I’m a Lead Full Stack Engineer with 8+ years of experience architecting, developing, and scaling high-performance applications across .NET Core, C#, TypeScript, JavaScript, React.js, Angular, Node.js, and Blazor, backed by robust cloud expertise in AWS and Azure.
My work has powered mission-critical systems at companies like Cimpress, InfoZest Digital Solutions, Ivy Mobility, and Maxval Technologies, where I built enterprise-grade solutions that improved performance, reliability, and developer productivity.
I excel at designing clean backend architectures using microservices, REST APIs, system design principles, caching, async patterns, and cloud-native deployments. On the frontend, I deliver intuitive, fast, and scalable UX using modern JavaScript frameworks.
Whether you need a scalable backend, a production-ready frontend, or an end-to-end application, I bring a disciplined engineering mindset—clean code, testing, documentation, automation, CI/CD, and performance optimization.
🔥 Core Technical Expertise
Backend & Cloud (Primary Strengths)
ASP.NET Core, C#, .NET Microservices, Web API
TypeScript, Node.js
ORM Expertise: EF Core, LINQ, SQL Optimization
Cloud:
AWS – EC2, Lambda, S3, CloudFront, RDS, Route53, CloudWatch, Elastic Beanstalk
Azure – App Services, Functions, Blob Storage, CI/CD Pipelines
Architectures: Distributed systems, event-driven communication, caching, async processing, performance tuning
Testing: Unit testing, integration testing, automation frameworks
Frontend
React.js, JavaScript, TypeScript
Angular, Blazor
Component-driven architecture, clean UI state management, API integration, performance optimization
💼 Experience Highlight
Lead Software Engineer – Cimpress
Built and led development of multiple mission-critical microservices from scratch using .NET Core, deployed on AWS Elastic Beanstalk, with full monitoring via CloudWatch & Kibana.
Designed scalable microservices architecture
Production-grade load testing using K6
Built React-based apps for internal workflows
Senior Software Engineer – InfoZest Digital Solutions
Delivered full-stack applications using ASP.NET Core + React, integrated payment gateways (Braintree, Authorize.Net, PayPal), and boosted app performance by 40% by migrating to EF Core.
Deployed enterprise apps to Azure App Services via CI/CD pipelines.
Software Engineer – Ivy Mobility
Developed secure and robust backend APIs for large-scale FMCG CRM workflows, with automated test coverage and productivity improvements of 30%.
Software Engineer – Maxval Technologies
Rebuilt legacy systems into modern Web APIs, improved performance by 50%, and delivered complex integrations with Autodesk Forge and BIM 360.
💡 What You Can Expect Working With Me
Clear communication and proactive problem-solving
Enterprise-level architecture & clean code
Fast development without compromising quality
Optimized APIs & cloud-native deployments
Frontend + backend + cloud = one full solution
Reliable, long-term partnership for ongoing development
If you’re looking for a high-end full stack engineer who can own your system end-to-end—from architecture to production deployment—let’s build something exceptional together.
Autodesk Revit
Autodesk AutoCAD
Automation
Angular Material
Unit Testing
JavaScript
ASP.NET MVC
Angular
ASP.NET Core
C#
TypeScript
Amazon Web Services
Sanket P.
Mumbai, India
$20/hr
4.8
8 jobs
Building a mobile app that works reliably, feels smooth, and scales well takes more than just coding. I help founders and teams build and maintain React Native apps that launch on time and remain stable. The apps I have built and led have reached more than 100,000 users, supported over 15 million messages, and generated thousands of paying customers.
I can take a project from concept to production or work on improving an existing app that needs attention, structure, or better performance.
