I am a skilled Java Backend Developer with strong experience designing and building scalable, high-performance backend systems. Throughout my career, I’ve developed expertise in Java and a wide range of modern backend technologies and frameworks. ✅My core skills include: ✔️Java (19+), Spring Framework, Spring Boot, Spring Data JPA, Spring Security, Spring AOP ✔️RESTful APIs, GraphQL, Web Services ✔️Hibernate, Microservices Architecture ✔️Databases: MySQL, PostgreSQL, Oracle ✔️Build & DevOps Tools: Maven, Docker, Git ✔️Event Streaming: Apache Kafka I earned a certification as an AI Automation Specialist (n8n), expanding my skill set in automation and intelligent system development. I also have working knowledge of additional technologies such as C++, Python, and frontend basics, giving me a well-rounded understanding of full-stack development. I'm passionate about clean code, efficient systems, and delivering reliable, production-ready solutions. Whether you're building a new backend service or need help improving an existing one, I'm here to help.

Hi there! Seeking an expert in Java, Spring, Hibernate, Data Security, Angular, API (REST, SOAP), Node and additional technologies to achieve rapid transaction rate. Over the past 20 years, I have refined my skills through dedicated work in diverse domains such as Application/ERP Development, Application Integrations, Fintech, Oil/LPG Industry, Travel Industry, Education, Telecom , Web Development, Frontend Development, Application Customization, Performance Optimization, and Component Development. I have acquired extensive expertise in Java, Spring, Spring Boot, Spring Reactive, Spring Data, Spring Cloud, Spring Batch, IAM, OAuth 2.0, OpenID Connect, SAML, multi-factor authentication, Keycloak, REST API, SOAP API, JPA, Struts2, AWS Lambda, Hibernate, Node.js, Puppeteer, Next.js, Angular, React, Redis, Kafka, Rabbit MQ, JSP, Servlet, JSF, JavaScript, jQuery, HTML, CSS, XML, Lucene, JXL, POI, XSLT, JSON, JSON-LD, EJS, Python, GraphQL, Apache Airflow, Apache Spark, IBM Cognos, JasperReports, BIRT, Oracle, MySQL, SQL Server, PostgreSQL, IBM DB2, NoSQL, MongoDB, DynamoDB, Tomcat, OC4J, IBM WebSphere, WildFly, JBoss, Docker, Kubernetes, Bitbucket, GitLab, GitHub, RTC, CVS, VSS, Git, Confluence, JIRA, Maven, Gradle, Ant, Cursor, Replit Windsurf, Lovable, Trae, Bolt, Vercel and many more. To secure your data, I have expertise in both symmetric (e.g., AES, DES, Triple DES) and asymmetric (e.g., RSA, ECC) encryption mechanisms. I am also experienced in PGP / GPG encryption, which combines symmetric and asymmetric encryption to secure message content and protect the session key. Additionally, I have integrated applications with Hardware Security Modules (HSMs) for enhanced security. My goal is not just to meet but to exceed your expectations. My method for achieving project success revolves around: – Strategic Planning: Always look on a bigger-picture, make sure all angles are covered. – Agile Development: Adapt on the go, iterative progress yields positive results. – Quality Assurance: Attention to detail, ensure top-quality results by leaving no room for errors. – Timely Delivery: Time is valuable; meeting deadlines is crucial to avoid delays and extra costs. . – Transparent Communication: Clear and concise updates to stake holders. Always aim to collaborate with you, not just work for you, to ensure every milestone leads to success. P.S.: Feel free to drop a message to discuss the details of your project and let's make it a proud achievement for both of us.

Hi, I’m Miloš — Python developer, GIS expert, and project manager with a proven track record of building smart solutions—from spatial data automation to full-fledged business applications. With a Master's in Geodesy and Geoinformatics and a hands-on background in GIS, I started my career solving mapping and cadastral problems. But my curiosity pushed me further—into Python, databases, web frameworks, and eventually, leading teams and projects. Today, I combine technical know-how with strategic thinking to deliver scalable, efficient systems for clients across industries—and for myself. 🔧 What I Do: - Problem Solving – As a passionate riddle-solver, I’ll gladly design a solution tailored to your challenge. - Python Development – From QGIS plugins and PyQt apps to web backends (Django, Flask). - Database Engineering – Postgres, MySQL, Oracle, spatial SQL, and performance optimization. - Automation – Scripts for data processing, web testing (Selenium, Playwright), and workflow optimization. - GIS Systems – Registries, segmentation tools, cadastral platforms, spatial data validation, and more. - Project Management – Leading agile teams, defining scope, managing delivery, and coordinating devs and stakeholders. - Cross-industry Work – Including eCommerce platforms like oddo.deals and business tools like the Royal Fruit App (a fruit reseller platform). 🚀 Highlight Projects: - Oddo.deals – Web platform development & project coordination. - National Cadastral System (Serbia) – Project management, solution design, data testing, topology validation, automation. - Work Organization App – Custom Python + SQL tool for internal operations and financial management. - Royal Fruit App – Full-stack solution for fruit reseller companies to manage inventory and finances. - Geo Segmentation & Mass Valuation Tools – High-volume spatial data systems. - QGIS Drone Flight Planning Plugin – Developed as my faculty graduation project. Whether you need a Python automation expert, a GIS systems engineer, or someone to lead your dev team from chaos to clarity — I’ve got your back. Let’s build something powerful.

