Senior QA Automation & Performance Test Engineer | 20+ Years of Experience
I'm a quality assurance professional with over two decades of experience across functional, e-commerce, mobile, security, API, and performance testing. I help teams ship reliable software faster by combining hands-on testing expertise with leadership in Agile environments.
What I bring to your project:
🔹 Automation & API Testing — Skilled in Postman, JMeter, and Cypress for API and automation testing, with hands-on TypeScript scripting experience for CRM and enterprise platforms.
🔹 Performance Testing — Deep expertise in JMeter, LoadRunner (Professional & Cloud), NeoLoad, VSTS, Rigor, Datadog, AppDynamics, and Lighthouse. I've built performance test strategies from the ground up, defined industry-standard thresholds, and led performance architecture for enterprise clients.
🔹 Leadership & Agile Delivery — Proven track record as a Scrum Master, Release Train Engineer, Test Lead, and Product Owner in SAFe Agile environments. I've led teams of 10+, managed backlogs, removed sprint impediments, and kept delivery on schedule and within budget.
🔹 Training & Mentorship — I've trained teams on performance tools and Agile/Scrum practices, and mentored junior testers throughout my career.
Recent highlights:
Currently leading automation, API, and performance testing (Postman, JMeter, Cypress) at AMCS Group
Served as Test Lead for a team of 10 while performing API and performance testing for Shopify/Shippit platforms at Unient
Acted as Performance Architect and Product Owner at Accenture, training teams on enterprise-grade performance tools
Built performance testing frameworks and automation strategies across companies like Sitecore CRM, Lexmark, and Alliance Software
Apache JMeter
AppDynamics
Test Results & Analysis
Software QA
Adobe Inc.
Testing
Report
Software Testing
LoadRunner
Integration Testing
Bug Reports
Sprint Planning
System Monitoring
Selenium WebDriver
Report Writing
Muneeb I.
Rahim Yar Khan, Pakistan
$60/hr
5.0
7 jobs
I am a Windows Systems Software Engineer with 5+ years of experience in Windows kernel development, OS internals, Windows application development, low-level programming, C++, reverse engineering, endpoint security, DLP, MDM, and cybersecurity.
I help companies design, develop, debug, and optimize secure, reliable, and high-performance Windows software ranging from desktop applications and system utilities to kernel-mode drivers, monitoring solutions, and enterprise security products.
My expertise includes:
• Windows Kernel Development (KMDF, WDM, Minifilter, WFP)
• Windows Internals & Low-Level System Programming
• Windows Desktop Applications & System Utilities
• C/C++ Systems Programming
• Reverse Engineering & Windows API
• Endpoint Security, DLP & MDM Solutions
• Process, File System & Registry Monitoring
• Driver Debugging, BSOD Analysis & WinDbg
• Driver Signing, HLK, WHQL & Production Deployment
• IOCTL, IPC, Shared Memory & Named Pipes
• Multi-threaded & Performance-Critical Software
• Network Filtering & System Monitoring
• Virtual Device Drivers (Audio, Display & Custom Devices)
• Windows Services & Background System Components
• Linux Kernel Modules & Cross-Platform Systems Programming
• Rust System Software & Firmware Development
Recent projects include Windows virtual audio drivers, file system MiniFilter drivers, WFP-based network filtering solutions, smart-card filter drivers, virtual display drivers, kernel telemetry systems, process monitoring tools, Windows print subsystem integration, Rust firmware migration, embedded communication systems, and other performance-critical system software. These projects span operating system components, hardware integration, security products, and production-ready Windows solutions.
I focus on building software close to the operating system, where performance, reliability, security, and maintainability matter most. Whether it's extending Windows functionality, developing custom drivers, building desktop applications, integrating hardware, or solving complex system-level challenges, I deliver clean architecture, production-ready code, and long-term maintainable solutions.
If you're looking for an engineer who understands Windows from user mode to kernel mode and can take ownership of complex C++, Windows, cybersecurity, or low-level systems projects, I'd be happy to discuss your requirements.
C++
Windows App Development
System Programming
Low-Level Programming
Software Debugging
Reverse Engineering
Virtual Desktop Infrastructure
Kernel Oops
Desktop Application
Query Debugging
Cybersecurity Management
Kernel
Driver Development
Computing & Networking
C#
C
OS Security
Network File System Implementation
Daniel D.
Dragichevo, Bulgaria
$40/hr
4.9
80 jobs
I build production AI systems and the software they run on. 15 years in .NET and the Microsoft stack, with the last two focused on shipping real AI: Claude-powered agents, MCP servers, RAG pipelines and workflow automation that businesses depend on daily.
