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Hi, I am Mamun — I specialize in email deliverability and DNS: setting up and fixing DNS authentication records (SPF, DKIM, DMARC), configuring Google Workspace and Microsoft 365 for cold outreach, warming up sending domains, removing blacklists, handling email migration, and diagnosing why emails land in spam. I work with Google Workspace, Microsoft 365, Outlook, Brevo, Instantly, Smartlead, and major domain providers to resolve send/receive errors and improve long-term email reputation. WHAT I FIX & SET UP 1. Email Deliverability & Spam Fix:- • Fix emails landing in spam, junk, or promotions. I configure and align SPF, DKIM, DMARC, and MX records, improve inbox placement, and recover domain reputation. 2. Cold Email Infrastructure • Domain warm-up strategy & sending reputation setup • Instantly, Apollo, Smartlead, Brevo, Mailchimp configuration • Multi-domain sending infrastructure • Cold outreach deliverability audits 3. Google Workspace & Microsoft 365 Email Setup:- • Email setup, troubleshooting, and optimization for Google Workspace, Microsoft 365, and Outlook, including authentication and sending/receiving issues. 4. Microsoft 365 & Other Providers • Microsoft 365 / Outlook setup & troubleshooting • Zoho Mail, cPanel mail configuration • SMTP gateway & WordPress SMTP setup for Form Submission 5. DNS Setup & Email Authentication:- • Full DNS setup and cleanup including TXT, MX, CNAME records across GoDaddy, Namecheap, Cloudflare, Zoho, cPanel, and other providers. 6. Email Migration & Deliverability Support:- • Secure email migrations between Google Workspace ↔ Microsoft 365, and from IMAP or cPanel servers, with zero data loss and minimal downtime while preserving deliverability. 7. B2B Lead Generation & List Building: • Prospect research and targeted lead list building using Apollo. io and LinkedIn Sales Navigator • Email list verification and enrichment • Cold email campaign setup — sequence, follow-up, and sending strategy • ICP (Ideal Customer Profile) targeting for B2B outreach WHY CLIENTS CHOOSE ME ✔ Deep technical expertise — not just surface-level fixes ✔ Actionable audit reports with clear recommendations ✔ Fast turnaround on authentication & domain issues ✔ Clear communication throughout — no technical jargon dumps ✔ Long-term infrastructure thinking, not just one-off patches If you’re dealing with spam issues, SPF/DKIM/DMARC errors, DNS problems, or email deliverability failures, I’m ready to help you fix them properly and keep your email system stable long term. Best regards, Mamun

Note: I recently returned to Upwork after 12 years working full-time as a certified PMP Project Manager and CTO. Though my profile looks new, I bring 13+ years of proven experience in software development, product delivery, and team leadership. I’m committed to delivering top-tier service here on Upwork once again. PMP-certified Technical Project Manager with 13+ years’ experience leading cross-functional teams in remote/hybrid setups. Proven in SaaS, EdTech, and AI delivery using Agile & DevOps, cutting cycle times by 30% and scaling high-performing global teams. Skilled in stakeholder alignment, sprint planning, and MVP delivery from 0→1, generating $ 2 M+ in revenue. 🔹 Project Leadership Led full Software Development Life Cycle (SDLC) projects with expertise in risk management, stakeholder communication, and delivery excellence using PMP, Agile, and Scrum frameworks. 🔹 Product Development Successfully launched multiple 0→1 MVPs across SaaS, EdTech, and AI domains. Skilled in sprint planning, backlog grooming, and iterative delivery aligned with product goals. 🔹 Remote Team Management Built and managed cross-functional remote teams of 150+ engineers. Trained over 100 professionals in Agile methodologies and SDLC best practices across multiple time zones. 🔹 Tech Stack Expertise Proficient in Java, JavaScript (React.js, Node.js), PHP, Swift, Flutter, RESTful APIs, and Firebase – capable of understanding and contributing across the tech spectrum. 🔹 Tools & DevOps Hands-on experience with Jira, Trello, GitHub, Docker, AWS, and CI/CD pipelines to ensure smooth development, testing, and deployment workflows. 🔹 Operational Execution Specializing in roadmap development, milestone tracking, conducting Scrum ceremonies, and coordinating with vendors and offshore teams for timely project execution. Key Achievements: - Scaled Team: Trained 100+ professionals in PMP, Agile, Scrum, Android & SDLC, boosting productivity by 40%. - Leadership: Led 150+ engineers (Full-Stack, DevOps, SQA, UI/UX, Product Owners) with 98% on-time completion. - Talent Acquisition: Recruited 50+ engineers (screening → onboarding), reducing hiring time by 30% - Top-Performing Teams: Won 2x "Best Team" awards for innovation and execution under tight deadlines. - Product Innovation: Launched 4 MVP products from concept to market, driving $2M+ in revenue.

