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Sajjad A.

Islamabad, Pakistan

$30/hr
5.0
1 jobs

I'm a Software Architect & AI Engineer with 6+ years of experience designing and building scalable, enterprise-grade software solutions. I help startups, SaaS companies, and enterprises build intelligent applications, modernize legacy systems, integrate Generative AI, and architect cloud-native platforms that scale. My expertise combines System Design, Software Architecture, .NET, Python, AI, and Cloud Engineering, enabling me to deliver complete solutions—from architecture and backend development to AI integration, cloud deployment, and enterprise platform integrations. Over the years, I've delivered enterprise applications, AI-powered platforms, multi-tenant SaaS products, backend systems for web and mobile applications, and cloud-native solutions used by businesses across multiple industries. ━━━━━━━━━━━━━━━━━━━━━━ 🚀 WHAT I BUILD ━━━━━━━━━━━━━━━━━━━━━━ ✔ Enterprise Web Applications ✔ Backend APIs for Mobile Applications ✔ Backend-as-a-Service (BaaS) Solutions ✔ AI-Powered Applications ✔ AI Agents & Multi-Agent Systems ✔ Retrieval-Augmented Generation (RAG) Platforms ✔ AI Chatbots & Knowledge Base Assistants ✔ Multi-Tenant SaaS Platforms ✔ ASP.NET Core APIs ✔ Cloud-Native Applications ✔ Workflow Automation ✔ Microservices ✔ Legacy .NET Modernization ━━━━━━━━━━━━━━━━━━━━━━ 🏗 SYSTEM DESIGN & SOFTWARE ARCHITECTURE ━━━━━━━━━━━━━━━━━━━━━━ I specialize in designing software architectures that are secure, scalable, maintainable, and production-ready. My experience includes: • Multi-Tenant SaaS Architecture • Clean Architecture • Domain-Driven Design (DDD) • SOLID Principles • Microservices • Modular Monoliths • Event-Driven Architecture • Enterprise REST APIs • Authentication & Authorization • Database Design • High-Performance Backend Systems • Distributed Systems • Cloud-Native Architecture • AI Platform Architecture • AI Agent Architectures • RAG Pipelines • Vector Database Design ━━━━━━━━━━━━━━━━━━━━━━ 🤖 AI & GENERATIVE AI ━━━━━━━━━━━━━━━━━━━━━━ I build intelligent applications powered by modern Large Language Models. My experience includes: • AI Agents • Multi-Agent Systems • Retrieval-Augmented Generation (RAG) • Semantic Search • Vector Databases • Embeddings • Prompt Engineering • AI Workflow Automation • Enterprise Knowledge Bases • AI Chatbots • Intelligent Document Processing • OpenAI • Claude • Groq • Azure AI Foundry • AWS Bedrock • Semantic Kernel • LangChain • LangGraph • CrewAI ━━━━━━━━━━━━━━━━━━━━━━ 🔗 ENTERPRISE & PLATFORM INTEGRATIONS ━━━━━━━━━━━━━━━━━━━━━━ I have integrated enterprise software with payment gateways, authentication providers, communication platforms, AI services, and cloud infrastructure to build seamless business solutions. Payment Gateways • Stripe • Mollie • Klarna • PayPal • Subscription Billing • Webhooks Authentication & Identity • Clerk • Firebase Authentication • OAuth 2.0 • OpenID Connect • JWT Authentication • Social Authentication Communication & Collaboration • WhatsApp Business API • Slack • Microsoft Teams • Telegram Bots • Discord Bots • Twilio Real-Time Systems • SignalR • WebSockets • Firebase Cloud Messaging (FCM) • Push Notifications Messaging & Event Streaming • RabbitMQ • Apache Kafka • Azure Service Bus • Background Workers Cloud & AI Platforms • Azure • Azure AI Foundry • Azure OpenAI • AWS • AWS Bedrock • Firebase • Docker • CI/CD Pipelines ━━━━━━━━━━━━━━━━━━━━━━ 📱 MOBILE BACKEND EXPERTISE ━━━━━━━━━━━━━━━━━━━━━━ I have designed and developed secure backend infrastructure for Android and iOS applications, providing scalable APIs and cloud services that power modern mobile experiences. My experience includes: • REST APIs for Mobile Apps • Authentication & User Management • Push Notifications • Real-Time Messaging • File Upload & Media Management • Payment Processing • Chat Systems • Location-Based Services • Offline Synchronization • Firebase Integration • Backend-as-a-Service (BaaS) • API Security • Role-Based Access Control • Cloud Storage • Admin Dashboards ━━━━━━━━━━━━━━━━━━━━━━ 💻 CORE TECHNOLOGIES ━━━━━━━━━━━━━━━━━━━━━━ Backend • ASP.NET Core • C# • .NET • Python • FastAPI • Entity Framework Core • SQL Server • PostgreSQL • Redis Frontend • Blazor • React • Next.js Cloud • Microsoft Azure • Amazon Web Services (AWS) • Azure DevOps • Docker • GitHub Actions • CI/CD ━━━━━━━━━━━━━━━━━━━━━━ ✅ WHY CLIENTS WORK WITH ME ━━━━━━━━━━━━━━━━━━━━━━ ✔ 6+ Years of Professional Software Engineering Experience ✔ Software Architecture & System Design Expertise ✔ Production-Ready .NET & AI Solutions ✔ Strong Enterprise Development Background ✔ Clean, Scalable & Maintainable Code ✔ Excellent Communication & Transparency ✔ Reliable Delivery & Long-Term Collaboration I architect scalable, production-ready .NET and AI solutions that solve real business problems. Let's build software that delivers measurable results.

