Muhammad Anees Yasin
Verified Expert in Engineering
Full-stack Engineer and Developer
Lahore, Punjab, Pakistan
Toptal member since April 1, 2026
Anees is a senior full-stack web and mobile engineer with 6+ years of experience building production apps across fitness, healthcare, HR tech, and fintech. Specializing in React, Nest.js, Node.js, TypeScript, and modern full-stack technologies, he has shipped App Store and Play Store apps, built HIPAA-compliant back ends, and integrated AI solutions using OpenAI and LangChain. Anees thinks like a product owner, proactively identifying trade-offs, communicating clearly, and fully owning features.
Portfolio
Experience
- React - 5 years
- Node.js - 5 years
- TypeScript - 5 years
- NestJS - 4 years
- React Native / Expo - 3 years
- WebSockets - 2 years
- GraphQL - 2 years
- RabbitMQ - 2 years
Preferred Environment
GitHub, Jira, Figma, Slack, Zoom, Amazon Web Services (AWS), LangSmith, App Store Connect, Google Play Console
The most amazing...
...solution I've built is an AI-powered recommendation engine that personalizes workouts and meal plans, which I architected from the ground up for a fitness app.
Work Experience
Senior Full-stack Developer
CodingCops
- Drove the end-to-end development of an AI-powered fitness application, using OpenAI and LangChain to create a solution for delivering personalized workout and meal plans.
- Architected scalable REST APIs using Node.js and PostgreSQL with Prisma, improving system performance and maintainability.
- Developed cross-platform mobile applications using React Native (Expo), ensuring consistent performance on iOS and Android.
- Built intelligent onboarding and adaptive recommendation systems, improving user engagement and personalization.
- Built admin panels in React with CSV and Excel report ingestion and role-based access control features.
- Integrated many 3rd-party services like Twilio and Intercom, enhancing communication and user support workflows.
- Improved large file upload performance by migrating from single to chunked uploads using AWS S3 and GCP.
- Architected a HIPAA-compliant back end along with AWS S3 for secure medical document storage and retrieval.
- Configured GitHub Actions CI/CD pipelines with AWS EC2 deployment for automated builds, testing, and releases.
- Managed and mentored a team of four developers, ensuring timely delivery and maintaining high code quality standards.
Full-stack Developer
DevMinds Studio
- Developed scalable front-end applications using React and Next.js, improving performance, SEO, and user experience.
- Enhanced reporting systems by optimizing complex PostgreSQL queries, significantly improving data processing speed.
- Improved and maintained GraphQL APIs, enabling efficient data fetching and seamless integration between the front and back end.
- Contributed to the migration of legacy Angular components to React, modernizing the application architecture.
- Integrated webhooks and external systems to ensure real-time data synchronization across services.
- Assisted in cloud deployments and release cycles using Azure, ensuring stable and reliable production releases.
- Provided production support and debugging, resolving critical issues and improving system stability.
Junior Full-stack Developer
Fliclicks
- Built full-stack MERN web applications across the eCommerce and education industries.
- Developed responsive React UIs and RESTful APIs with Node.js and Express, serving multiple international clients.
- Integrated Stripe payment gateways and JWT/OAuth authentication into production web applications.
- Implemented MongoDB schemas and optimized queries for efficient data handling across multiple client projects.
- Deployed web applications to cloud platforms with environment configuration, CI/CD, and post-launch support.
Experience
MyBacked — Poker Staking Management SaaS
http://mybacked.comKey wins:
I validated and corrected the financial calculation engine to guarantee accurate outputs; hunted down and eliminated silent failure bugs that were failing without surfacing errors; hardened client-side encryption; and closed data-access gaps by auditing and fixing Supabase Row Level Security (RLS) policies. I reviewed and fixed the Stripe integration end-to-end, including payment intent flow and webhook handler reliability, to ensure payments couldn't break in production.
I delivered a structured readiness report mapping every blocker and post-launch risk, giving the client a clear, confident path to launch. The depth of issues found and resolved turned a short audit into the foundation for an extended engagement.
