I help teams design and ship mobile applications for Android and iOS. My core background is native Android (Kotlin, Java), and cross-platform (Flutter & React Native). I've delivered 20+ commercial apps across fintech, social, maps, logistics, and entertainment. I cover the full cycle: architecture, feature development, testing, performance optimization, and post-release support. 🎯 What I work on: - New apps from scratch - UI/UX implementation - Architecture improvements - Crash fixes & stability - Release automation - Firebase/Analytics integration - API/backend integration - AI integration 🛠 Architecture: MVVM, MVP, Clean Architecture 🧩 Technologies and Libraries: - Android: Kotlin, Java, Jetpack Compose, Android SDK, Dagger/Hilt, Room, Retrofit, OkHttp, Coroutines, Flow - Flutter: Dart, BLoC, Provider, Riverpod, GetX - React Native: JavaScript, TypeScript, Redux, Expo - Firebase: Crashlytics, Analytics, AdMob, A/B testing, Cloud Messaging - Testing: JUnit, Mockito, Espresso, Robolectric - Git: GitHub/GitLab, Bitbucket, Mercurial 🤖 How I use AI I use AI as a productivity tool to speed up repetitive engineering work, but I never deliver raw AI-generated output. I focus on scalable, maintainable, and high-performance applications, delivering projects that meet both user expectations and business goals. If you are looking for someone who can build Android features or improve app quality - contact me.

Oracle certified associate, java 8 programmer I Over 13+ years, I have developed a wide range of web applications using Java, J2EE, JSF, Primefaces, Struts, LDAP, maven, Spring, Spring-boot, Spring-data, Spring-JPA, Hibernate, GWT, Oracle, MySql, Weblogic, Tomcat, WildFly/Jboss, PHP. My core competency lies in complete end-end management, I am seeking opportunities to build products from the ground up for you.

I’m a full-stack Software Engineer with strong backend expertise, experienced in building reliable APIs, data-driven systems, and clean frontend features. I work on end-to-end development, from designing backend services and integrations to implementing user-facing features with a focus on maintainability, performance, and real-world use. What I can help with: Building and maintaining REST APIs and backend services Full-stack feature development (backend + frontend) Data processing, reporting, and dashboards Improving existing systems, performance, and code quality Integrating practical data or AI-driven features Tech Stack: Backend: Java (Spring Boot), Python (FastAPI, Django), Node.js, SQL Frontend: React, HTML, CSS, Tailwind Data: Pandas, NumPy, Tableau, Matplotlib, Seaborn I write clean, testable, production-ready code and communicate clearly throughout a project. I’m reliable, detail-oriented, and focused on delivering work that supports your goals. If you’re looking for a developer who can work across the stack and take ownership of features, I’m happy to discuss your project.

Startups hire me when they need a backend that ships on time, handles real users, and doesn't fall apart after launch. I specialize in Java Spring Boot backends and full-stack SaaS applications — from initial architecture to production deployment. Whether you're building an MVP from scratch or scaling an existing system, I own the full backend lifecycle: API design, database modeling, authentication, payments, and cloud deployment. What I bring to your project: Spring Boot · REST APIs · Microservices · Spring Security · JPA/Hibernate · React · PostgreSQL · MySQL · MongoDB · Docker · Kubernetes · GitHub Actions · Jenkins · Stripe · OAuth · SendGrid · AWS Recent projects: → Built a Linktree-style SaaS MVP end-to-end — React frontend, Spring Boot backend, Stripe subscription tiers, PostgreSQL — shipped and live → Led backend development for a live digital card platform — OAuth, analytics dashboard, SendGrid email flows → Engineered a DuckDB + Spring Boot data pipeline ingesting Parquet files from S3 → Built WebSocket-based real-time features integrated with a React frontend I write code that is clean, well-tested, and easy to hand off. I ask the right questions before writing a single line, flag problems early, and keep communication clear throughout. I work best with founders and product teams who need a reliable technical partner — not just someone to execute tickets, but someone who understands the product and cares about the outcome. If that sounds like what you need, let's talk.

