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Hi, This is Ibtisam, a seasoned Full Stack Developer with 5+ years of experience delivering robust, scalable, and secure applications across a wide range of industries. I bring hands-on expertise in Java, .NET, Liferay, and both modern and enterprise tech stacks to solve complex backend and full-stack challenges. 🔧 What I Specialize In: ✅ Java, Spring & Microservices Architecture Spring Boot, Spring MVC, Spring Security, Spring Data JPA, Spring Cloud RESTful API design, authentication (JWT, OAuth2), and scalable microservices Dockerized deployments, CI/CD pipelines, SSL/TLS integration ✅ .NET Core Development REST APIs, Entity Framework, ASP.NET MVC Modular enterprise systems with cloud-native support ✅ Liferay Development & Upgrade Liferay DXP/CE customization, Service Builder, OSGi modules Portal upgrades, plugin migration, role/permission-based content management ✅ Frontend Technologies ReactJS, Angular, HTML5, CSS3, Bootstrap Modern, responsive UI design integrated with secured APIs ✅ Search & Indexing Systems Deep experience with Elasticsearch and Apache Solr Integrated search with highlighting, filtering, faceting, and analytics ✅ Databases & Cloud Infrastructure MySQL, PostgreSQL, MongoDB, Redis AWS, Azure, Google Cloud Tomcat, JBoss, IIS server configurations and optimizations 🛠️ Tech Stack at a Glance: Languages: Java, C#, SQL, JavaScript, TypeScript Frameworks: Spring Boot, Spring Framework, .NET Core, ReactJS, Angular Databases: MySQL, PostgreSQL, MongoDB, Redis Search: Elasticsearch, Apache Solr Cloud: AWS, Azure, Google Cloud Servers: Tomcat, JBoss, IIS Tools: Docker, Jenkins, GitHub Actions, Jasper Reports IDEs: IntelliJ IDEA, Eclipse, Liferay Developer Studio, VSCode, PyCharm Agile Practices: Scrum, Kanban, CI/CD I believe in clean, testable code, timely delivery, and long-term partnerships built on trust and transparency. Whether you're modernizing legacy systems, building APIs, or scaling microservices — I'm ready to jump in. 📩 Let’s connect — I’m available for interviews, technical assessments, and long-term collaboration. Thanks, Ibtisam Full Stack Developer, Java Developer, Spring Boot, Spring Security, Spring Data JPA, Microservices, REST APIs, .NET Developer, .NET Core APIs, Entity Framework, ReactJS, Angular, Liferay Developer, Liferay Upgrade, MySQL, PostgreSQL, MongoDB, Redis, Elasticsearch, Solr, Tomcat, JBoss, IIS, AWS, Azure, Google Cloud, Docker, Kubernetes, CI/CD, OSGi, Spring Cloud, API Security, Responsive UI, Cloud-Native Development, Custom Web Portals, Jasper Reports

I am a Senior Healthcare Software Architect with expertise in building HIPAA compliant secure, scalable, and compliant digital health solutions. Navigating the intersection of healthcare and technology requires more than just coding skills, it requires a deep understanding of HIPAA compliance, data security, and clinical workflows. I specialize in developing end-to-end healthcare ecosystems that empower providers and improve patient outcomes. With a focus on security-first development, I help healthcare startups and established practices build robust digital tools that meet the highest regulatory standards. 🛠 Core Services & Expertise: HIPAA-Compliant Portals: Custom-built Patient and Practitioner portals with secure messaging, scheduling, and billing. EHR/EMR Integrations: Seamless interoperability with major systems (Epic, Cerner, Allscripts) using HL7 and FHIR standards. Remote Patient Monitoring (RPM): Building solutions that track real-time patient data and integrate directly into provider dashboards. Telehealth Solutions: Secure video consultations and asynchronous care platforms. Healthcare Data Security: Implementation of AES-256 encryption, MFA, and comprehensive audit logs. 🚀 Why Work With Me? Compliance by Design: I don’t just "add security" at the end; I build compliance into the architecture from day one. User-Centric Workflows: I understand the unique needs of clinicians (reducing burnout) and patients (improving engagement). Scalable Architecture: My solutions are built to grow with your practice or user base without compromising performance.

