
Azhar Zafar
Verified Expert in Engineering
Software Developer
Kasur, Punjab, Pakistan
Toptal member since September 5, 2022
Azhar, a top-tier software developer, and AI expert builds high-performance apps with React, Next.js, NestJS, and AWS. He’s crafted scalable, AI-driven solutions for AM Insights, ETF Stream, Othership, FusionOS, and Upbook, optimizing fund data, content platforms, and AI-powered marketing. His expertise in automation, cloud scalability, and seamless UX fuels business growth. Azhar turns ideas into cutting-edge solutions, ensuring innovation, efficiency, and impact in a tech-driven world.
Portfolio
Experience
- JavaScript - 9 years
- React - 9 years
- Node.js - 8 years
- TypeScript - 8 years
- REST APIs - 8 years
- Amazon Web Services (AWS) - 7 years
- NestJS - 7 years
- Next.js - 6 years
Availability
Preferred Environment
Git, Visual Studio Code (VS Code), Docker, Linux, JavaScript, Amazon Web Services (AWS), Kubernetes, Node.js, PostgreSQL, Angular, Full-stack Development, Web Development, React, Python, Front-end
The most amazing...
...system I've built is a centralized data system to synchronize the data between Salesforce and custom applications using REST APIs and Webhooks.
Work Experience
Senior Software Engineer
Changing Digital
- Built a dynamic news platform using Vue Storefront, Contentful, and TypeScript; paired it with a React Native app to fix mobile UX bottlenecks, boosting UI performance and flexibility by 50%.
- Migrated a monolithic blog front end to Nuxt.js with SSR and ISR to resolve SEO and indexing issues, boosting organic traffic by 60% and decreasing First Contentful Paint (FCP) by 40% on dynamic routes.
- Rebuilt an ETF-focused events booking platform using Vue and Bubble.io, enabling reactive scheduling workflows and real-time UI updates, which reduced admin overhead by over 60%.
- Optimized API responses in a news app with GraphQL and NestJS, reducing data fetching time by 70% and improving app responsiveness.
- Implemented AWS Lambda for a serverless content delivery system, cutting infrastructure costs by 35% while maintaining high availability.
- Enhanced microservices architecture with Docker and Amazon ECS, improving deployment efficiency and reducing downtime to under 0.1%.
- Revamped a web application UI with Tailwind CSS and Material UI, achieving a 30% faster page rendering time and improved accessibility.
- Designed a headless CMS architecture using Contentful and WordPress API, enabling seamless content management and reducing admin overhead by 50%.
- Established a CI/CD pipeline with GitHub Actions and AWS DevOps, automating deployments and decreasing release cycles by 60%.
- Integrated OAuth authentication with Auth0 for a web platform, ensuring secure user access and reducing unauthorized access risks by 90%.
Full-stack Developer
Mixi Group
- Engineered DAZN Moments, a sports-specific NFT marketplace, using Solidity, Alchemy, and Chainlink, enabling secure and verifiable NFT transactions.
- Designed immersive 3D NFT galleries with Three.js, Babylon.js, and WebGPU, enhancing the user experience with high-performance Web3 visuals.
- Optimized blockchain interactions in DAZN Moments using Wagmi and Alchemy SDK, reducing gas fees by 40% and improving transaction speed.
- Developed a fully responsive NFT storefront using Nuxt.js, Vue Storefront, Tailwind CSS, and Web3.js, enabling device-agnostic minting and fast SSR rendering.
- Built a decentralized lottery runner mini-app in Bubble, integrating Chainlink VRF for provably fair draws and automating lottery management.
- Led integration of Nuxt.js and Vuex with NestJS and Apollo Server in NFT platforms, achieving efficient SSR rendering and scalable front-to-back GraphQL workflows.
- Implemented real-time WebSocket communication with Socket.IO for instant NFT auction updates, increasing user engagement by 60%.
- Leveraged Arweave and Cloudflare for decentralized NFT metadata storage, ensuring long-term data integrity and reducing infrastructure costs.
- Integrated GCP and AWS Lambda for a scalable Web3 API back end, enhancing NFT metadata retrieval and reducing server costs by 35%.
- Developed smart contract-based sports betting mechanics using Solidity and Chainlink oracles, ensuring accurate real-time odds calculation.