Need a secure, scalable backend that doesn't buckle under pressure? High-growth fintech and enterprise platforms require more than just code—they require ironclad security and seamless integrations. Whether you are scaling a banking app or migrating to a microservices architecture, I build the robust systems that keep your business running 24/7. How I add value to your project: Fintech-Grade Security: Expert in OAuth2, JWT, and WSO2 (APIM/MI/IS) to ensure your data and APIs remain uncompromised. Proven Scalability: Integrated Tier-1 banks (Standard Chartered & JS Zindagi) into the Zong App, handling millions of potential transactions. Full-Stack Efficiency: Bridging the gap between complex Java/Node.js backends and high-performance React/Next.js frontends. Key Achievements: Reduced Latency: Optimized API monetization systems, improving response times by 30%. Seamless Integration: Successfully deployed secure payment gateways for 5+ enterprise-level financial services. Certified Expertise: WSO2 Certified Developer—ready to handle complex API Management and Identity Server tasks. Expertise in: Java Spring Boot, Node.js, React.js, Next.js, Angular, MySQL, and MongoDB. Ready to discuss your technical roadmap? Click the "Message" or "Invite" button, and let’s build a solution that scales with your ambi

We help enterprises modernize, migrate, and future-proof IBM i (AS400), Mainframe, COBOL, and RPG environments while integrating them with cloud-native, API-first, and AI-enabled architectures. We are also ISO 42001 and ISO 27001 certified, ensuring strong AI governance and information security standards. Since 2013, we have delivered transformation programs for 100+ global clients, including Fortune 500 organizations—turning rigid legacy platforms into scalable, digital ecosystems. With deep expertise across IBM i, ERP, EDI, cloud, and enterprise application stacks, we bridge traditional systems with modern Java, .NET, cloud, microservices, AI, and real-time integration frameworks. Legacy Systems & IBM i / Mainframe Modernization Platforms: IBM i (AS400 / iSeries), IBM z, COBOL, RPG, SQLRPGLE, CLLE, Synon, NetCOBOL, Fujitsu COBOL, Delphi Operating Systems: OS/400 (V5R3–V7R5), IBM AIX Tools: Profound, LANSA, Synon, WebSphere, ARCAD, X‑Analysis, MIMIX, RDi, ACS Core Modernization Services AS400 / IBM i modernization & green‑screen transformation RPG to Java and .NET migration COBOL to NetCOBOL / Fujitsu COBOL conversion IBM i API enablement & microservices architecture DB2/400 migration to PostgreSQL, SQL Server, Cloud databases IBM i cloud migration (AWS & Azure hybrid models) Legacy application refactoring & performance optimization Full‑Stack Development (Java | .NET | PHP | Delphi) Java: Spring/Spring Boot, Hibernate, Struts, Microservices, REST/SOAP, Kafka, Camel .NET: .NET Core/5–7, ASP.NET Core, MVC, Web API, Blazor, WCF, SignalR, EF Core, WPF, WinForms PHP & Delphi: Laravel, Symfony, CodeIgniter, Yii, Zend | Delphi 7–11, RAD Studio, VCL, FireMonkey Frontend: React, Angular, Vue, Next, Bootstrap ERP, Integration & Streaming ERP: JobBOSS ERP (Manufacturing), JD Edwards (CNC, BSSV, Z‑Tables, UBE), Infor (XA, LX), PrismERP, S2K, CAMS/400, Dynamics AX Integration: MuleSoft (API‑led, DataWeave, RAML), Apache Kafka, REST/SOAP, cloud & hybrid integration EDI & B2B Integration X12, EDIFACT, VDA, TRADACOMS • Transactions 850–945 • VANs: OpenText, Liaison, GHX • FTP/SFTP/AS2 IBM Sterling, SPS Commerce, TrueCommerce • End‑to‑end EDI onboarding & automation AI, Cloud & DevOps AI: Code analysis, automated refactoring & tests, smart documentation, intelligent EDI validation Cloud & DevOps: AWS, Azure, GCP • CI/CD, Docker, Kubernetes, Jenkins, GitHub Actions Databases: DB2/400, PostgreSQL, MySQL, SQL Server, Oracle, MongoDB, Redis Why Choose Us? Proven IBM i / IBM z modernization expertise Kafka & MuleSoft real-time integration Deep EDI & ERP (Infor, JDE) capability Structured, outcome-driven transformation AI‑assisted acceleration for faster transformation Performance Assurance Dedicated 40+ hrs/week resource Direct Upwork communication Daily updates, weekly reports On-time, high-quality delivery Let's connect - If you are planning AS400 modernization, RPG conversion, COBOL migration, ERP integration, EDI automation, or AI-enabled transformation, we help you execute with precision and measurable outcomes. Keywords- IBM i Modernization | AS400 Modernization | RPG to Java Conversion | RPG to .NET Migration | Free Format RPG | Green Screen Modernization | IBM i Web Enablement | Legacy System Modernization | IBM i GUI Modernization | IBM i Cloud Migration | DB2 Migration | IBM i Consultant | Infor ERP Integration | JD Edwards EnterpriseOne | JDE API Integration | JDE Cloud Migration | ERP Integration | EDI 850 810 856 | WMS Integration | Cobol to Netcobol | Fujitsu Cobol | Delphi Modernization | Mainframe Migration | AI-Assisted Development | DevOps for IBM i | Enterprise Application Modernization | COBOL Migration | Mainframe Modernization | Job BOSS | IBM BOB | AI‑Assisted Modernization | ISO27001 | ISO42001