Salesforce Developer & Architect (9X Certified) | Health Cloud, Financial Services Cloud, Sales & Service Cloud | 11,000+ Upwork Hours | Top Rated Plus | 100% Job Success I help companies design, build, and scale high-performing Salesforce systems including Salesforce Health Cloud, Financial Services Cloud, Sales Cloud and Service Cloud implementations using Apex, LWC, Flows and complex API integrations. From startups to enterprise teams, I deliver scalable CRM solutions that improve efficiency, automate workflows, and drive revenue. What I Specialize In Salesforce Clouds: Health Cloud, Financial Services Cloud, Sales Cloud, Service Cloud, Experience Cloud Development: Apex, LWC, Triggers, Batch Jobs, Visualforce Automation: Flows, Process Builder, Approval Processes Integrations: HubSpot, NetSuite, Stripe, REST/SOAP APIs Architecture: Scalable CRM design, data modeling, system optimization Data & Analytics: Migration, cleanup, deduplication, reporting & dashboards RevOps & GTM: Salesforce-driven GTM engineering, sales ops automation, AI-assisted development with tools like Claude for faster, cleaner code delivery 🏆 9X Salesforce Certified (Architect-Level Expertise) Application Architect | Sharing & Visibility Architect | Data Architect | Platform Developer I & II | App Builder | Administrator | Marketing Cloud | Pardot (Account Engagement) | AI Associate 🔗 Integration Expertise CRM & Marketing: HubSpot, Pardot, Campaign Monitor Accounting: QuickBooks E-commerce: Shopify, WooCommerce, WordPress Payments: Stripe, PayPal Communication: Twilio, DocuSign, FormAssembly Systems: NetSuite, SAP, Azure DevOps, Skyvia, DrChrono 🏢 Industry Experience Healthcare / Health Cloud: Dietitian Live, Cenegenics Finance & Banking / Financial Services Cloud: Reliant Funding, Wintrust Bank, Finagy Legal: Salesforce CRM builds for law firms (case & client management) Butler MacDonald E-commerce & Retail Real Estate & Education Media: The Philadelphia Inquirer ⭐ Why Clients Choose Me 11,000+ hours of proven Salesforce delivery 75+ successful Salesforce implementations across Health Cloud, Financial Services Cloud, Sales Cloud, and Service Cloud Clean, scalable architecture (not quick fixes) Strong communication & fast turnaround Long-term client relationships with consistent results Let's Build Something Scalable Whether you need Health Cloud implementation, Financial Services Cloud setup, Sales/Service Cloud configuration, RevOps automation, or full CRM architecture, I can help you build a Salesforce system that actually drives growth. 💬 Let's connect and turn your Salesforce into a powerful revenue engine.

