Senior Software Engineer
Senior Software Engineer with 6+ years of expertise in architecting and delivering scalable full-stack solutions. Specialized in blockchain technology, enterprise web applications, and cross-platform mobile development. Proven track record of transforming complex business requirements into elegant, high-performance digital experiences using cutting-edge technologies and industry best practices.
About Me
I'm Umer Hashim Qureshi, a Senior Software Engineer and Full Stack Developer with a passion for building exceptional digital experiences. As a self-taught developer, I've cultivated a deep understanding of the entire software development lifecycle—from conceptualization and architecture to deployment and optimization. My approach combines technical excellence with user-centric design, ensuring every solution I create is not only functionally robust but also intuitive and scalable. I'm driven by the challenge of transforming complex problems into elegant, high-quality code that makes a real impact.
Software Engineer - ExpansifyAI
2024-Present
- Managed a development team working with the MERN (React and React Native) stack, overseeing project delivery, code quality, and timelines using Jira and Linear
- Led knowledge-sharing sessions and mentorship programs to enhance team skills and foster best practices in TypeScript and modern React patterns
- Took full ownership of projects, building AI-powered applications from scratch using Next.js 14, tRPC, and Prisma ORM
- Designed and implemented scalable, secure SaaS and blockchain solutions with Solidity, Hardhat, and Web3.js
- Managed cloud infrastructure on AWS (ECS, Lambda, RDS, S3, CloudFront, Route 53) and implemented CI/CD pipelines with GitHub Actions and Docker
- Orchestrated containerized microservices using AWS EKS (Kubernetes) and monitored system health with AWS CloudWatch, Datadog, and Sentry
- Integrated OpenAI GPT-4, Claude, and Anthropic APIs to build intelligent chatbots and AI-powered features
- Developed LLM-based applications using LangChain, vector databases (Pinecone, Weaviate), and RAG (Retrieval-Augmented Generation) patterns
- Implemented fine-tuning pipelines for custom AI models and deployed them on AWS SageMaker
- Built real-time AI assistants with streaming responses using Server-Sent Events (SSE) and WebSockets
- Developed reusable component libraries with Storybook and implemented design systems using Tailwind CSS and Radix UI
- Conducted code reviews, enforced coding standards with ESLint and Prettier, and improved team productivity by 40%
- Integrated Stripe, PayPal, and Plaid APIs for payment processing and financial data aggregation
- Implemented real-time features using Socket.io and Redis for caching, pub/sub messaging, and rate limiting
- Built custom ML algorithms with TensorFlow.js and automation tools using n8n and Zapier integrations
- Optimized database queries with PostgreSQL indexing and implemented GraphQL APIs with Apollo Server
- Configured AWS Lambda functions for serverless computing and used AWS Step Functions for workflow orchestration
- Implemented AWS Cognito for authentication, AWS SNS/SQS for messaging, and AWS DynamoDB for NoSQL data storage
- Participated in architecture design discussions using C4 model and documented systems with Notion and Confluence
Senior Software Engineer - SenaryBits
2020-2022
- Managed MERN (React) & MENN (Next.js) stack developers using Agile methodologies and Scrum framework with Azure DevOps
- Facilitated knowledge-sharing sessions on React Hooks, Vue.js Composition API, Redux Toolkit, and Vuex state management
- Built high-performance applications with Next.js, Express.js, Vue.js 3, and MongoDB Atlas with Mongoose ODM
- Developed Python microservices using FastAPI and Flask, integrated with Node.js backends via REST and gRPC
- Deployed applications on GCP (Google Cloud Platform) using Cloud Run, Cloud Functions, and Cloud SQL
- Managed infrastructure on AWS (EC2, S3, CloudFront) and GCP (Compute Engine, Cloud Storage, Cloud CDN)
- Specialized in SaaS and blockchain development using Ethereum, Polygon, and IPFS for decentralized storage
- Implemented error tracking and monitoring with Sentry, LogRocket, and Google Cloud Monitoring
- Designed responsive front-end interfaces using Material-UI, Chakra UI, Vuetify, and Framer Motion animations
- Built data processing pipelines with Python (Pandas, NumPy) and scheduled jobs using Google Cloud Scheduler