Aspiring Full Stack Java Developer | Builder of Scalable, Clean, and Modern Web Applications 🔹 Strong foundation in PHP, WordPress, Laravel 🔹 Built RESTful APIs using Java & Spring Boot in academic and personal projects, including a task management web app with JWT-based authentication 🔹 Practical experience with frontend technologies: HTML, CSS, JavaScript — developed responsive UIs and single-page apps 🔹 Skilled in MySQL for database design, normalization, and complex queries (e.g., built multi-table reporting modules for small business apps) 🔹 Knowledge of Microservices Architecture, Cloud Platforms (AWS EC2/S3 & Azure basics), and DevOps fundamentals (Docker, CI/CD concepts) 🔹 Enthusiastic about problem-solving, clean code, and software development best practices 🔹 Passionate about clean code, Agile practices, and collaborative development — contributed to an open-source issue on GitHub 🔹 Currently seeking an opportunity to apply my full-stack skills in a real-world team environment, grow under mentorship, and contribute to impactful projects

🏆 𝗕𝗮𝗰𝗸𝗲𝗻𝗱 𝗲𝘅𝗽𝗲𝗿𝘁 with 𝗝𝗮𝘃𝗮, 𝗖#, and 𝗚𝗼 🏆 𝗧𝗼𝗽 𝗥𝗮𝘁𝗲𝗱 𝗣𝗹𝘂𝘀 Talent at Upwork 🏆 100% Job Success 🏆 The most adaptable 𝗦𝗼𝗳𝘁𝘄𝗮𝗿𝗲 𝗘𝗻𝗴𝗶𝗻𝗲𝗲𝗿 you can find on this platform 🏆 Long-term satisfied clients I’m a 𝗦𝗲𝗻𝗶𝗼𝗿 𝗦𝗼𝗳𝘁𝘄𝗮𝗿𝗲 𝗘𝗻𝗴𝗶𝗻𝗲𝗲𝗿 with over 𝟴 𝘆𝗲𝗮𝗿𝘀 𝗼𝗳 𝗲𝘅𝗽𝗲𝗿𝗶𝗲𝗻𝗰𝗲 building scalable, secure, and reliable software solutions. My expertise lies in 𝗝𝗮𝘃𝗮, 𝗖#, and 𝗚𝗼, and I’m passionate about delivering high-quality systems that solve real-world problems and exceed client expectations. 