Struggling with aging Accounts Receivable (AR) and frequent claim denials? I help healthcare providers optimize their medical billing cycle through accurate charge entry, fast payment posting, and proactive insurance follow-ups to maximize reimbursements and improve cash flow. Dedicated Medical Billing Specialist with expertise in Revenue Cycle Management (RCM), Payment Posting, AR Follow-up, Denial Management, and Insurance Claims Processing. I help healthcare providers maintain smooth billing operations with accuracy, efficiency, and HIPAA-compliant workflows. I have hands-on experience managing the complete medical billing cycle, including eligibility verification, charge entry, claim submission, payment posting, denial resolution, appeals, patient billing, and insurance follow-up. My goal is to ensure faster reimbursements, clean claims, and improved financial performance for healthcare practices. Services I Offer ✔ Insurance Eligibility & Benefits Verification ✔ Charge Entry & Claim Submission ✔ Payment Posting (ERA/EOB) ✔ AR Follow-up & Aging Reports ✔ Denial Management & Appeals ✔ Medicare & Commercial Insurance Billing ✔ ICD-10, CPT & HCPCS Coding Knowledge ✔ Patient Billing & Collections ✔ Credentialing & Provider Enrollment ✔ ERA/EDI Enrollment ✔ Insurance Claims Follow-up Medical Specialties ✔ Mental Health/Behavioral Health ✔ Pediatrics ✔ Internal Medicine ✔ Physical Therapy ✔ Urgent Care ✔ Dermatology ✔ Cardiology ✔ Oncology ✔ Laboratory Billing Software & Tools Experience ✨ AdvancedMD ✨ Kareo ✨ Office Ally ✨ eClinicalWorks (ECW) ✨ DrChrono ✨ Athenahealth ✨ CureMD ✨ WebPT Insurance Portals & Payer Systems 🖥️ CGS Medicare 🖥️ WPS Medicare 🖥️ Palmetto GBA 🖥️ Noridian Medicare 🖥️ Novitas Solutions 🖥️ NaviNet 🖥️ Availity 🖥️ UnitedHealthcare (UHC) 🖥️ Cigna 🖥️ Optum 🖥️ PaySpan 🖥️ Humana 🖥️ Molina Healthcare 🖥️ Health First Clearinghouses 🖥️ Availity 🖥️ Waystar 🖥️ TriZetto 🖥️ Emdeon 🖥️ Office Ally Why Clients Choose Me ✔ Accurate and detail-oriented work ✔ Fast communication and timely delivery ✔ Strong denial-resolution expertise ✔ HIPAA-compliant workflow ✔ Reliable and professional support I am committed to helping healthcare providers improve revenue, reduce denials, and maintain efficient billing operations through high-quality medical billing services. Thank you for visiting my profile. I look forward to working with you and contributing to your success. Muhammad Hasnain Khan