Sales Pulse — Sales CRM
I stabilized and refactored the full stack as a senior developer.
KEY IMPLEMENTATIONS
• Enforced granular RBAC (Admin, Team Lead, AE, and SDR) across leads, tasks, and teams, including create, edit, and delete permission boundaries per role.
• Built multi-team membership so team leads can head and manage multiple teams simultaneously.
• Implemented plan-team associations with LinkedIn, email, and call toggles.
• Added CSV import and export with optional plan, team, and team lead assignment; prevented duplicate leads and fixed card-to-detail page inconsistencies.
• Built a production-grade bulk-action undo system with snapshot rollback, conflict detection, and force-undo for admins. Resolved 800+ bugs across eight pages, added proper database migrations, enforced UTC time zones, and implemented full TypeScript type safety.
Fittish — AI-powered Fitness and Meal Planning App
I implemented an AI recommendation engine using LangChain and OpenAI to generate adaptive workout plans and multi-meal nutrition suggestions based on user goals, progress, and preferences. The system supports dynamic meal aggregation and personalized insights. I also integrated 3rd-party services, including RevenueCat for subscriptions and Apple HealthKit and Google Fit for activity tracking. The platform was designed for scalability, modularity, and real-time user personalization, enabling a seamless and intelligent user experience across iOS and Android.
Nova Vita — Medical Records and Body Scan App
• Led a team of three engineers end-to-end. Built the mobile app using React Native Expo and TypeScript, and an admin panel in React for CSV and Excel medical report ingestion. Developed a secure Node.js and Express back end with MongoDB and AWS S3 for HIPAA-compliant PDF storage and retrieval.
• Implemented OTP authentication, biometric login, and Intercom and Twilio integrations for in-app user communication. Configured GitHub Actions CI/CD pipelines for automated builds and AWS EC2 deployments.
Duro Labs — Product Lifecycle Management Platform
https://durolabs.co/• Contributed to critical infrastructure improvements, including migrating file uploads from single to chunked upload architecture using AWS S3 and GCP, significantly improving reliability and performance for large file handling.
• Implemented new feature additions across the platform, performed codebase refactoring and cleanup, and upgraded outdated libraries to maintain performance and security standards. Provided end-to-end customer support, including deep-dive debugging, bug fixes, and issue resolution to ensure platform stability.
Holmz — Investor-Startup Fundraising Platform
• Built the entire responsive front end from scratch using React, TypeScript, and Material UI, focusing on scalability and clean component architecture.
• Later led the migration of the application to Next.js and TypeScript to significantly improve SEO performance, page load speeds, and overall user experience. Collaborated closely with the product and design teams using Figma to translate wireframes into pixel-perfect, performant interfaces.
Sapling HR — Cloud-based HRIS Platform
https://inprod.saplingapp.io/• Worked on the core platform with a focus on back-end performance and API reliability. Optimized complex PostgreSQL queries by rewriting them as raw SQL for significant performance gains.
• Developed a dedicated microservice for the reporting system, improving scalability and separation of concerns across the platform. Enhanced GraphQL APIs with multi-field user data handling and cross-system webhook integrations.
• Collaborated on the migration of a legacy Angular UI to React. Contributed to Azure-based deployments and supported release cycles alongside the release manager.
PassQual Health — Clinical Kiosk App
I architected and delivered the MVP end-to-end as the sole full-stack developer—owning the kiosk front end, back-end orchestration, and every third-party integration. I designed the patient-facing workflow, wired together the EHR, vitals, and video consultation layers, and built the system on AWS with observability and security baked in for real clinical environments.
The outcome: faster intake, consistent handoffs, and a scalable foundation ready for the next phase of growth.
Show/Quit — Real-time Multiplayer Card Game (PWA)
https://show-quit.netlify.app/I architected and delivered the platform end-to-end as the sole full-stack developer. I designed the entire UI in Google Stitch, synthesizing a "Digital Proscenium" design system, then implemented it with Tailwind CSS and shadcn/ui. I built a custom TypeScript game engine—a state machine covering the full turn cycle with shared validation logic across client and server via a monorepo.