AI AND LLM ENGINEERING
- Production multi-agent Claude systems: intent routing, structured outputs, human approval gates, cost tracking, audit logging
- MCP servers exposing business operations as controlled, callable tools with real authorization boundaries
- RAG and vector search (Postgres/pgvector) with strict citation discipline, built to say "not found" rather than invent
- OCR and document extraction pipelines (Mistral, Claude) turning messy PDFs into structured data
- AI customer support and enquiry bots answering from a knowledge base, with escalation to humans
- Browser and workflow automation (Skyvern, Playwright), Twilio AI calling, email agents via Microsoft Graph
- AI-first development with Claude Code as a daily driver, with the discipline to review and verify everything that ships
.NET AND ARCHITECTURE
- .NET Framework through .NET 10: ASP.NET Core, Blazor, MVC, Web API, Minimal APIs, EF Core
- Multi-tenant SaaS architecture, event sourcing, row-level security, immutable audit trails. Sole architect on an FCA-regulated platform that ran seven years in production
- Cloud: Azure (Functions, Key Vault, Service Bus, Event Grid) and GCP (Cloud Run, Cloud SQL, Pub/Sub, Secret Manager)
- Legacy modernization: Web Forms, Classic ASP, VB.NET and .NET Framework carried to modern .NET, using strangler-fig so systems stay live throughout
FRONTEND, DESKTOP AND MOBILE
- Angular, React, TypeScript, Next.js, Blazor, Tailwind, D3
- WPF, WinForms, Windows services and workers, UDP/TCP servers
- MAUI and Flutter mobile apps, published Chrome extensions with 200,000+ users and Featured badges on the Chrome Web Store
INTEGRATIONS
- Stripe, Microsoft Graph, Shopify, Xero, QuickBooks, HubSpot, Klaviyo, eBay, Epic and Cerner FHIR, HAPI FHIR, and a long list of others. Bridging messy third-party systems behind clean internal contracts is a large part of what I do.
I work solo, take projects end to end, and prefer long-term engagements. Most of mine have run multi-year. Available immediately, fully remote, EET (UTC+2) with full UK and European overlap. Also partial overlap with US EST hours.
Portfolio: codebydaniel.net
JavaScript
C#
.NET Core
.NET Framework
ASP.NET Web API
ASP.NET MVC
Selenium WebDriver
Microsoft SQL Server
Microsoft Azure
Windows Presentation Foundation
Windows Forms
Blazor
Data Scraping
Bot Development
ASP.NET Core
Artificial Intelligence
Claude
Robotic Process Automation
Vishal G.
Bengaluru, India
$25/hr
5.0
10 jobs
Looking for a Full-Stack .NET Developer, AI Specialist, and Automation Engineer who handles everything from complex backend architecture to sleek React frontends and CAD plugins?
Finding a reliable developer is hard; finding a Product Engineer who understands system design, automated workflows, and business ROI is even rarer. I bridge that gap by combining deep technical expertise with a consultative mindset.
Whether you need custom AI/ML integrations, SolidWorks CAD automation, or high-throughput .NET enterprise platforms, I engineer solutions built on Clean Architecture, microservices, and Test-Driven Development (TDD) to ensure scalable, maintainable, and cost-effective code.
What I Build & Automate:
AI & Computer Vision Systems: Custom Machine Learning pipelines, RAG (Retrieval-Augmented Generation) applications, and real-time OpenCV image/video processing.
CAD & Desktop Automation: Custom SolidWorks API plugins (C#/.NET), Office Add-ins (VSTO & Office.js for Outlook, Excel, OneNote), and WPF desktop tools.
Full-Stack Web & APIs: High-performance RESTful APIs, asynchronous microservices, and modern, responsive React dashboards.
Core Technical Stack & Expertise
AI, Machine Learning & Data: Python, OpenCV (Computer Vision), RAG / LLM Integration, Machine Learning Models, Apache Airflow, Streamlit
CAD & Extension Engineering: SolidWorks API (C#), VSTO, Office.js, Outlook & Excel Add-ins, System Automation
Backend & Cloud Architecture: C#, .NET 8 / .NET Core, FastAPI, PostgreSQL, SQL Server, Microservices, RESTful APIs
Frontend & Mobile: TypeScript, JavaScript, React, .NET MAUI, WPF, Modern UI/UX
DevOps & Infrastructure: Microsoft Azure, Docker, Apache Kafka, CI/CD Pipelines, Git
Digital Wallet Integrations: Apple Wallet Pass, Google Wallet API
I pride myself on transparent Agile communication and delivering logic that is as clean as it is powerful. Let’s connect to discuss your project requirements and turn your technical vision into a production-ready reality.
C#
.NET Core
Microsoft Office
React
Python
Machine Learning
Data Science
AI Implementation
Robotics
Design-to-Code
Data Engineering
Data Extraction
Muhammad Aamir M.
Islamabad, Pakistan
$20/hr
5.0
8 jobs
I'm a Microsoft Certified system administrator specializing in Microsoft Azure, Microsoft 365, Windows Server, and hybrid cloud solutions for small and medium-sized businesses. I build secure, reliable IT infrastructures that keep downtime low and operations running smoothly.
My Azure work covers VM and network deployment (VNets, Load Balancers, NSGs, Storage Accounts), identity and access management with Microsoft Entra ID (RBAC, Conditional Access, MFA), and proactive monitoring via Azure Monitor and Log Analytics. I also handle backup and disaster recovery using Acronis, Veeam, and Azure Backup/Site Recovery.