I help businesses automate workflows, extract data, and build AI-powered systems using Python and modern backend tools. My work spans AI integration, automation, and backend system design, with a strong emphasis on reliability, clarity, and real-world usability. I don’t deliver throwaway scripts-I build systems that teams can operate, extend, and trust. I have experience designing data pipelines, automation workflows, and AI-assisted systems that integrate cleanly with existing tools and processes. My approach balances technical correctness with practical business needs, ensuring solutions remain maintainable over time. Based in Tokyo, Japan, I work with a Japanese software engineering company delivering production systems used by real users across data analytics, automation, and AI-driven workflows. I value clear communication, structured delivery, and long-term ownership.

I am an expert AI/ML Engineer with hands-on expertise in Machine learning, Deep Learning, Computer Vision, NLP, Generative AI, and LLMs. I leverage advanced techniques to deliver innovative and impactful AI solutions for your needs. Areas of expertise: ✅ Machine Learning (Data Analysis and Visualization, Classification, Regression models, Predicting with Supervised, Unsupervised Techniques) ✅ Deep Learning (Deep Neural Networks, Transfer Learning, fine-tuning models, XAI, optimization, exploring models) ✅ Computer Vision and Image Processing (Object detection/segmentation/tracking, Image/Video classification, Image generation, OCR) ✅ NLP (Text classification, Topic modeling, NER, Semantic similarity, Text generation, Question Answering) ✅ Generative AI (Fine-tuning LLMs, RAG, Prompt Engineering, embeddings, vector database, Chatbots and AI Assistants) ✅ Audio Data Analysis (Audio classification, Sound segmentation, TTS, STT) Tech Stack: ✅ ML/DL tools: TensorFlow, Keras, PyTorch, Scikit-Learn, XGBoost, LightGBM, CatBoost ✅ NLP: LangChain, OpenAI(GPT-4, Embeddings, ChatGPT), Local LLMs, Huggingface, Gemini, NLTK, Textblob ✅ Computer Vision: Ultralytics, OpenCV, Pillow, Scikit Image, YOLO, Detectron2, OpenPose ✅ Data Analysis/Visualization Tools: Pandas, NumPy, Matplotlib, Seaborn, Plotly, Altair ✅ Cloud services: AWS, Google Cloud, Azure ✅ Project Management and Version Control: Git, GitHub ✅ MLOps: MLFlow, Docker, Github actions, Airflow, DVC ✅ Deployment: StreamLit, Flask, FastAPI ✅ Languages: Python My commitment to excellence and continuous learning ensures that I stay at the forefront of AI/ML advancements. Let’s connect to explore how I can contribute to your AI/ML projects and help you achieve your business goals with cutting-edge solutions.