I am a highly motivated technology professional with over 12 years of experience in Oracle Technologies, specializing in PL/SQL, SQL, Oracle E-Business Suite (EBS), and Oracle APEX. I hold a Bachelor’s degree in Computer Science and certifications including Oracle Associate (OCA), Oracle APEX Developer, and PMP®. I have successfully led the end-to-end development and deployment of 12+ full-scale applications, showcasing strong expertise across the complete software development lifecycle. Oracle APEX 18.x , 19.x , 20.x, 21.x, 22.x ,23.x, 24.x Application : 1. Pharmacy System (Point Of Sale) 2. Hospital Management System 3. Dairy Farm Management System 4. Advance Laboratory System 5. Purchase Order Approval (E-Business Suite) 6. Honda Point (Sale , Services , Spare Parts) 7. Poultry Farm Management System and Others Custom Application. Excellent experience in Application Development using Oracle SQL, PL/SQL, XML,, HTML, CSS, JavaScript , jQuery and Ajax. • Proficiency in analysis, design, development, testing, implementation and maintenance of applications in Oracle Application Express. • Integration of Oracle APEX with Oracle EBS. • Experience in REST Web Services. • Experience in APEX reports quires & report Layout.

IBM WAS 8.5.5 Certified and AWS Certified Solutions Architect/SysOps/Developer - Associate. Also OCI Certified. Have hands-on knowledge of EC2, VPC, RDS, IAM, Route53, S3, EFS, EBS, CloudFront, ELB, ACM, Secret Manager and ASG. Worked on Web Servers like Apache and Nginx Web Servers, Application Servers like IBM WebSphere Application Server, JBoss, and Tomcat. Worked on Standalone and Clustered Environments. Done LDAP Integrations, DB connectivity, and SSL/TLS Configurations of the servers. Oracle Cloud Infrastructure and Azure Certified. Worked on Linux and Windows Servers. I also developed my Expertise in Docker, Git, Linux, Kubernetes K8s CICD GitHub, GitLab, Ubuntu, Red Hat, Security, SonarQube , Trivy and DevOps engineering. Many Thanks, Muhammad Umar

MISSION To provide the best professional performance and collaborate with the growth of the company. Follow the standards determined by the client and suggest improvements when necessary. Maintain a 100% controlled environment with daily monitoring based on reports and monthly indicators for a better understanding of the activities. Seek professional growth with improvement in the best technologies on the market.

Oracle Fusion Cloud Techno-Functional Consultant at PwC with hands-on experience across 10+ full-cycle ERP implementations. I work across the full implementation lifecycle — As-Is documentation, Gap Analysis, Business Scenario Mapping, CRP sessions, UAT coordination, data migration, and Go-Live support. Functional Expertise: → Oracle Fusion Cloud SCM: Procurement, Inventory Management, Order Management, Discrete Manufacturing → Oracle Fusion Cloud Financials: GL, AP, AR, Fixed Assets, Cash Management, Subledger Accounting → KSA ZATCA/VAT compliance: E-Invoicing Phase 2, reverse charge VAT, tax reporting in Fusion → FBDI data migration across all modules → BIP reports and OTBI analytics Technical Expertise: → Oracle APEX: Custom P2P suites, inventory/POS systems, REST API integrations, AI chatbot development → Oracle Integration Cloud (OIC) → PL/SQL, SQL, BI Publisher Certifications: → Oracle Order Management Cloud Implementation Professional (1Z0-1113) → Oracle Fusion Cloud ERP Essentials → Oracle Fusion Cloud SCM Process Essentials → Certified Oracle APEX Developer → Oracle Cloud Infrastructure Foundations Associate → ACCA Affiliate I deliver clean work on time. Happy to do a quick call to discuss your requirements before starting.