On Microsoft 365, I manage full tenant administration, Exchange Online, SharePoint/OneDrive, Teams, user/license provisioning, plus security hardening through Conditional Access, MFA, and Defender for Office 365, whether it's a fresh setup, an Exchange migration, or ongoing management.
WHAT I OFFER:
✅ Microsoft Azure: Virtual Machines, Virtual Networks, hybrid integration, networking (Load Balancers, NSGs, Azure Firewall), Storage Accounts, FSLogix and Azure Virtual Desktop (AVD)
✅ Azure Identity & Security: Microsoft Entra ID (Azure AD), RBAC, Conditional Access, MFA, and Defender for Cloud
✅ Azure Monitoring: Azure Monitor, Log Analytics, and Application Insights for proactive issue detection
✅ Windows Server (2016–2025): installation, configuration, and administration
✅ Active Directory & Hybrid AD: user management, group policies, Azure AD Connect/sync, and security hardening
✅ Virtualization (Hyper-V/VMware): setup, migration, and optimization of virtual environments
✅ Backup & Disaster Recovery: Acronis, Veeam, and Azure Backup/Site Recovery configuration, monitoring, and testing
✅ Microsoft 365 Administration: tenant setup and management, Exchange Online, SharePoint & OneDrive, Teams, user provisioning and licensing
✅ Microsoft 365 Security: Conditional Access, MFA, Defender for Office 365, and compliance basics
✅ Storage & RAID Configuration: SAN, NAS, and storage health monitoring
✅ Security Hardening & Patch Management: OS, firmware, and software updates
✅ Network Support: DrayTek router setup, VPN configuration, and troubleshooting
✅ Remote IT & Server Support: fast issue resolution and proactive monitoring
CERTIFICATIONS:
🎯 Microsoft Certified: Azure Administrator Associate
🎯 Microsoft Certified: Microsoft 365 Administrator
🎯 Microsoft Certified: Azure AI Engineer Associate
🎯 Microsoft Certified: Windows Server Hybrid Administrator Associate
🎯 HPE ProLiant & Blade Server Service and Solution Qualification
WHY CHOOSE ME?
🔹 4+ years of professional experience in Microsoft Azure and Windows Server environments
🔹 Proven expertise across Azure infrastructure, Microsoft 365 administration, Active Directory, backup, and disaster recovery
🔹 Reliable, fast, and proactive problem-solving
🔹 Client-focused approach ensuring long-term IT stability and security
I specialize in Azure hybrid solutions, Microsoft 365 management, IT support, Windows Server administration, virtualization, and backup management.
Let's optimize and secure your on-prem and cloud IT infrastructure to ensure seamless operations for your business 🚀
Microsoft Azure
Office 365
Windows Server
Microsoft Active Directory
Microsoft Hyper-V Server
Microsoft SCVMM
DHCP
Cluster Computing
Acronis
VMware Administration
Microsoft Windows PowerShell
GPO
System Administration
IT Infrastructure
Cloud Computing
Server Administration
Microsoft Azure Administration
Microsoft Intune
VMware vSphere
Technical Support
Zeeshan K.
Indore, India
$35/hr
5.0
8 jobs
Are you looking for a senior .NET developer who can turn complex business requirements into reliable, scalable software?
I’m Zeeshan, a full-stack .NET and Cloud Developer with 🏆 10+ years of experience building SaaS products, modernizing legacy systems, and delivering business-critical applications. I help companies build secure ASP.NET/C# platforms, REST APIs, SQL Server solutions, AWS deployments, SharePoint workflows, and low-risk batch-data migrations.
I also understand the requirements of regulated applications, including 21 CFR Part 11 considerations such as audit trails, role-based access, electronic records, validation, and data integrity.
*What I Can Deliver*
✅ End-to-end SaaS application development—from architecture to deployment
✅ Scalable ASP.NET and C# web applications
✅ Secure REST APIs and third-party integrations
✅ SQL Server architecture, query optimization, and database maintenance
✅ Batch-data migrations with validation and minimal disruption
✅ AWS deployment, infrastructure, monitoring, and cost-aware operations
✅ SharePoint solutions that streamline collaboration and business processes
✅ Legacy .NET modernization to improve performance, stability, and maintainability
✅ Software features for 21 CFR Part 11–aligned regulated environments
Technical Focus
Backend: C#, .NET, ASP.NET, REST APIs, integrations
SaaS & Cloud: multi-tenant application architecture, AWS deployment, monitoring, and scalability
Data: SQL Server design, optimization, migrations, validation, and data integrity
Enterprise & Compliance: SharePoint, role-based access, audit trails, and regulated-system workflows
I focus on the business problem first, then deliver practical, maintainable solutions with clean code, transparent communication, and long-term reliability in mind.
If you need a SaaS product, a secure .NET application, AWS deployment, SQL optimization, SharePoint development, a compliant workflow, or a complex migration, let’s discuss your project.
C#
Desktop Application
Desktop Application Bug Fix
Desktop Application Improvement
Web Application Development
CSS
Raspberry Pi Firmware
Raspberry Pi
UART
ARM Microcontroller
ARM Cortex-M
Microsoft Windows PowerShell
JavaScript
AWS Lambda
Machine Vision
Industrial Automation
Windows Presentation Foundation
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