I built the Node.js and Express.js back end with Socket.IO for real-time game events, Redis for low-latency session state, and PostgreSQL via Prisma for accounts, match history, and leaderboards. It was implemented with JWT auth, private rooms with invite codes, and public matchmaking.
On the front-end, I used React 19 and Vite with React Three Fiber for the 3D table scene, GSAP for choreographed animations, and Rive for victory and elimination effects, with a full Howler.js audio system. I ran automated end-to-end QA using a Vercel Sandbox agent browser. It's fully responsive and installable as a PWA.
Education
Bachelor of Engineering Degree in Computer Engineering
Comsats University Lahore - Lahore, Punjab, Pakistan
Certifications
AI Engineer Agentic Track: The Complete Agent & MCP Course
Udemy
Develop Al Agents with LangChain & LangGraph
Udemy
React Native - The Practical Guide
Udemy
Dissecting Ruby on Rails 5 - Become a Professional Developer
Udemy
GraphQL with React: The Complete Developers Guide
Udemy
React - The Complete Guide (incl. Next.js, Redux)
Udemy
React, Node.js, Express.js & MongoDB – The MERN Full-stack Guide
Udemy
Skills
Libraries/APIs
Node.js, REST APIs, React, Context API, Twilio API, OpenAI API, API Development, Stripe, React Native for Web, Auth, React Query, WebGL, Stripe Connect, React Navigation, React Hook Form, React Testing Library, Sidekiq, WebRTC, Stripe API, SendGrid API, Intercom API, WebSync, HubSpot API, Claude API, Shopify API, Google Maps, Apollo Client, Ruby ERB, Bolt
Tools
Git, Jira, GitHub, Figma, Zoom, Apple HealthKit, Expo, ChatGPT, Claude, Bitbucket, Claude Code, Sentry, Google Analytics, Visio, Pytest, TestFlight, GitLab CI/CD, Shadcn, TanStack Router, Prisma, Confluence, NGINX, RabbitMQ, Zapier, AI Prompts, Capacitor, Gradle, Codex, Postman, Slack, React Apollo, Mongoose, n8n, Drizzle ORM, Claude Agent SDK
Languages
TypeScript, SQL, HTML5, CSS3, JavaScript, Ruby, Python, CSS, ECMAScript (ES6), HTML, TypeScript 5, Swift, GraphQL, Java, PHP
Frameworks
Express.js, Next.js, Ruby on Rails (RoR), Material UI, Tailwind CSS, Redux, React Native, OAuth 2, MUI CSS, Ionic, Flutter, Ruby on Rails 7, Vanilla JS, Ant Design, NestJS, LangGraph, Electron, Relay, Ruby on Rails 5, AutoGen
Paradigms
Agile Software Development, HIPAA Compliance, Role-based Access Control (RBAC), Mobile Development, Gamification, REST, Back-end Architecture, Mobile UI Design, UX Design, UI Design, App Development, Continuous Delivery (CD), Continuous Integration (CI), ETL, Agile, Search Engine Optimization (SEO), Unit Testing, API Architecture, Database Design, Testing, Web Application Architecture, Microservices, Scrum, Automation, Real-time Systems, Low-code Development, Event-driven Architecture, DevOps, Event-driven Design (EDD), Model Context Protocol (MCP), Automated Testing, Penetration Testing, Code Refactoring
Platforms
Amazon Web Services (AWS), Netlify, OTP, Android, iOS, Vercel, Firebase, Heroku, Twilio, Kajabi, Docker, Replit, Mobile, Mapbox, Azure, Amazon EC2, Apache Kafka, Algolia, Google Cloud Platform (GCP), Kubernetes, LangSmith, CrewAI
Storage
PostgreSQL, MongoDB, MySQL, Redis Cache, Amazon S3 (AWS S3), Databases, Redis, Data Pipelines, Cloud Firestore, JSON, Amazon DynamoDB, Elasticsearch, PostGIS
Industry Expertise
Web Design, Project Management, Social Media
Other