-> How I Can Help
- Full React Native app development for iOS and Android
- Fast MVP development using Expo, TypeScript, Firebase and Node.js
- App maintenance, bug fixing and refactoring
- UI and UX improvements and onboarding enhancements
- Push notifications and real-time chat
- Backend and API development using Node.js, Firebase, Firestore and SQL
- Performance optimization and crash reduction
- Play Store and App Store deployment
->Why Clients Work With Me
- Built and scaled apps to more than 100K users and 15M real-time messages
- Experience across wellness, mental health, social and consumer applications
- Delivered multiple production apps as a freelancer with a previous 100 percent Job Success Score on Upwork
- Enterprise engineering experience for clients managing 15B USD AUM
- Clear communication and dependable, independent work style
-> Technologies I Work With
- Mobile: React Native, Expo, TypeScript, JavaScript
- Frontend: React, Angular, HTML/CSS
- Backend: Node.js, Firebase, Firestore, SQL, .NET Core
- Integrations: Push Notifications, Chat, Real-time Updates, Analytics, Payments
- Other: Git, API Development, CI/CD, Architecture, Debugging, Product Strategy
->Projects I Often Take On
- Building complete mobile apps from scratch
- Improving or maintaining existing React Native apps
- Adding new features and screens
- Fixing slow, buggy or crashing apps
- Integrating notifications, chat, analytics or third party APIs
- Improving app performance and architecture
- Supporting founders from idea to launch
-> Let’s Build Your App
If you have an idea, feature list or an existing codebase, I can review it and share
- a clear plan
- timelines
- an execution approach
- what to prioritize for a smooth launch
I focus on reliable delivery and a straightforward working relationship, making it easier for you to move fast and stay confident in your product.
Responsive Design
ASP.NET
CSS
TypeScript
Firebase
Angular
Microsoft SQL Server
React
C#
HTML
JavaScript
HTML5
Bootstrap
Database
.NET Core
Alex P.
Mumbai, India
$40/hr
5.0
6 jobs
I am a Senior Software Developer with 10 years of experience building high-performance desktop and web applications using the .NET ecosystem.
My core expertise is in WPF development (9 years), where I have delivered enterprise-grade and real-time applications, extensively using DevExpress for WPF (advanced grids, charts, dashboards, custom UI components, and performance optimization using MVVM).
I also have 2 years of experience with Blazor WebAssembly, building modern, component-based web applications, and 1 year of experience with ASP.NET Core Web API and .NET Aspire for developing and orchestrating scalable backend services.
I bring strong trading and financial domain knowledge, having worked on real-time systems involving live market data, high-frequency updates, and low-latency UI rendering — where accuracy, performance, and stability are critical.
I follow Test-Driven Development (TDD) and focus on:
Clean, maintainable architecture
Testable and scalable code
Reliable and predictable delivery
🔹 Key Skills
C# / .NET (10+ years)
WPF (MVVM, DevExpress, performance tuning)
Blazor WebAssembly
ASP.NET Core Web API
.NET Aspire
Test-Driven Development (TDD)
Real-time & trading systems
If you are looking for a reliable senior developer who understands both technology and business-critical systems, I’d be happy to discuss your project.
Windows Presentation Foundation
C#
Git
Desktop Application
SQL
Model View ViewModel
Windows Communication Foundation
DevExpress
.NET Core
TortoiseSVN
Blazor
WebAssembly
ASP.NET Web API
Vishesh S.
Mumbai, India
$25/hr
4.9
81 jobs
I specialise in building and securing high-performance protocols on Solana and Rust. My expertise spans smart contract development, security audits, DEXs, perpetual exchanges, advanced DeFi architectures, and custom trading/Telegram bots. Whether you need a secure audit, a cutting-edge DEX, or a lightning-fast trading bot, I deliver production-ready solutions with precision.
🔐 Core Expertise
• Rust & Solana Development – Advanced programs using Anchor & native Rust, zero-copy, PDAs, gas-efficient logic.
• Smart Contract Audits – Security-first approach with fuzzing, unit testing, formal verification patterns, and attack-surface analysis.
• DeFi Protocols – AMMs, concentrated liquidity, perps, lending/borrowing, staking, DAO governance.
• DEX & Perps Exchanges – Experience building DEX infrastructure and perpetual futures mechanisms.