If you're looking for an Oracle Technical Consultant who can translate business requirements into robust Oracle solutions, optimize complex workflows, deliver high-quality customizations, and provide reliable support throughout the project lifecycle, you're in the right place. I have extensive experience in Oracle E-Business Suite (EBS) and Oracle Cloud (Fusion) as a Techno-Functional Consultant. I have great experience in implementations, upgrades (R12), integrations, and production support, helping organizations streamline operations and maximize their ERP investments. My functional expertise spans: Oracle Cloud (Fusion): HCM (Core HR, Payroll, Recruitment Compensation, Absence, Security Console), SCM (purchasing, Procurement, Inventory, Order management), Financials (GL, AP, CM, AR, Assets, and Lease management) Oracle EBS (R12): Financials, SCM, HCM, HRMS, OAF Extensions, Workflows, API Integrations, upgrades (R12.1.3 → 12.2.0, 12.2.6→12.2.10 and so on). Reporting & Analytics (EBS & Fusion): OTBI, BI Publisher (BIP), SmartView, Excel/RTF template, Fast Formulas, HCM Extracts Databases: Oracle database 11g/12c/19c Tools: HDL, SQL, PL/SQL, TOAD, OIC, Page Composer (Personalization), Workflow Builder With a collaborative mindset and strong communication skills, I work effectively with cross-functional teams and stakeholders to deliver projects on time and within scope. If you're looking for an Oracle expert, I’m ready to help you build and scale your systems with confidence.

I am a senior full-stack .NET and mobile developer with 20+ years of software development experience and $100K+ earned on Upwork. I help clients build, modernize, and launch production-ready software across web, mobile, desktop, backend APIs, databases, cloud, IoT, GIS, and AI-powered applications. My strongest areas are: - C#, ASP.NET Core, .NET Framework, Web API, WCF, WPF, UWP, WinUI, Windows services - SQL Server, SQLite, MongoDB, SSRS, stored procedures, data migration, reporting - iOS, Android, React Native, Xamarin, Flutter, Swift, Kotlin, Java - REST APIs, third-party integrations, Azure, AWS, CI/CD, GitHub, Azure DevOps - AI/LLM features, computer vision workflows, device communication, Bluetooth/BLE, TCP/IP, MQTT, GIS/map SDKs Relevant project experience includes: - Medical device tablet software using C#, UWP, XAML, SQLite, Bluetooth BLE, COM communication, logging, cloud backup, and Microsoft Store packaging. - DJI drone and mapping apps for industrial inspection and emissions monitoring, using Android, Kotlin/Java, DJI Mobile SDK, Mapbox/Google Maps, mission planning, real-time monitoring, and data collection. - ASP.NET Core web applications with SQL Server/MongoDB, REST APIs, Entity Framework, Azure DevOps deployment, payment/API integrations, and responsive front-end work. - GIS/GPS platforms, map components, tracking gateways, TCP/UDP listeners, Google Maps, Bing Maps, AWS deployment, and large SQL Server backends. - Mobile apps published to the Apple App Store and Google Play with Firebase, Stripe, Twilio, geolocation, chat, ads, and API integrations. I can step into an existing codebase, understand the architecture quickly, fix bugs, improve performance, refactor safely, add new features, and prepare applications for production release. I am comfortable working directly with founders, product owners, designers, and technical teams. If you need an experienced engineer who can connect business requirements with practical implementation, I can help you move from idea or unstable codebase to a working, maintainable product.

For me, development is about impact. Writing code is only part of the job seeing it deployed, used, and making a real difference for users is what drives my work. With 5+ years of professional experience, I take full ownership of the problems I work on and focus on delivering solutions that are clear, reliable, and built to last. My core expertise is in mobile app development with React Native, where I’ve built and shipped production-ready apps for both iOS and Android. Over the years, I’ve also worked extensively across the full stack contributing to web applications (React, Next.js), backend services (Node.js, PHP, Python), and cloud-based systems. In recent projects, I’ve actively worked with AI-powered features (including OpenAI and Azure AI) to help teams build smarter, faster, and more user-centric products. I’m also comfortable setting up CI/CD pipelines and working across cloud platforms such as AWS, GCP, and Azure. Since 2020, I’ve collaborated with startups, product teams, and businesses across multiple industries, taking projects from early ideas through to stable, production-ready applications. What excites me most is the balance between creativity and engineering turning complex requirements into elegant solutions that can scale. If you’re planning a new product or improving an existing system, feel free to send an invite or share a short brief. I’m happy to help you define a clear technical approach and next steps.