React Native / Expo, MERN Stack, Web Development, Mobile App Development, Zustand, Full-stack, iOS App Development, Android App Development, App Store Deployments, Google Play Store Deployments, System Design, WebSockets, Third-party APIs, Architecture, Artificial Intelligence (AI), HIPAA, HIPAA Electronic Data Interchange (EDI), API Integration, User Experience (UX), User Interface (UI), Full-stack Development, Design, Front-end Development, Mobile Apps, Agentic AI, Front-end, APIs, Large-scale Projects, HTTP, Back-end Development, Scalability, Education Technology (Edtech), SaaS, Casino Games, Prompt Engineering, Dashboards, CRM, Pipelines, Bug Fixes, Legacy Software, Performance Optimization, Financial Systems, Code Auditing, Code Review, Progressive Web Applications (PWAs), Data Analytics, Back-end, Back-end Performance, AI-generated Code, Mobile Wallet, Chrome Extensions, Push Notifications, Supabase, Auditing, Audits, Storage, AI Tools, Cursor AI, Tools, Minimum Viable Product (MVP), Linux Servers, Generative Artificial Intelligence (GenAI), Product Management, Integration, Modular, Product Ownership, Product Strategy, Strategy, System Improvements, Third-party Integration, Styled-components, General Data Protection Regulation (GDPR), React Components, PWA, Security, Documentation, Reporting, Application Modernization, Authorization, Authentication, Payment APIs, App Store, Performance, Mobile Architecture, AI-assisted Development, Debugging, Recommendation Systems, Vibe Coding, eCommerce, Software Architecture, Computer Science, Website Performance, Multitenancy, Solution Architecture, Human Resources (HR), Client Communication, Customer Support, Troubleshooting, DNS, Cross-platform App Development, Integrations, Optimization, Websites, SEO Tools, System Architecture, Webhooks, Web App Development, Multi-tenant SaaS, Dashboard Development, Product Design, Web App UX, Streaming, Agentic Coding, Technical Architecture, LLM Integration, Optical Character Recognition (OCR), Data Privacy, Healthcare Software, Maps, Fractional CTO, API Design, API Documentation, Responsive UI, Monitoring, Interactive UI, Application State Management, Application Security, Payments, Apple Pay, OAuth, Google Analytics 4 (GA4), Intercom, Single Sign-on (SSO), Server-side Rendering (SSR), Query Optimization, Payment Gateways, Billing, MVP Design, Azure Blog Storage, role based access control, ChatGPT API, Data Encryption, Open Source, Privacy, Software as a Service (SaaS), Supabase Auth, Monorepos, Vite, Startups, Production Engineering, LangChain, AI Agents, Bootstrap 5, Google Fit API, CI/CD Pipelines, GitHub Actions, AI Integration, Team Leadership, Biometric Authentication, Technical Leadership, Healthtech, Pharmacy, Health, Chatbots, Large Language Models (LLMs), Speech-to-Text (STT), No-code Development, Developer Relations, Anthropic, Workflow Automation, Data Modeling, Financial Data Analytics, QR Codes, Internet of Things (IoT), Wireless Protocols, Web Extensions, AI Automation, AI Research, Encryption, Row-level Security (RLS), Routing, Web Servers, Containerization, Venture Capital, Lovable, Cloudflare, Document Processing, PDF, Live Chat, Cloud Infrastructure, Marketplaces, Agentic Workflow Design, SMS, Leadership, Email Automation, FastAPI, GDPR, Multi-agent Systems, Microsoft Azure, Spotify, Amazon Bedrock AgentCore, UI Development, Bun, Cloud, Linear, App Store Connect, Google Play Console, Howler.js, React-Three/fiber, Apollo Server, AI Code Stabilization, Radix UI, AI-Generated Code Review & Hardening, Resend, Video Calling, OpenAI SDK, Retrieval-augmented Generation (RAG), Machine Learning, Lean, Taxation, Fintech, Financial Services, Workflow Automation & System Integration, Computer Vision, Offline Data Synchronization
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