Senior Software Engineer
Kwanso
- Developed a virtual learning platform using Nuxt.js, Node.js, and PostgreSQL, improving SEO with SSR and optimizing session management, boosting engagement by 40%, and streamlining workflows for webinar sessions.
- Integrated Salesforce automation with Vue Storefront using REST APIs and webhooks, streamlining customer sync and reducing manual data entry by 60%.
- Engineered a help-center module with Vue and integrated Intercom, streamlining support workflows, reducing ticket resolution time by 40%, and improving user satisfaction with a more intuitive interface.
- Built GraphQL APIs with NestJS and Apollo Server, optimizing data retrieval, improving performance by 50%, and enabling seamless 3rd-party integrations.
- Developed AI-powered chat agents using OpenAI API, WebRTC, and a Vue interface, increasing customer engagement and driving 30% higher eCommerce conversions by providing instant support.
- Created an AI-driven monitoring tool for child safety using NLP, enhancing parental visibility, analyzing risks, and supporting online mental health.
- Optimized caching with Redis and PostgreSQL, reducing query latency by 70% under peak loads and improving system scalability for high-traffic apps.
- Implemented CI/CD pipelines with GitHub Actions, Docker, and Terraform, accelerating deployments by 80% and ensuring reliable rollback strategies.
- Designed scalable PostgreSQL and PlanetScale architectures, ensuring 99.99% uptime, high availability, and optimal performance for enterprise applications.
- Integrated Stripe payments with OAuth authentication, enabling seamless subscription management, improving security, and reducing failed transactions.
Software Developer
DVMelite
- Built a HIPAA-compliant rewards system using Angular, uncovering engagement patterns that maximized client retention.
- Developed a real-time dashboard with RxJS, identifying motivational triggers that enhanced staff performance and incentives.
- Architected AWS security with KMS and IAM, detecting access control weaknesses and fortifying HIPAA compliance strategies.
- Implemented Amazon CloudWatch-based logging, uncovering threat patterns and improving proactive security response for compliance.
- Encrypted patient records with AWS KMS, analyzing data flow vulnerabilities and ensuring ironclad regulatory compliance.
- Automated reporting workflows in a Vue and Vue Storefront setup using amCharts, exposing inefficiencies and improving operational data visibility.
- Optimized PostgreSQL queries with Redis caching, identifying bottlenecks that reduced latency and enhanced system performance.
- Integrated CI/CD pipelines with GitHub Actions, streamlining deployments and detecting regression patterns before release.
- Secured medical data with Amazon S3 encryption, uncovering storage misconfigurations and ensuring long-term compliance stability.
- Enhanced authentication with OAuth 2.0 and Cognito, identifying breach patterns and strengthening identity verification processes.
Software Developer
Public Health Engineering Department
- Engineered internal automation tools with Node.js, Express, and MySQL, streamlining workflows and reducing manual effort by 60% for department teams.
- Architected a scalable back-end system using Node.js, Express, and MySQL, optimizing data processing speed by 50% and ensuring seamless system integrations.
- Revamped a legacy jQuery-based front end by migrating to a React application, enhancing performance, maintainability, and user experience.
- Modernized a legacy jQuery-PHP stack by migrating to Vue with Vue Storefront, reducing tech debt by 40% and enabling modular, scalable UI development.
- Spearheaded projects from ideation to deployment, implementing CI/CD pipelines and DevOps best practices to accelerate delivery cycles by 30%.
- Developed an API-first document system using Node.js and Vue Storefront, reducing processing time by 70% and improving UX across multi-departmental workflows.
- Integrated real-time GIS mapping solutions with government housing data, enabling accurate land assessment and improving urban planning efficiency.
- Implemented secure authentication using OAuth 2.0 and JWT, improving access control and protecting sensitive government data from unauthorized access.
- Optimized SQL queries and database indexing, reducing query execution times by 45% and enhancing performance for large-scale government datasets.
- Designed an analytics dashboard with React and Chart.js, providing real-time insights into housing development projects and improving decision-making.
Software Developer
Vertexol Software Solutions
- Developed and maintained full-stack web applications using React, Node.js, PHP, and MySQL, optimizing performance and scalability.
- Engineered reusable React components following best design patterns, improving code maintainability and UI consistency across applications.
- Designed and implemented sleek, responsive UIs with React, HTML, and CSS, enhancing user experience and accessibility.
- Optimized RESTful APIs with Node.js, Express.js, and MongoDB, improving data retrieval efficiency by 40%.