  • .NET Stack
  • Generative AI
  • AI Agent Development
  • Claude
  • Retrieval Augmented Generation
  • C#
  • Azure DevOps
  • Python
  • FastAPI
  • Vector Database
  • LangChain
  • Next.js
  • ASP.NET
  • PHP
  • WordPress Development
  • Firebase
  • Push Notifications
  • API
  • Database Administration
  • SaaS Development
Ayoub B.

Argenteuil, France

$70/hr
5.0
22 jobs

I’m a senior creative engineer specializing in JUCE/DSP, real-time 3D, Qt/HMI, AI systems, FFmpeg workflows, and full-stack product development. I build production-ready software across audio plugins, desktop apps, WebGL/XR experiences, AI-powered tools, and media-processing pipelines. My strength is combining strong engineering with design precision, so the final product is not only functional, but fast, polished, and easy to use. Core skills include: Audio/DSP: JUCE, C++23, VST3, AU, CLAP, FFmpeg, custom plugin GUIs 3D/XR: Three.js, WebGL, WebXR, Unity, OpenGL, Blender AI/ML: Python, PyTorch, OpenCV, RAG, FastAPI, automation workflows Full-Stack: Next.js, React, Electron, Node.js, Hono.js, Cloudflare, PostgreSQL, Docker I’m a good fit if you need a reliable technical partner for complex creative software, including audio tools, 3D viewers, AI applications, video-processing systems, or custom desktop/web platforms.

  • C++
  • C#
  • TypeScript
  • Audio Engineering
  • Audio & Music Software
  • Digital Signal Processing
  • AI Consulting
  • Python
  • FFmpeg
  • Next.js
  • PostgreSQL
  • Three.js
  • WebGL
  • Unity
  • Blender
Wajid A.

Lahore, Pakistan

$40/hr
5.0
7 jobs

Computer Vision Engineer specializing in real-time detection systems across surveillance AI, manufacturing inspection, medical imaging, and smart city infrastructure — deployed to production. I build end-to-end: camera input, model training, TensorRT optimization, edge or cloud deployment, and backend integration. Not prototypes. Working systems. WHAT I HAVE SHIPPED: Multi-tenant AI surveillance platform with 8 real-time detection agents — intrusion, loitering, occupancy, vehicle counting, LPR, fire/smoke detection, entry after hours, and late checkout. YOLO11s + PaddleOCR on RunPod GPU, RTSP stream management via MediaMTX, FastAPI backend on DigitalOcean, CI/CD via GitHub Actions with a self-hosted runner. Supabase for auth and Postgres. Full production deployment. Spine X-ray segmentation system — 25-class vertebrae labeling (C1 through L5) with automated clinical metric extraction: disc height, segment angle, neutral listhesis, interspinous gap. Dual architecture: ResNet34 U-Net baseline and a custom ConvNeXt-Tiny encoder with CBAM attention trained on real X-rays and synthetic DRR data from CT volumes. 0.92 Dice on full-spine segmentation. Real-time defect detection on NVIDIA Jetson Xavier for a food and beverage production line. TensorRT FP16 inference, zero cloud dependency, PLC integration for automated pass/fail. Defect catch rate improved significantly over manual baseline. LiDAR-camera sensor fusion pipelines for smart city traffic monitoring — ROS, DeepStream, NVIDIA Jetson, production-deployed infrastructure. CORE CAPABILITIES: → Detection, segmentation, tracking: YOLO variants, SAM2, custom PyTorch → TensorRT optimization: FP16/INT8 quantization, ONNX export, engine serialization → Edge deployment: Jetson Nano, NX, Orin, Xavier — hardware bring-up to production → Medical imaging: U-Net architectures, multi-class segmentation, DICOM, clinical metrics → Surveillance AI: multi-agent detection, RTSP streams, LPR, event-based alerting → Industrial integration: FastAPI, MQTT, EMQX, Azure IoT Hub, AWS S3, Docker, Supabase INDUSTRIES: Manufacturing quality control — food and beverage, general production lines Surveillance and security — multi-camera platforms, license plate recognition, event detection Medical imaging — vertebral segmentation, clinical measurement pipelines Smart city and traffic — LiDAR-camera fusion, intrusion detection, infrastructure monitoring I communicate clearly, surface blockers early, and deliver systems that run reliably in your environment.