• Trading Bots & Automation – High-performance Solana bots (snipers, arbitrage, volume generators), plus custom Telegram-integrated bots for trading and community tools.
🛠️ Full-Stack & Tooling
• Frontend: React, Next.js, TypeScript, Tailwind — seamless dApp UIs with wallet integrations (Phantom, Solflare, WalletConnect).
• Backend: Node.js/Express, Rust APIs, MongoDB/Postgres, Redis.
• Security & Testing: Anchor test suite, Mocha/Chai, fuzzing frameworks, formal verification techniques.
• Infra: AWS/DigitalOcean, Dockerized deployments, RPC optimization for high TPS workloads.
🌟 Track Record
• Zeru Finance – Fork of Aave with credit infrastructure + derivatives trading, launching soon on Testnet.
• DEXs on Solana – Built Solana-based decentralized exchanges with advanced trading features.
• Perpetual Exchange Modules – Inspired by GMX, with leverage trading and risk management.
• High-Performance Bots – Pump.fun clones, Raydium snipers, Telegram trading integrations, and arbitrage engines.
💡 Why Work With Me?
• Top Rated on Upwork – Consistent 5⭐ reviews & trusted long-term collaborations.
• Audit Mindset – I don’t just write contracts, I secure them — identifying vulnerabilities before they hit production.
• DeFi Specialist – Proven ability across AMMs, perps, DEXs, and staking/DAO mechanisms.
• End-to-End Delivery – From smart contracts to dApp frontend to production deployment.
⸻
✨ Let’s build secure, scalable, and innovative blockchain solutions — from audited smart contracts to next-gen trading infrastructure.
Web Development
Blockchain
DeFi
Solidity
Ethereum
React
DApp Development
Web3
Blockchain, NFT & Cryptocurrency
Smart Contract Development
Decentralized Exchange
Trading Automation
Rust
Solana
Telegram API
Deepak A.
Mumbai, India
$25/hr
5.0
20 jobs
I have 17 years of experience in designing and developing business oriented (cloud-based) secured, robust, scalable, high performance and interactive software solutions using legacy as well as modern frameworks, tools & technologies.
I have also been providing comprehensive infrastructure management, devops, build, deployment, maintenance and support services using on-premise and cloud platforms such as Azure, AWS and GCP.
I have been extensively working on API based development, integration and automations.
List of work done or clients I worked with:
- Eziway (Australia)
- Brainstorm Productions (USA)
- Contel (Israel)
- American Prime Lending (USA)
- grupo-core [dot] com/intranet/ (Spain)
- nanhikali [dot] org (India)
- THJA (USA)
- Living Space Estate Agents (UK)
- Tupperware India (USA-India)
- Votrite (USA)
- Optim Healthgroup LLC (https:// appstoremedia.blob.core.windows.net/media/Partners/Medical%20Information%20Records/brochureAOS415.pdf) (USA)
- Bridgestone EU (Europe)
C#
Microsoft SQL Server
ASP.NET Web API
ASP.NET Core
.NET Framework
Desktop Application
AI Agent Development
.NET Core
Microsoft Azure
VB.NET
AWS Development
API
IT Infrastructure
Project Management
Solution Architecture
Web Form
Jitendra J.
Mumbai, India
$30/hr
5.0
6 jobs
• 13+ years of extensive application development and experience in web using C#.NET related technologies
• .NET Core, XAMARIN.FORMS, MAUI, Blazor, UWP 10, Web API, Windows Phone7.8/8/10, 8.1(WinRT) App Store, WPF, XAML, ASP.NET MVC, XML, JSON, AJAX, JavaScript, Lazy Loading, TDD principles, LINQ, SVN, Team foundation server, Azure, Agile, Scrum
• Advanced understanding of object-oriented languages generally and strong understanding of functional languages such as MSSQL and Oracle.
• Experienced with using public web services and APIs such as Facebook SDK, Twitter REST API, Google Maps API.
• Familiar with application architecture best practices such as MVVM and cutting-edge techniques such as ORMs such as Entity Framework.
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