💬 "Askar is a highly skilled and dependable full-stack engineer with a rare combination of technical expertise and deep healthcare domain knowledge." — Dean, USA ~ Upwork Hi, I'm Askar 👋 – a Software Engineer with 4+ years of experience specializing in .NET (C#, ASP.NET Core), FastAPI, Node.js, React and Angular, with hands-on expertise in building HIPAA-compliant healthcare platforms integrated with Athenahealth, NextGen, and EPIC systems. I've helped multiple U.S. healthcare providers modernize their systems by delivering secure patient portals, audit-logging frameworks, and real-time EHR data syncs — all while ensuring full HIPAA compliance and a smooth user experience for doctors, patients, and admins. ✅ Why Clients Choose Me → Full Involvement, No Outsourcing: I personally handle every stage — design, development, and delivery. → Deep Healthcare Experience: 4+ years working with U.S. healthcare startups gives me practical insight into real compliance and clinical workflows. → OWASP Certified (Advanced Security): I design systems that keep cybersecurity in check from day one. → Free HIPAA Audit: For fixed-size projects, I include a pre-launch HIPAA audit to ensure full compliance. → Clean, Scalable Architecture: Microservices + Clean Architecture principles make your solution future-ready. → HIPAA Expertise from Real Work: I've lived and coded inside HIPAA projects — not just watched tutorials. 💻 Technical Expertise → Backend: .NET Core, C#, EF Core, REST APIs, Azure Service Bus, Stripe Integration, FastAPI, Node.js → Frontend: Angular, React, Modular UI, Responsive Dashboards, Reusable Components, i18n (multi-language support) → Database: SQL Server & MongoDB – optimized for large patient data sets → Cloud & DevOps: Azure App Services, CI/CD Pipelines, Docker Deployments → Languages: Java, Python, C#, Javascript 🏥 Healthcare-Focused Solutions → HIPAA-compliant patient portals with Role-based Access (OAuth2, OpenID Connect) → Athenahealth / EPIC / NextGen EHR Integrations with secure real-time sync → Insurance API Integrations — Aetna provider directory, prior authorization, and real-time eligibility verification → Prior Authorization workflows and referral automation for US healthcare providers → Immutable Audit Logs for compliance validation → OCR-based Prescription Reading using Generative AI → Machine Learning tools for visit outcome