- Led front-end development for eCommerce platforms using Vue and Vue Storefront, integrating secure payments and improving checkout conversion rates.
- Integrated NoSQL and SQL databases, designing efficient data models to handle high-traffic applications with minimal latency.
- Implemented dynamic WordPress solutions, customizing plugins and themes to enhance client business operations.
- Automated deployment pipelines using GitHub Actions, reducing production deployment times by 50%.
- Refactored legacy jQuery codebases to Vue and Vue Storefront, improving UI modularity, front-end performance, and long-term maintainability.
- Launched multiple web applications into production, increasing business revenue and customer satisfaction through seamless UI/UX and back-end optimizations.
Experience
AM Insights
https://www.aminsights.comAs a senior software engineer, I led the development of scalable microservices using NestJS and MongoDB, ensuring real-time fund tracking. I built automated pipelines with n8n for seamless data ingestion from Morningstar and NocoDB, optimizing processing with Elasticsearch. I implemented authentication, watchlists, and interactive financial charts on the front end using React, enhancing user experience and decision-making. I also developed a cross-platform (Android and iOS) mobile app that led to an increase in user base with improved and easy access to valuable insights.
ETF Stream
https://www.etfstream.com/As a software engineer, I led the migration from Umbraco to a modern stack, enhancing SEO, speed, and scalability. Using Next.js and React, I optimized performance with SSR and ISR while integrating Contentful and Builder.io for dynamic content management. I also developed an event management system, enabling seamless ETF event booking and administration.
FusionOS
https://www.fusionos.ai/As a full-stack developer, I led the front-end development with React and TypeScript, crafting an intuitive UI for AI-driven content creation. I also integrated AI-powered ad generation workflows and implemented scalable background job processing with AWS Lambda and SQS to ensure seamless automation. Additionally, I incorporated Adobe Image API for AI-assisted visuals and Facebook Pixel for precise ad tracking. To make the platform accessible to a broader audience, I also developed a cross-platform mobile app, ensuring that users can interact with the platform seamlessly across different devices.
UPbook
https://www.upbook.com/As a software developer, I was responsible for the platform's architecture, security implementation, and performance optimization. I designed and developed a highly efficient authentication and authorization system while ensuring HIPAA compliance for sensitive data handling. Additionally, I created an intuitive, real-time analytics dashboard and integrated various third-party services to automate clinic operations. To further enhance accessibility, I also developed a cross-platform mobile app, making the platform more accessible to a larger number of veterinary professionals and clinic staff.
College Advisor
https://www.collegeadvisor.comAs a full-stack developer, I played a key role in the development of the platform, contributing to front-end and back-end systems. I worked on integrating the webinar system, Salesforce, and help-center modules and also designed user-friendly interfaces with React and Next.js. I also built a cross-platform mobile app to ensure accessibility for a broader audience, making the platform available to students and advisors on the go.
Restorative Record—ILR Cornell
https://restorativerecord.ilr.cornell.edu/Othership
https://venues.othership.comDAZN Moments
Education
Bachelor's Degree in Software Engineering
Lancaster University - Lancaster, United Kingdom
Certifications
Certified React Developer
Epic React
Skills
Libraries/APIs