𝗪𝗵𝗮𝘁 𝗜 𝗕𝗿𝗶𝗻𝗴 𝘁𝗼 𝘁𝗵𝗲 𝗧𝗮𝗯𝗹𝗲: ⭐️𝗕𝗮𝗰𝗸𝗲𝗻𝗱 𝗗𝗲𝘃𝗲𝗹𝗼𝗽𝗺𝗲𝗻𝘁 𝗘𝘅𝗽𝗲𝗿𝘁𝗶𝘀𝗲: I’ve built robust APIs, microservices, and backend systems that are designed for performance and scalability using Java, C#, and Go. ⭐️𝗘𝗻𝘁𝗲𝗿𝗽𝗿𝗶𝘀𝗲-𝗚𝗿𝗮𝗱𝗲 𝗦𝗼𝗹𝘂𝘁𝗶𝗼𝗻𝘀: I’ve worked on complex systems across industries like 𝗵𝗲𝗮𝗹𝘁𝗵𝗰𝗮𝗿𝗲, 𝗲-𝗰𝗼𝗺𝗺𝗲𝗿𝗰𝗲, 𝘁𝗼𝗹𝗹𝗶𝗻𝗴 and in small amounts of 𝗳𝗶𝗻𝘁𝗲𝗰𝗵, always focusing on reliability and usability. ⭐️𝗖𝗹𝗼𝘂𝗱 𝗜𝗻𝘁𝗲𝗴𝗿𝗮𝘁𝗶𝗼𝗻: I’m skilled at leveraging platforms like AWS, Azure, and Google Cloud to ensure seamless scalability and exceptional performance. ⭐️𝗗𝗮𝘁𝗮𝗯𝗮𝘀𝗲 𝗠𝗮𝗻𝗮𝗴𝗲𝗺𝗲𝗻𝘁: From relational (SQL) to NoSQL databases, I ensure data is stored securely and efficiently. ⭐️𝗔𝗴𝗶𝗹𝗲 𝗗𝗲𝘃𝗲𝗹𝗼𝗽𝗺𝗲𝗻𝘁 𝗣𝗿𝗮𝗰𝘁𝗶𝗰𝗲𝘀: I follow Agile and DevOps methodologies to deliver results iteratively, keeping clients in the loop every step of the way. 𝗛𝗼𝘄 𝗜 𝗪𝗼𝗿𝗸: ⭐️𝗖𝗹𝗲𝗮𝗿 𝗖𝗼𝗺𝗺𝘂𝗻𝗶𝗰𝗮𝘁𝗶𝗼𝗻: I value open and transparent communication to make sure we’re always aligned with your vision. ⭐️𝗖𝗹𝗲𝗮𝗻, 𝗠𝗮𝗶𝗻𝘁𝗮𝗶𝗻𝗮𝗯𝗹𝗲 𝗖𝗼𝗱𝗲: I write code that’s not just functional but also easy to maintain and scale for the future. ⭐️𝗢𝗻-𝗧𝗶𝗺𝗲 𝗗𝗲𝗹𝗶𝘃𝗲𝗿𝘆: I’m committed to meeting deadlines without compromising quality—your success is my priority. 𝗠𝘆 𝗧𝗼𝗼𝗹𝗸𝗶𝘁: 🚀𝗟𝗮𝗻𝗴𝘂𝗮𝗴𝗲𝘀: Java, C#, Go 🚀𝗙𝗿𝗮𝗺𝗲𝘄𝗼𝗿𝗸𝘀: Spring Boot, ASP.NET Core, Gin 🚀𝗗𝗲𝘃𝗢𝗽𝘀 𝗧𝗼𝗼𝗹𝘀: Docker, Kubernetes, CI/CD pipelines 🚀𝗖𝗹𝗼𝘂𝗱 𝗣𝗹𝗮𝘁𝗳𝗼𝗿𝗺𝘀: AWS, Azure, Google Cloud 🚀𝗩𝗲𝗿𝘀𝗶𝗼𝗻 𝗖𝗼𝗻𝘁𝗿𝗼𝗹: Git, GitHub, GitLab 𝗟𝗲𝘁’𝘀 𝗖𝗼𝗹𝗹𝗮𝗯𝗼𝗿𝗮𝘁𝗲: If you’re looking for someone who’s not just a coder but a person who can bring joy and fun to the game, I’d love to chat. Whether it’s building something new or optimizing your current system, let’s work together to make it happen!