  • Computer Vision
  • Deep Learning
  • PyTorch
  • OpenCV
  • TensorRT
  • NVIDIA Jetson
  • Edge AI
  • CUDA
  • FastAPI
  • MQTT
  • Docker
  • Vision-Language Model
  • Optical Character Recognition
  • Object Detection
  • Object Tracking
  • YOLO
Mohammad Shadab S.

New Delhi, India

$20/hr
5.0
44 jobs

🌍 IAAP CPWA-Certified Accessibility Consultant & Developer specializing in WCAG 2.2 AA audits, ADA compliance, accessibility remediation, and accessible frontend development. I help businesses identify and fix accessibility barriers across websites, SaaS platforms, WordPress, React, Shopify, and enterprise applications through manual testing, screen reader validation, keyboard accessibility improvements, and developer-focused remediation support. With 8+ years of hands-on accessibility experience, I work with organizations to improve usability for people with disabilities while aligning digital products with WCAG, ADA, Section 508, and AODA accessibility requirements. ⸻ 🧩 Certifications & Credentials ✔ IAAP Certified Professional in Web Accessibility (CPWA) ✔ IAAP Web Accessibility Specialist (WAS) ✔ IAAP Certified Professional in Accessibility Core Competencies (CPACC) ✔ JAWS Screen Reader Certified ✔ DHS Section 508 Trusted Tester ⸻ 💼 Accessibility Services ✅ Accessibility Audits & Compliance Testing • WCAG 2.1 / 2.2 accessibility audits (A, AA, AAA) • ADA, Section 508, and AODA compliance reviews • Manual accessibility testing and automated validation • Screen reader testing using JAWS, NVDA, VoiceOver, and TalkBack • Keyboard-only accessibility testing • Focus management, zoom, reflow, and responsive accessibility testing • Accessibility reports with developer-ready remediation guidance • VPAT support and accessibility documentation ⸻ ✅ Accessibility Remediation & Frontend Development • Accessibility remediation for existing websites and applications • Code-level WCAG fixes and accessibility improvements • Semantic HTML and ARIA implementation • Accessible forms, navigation, modals, tables, and UI components • Keyboard accessibility and screen reader compatibility fixes • Accessible React, Next.js, WordPress, and custom frontend applications • Accessibility-first frontend development practices Technologies: React • Next.js • JavaScript • TypeScript • HTML5 • CSS3 • WordPress • PHP • Node.js ⸻ ✅ CMS & eCommerce Accessibility • WordPress accessibility remediation and development • Shopify accessibility improvements • Accessible theme and component implementation • WCAG-compliant frontend development for CMS and eCommerce platforms ⸻ ✅ Accessibility Tools & Testing Expertise Experienced with: JAWS • NVDA • VoiceOver • TalkBack • Axe DevTools • WAVE • Lighthouse • ARC Toolkit • Accessibility Insights ⸻ ✅ Accessibility Training & Consulting • Accessibility guidance for developers, designers, and QA teams • WCAG and ARIA best practices training • Accessibility support during development and QA cycles • Long-term accessibility consulting and remediation planning ⸻ 💡 Why Clients Work With Me • 8+ years of practical accessibility and frontend development experience • Strong combination of accessibility consulting + implementation expertise • Experience across enterprise, SaaS, finance, education, eCommerce, and government projects • Clear communication and detailed developer-friendly reporting • Focus on sustainable accessibility improvements, not just compliance checklists • Ability to both identify accessibility issues and implement effective remediation solutions ⸻ 📩 If you need a WCAG accessibility audit, ADA compliance support, accessibility remediation, or accessible frontend development, feel free to message me to discuss your project requirements.

