Skills

Programming

  • Ruby
  • JavaScript ES6+
  • TypeScript
  • Python
  • SQL

Frameworks & Platforms

  • Ruby on Rails 7/8
  • Hotwire
  • Turbo
  • Stimulus
  • React
  • Vue.js 3
  • Node.js

AI & ML Integrations

  • LLM Apps
  • Prompt Engineering
  • Text/Image/Video Processing
  • Speech Recognition
  • Embeddings
  • Text-to-SQL
  • OpenAI
  • Hugging Face

Cloud & DevOps

  • AWS ECS/ECR/S3
  • ElastiCache
  • DigitalOcean
  • Docker
  • GitHub Actions
  • Nginx
  • Kamal
  • Capistrano

Data & Storage

  • PostgreSQL
  • MySQL
  • MongoDB
  • Redis
  • Active Storage
  • S3

Realtime & Integrations

  • Action Cable
  • WebSockets
  • FCM
  • Stripe
  • Twilio
  • Google APIs
  • Webhooks
  • API Design

Education & Interests

Bachelor of Science in Information Technology

Virtual University of Pakistan

Interests

AI Research and Applied ML, gaming, animation and storytelling, and badminton.