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Turn your app idea into a launch-ready product for iOS and Android - without managing separate frontend developers, backend developers, and project managers. I’m Rajibul Ahsan, a Top Rated Senior Full Stack and Mobile Developer with more than 97 completed projects on Upwork. I specialize in Flutter and React Native development for both iOS and Android. I manage the complete development lifecycle, including frontend, backend, databases, cloud infrastructure, AI functionality, testing, and App Store and Google Play submission - so you work with one accountable technical partner instead of coordinating multiple specialists. What I Build - I build cross-platform mobile applications and MVPs for startups and growing businesses - from product planning and architecture to App Store and Google Play publishing. Recent Work Includes - * A fintech and payments application featuring Stripe integration, real-time order tracking, and scheduling capabilities. * An emergency communication application using Twilio masked calling and the WhatsApp Business API within a QR-based workflow. * AI-powered connection and matchmaking applications incorporating OpenAI and LLM technology. * Ride-sharing and marketplace applications with live geolocation, real-time tracking, and in-app payment processing. Why Clients Keep Hiring Me - I deliver clean, scalable, and maintainable code while communicating clearly throughout the project. I respond quickly, provide regular progress updates, and take a proactive approach to identifying and resolving potential issues. I also provide realistic timelines instead of overpromising to win a project. Clients return for additional work because their applications are delivered reliably, perform as expected, and remain easy to maintain and expand. How I Work - Discovery call and scope definition → architecture and technology selection → weekly testable builds → backend, AI, and payment integrations → quality assurance across devices → App Store and Google Play submission → post-launch support. Technology Stack - Flutter, React Native, Node.js, Firebase, Supabase, Stripe, OpenAI and LLM APIs, REST APIs, push notifications, real-time chat, and cloud infrastructure. Send me your app idea or existing codebase, and I’ll respond with a practical technical approach and realistic timeline—no generic, copy-and-paste response.

I help businesses maintain, improve, and scale existing WordPress website ecosystems without unnecessary rebuilds. My work includes Elementor, WPBakery, WooCommerce, plugin updates, security hardening, performance optimization, compatibility testing, PHP/CSS/JS fixes, API integrations, and clear documentation. I am a Top Rated Plus WordPress developer with $100K+ earned, 9,200+ Upwork hours, 154 completed jobs, and 100% Job Success. I am a good fit for long-term clients who need a reliable technical partner to understand existing systems, maintain production websites, communicate clearly, and recommend practical improvements when needed. Core support areas: * Long-term WordPress maintenance and development * Elementor and WPBakery page builder support * Existing website cleanup, debugging, and improvement * Plugin, theme, security, and compatibility updates * WooCommerce support, checkout fixes, and store maintenance * PHP, JavaScript, HTML, CSS, MySQL, and API troubleshooting * Speed optimization, Core Web Vitals, caching, and Cloudflare * Documentation, testing, staging, backups, and safe deployment I do not push unnecessary rebuilds. My approach is to first understand the current setup, identify risks, stabilize the system, document what I find, and then improve the website step by step. ⚖️ Note: I operate strictly as an independent, accountable freelancer. I work ethically and do not accept projects related to gambling, adult content, or interest‑based finance. Let’s establish a secure, performant, and highly scalable architecture for your business, insha’Allah.

Building scalable, production-grade web applications with a focus on clean code, performance, and end-to-end ownership. The Value I Deliver: - I build modular, maintainable codebases designed to scale. I prioritize "clean-by-default" patterns that reduce long-term technical debt and simplify team collaboration. - Expert at translating complex Figma systems into pixel-perfect, responsive, and accessible interfaces. I ensure the bridge between design and implementation is seamless and high-fidelity. - Deep optimization of Core Web Vitals and SSR/ISR strategies to ensure lightning-fast speeds, superior user experiences, and maximum search visibility. - I focus on business outcomes, not just tickets. I move beyond the "how" of coding to address the "why" of the product, ensuring every feature serves a project goal. - High-transparency communication with a long-term mindset. I work as a technical partner focused on your sustained success and meeting milestones on schedule. Technical Expertise: - Frontend: React, Next.js, Payloadcms, TypeScript, Tailwind CSS, HTML5, Modern CSS (SCSS/Modules) - Backend & Database: Node.js, NestJS, Express, Supabase, PostgreSQL, SQLite - Design: Figma (Advanced Design Systems), UI/UX Auditing, Design-to-Code Workflows - Embeddable widget / web component - Infrastructure & Tools: Git, GitHub Actions (CI/CD), Docker, Agile/Scrum AI-Assisted & Spec-Driven Development: In an era of agentic workflows, I bridge the gap between AI-generated drafts and production-ready systems by: - Drafting Robust Specifications: Translating abstract requirements into deterministic, implementation-ready technical specs. - Hardening & Auditing: Sanitizing and refactoring AI-generated code to enforce strict type safety and architectural consistency. - Automated Validation: Designing rigorous unit and integration tests to ensure logic remains sound and behavior is predictable. - Debt Prevention: Proactively identifying and eliminating "invisible" technical debt before it enters the production environment.