React, Node.js, REST APIs, jQuery, Stripe, D3.js, Three.js, Socket.IO, Vue, GSAP, Playwright, OpenAI API, WebRTC, RxJS, NgRx, Chart.js, Leaflet, React Query, Puppeteer, Framer Motion, React Hook Form, Twilio API, Stripe API, Google Calendar API, FedEx API, Google Maps API, Google Maps, SQLAlchemy, Pydantic, Vue 3, Flask API, Beautiful Soup, PostgREST, Mypy, Plaid API, Shopify API, AG Grid, X (formerly Twitter) API, React Testing Library, Revit API, HTML5 Web Workers, Cytoscape.js, Mantine, daisyUI, AWS Amplify, Highcharts, Google Translate API, LocalStorage, React Redux, Wagmi, Babylon.js, WebGPU, WebGL, jQuery UI, Lodash, OpenAPI, Recharts, TensorFlow, Hugging Face Transformers, Segment.io, Mailchimp API, HubSpot API, Formik, Zod, Sharp, Workday API, Intercom API, Mapbox GL, Mandrill API, Google Places API
Tools
Git, Amazon Simple Queue Service (SQS), Mailchimp, GitHub, Webpack, Figma, Terraform, Prisma, Sequelize, n8n, Amazon CloudFront, Whisper, Zapier, AWS CloudFormation, Firebase Authentication, SendGrid, Stripe Checkout, AWS Step Functions, Plotly, Kafka Streams, Amazon SageMaker, ChatGPT, BigQuery, FileMaker, NPM, AWS SDK, RabbitMQ, Amazon Athena, Pytest, Nx, Grafana, Autodesk, Grasshopper, Revit, Shadcn, Amazon OpenSearch, CircleCI, MQTT, Xero, AWS Cloud Development Kit (CDK), GitLab, Auth0, Bubble, Amazon Elastic Container Service (ECS), Amazon CloudWatch, AWS CloudTrail, AWS ELB, AWS IAM, Jenkins, Mocha, Postman, RedBean ORM, Amazon Cognito, AWS Key Management Service (KMS), ELK (Elastic Stack), Amazon CloudFront CDN, NGINX, Mongoose, Amazon Simple Email Service (SES), Lighthouse, Cron, Builder.io, Facebook Pixel, Google Analytics, Multer, Sentry, OWASP Zed Attack Proxy (ZAP)
Languages
JavaScript, TypeScript, GraphQL, PHP, HTML, CSS, SQL, Python, ECMAScript (ES6), SCSS, Solidity, Go, C#, HTML5, CSS3, Clojure, Java, Swift, Objective-C, Snowflake, Sass
Frameworks
Express.js, Angular, NestJS, Next.js, Material UI, Tailwind CSS, Redux, React Native, Nuxt.js, Svelte, Jest, OAuth 2, Bootstrap, Django, Flutter, Flask, AutoGen, Electron, Laravel, Symfony, Ruby on Rails (RoR), Scrapy, Selenium, Serverless Framework, i18next, Streamlit, Knockout (Knockout.js), Ionic, Grails, Alchemy, Recoil, tRPC, Cypress, Swagger, JSON Web Tokens (JWT), Fastify, ImageIO, Spring ORM, Angular Material, SST
Paradigms
HIPAA Compliance, REST, Responsive Layout, Microservices, Responsive Web Design (RWD), Search Engine Optimization (SEO), DevOps, Unit Testing, Web Performance Optimization (WPO), Automation, Gamification, ETL, DevSecOps, Mobile Development, UI Design, UX Design, User Acceptance Testing (UAT), Hosting, Scalable Application, Fast Healthcare Interoperability Resources (FHIR), B2C, Test-driven Development (TDD), Object-oriented Programming (OOP), Low-code Development, Agile, Scrum, Modular Design, CSRF Protection, Role-based Access Control (RBAC)
Platforms
Amazon Web Services (AWS), Docker, Salesforce, AWS Lambda, WordPress, Vercel, Google Cloud Platform (GCP), Kubernetes, Mapbox, Firebase, Heroku, Twilio, Shopify, Temporal Cloud, Azure, OpenCart, Cloud Run, iOS, Android, Ethereum, Apache Kafka, AWS IoT, Jupyter Notebook, GreenSock Animation Platform (GSAP), Replit, AWS Elastic Beanstalk, Blockchain, Cardano, Mobile, Sanity Studio, Typesafe, Linux, MacOS, Amazon EC2, Visual Studio Code (VS Code), Contentful, Chainlink, PlanetScale, Netlify, New Relic, NoCodeAPI, Algolia, Duo, Clerk
Storage
MongoDB, PostgreSQL, NoSQL, Databases, MySQL, Redis, Amazon S3 (AWS S3), Amazon DynamoDB, JSON, Datadog, Microsoft SQL Server, ClickHouse, Data Pipelines, PSQL, Data Integration, Redshift, Database Management Systems (DBMS), Elasticsearch, Hasura
Industry Expertise
Healthcare
Other