- Conducted code reviews using GitHub Pull Requests and enforced quality gates with SonarQube
- Integrated Stripe Connect, Razorpay, and cryptocurrency payment gateways (Coinbase Commerce)
- Optimized MongoDB aggregation pipelines and implemented Redis caching to reduce API response times by 60%
- Configured GCP Pub/Sub for event-driven architecture and used BigQuery for analytics and data warehousing
- Mentored 5+ junior developers on clean code principles, SOLID design patterns, and TDD practices
- Led CI/CD pipelines with Jenkins, Google Cloud Build, and Docker Compose for automated testing and deployment
- Developed comprehensive test suites using Jest, Pytest, React Testing Library, and Cypress for E2E testing
- Created technical documentation with Swagger/OpenAPI and maintained wikis on Confluence
- Participated in sprint planning and retrospectives, contributing to OKR-based product roadmaps
Software Engineer - ColorElephant
2020-2021
- Integrated RESTful APIs, GraphQL endpoints, and third-party SDKs including Twilio, SendGrid, and DigitalOcean Spaces
- Collaborated with product managers using Figma and Miro to translate wireframes into pixel-perfect React components
- Built 3D simulation systems using Three.js and WebGL for interactive product visualization and design validation
- Deployed applications on DigitalOcean Droplets and App Platform with automated scaling and load balancing
- Managed CI/CD pipelines using GitLab CI/CD with automated testing, Docker builds, and deployment to DigitalOcean
- Configured DigitalOcean Managed Databases (PostgreSQL, Redis) and implemented backup strategies
- Performed code reviews and debugging with Chrome DevTools, implemented error boundaries, and used Rollbar for error tracking
- Created comprehensive API documentation with Postman collections and maintained runbooks in Notion for DevOps procedures
- Implemented authentication flows with Auth0 and JWT tokens, ensuring secure session management
- Optimized bundle sizes using Webpack code-splitting and lazy loading, reducing initial load time by 45%
- Used GitLab Container Registry for Docker image storage and version control
- Configured DigitalOcean Monitoring and Alerts for proactive infrastructure management
Software Engineer - Contractual
2017-2022
- Debugged complex issues using VS Code debugger, React DevTools, and implemented logging with Winston and Pino
- Facilitated tech talks on Vue.js, Angular, and modern JavaScript (ES6+) features and best practices
- Adopted emerging technologies including Svelte, Astro, and Remix for experimental projects and POCs
- Created comprehensive documentation using Markdown, JSDoc comments, and generated docs with TypeDoc
- Gained proficiency in Python (Django, Flask), PHP (Laravel), and Ruby (Rails) for full-stack versatility
- Translated Sketch and Adobe XD designs into responsive interfaces using Bootstrap, Foundation, and custom CSS Grid layouts
- Implemented progressive web apps (PWAs) with service workers and offline-first strategies using Workbox
- Integrated modern build tools including Vite, Turbopack, and esbuild for faster development workflows
- Conducted user research and A/B testing with Google Optimize and Hotjar to inform feature development
- Collaborated using Slack, Microsoft Teams, and participated in pair programming sessions via VS Code Live Share
- Implemented accessibility standards (WCAG 2.1) and tested with axe DevTools and Lighthouse audits
Front-End Developer - FTSITS
2020-2020
- Developed responsive websites using React with Hooks, WordPress with custom themes (PHP), and CodeIgniter MVC framework
- Ensured cross-browser compatibility testing with BrowserStack and optimized performance using Lighthouse and WebPageTest
- Implemented SEO best practices with structured data, meta tags, and integrated Google Analytics and Tag Manager
- Built custom WordPress plugins and integrated WooCommerce for e-commerce functionality
- Optimized images with WebP format, implemented lazy loading, and used CDN (Cloudflare) for faster content delivery
🎓 Education
Academic Background
Formal education combined with continuous self-learning to stay at the forefront of technology and software development.
MSc Computer Science
University of East London
BS Computer Science
COMSATS University
Additional Achievements
Educational Projects
Modules Learned
Technologies Mastered
🚀 Projects
Featured Work
A showcase of innovative projects spanning AI, Web3, VR, and full-stack development—transforming ideas into production-ready solutions.