Hello! I'm Jalal, a passionate and seasoned Android App Developer with over 5 years of hands-on experience in creating innovative, user-centric mobile applications. My expertise lies in leveraging Kotlin and Java to build robust, scalable, and efficient apps that not only meet but exceed client expectations. Comprehensive Experience - Developed and deployed 10+ Android apps across various domains including e-commerce, finance, healthcare, entertainment and phone diagnostics. Technical Proficiency - Expert in Kotlin and Java, with extensive knowledge of Android SDK, Jetpack components, and modern architectural patterns like MVP, MVC, MVVM and MVI. UI/UX Focused - Strong eye for design and usability, ensuring that each app delivers an intuitive and engaging user experience. API Integration - Proficient in RESTful API and third-party library integration (Retrofit, Glide, Firebase, Google Map, Mapbox, FFMPEG and other libraries). Performance Optimization - Skilled in optimizing app performance and memory usage, ensuring smooth and fast user interactions. Quality Assurance - Committed to maintaining high code quality through rigorous testing and adherence to best practices. What I Can Offer Custom Android App Development: Tailored solutions to bring your unique app ideas to life, from concept to deployment. Maintenance & Upgrades: Ongoing support to keep your app updated with the latest features and improvements. Code Review & Optimization: Detailed analysis and enhancement of existing codebases to boost performance and maintainability. Bug Fixing & Troubleshooting: Quick and effective resolution of any issues to ensure your app runs flawlessly. Notable Projects: E-commerce Platform: Developed a feature-rich shopping app with real-time inventory updates, secure payment gateway integration, and personalized recommendations. Project names are Vital Sales Pro, Sufi Sales Pro. Healthcare App: Created a comprehensive health tracking application that includes appointment scheduling, medication reminders, and telehealth services. Project names are AlphaCare, Inteli-Health, Family Doc. Diagnostics App: Created a robust, smart and user friendly phone diagnostic app. Which helps the client to diagnose the mobile phone in minutes and ensure that all the components like Speakers, Microphones, Sensors, Storage and other functionalities are working perfectly. Project names are PhoneCheck, DeviceWork & MoboCheck. Core Skills - My core skill set includes Kotlin, Java, Android SDK, Jetpack Compose, MVP, MVC, MVVM, MVI, RESTful APIs, Firebase, Retrofit, Glide, Dagger2, Hilt, UI/UX Design, Performance Optimization, Quality Assurance. Availability: I am available for Full-Time, Part-Time and Project Based. Let's Connect: I am dedicated to helping you achieve your app development goals. Let's discuss how I can bring your project to life with precision and excellence. Feel free to reach out, and let's get started on your next successful Android app!

Senior Software Engineer with 10+ years of experience designing and building high-load, distributed backend systems in Java. Strong background in microservices architecture, event-driven systems, and fintech platforms, with hands-on experience across AWS, Kafka, Kubernetes, and relational / NoSQL databases. Proven record of owning backend services end-to-end, contributing to architectural decisions, and improving system scalability and reliability. Experienced working as both a senior individual contributor and lead engineer, collaborating closely with product, infrastructure, and business teams on production-critical systems.