I help researchers, organizations and graduate students turn raw survey and study data into clear, defensible statistical results — and where needed, into publication-ready reports, not just output tables. With 17+ years of experience — including as a team leader on large-scale research and development projects — I specialize in: ✔ Thesis/PhD data analysis — statistical analysis, interpretation, and APA-style reporting for graduate research ✔ Survey data analysis — market research, consumer surveys, and trend analysis, from small to large datasets ✔ Statistical & specialized methods — SPSS, R, Python; hypothesis testing, regression, ANOVA, MCDA/TOPSIS, DIF/GMH, uncertainty quantification ✔ Report writing — turning analysis into clear, well-structured, publication-ready reports My background also includes large-scale field research in Health, Nutrition, Child protection, Environment, Education, and WASH programs — leading household survey data collection (including Kobo Toolbox) for populations as large as 10 million and managing research databases in Access and SQL. This gives me strong practical grounding in real-world data quality, survey design, and messy or complex datasets — skills I bring into every project. ⭐ What I Can Do for You ✔ Clean, validate, and analyze survey/research datasets — small or large, few or many variables ✔ Perform statistical analysis in SPSS, R, or Python, from basic tests to advanced/specialized methods ✔ Support PhD/Masters thesis data analysis with clear, defensible, APA-style output ✔ Write publication-ready reports, not just raw statistical output ✔ Handle large or messy datasets with confidence ✔ Deliver results both researchers and non-technical readers can understand ⚙️ Tools: SPSS | R | Python | Excel | SQL | MS Access | KoboToolbox | PySpark I maintain a 100% Job Success score and Top-Rated status on Upwork. I take pride in accurate, well-documented work — from a single survey analysis to a full thesis-to-publication project.

As a Top Rated Freelancer with over a decade of experience, I build secure, scalable backend systems for SaaS products, eCommerce platforms, and custom business applications. My expertise is in PHP backend development, modern API architecture, and AI workflow automation that helps businesses automate processes, improve productivity, and scale efficiently. I specialize in developing robust applications with Laravel, Symfony, Yii, CodeIgniter, and Laminas (Zend), while also building backend services with Node.js and Go for high-performance applications. What I Offer ⚙️ Backend Development -PHP -Laravel -Symfony -Yii -CodeIgniter -Laminas (Zend) -REST API & GraphQL -Microservices -Authentication & Authorization -Database Design & Optimization -Payment Gateway Integration 🤖 AI Workflow Automation -OpenAI, Claude & Gemini Integration -AI Agents -Workflow Automation -Business Process Automation -Document Processing -AI Chatbots -Custom AI Applications -Internal AI Tools 🛒 eCommerce Development -WooCommerce -Magento -OpenCart -Custom eCommerce Platforms -Subscription Systems -Order & Inventory Management -Payment Processing -Shipping & Tax Integration 🔌 API & Third-Party Integrations -Stripe -PayPal -Twilio -SendGrid -Google APIs -CRM & ERP Integration -Custom REST & GraphQL APIs ☁️ Cloud & Infrastructure -AWS -Docker -GitHub Actions -Linux -Redis -MySQL -PostgreSQL -Performance Optimization Why Clients Work With Me I build backend systems that are reliable, secure, and easy to maintain. Whether you need a Laravel application, a custom backend, API integrations, an eCommerce platform, or AI-powered workflow automation, I deliver clean, production-ready solutions designed for long-term growth. With Top Rated status, 100% Job Success, and years of experience delivering successful projects, I focus on writing maintainable code, communicating clearly, and delivering on time. If you're looking for a Backend Developer, PHP Developer, Laravel Expert, or an AI Workflow Automation Engineer, I'd be happy to discuss your project. #CMS, #Wocoomerce, #Magento, #Joomla

Having tons of data is of little use without proper insights and smart, interactive visualizations to guide you toward the right decisions. You want a flawless data analysis solution - one with appropriate visuals, flexibility, and storytelling - that updates automatically, reflecting any changes in the source data in near real time, without the need for manual intervention. I’m a graduate Industrial Engineer and expert Data Analyst, ready to deliver streamlined solutions with interactive dashboards, automated ETL workflows, API integrations, and more. Even a single mistake in a measure’s formula can lead to costly errors. You don’t want to end up with a beginner analyst and get stuck with a mess - filters that don’t work, visuals that don’t update, broken calculations, measures that don’t respond to slicers, sluggish performance, charts that misrepresent the data, workflows that collapse under the slightest change, or worse - incorrect figures leading to bad decisions and a flawed strategy. That’s like hiring a fresher as your CFO: risky, costly, and hard to undo the damage. In any given case, there may be multiple ways to build a data solution, but an expert analyst identifies the optimal route - one that balances performance, maintainability, and scalability, while remaining agile enough for future enhancements with minimal hassle. That’s what you want. That’s what I offer. I specialize in crafting intuitive visualizations that highlight key trends and KPIs, empowering teams to make confident, data-driven decisions. My journey in data-driven decision making began 15+ years ago in the apparel industry, where I relied extensively on Excel, Pivot Tables, VBA, SQL, Google Sheets, and Apps Script for numerous reporting, analysis and data processing. Over time, I expanded into modern business intelligence and Python based data analysis, then transitioned to full-time freelancing, helping clients unlock the full potential of their data and drive measurable success. ✅ What I Offer 🔹 Interactive Dashboards – Power BI, Excel, Tableau, Looker Studio 🔹 Advanced Data Modeling & ETL Automation 🔹 Data Storytelling 🔹 Custom Reporting – KPIs, visuals, and conditional formatting 🔹 Automation – VBA, Google Apps Script, Power Automate 🔹 Database Development – SQL Server & MySQL 🔹 Basic Machine Learning (Python) & API Integration ✅ Tools & Technologies 🔹 Power BI (DAX, M Query, Dataflows) 🔹 Python (Pandas, NumPy, Matplotlib, Scikit-learn, Requests, APIs) 🔹 Excel (Power Pivot, Advanced Formulas, VBA) 🔹 SQL Server & MySQL