MoodMap
Senary Finance
NFT HODL ZONE
Jozeko
🔄 My Workflow
How I Work
A streamlined development process that ensures quality, efficiency, and successful project delivery from concept to deployment.
Discovery & Planning
1Understanding your requirements and goals. I analyze your project needs, define the scope, and create a detailed plan to ensure we're aligned on the vision and deliverables.
Development & Testing
2Building your solution with clean, scalable code. I develop features iteratively, conduct thorough testing, and ensure everything works seamlessly across all platforms.
Deployment & Support
3Launching your project and providing ongoing support. I handle deployment, monitor performance, and offer maintenance to ensure your application runs smoothly.
💼 My Services
What I Do
Delivering enterprise-grade full-stack development solutions with specialized expertise in artificial intelligence, blockchain technology, and immersive experiences. I architect and build scalable platforms that leverage cutting-edge technologies including large language models, decentralized finance protocols, virtual reality environments, and cloud-native infrastructure. From intelligent AI agents that automate complex workflows to secure DeFi ecosystems handling millions in transactions, and immersive VR platforms transforming user experiences - I transform ambitious ideas into production-ready solutions. With a proven track record across Web3, AI/ML, mobile, and enterprise applications, I bring technical excellence, architectural vision, and a commitment to delivering high-performance, maintainable code that scales with your business.
AI & LLM Development
Building intelligent AI agents and platforms powered by GPT-4, Claude, and LangChain. Expertise in RAG patterns, vector databases (Pinecone, ChromaDB), and creating context-aware AI solutions that automate complex workflows.
Web3 & DeFi Development
Expert in Solidity smart contracts, DeFi protocols, NFT platforms, and decentralized applications. Built Asia's first comprehensive DeFi ecosystem with DEX, wallets, staking, and yield farming on Ethereum and BSC.
VR & 3D Development
Creating immersive VR experiences using Three.js, React Three Fiber, and WebXR. Specialized in 360-degree property viewing platforms, interactive 3D environments, and virtual reality applications for real estate and beyond.
Full-Stack Development
End-to-end development with Next.js, React, Node.js, TypeScript, and modern cloud infrastructure. Building scalable platforms with PostgreSQL, MongoDB, Redis, Docker, Kubernetes, and comprehensive monitoring with Sentry and Grafana.
Mobile Development
Cross-platform mobile applications using React Native with TypeScript. Creating fitness platforms, social media apps, and location-based services with real-time features, push notifications, and seamless native performance.
Platform Architecture
Designing and implementing scalable system architectures with microservices, CI/CD pipelines, and cloud infrastructure on AWS and GCP. Expertise in API design, database optimization, caching strategies, and performance monitoring.
⭐ Testimonials
What Do They Say About Me?
Real feedback from clients who trusted my development expertise to bring their projects to life successfully.
Tom Nash
CEO at ExpansifyAI
"Umer has been delivering exceptional AI solutions for our platform. His expertise in LangChain and GPT-4 integration was invaluable. The RAG implementation exceeded our expectations and the code quality was outstanding."
Khawaja AbdulRahman
CEO at SenaryBits
"Having Umer at SenaryBits has been fantastic. His full-stack expertise and ability to architect scalable solutions and manage teams made him an invaluable partner. Highly recommend for the companies dealing with complex technical products."
Ricardo Sousa
CEO at ColorElephant
"During his time with us Umer always displayed extreme professionalism and dedication. He was in charge of developing full-stack SaaS applications and in turning briefs into actual technology products."
Evan Luchs
Entrepreneur
"Very much enjoyed working with Umer. He has addressed all of my concerns and worked hard to complete our contract."
IntownNFT
CEO
"Thank you so much super easy to work with Umer and I'll definitely be taking more services from Umer."
Tom Pandolfi
Business Owner
"I'm very satisfied with Umer's work and professionalism."
4
Companies built from scratch
10+
Technologies mastered
6+
Years of Experience
Let's Connect
If you're looking for someone to explore collaboration opportunities — I'm open to discussing how we can work together.
Location
London, England, UK