  • React
  • HTML
  • WordPress
  • Web Development
  • PHP
  • JavaScript
  • CSS
  • Front-End Development
  • Web Content Accessibility Guidelines
  • Web Accessibility
  • Section 508
  • Web Design
  • TypeScript
  • Accessibility Testing
Dipen P.

Ahmedabad, India

$38/hr
4.6
1,519 jobs

Completed 50+ world-class 3D product configurators across various industries. With 20 years of experience in computer graphics and computational geometry, I help businesses turn complex 3D and visual data into interactive, production-ready software — from AI-powered computer vision pipelines to real-time 3D configurators and digital twins. On the 3D configurator and e-commerce side, I create web-based experiences where users can load, customize, and augment products in real-time using WebGL/Three.js and modern JavaScript, then purchase directly through the website — turning static product pages into interactive sales tools. My technical foundation covers both precision CAD work (STEP/IGES) and mesh-based pipelines (STL/OBJ), using geometry kernels like Parasolid, Open Cascade, CGAL, and IGL, graphics libraries like VTK and OpenGL, and languages including C++, C++/CLI, C#, and JavaScript, with UI frameworks like Qt and MFC for desktop tools. On the computer vision and AI side, I build systems that extract measurements, detect defects, and verify manufacturability directly from images, scans, or CAD models — including photogrammetry pipelines that reconstruct accurate 3D models from real-world photos for digital twin and inspection use cases. Whether the challenge is reconstructing real-world geometry through photogrammetry, building a digital twin that mirrors physical assets, training a vision model to inspect or measure parts, or shipping a configurator that helps customers buy with confidence, I bring deep geometry expertise together with modern AI and graphics tooling to deliver solutions that solve real engineering and business problems.

  • WebGL
  • React
  • D3.js
  • C++
  • Unreal Engine
  • TypeScript
  • Next.js
  • AR & VR
  • CAD
  • Lidar
  • Computer Vision
  • GIS
  • Three.js
  • JavaScript
  • AI Agent Development
  • Ecommerce
Syed Askar G.

Lahore, Pakistan

$25/hr
5.0
14 jobs

"A highly skilled and dependable full-stack engineer with a rare combination of technical expertise and deep healthcare domain knowledge." — Dean, US client (Mental Health Practitioner) I engineer HIPAA-compliant healthcare platforms — telehealth, EHR/EMR-integrated workflows, e-prescribing, and AI-driven clinical systems — built to run reliably in production, not just demo well. 4+ years, US providers and digital-health startups. Selected work Insted — full home-healthcare platform (scheduling, clinical docs, billing) on .NET / Angular / Azure, 3 years in production. RAG email automation — AI drafting over a clinical inbox with hierarchical, category-guided retrieval (Vertex AI embeddings + pgvector) and automated PHI redaction via Cloud DLP. FHIR R4 patient-matching for clinical trials — automated eligibility against live EHR data. Athenahealth ↔ Google Calendar bidirectional appointment sync with conflict handling. Integrations & interoperability EHR/EMR (Athenahealth, Epic, NextGen, Greenway, eClinicalWorks, Healthie, OpenEMR) · e-prescribing (Surescripts, DoseSpot, RTPB) · clearinghouse & payer (Availity, Aetna, eligibility + prior-auth) · labs (Labcorp, Quest) · standards (HL7 v2/v3, FHIR R4, ICD-10/CPT). Stack .NET Core / C#, FastAPI, Node.js · Angular, React · SQL Server, MongoDB, pgvector · Azure (App Services, Service Bus, CI/CD), Docker · OAuth2 / OpenID Connect, immutable audit logging. How I work I own design through delivery personally — no outsourcing, no handoffs. I architect for the part most teams underestimate: operational reliability, scale, and compliance you can actually run day to day. HIPAA and OWASP-advanced certified. Industries Served Dental Mental Health PCPs Administration Building or scaling a healthcare platform or SAAS — EHR integration, e-prescribing, insurance workflows, or HIPAA compliance? Let's talk.

  • Web Development
  • JavaScript
  • Angular
  • Database
  • Front-End Development
  • Back-End Development
  • Generative AI
  • .NET Core
  • HIPAA
  • EMR Data Entry
  • Athena Software Penelope
  • React
  • Node.js
  • PostgreSQL
  • MongoDB

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