Software Architecture, Web Development, SaaS, User Interface (UI), Front-end, Back-end, Full-stack, Architecture, Responsive UI, Responsive Web Apps, APIs, Web Applications, Web UI, OAuth, API Integration, CI/CD Pipelines, Charts, Headless Software, Gatsby, Progressive Web Applications (PWAs), Zustand, Full-stack Development, Web3, eCommerce, Machine Learning, Apollo Server, WebSockets, Cloudflare, Chakra UI, Storybook, Deno, Supabase, Styled-components, Server-side Rendering (SSR), LangChain, FastAPI, Amazon API Gateway, Amazon RDS, Squarespace, BrainTree, Healthcare Software, AI Agents, Chatbots, Back-end Development, Data Analytics, AWS Certified Solution Architect, Load Time, PHP Performance, Performance, Site Speed Optimization, Website Performance, Geographic Information Systems, Vehicle Routing Problem (VRP), Payment APIs, Startups, Matching Systems, User Profiles, Websites, Front-end Development, Dash, Real-time Data, Terraform Cloud, Mobile App Development, Web Scraping, Artificial Intelligence (AI), Ethereum Virtual Machine (EVM), SvelteKit, Office Add-ins, OpenAI, OpenAI GPT-3 API, Large Language Models (LLMs), Pinecone, Retrieval-augmented Generation (RAG), Agentic AI, Solution Architecture, lovable.dev, CTO, Fractional CTO, Data Build Tool (dbt), Trade Finance, Trading, Railway, Vector Databases, lang flow, letta, Containerization, Microsoft Defender XDR, Minimum Viable Product (MVP), Tailwind UI, Web Crawlers, Website Data Scraping, Chrome Extensions, Large-scale Web Crawlers, Web Extensions, Extensions, Payment Processing, Implementation, Project Management, Scripting, Workflow Automation & System Integration, Images, Async.js, Poetry, Ruff, Authentication, Row-level Security (RLS), AI Tools, Bluetooth, Strapi, Data Scraping, Scraping, Uniform Commercial Code (UCC), Browserbase, Code Review, Auditing, GPT Trainer, Data Visualization, UI Development, Vue Storefront, User Experience (UX), Pixel Perfect, iOS Animations, Android Animations, CSS Animations, UI Animation, Deep Learning, Document Parsing, Customer Relationship Management (CRM), AG Charts, Leadership, Data Enrichment, Technical Leadership, Prompt Engineering, DocumentDB, Third-party APIs, Argo CD, IoT Protocols, IoT Security, Single Sign-on (SSO), Dental Services Organizations, HIPAA Electronic Data Interchange (EDI), Health, Payment Gateways, Software as a Service (SaaS), 3D, Amazon EventBridge, Autodesk Revit, Generative Artificial Intelligence (GenAI), Component Design System, Admin Management Dashboard, Google Cloud Functions, WebAssembly (Wasm), Game Engine Programming, Event Management, ChatGPT API, Figma to React, Cursor AI, Geist, GitHub Copilot Chat, Radix UI, ShadCN UI, Browser Automation, Robotic Process Automation (RPA), Mobile Apps, Headless Shopify, Data Engineering, Games, Mobile Games, Cloudinary, Fintech, Business Loans, Digital Payments, Stripe Terminal, OpenStreetMap, AI Integration, Big Data, OutSystems, SSG, ElevenLabs Solutions, Vapi.ai, Speech to Text, Speech to Text AI, AWS App Runner, Temporal, Reverse Engineering, User Authentication, hudu, Webhooks, Serverless, Software Design, Educational Platform Design, No-code Development, AWS DevOps, Software Engineering, Data Structures, Programming, Algorithms, Data Encryption, Non-fungible Tokens (NFT), Software Development Lifecycle (SDLC), Machine Learning Operations (MLOps), AIOps, SDKs, Arweave, Firebase Cloud Functions, TypeORM, Firebase Hosting, GitHub Actions, XState, TensorFlow.js, ESLint, React Helmet, OWASP, Bcrypt, AWS Secrets Manager, Transport Layer Security (TLS), Security Information and Event Management (SIEM), LogRocket, ECharts, RESTFul APIs, BullMQ, SSL, ECS, Nodemailer, Rate-limiter-flexible, Builder, Schemas, Lazy Loading, WebP, Sitemaps, Analytics, Core Web Vitals, Smart Entry Services (SES), Framer, OpenAI GPT-4 API, Adobe Image API, DALL-E, Replicate API, Rate Limiting, SAML 2.0, Google Cloud AI Services, General Data Protection Regulation (GDPR), CORS, Middleware, Two-factor Authentication (2FA), Cross-site Request Forgery (CSRF), NextAuth.js, GraphQL Federation, React Hooks, Security (AES-CCM), Tiptap, Amazon Bedrock
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