🚀 Senior QA Engineer | Manual Testing | Mobile App Testing | Web Testing | Test Automation I help companies release software with confidence by finding critical issues before their users do. With 10+ years of experience in Software Quality Assurance, I have tested over 100 applications across Mobile, Web, SaaS, AI, FinTech, Blockchain, Healthcare, E-commerce, CRM, ERP, and Enterprise platforms. My goal is simple: deliver reliable, stable, and user-friendly products through thorough testing and detailed quality analysis. 𝗖𝗢𝗥𝗘 𝗤𝗔 𝗦𝗘𝗥𝗩𝗜𝗖𝗘𝗦 • Manual Testing • Functional Testing • Regression Testing • Exploratory Testing • User Acceptance Testing (UAT) • Mobile App Testing (iOS & Android) • Web Application Testing • Cross-Browser Testing • Cross-Platform Testing • API Testing • Smoke & Sanity Testing • Compatibility Testing • Performance Testing • Automation Testing • Test Planning & Strategy • Test Case Design & Execution • Bug Reporting & Defect Tracking 𝗧𝗘𝗖𝗛𝗡𝗢𝗟𝗢𝗚𝗜𝗘𝗦 & 𝗧𝗢𝗢𝗟𝗦 Selenium • Appium • Postman Jira • Linear • Trello • ClickUp • Asana • Monday • Notion Agile • Scrum • SDLC • STLC 𝗜𝗡𝗗𝗨𝗦𝗧𝗥𝗜𝗘𝗦 • SaaS • Artificial Intelligence (AI) • Blockchain & Web3 • FinTech • Healthcare • E-commerce • Education Technology • Travel & Hospitality • CRM & ERP Solutions 𝗥𝗘𝗔𝗟 𝗗𝗘𝗩𝗜𝗖𝗘 𝗧𝗘𝗦𝗧𝗜𝗡𝗚 I maintain a large collection of real Android, iOS, Windows, and macOS devices, allowing me to validate applications in real-world environments instead of relying solely on simulators and emulators. 𝗪𝗛𝗔𝗧 𝗬𝗢𝗨 𝗖𝗔𝗡 𝗘𝗫𝗣𝗘𝗖𝗧 ✓ Detailed and actionable bug reports ✓ Clear communication throughout the project ✓ Thorough exploratory testing ✓ Fast turnaround times ✓ Reliable regression coverage ✓ Quality-focused release validation ✓ Strong attention to user experience and product stability Whether you need a QA partner for a startup MVP, a growing SaaS platform, a mobile application, an AI product, or an enterprise system, I can help ensure your software meets the highest quality standards. Let's build software that users trust and enjoy using.

🔥 Having 8+ year of experience, i worked on complex web applications like the 𝗪𝗮𝘀𝗵𝗶𝗻𝗴𝘁𝗼𝗻 𝗗𝗖 𝗚𝗼𝘃𝗲𝗿𝗻𝗺𝗲𝗻𝘁's artist competition system. I deliver scalable web application with PHP-Laravel and JavaScript-MERN including cloud deployments (AWS/VPS/Cpanel). 💡 𝗖𝗼𝗿𝗲 𝗘𝘅𝗽𝗲𝗿𝘁𝗶𝘀𝗲: ✅ Full-Stack Web Design and Development: 8+ years in Laravel for web application development and 3 years of Experience in MERN(MongoDB, Express.js, React.js, Node.js) Stack Development. ✅ AI/ML Integrations: Built ChatGPT/Gemini/Claude/Veo-powered apps, chatbot,AI Agent predictive models, and automation tools. ✅ Theree.js & WebGL based 3D web application Development ✅ End-to-End Solutions: From BRD/SRS to UI/UX design to Fronted Design to Back-end development, Cloud Deployment (AWS/Azure/VPS/Cpanel), and ongoing maintenance. ✅ Team Leadership: 12+ devs for scalable, secure, and compliant solutions (HIPAA, Gov standards). 🚀 𝗦𝗼𝗰𝗶𝗮𝗹 𝗣𝗿𝗼𝗼𝗳 & 𝗠𝗲𝘁𝗿𝗶𝗰𝘀: ⚡️120+ projects | Top-Rated on Upwork. ⚡️Washington DC Government project: Scalable SaaS app with 99.9% uptime and ongoing long-term support. 📩 Need a high-performance web/mobile app? Message me to discuss your project—I handle everything from Business Requirement Document(BRD)/ Software Requirement Specification(SRS) writing to Designing Frontend to developing backend development to deploying the project in a secured server to Long Term Support & Maintenance!