analysis → Telehealth Integrations using RingCentral for online consultations → Health record de-identification pipelines built to HIPAA minimum-necessary standards → Clinical document uploads and appointment sync (Athenahealth + Google Calendar) → Clearinghouse integrations via Availity → HL7 v2/v3 and FHIR R4 pipelines — Epic encounters, medication orders, and referral data 🏆 Achievements & Certifications 🥇 Best Employee Award – Techlogix (2024) 🏆 Top 50 Nationwide – All-Pakistan Speed Programming Competition 🎓 Dean's Honor List – FAST NUCES 🔐 HIPAA Certified 🛡️ OWASP Advanced Security Certified If you're building or scaling a healthcare platform, especially one involving EHR/EMR integration, insurance workflows, or HIPAA compliance, let's connect. I bring the perfect mix of technical depth, security-first thinking, and healthcare domain expertise your project deserves. 🚀

𝐀 𝐬𝐢𝐧𝐠𝐥𝐞 𝐡𝐞𝐚𝐥𝐭𝐡𝐜𝐚𝐫𝐞 𝐝𝐚𝐭𝐚 𝐛𝐫𝐞𝐚𝐜𝐡 𝐧𝐨𝐰 𝐚𝐯𝐞𝐫𝐚𝐠𝐞𝐬 $𝟕.𝟒𝐌 — 𝐭𝐡𝐞 𝐜𝐨𝐬𝐭𝐥𝐢𝐞𝐬𝐭 𝐨𝐟 𝐚𝐧𝐲 𝐢𝐧𝐝𝐮𝐬𝐭𝐫𝐲. 𝐀 𝐟𝐚𝐢𝐥𝐞𝐝 𝐄𝐇𝐑 𝐢𝐧𝐭𝐞𝐠𝐫𝐚𝐭𝐢𝐨𝐧 𝐜𝐨𝐬𝐭𝐬 𝐲𝐨𝐮 𝐭𝐡𝐞 𝐰𝐡𝐨𝐥𝐞 𝐩𝐫𝐨𝐝𝐮𝐜𝐭. I build healthcare platforms that pass the security review and the clinician's daily use — the two places most health software dies. For 8+ years I've delivered HIPAA-compliant EHR, telehealth, and AI health platforms, including work that helped a client secure $7M+ in Series A funding. I don't just write code. I solve for 𝐢𝐧𝐭𝐞𝐫𝐨𝐩𝐞𝐫𝐚𝐛𝐢𝐥𝐢𝐭𝐲, 𝐝𝐚𝐭𝐚 𝐬𝐞𝐜𝐮𝐫𝐢𝐭𝐲, 𝐚𝐧𝐝 𝐜𝐥𝐢𝐧𝐢𝐜𝐚𝐥 𝐞𝐟𝐟𝐢𝐜𝐢𝐞𝐧𝐜𝐲 so your product scales, performs, and earns trust. ***𝐖𝐡𝐚𝐭 𝐖𝐞'𝐯𝐞 𝐃𝐞𝐥𝐢𝐯𝐞𝐫𝐞𝐝*** - 𝐑𝐏𝐌 / 𝐑𝐓𝐌 / 𝐂𝐂𝐌 𝐩𝐥𝐚𝐭𝐟𝐨𝐫𝐦 𝐦𝐨𝐧𝐢𝐭𝐨𝐫𝐢𝐧𝐠 𝐭𝐡𝐨𝐮𝐬𝐚𝐧𝐝𝐬 𝐨𝐟 𝐩𝐚𝐭𝐢𝐞𝐧𝐭𝐬 — automated device sync (PAP machines, pulse oximeters, Apple Watch, Garmin, Fitbit, Oura), real-time compliance dashboards with risk stratification, and EHR integration. Includes a custom 𝐀𝐈 𝐞𝐚𝐫𝐥𝐲-𝐰𝐚𝐫𝐧𝐢𝐧𝐠 𝐦𝐨𝐝𝐞𝐥 (trained on 28,000+ patients, 0.96 AUC) flagging adherence failure weeks ahead, plus automated billing under 2026 CMS RPM/RTM/CCM codes - 𝐂𝐨𝐦𝐩𝐫𝐞𝐡𝐞𝐧𝐬𝐢𝐯𝐞 𝐩𝐞𝐝𝐢𝐚𝐭𝐫𝐢𝐜 𝐭𝐡𝐞𝐫𝐚𝐩𝐲 𝐄𝐌𝐑 (OT/PT/ST/ABA) — multi-tenant, FHIR-native SaaS (Medplum) for outpatient, in-home, and school-based care. Onboarding, RBAC, scheduling, clinical documentation, and authorizations — with 𝐀𝐈-𝐚𝐬𝐬𝐢𝐬𝐭𝐞𝐝 𝐝𝐨𝐜𝐮𝐦𝐞𝐧𝐭𝐚𝐭𝐢𝐨𝐧 (voice/text/structured) and 𝐚𝐮𝐭𝐨𝐦𝐚𝐭𝐞𝐝 𝐑𝐂𝐌 (CMS-1500, Availity eligibility, AI compliance engine, claim-lifecycle tracking). Built to ONC certification criteria - 𝐒𝐮𝐧𝐧𝐲 𝐓𝐞𝐥𝐞𝐡𝐞𝐚𝐥𝐭𝐡 — 𝐩𝐚𝐭𝐢𝐞𝐧𝐭-𝐟𝐚𝐜𝐢𝐧𝐠 𝐭𝐞𝐥𝐞𝐡𝐞𝐚𝐥𝐭𝐡 𝐩𝐥𝐚𝐭𝐟𝐨𝐫𝐦 + 𝐜𝐮𝐬𝐭𝐨𝐦 𝐡𝐞𝐚𝐥𝐭𝐡𝐜𝐚𝐫𝐞 𝐂𝐑𝐌 (in production). Patient self-scheduling synced to provider calendars, full lead lifecycle (capture → consent → conversion), segmented marketing automation, RingCentral click-to-call, and a clinician 𝐂𝐡𝐫𝐨𝐦𝐞 𝐞𝐱𝐭𝐞𝐧𝐬𝐢𝐨𝐧 for in-EMR workflows. Bi-directional 𝐉𝐮𝐧𝐨 𝐄𝐌𝐑 𝐢𝐧𝐭𝐞𝐠𝐫𝐚𝐭𝐢𝐨𝐧 (REST API), dynamic RBAC with PHI audit logging, 𝐏𝐈𝐏𝐄𝐃𝐀-𝐜𝐨𝐦𝐩𝐥𝐢𝐚𝐧𝐭 with Canadian data residency - 𝐂𝐚𝐢𝐫𝐚𝐬𝐮 𝐇𝐨𝐦𝐞 𝐂𝐚𝐫𝐞 — 𝐞𝐧𝐝-𝐭𝐨-𝐞𝐧𝐝 𝐡𝐨𝐦𝐞-𝐜𝐚𝐫𝐞 𝐨𝐩𝐞𝐫𝐚𝐭𝐢𝐨𝐧𝐬 𝐩𝐥𝐚𝐭𝐟𝐨𝐫𝐦 — three mobile apps (caregiver EVV, staff, client) plus admin/client web portals, multi-tenant, built for 10,000+ monthly visits. 𝐄𝐕𝐕 with GPS clock-in/out, offline sync, and signature capture; 𝐒𝐚𝐧𝐝𝐚𝐭𝐚 𝐀𝐠𝐠𝐫𝐞𝐠𝐚𝐭𝐨𝐫 integration for 21st Century Cures Act & state Medicaid compliance; an 𝐚𝐮𝐭𝐨𝐦𝐚𝐭𝐞𝐝 𝐩𝐚𝐲𝐫𝐨𝐥𝐥 𝐞𝐧𝐠𝐢𝐧𝐞 (timesheets, overtime/PTO rules, federal/state/Medicaid tax, pay stubs) and double-entry expense/budget ledger with QuickBooks export - 𝐬𝐨𝐡𝐞𝐚𝐥𝐭𝐡𝐟𝐮𝐥 — 𝐅𝐇𝐈𝐑-𝐧𝐚𝐭𝐢𝐯𝐞 𝐩𝐞𝐫𝐬𝐨𝐧𝐚𝐥 & 𝐟𝐚𝐦𝐢𝐥𝐲 𝐡𝐞𝐚𝐥𝐭𝐡-𝐫𝐞𝐜𝐨𝐫𝐝 𝐚𝐩𝐩 (iOS & Android) — full-stack build, rebuilt after a compliance audit: 𝐅𝐇𝐈𝐑-𝐚𝐥𝐢𝐠𝐧𝐞𝐝, 𝐒𝐞𝐫𝐯𝐢𝐜𝐞𝐬 𝐀𝐮𝐬𝐭𝐫𝐚𝐥𝐢𝐚-𝐚𝐩𝐩𝐫𝐨𝐯𝐞𝐝, zero production outages since launch - 𝐄𝐟𝐥𝐞𝐚 — 𝐫𝐞𝐦𝐨𝐭𝐞 𝐬𝐚𝐟𝐞𝐭𝐲 & 𝐡𝐞𝐚𝐥𝐭𝐡-𝐦𝐨𝐧𝐢𝐭𝐨𝐫𝐢𝐧𝐠 𝐚𝐩𝐩 for a market-leading Canadian LTE smartwatch — iOS & Android apps, caregiver monitoring backend, real-time alerting: vitals, fall/seizure detection with GPS alerts, geofencing, SOS, multi-guardian support 𝐏𝐥𝐮𝐬 𝐦𝐚𝐧𝐲 𝐦𝐨𝐫𝐞 — Cerner/Oracle Health SMART on FHIR integrations, HIPAA-compliant teledermatology, AI clinical documentation and SOAP-note generation, multi-portal vaccine management, and intake & scheduling automation (Formsort, DrChrono, Salesforce). ***𝐂𝐨𝐦𝐩𝐥𝐢𝐚𝐧𝐜𝐞, 𝐂𝐨𝐯𝐞𝐫𝐞𝐝 𝐟𝐫𝐨𝐦 𝐃𝐚𝐲 𝐎𝐧𝐞*** Consultation and full-stack implementation for industry-grade compliance: 𝐇𝐈𝐏𝐀𝐀 · 𝐏𝐈𝐏𝐄𝐃𝐀 · 𝐆𝐃𝐏𝐑 · 𝐇𝐈𝐓𝐄𝐂𝐇 · 𝐒𝐎𝐂 𝟐 · 𝐈𝐒𝐎 𝟐𝟕𝟎𝟎𝟏 · 𝐅𝐃𝐀 𝐌𝐃𝐃𝐒 · 𝐎𝐍𝐂 · 𝐇𝐋𝟕 & 𝐅𝐇𝐈𝐑 · 𝟐𝟏𝐬𝐭 𝐂𝐞𝐧𝐭𝐮𝐫𝐲 𝐂𝐮𝐫𝐞𝐬 𝐀𝐜𝐭 Experience building FDA-registered MDDS platforms and ONC-aligned EMRs, built to the highest data security and privacy standards. ***𝐓𝐞𝐜𝐡 𝐒𝐭𝐚𝐜𝐤*** 𝐅𝐫𝐨𝐧𝐭𝐞𝐧𝐝: React, TypeScript, Vue, Angular, Material UI, Tailwind 𝐁𝐚𝐜𝐤𝐞𝐧𝐝: Node.js, Express.js, Django REST, REST, GraphQL, OAuth, JWT 𝐃𝐚𝐭𝐚𝐛𝐚𝐬𝐞𝐬: MongoDB, PostgreSQL, MySQL, Firebase 𝐀𝐈/𝐌𝐋: OpenAI API, TensorFlow, PyTorch, NLP, Computer Vision, MLOps 𝐃𝐞𝐯𝐎𝐩𝐬: AWS, Microservices, Docker, CI/CD ***𝐇𝐞𝐚𝐥𝐭𝐡𝐜𝐚𝐫𝐞 𝐒𝐭𝐚𝐧𝐝𝐚𝐫𝐝𝐬 & 𝐏𝐥𝐚𝐭𝐟𝐨𝐫𝐦𝐬*** HL7, FHIR (SMART on FHIR), CDA, DICOM, ICD — built on Medplum and OpenEMR, integrated with Cerner (Oracle Health), athenahealth, and DrChrono Let's turn your healthcare idea into a compliant, scalable product clinicians actually use. Tap 𝐈𝐧𝐯𝐢𝐭𝐞 𝐭𝐨 𝐉𝐨𝐛 to start building results, not just software.