Hire the Best Mailgun Developers

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Mariusz O.

Opole, Poland

$27/hr
4.9
4,744 jobs

I'm an Email Developer and Email Marketing Strategist with a programming background in AI-powered automation and system architecture. With 15+ years of experience, 4,000+ projects delivered for 1,900+ clients worldwide, I build production-ready email systems - not just templates - combining clean HTML/CSS, lifecycle automation, marketing strategy, deliverability expertise, and AI-driven workflows under one roof. Top Rated Plus on Upwork with $700K+ in earnings. What I do: 1. Email Development (Core) Custom HTML/CSS email builds - mobile-responsive, dark-mode-ready, cross-client tested. I work across Mailchimp, HubSpot, Salesforce / Pardot, Marketo, Klaviyo, ActiveCampaign, Campaign Monitor, SendGrid, and Iterable. In 2015, Mailchimp recognised me for identifying and fixing critical rendering bugs in their templates. Certified Mailchimp Partner. 2. Email Marketing Strategy & Execution End-to-end email marketing - audits, campaign planning, segmentation, lifecycle automation (welcome, nurture, re-engagement, winback), A/B testing, and performance optimisation. I build scalable, compliant email programs with predictable long-term performance. I handle both strategy and execution end-to-end. 3. AI Architecture & Intelligent Automation I build AI-powered audit and automation systems connected directly to your ESP/CRM via MCP servers. AI analyses your flows, campaigns, deliverability, and engagement data in real time - producing structured audit reports and prioritised fix lists. Examples: automated Klaviyo flow audits with copy rewrites, real-time deliverability monitoring, and engagement scoring. I also build RAG MCP servers that let AI reference your internal docs, brand guidelines, and performance history during audits and content generation. 4. Front-End & Automation Development Custom applications, internal tools, dashboards, and integrations using JavaScript, Python, React, Google Apps Script, and n8n. I connect CRMs, ESPs, databases, Google Sheets, and APIs into unified automated workflows. Core services: ★ Custom email development (HTML/CSS, dark mode, responsive, cross-client) ★ Email marketing strategy, audits & campaign execution ★ AI-powered ESP/CRM audits via MCP server integration ★ RAG MCP servers for context-aware AI recommendations & content generation ★ Lifecycle automation (welcome, onboarding, nurture, re-engagement, winback, lead scoring) ★ Deliverability setup & troubleshooting (SPF, DKIM, DMARC, sender reputation) ★ Segmentation strategy (openers, clickers, inactive users, RFM, predictive) ★ A/B testing, reporting & performance optimisation ★ Advanced ESP customisation (HubSpot HubL, Salesforce AMPscript, Marketo Velocity) ★ AI agents & n8n automation systems ★ CRM & ESP integrations (HubSpot, Salesforce, Marketo, Mailchimp, Klaviyo, ActiveCampaign) ★ Custom Google Sheets & Apps Script solutions (dashboards, triggers, integrations) ★ API-based integrations & webhook workflows ★ Cross-client email testing (Litmus, Email on Acid, dark mode, Outlook VML fixes) Why work with me: ★ 15+ years in email development and email marketing ★ 4,000+ projects for 1,800+ clients (Microsoft, Netflix, Unilever, Toyota, Adobe, BBC, Meta, Amazon Prime Video, TikTok, Adidas, Sony, Coca-Cola, Hyundai, LG, Renault, Bayer, 3M, and more) ★ Member of 32 Upwork Talent Cloud groups (Enterprise Professionals, Microsoft UTC, Netflix Print Production, Unilever, Tata Communications, Holland & Barrett, Janus Henderson, and others) ★ AI-powered audit and automation capabilities (MCP + RAG architecture) ★ End-to-end ownership - strategy, development, execution, optimisation ★ Clean, maintainable code and scalable architecture Certificates: HubSpot Marketing Software, HubSpot Email Marketing, HubSpot Contextual Marketing, Mailchimp Email Automations, Mailchimp Foundations, Python (Alison), Salesforce for Admins, Managing DNS, Advanced CSS Media Queries, Google Ads Measurement. Skills: HTML5, CSS, Email Development, Email Deliverability, AMPscript, HubSpot HubL, Marketo Velocity, JavaScript, Python, React, Google Apps Script, n8n, APIs & Webhooks, MCP Servers, RAG Architecture, AI Agents, Marketing Automation, CRM Integrations I use AI as a development and analysis accelerator - speeding up coding, testing, auditing, and iteration - while maintaining full control over architecture, logic, and production quality. Availability: ★ Mon–Thu: 3:00 AM – 11:00 AM EST, 3:00 PM – 7:00 PM EST ★ Friday: 3:00 AM – 11:00 AM EST

  • HubSpot
  • Mailchimp
  • Pardot
  • Marketo
  • HTML5
  • Salesforce
  • Email & Newsletter
  • Email Marketing
  • Email Template
  • SendGrid
  • CSS
  • Email
  • Google Cloud Platform
  • Google Apps Script
  • AI Agent Development
Basant K.

Gurgaon, India

$15/hr
5.0
6 jobs

🚀 Bringing Your Ideas to Life with a Visionary Full Stack Developer Hi there! I’m Basant Kumar Singh, a passionate Full Stack Developer with over 12 years of experience in transforming groundbreaking ideas into seamless, high-performance web applications. My focus is on delivering flawless user experiences and robust backend solutions that not only meet but exceed your expectations. Whether you're looking for cutting-edge technology or a partner to scale your web applications, I have the expertise to bring your vision to life. 🔧 What I Can Do for You: Scalable Backend Solutions: Mastery in Node.js, Nest.js, SpringBoot (Java), PHP (Laravel), Python, AWS Lambda, and GraphQL ensures the creation of highly efficient and scalable server-side applications tailored to your needs. Cloud Services Expertise: Leverage the power of AWS (EC2, S3, Lambda, RDS, DynamoDB, CloudFront) to build secure, reliable, and scalable applications that grow with your business. I also work with Azure, Google Cloud, and DigitalOcean for flexible deployment options. Advanced Search & Analytics: Integrate Elasticsearch and Kibana to provide fast, accurate search functionality and powerful data analytics that give you insights into user behavior and application performance. Dynamic Frontend Development: Craft intuitive, responsive interfaces with React.js, Next.js, Vue.js, HTML, and CSS. I also excel with Tailwind CSS, Bootstrap, and Material UI to create visually appealing, user-friendly designs. High-Performance Data Management: Expertise with MongoDB, DynamoDB, MySQL, PostgreSQL, and Firebase/Firestore, ensuring your data is handled securely and efficiently. Optimized Caching & Messaging: Use Redis for ultra-fast data caching and integrate RabbitMQ and Kafka for robust, scalable messaging systems—perfect for building real-time, high-volume applications. End-to-End Testing Excellence: I rigorously test with tools like JEST, Mocha, and Puppeteer to ensure your application runs smoothly and performs flawlessly across all devices. 💡 Why You Should Work with Me: Proven Client Satisfaction: I’m proud of my track record with 100% client satisfaction—my clients love the quality, efficiency, and reliability I bring to every project. Innovative Problem Solver: I approach each challenge with creativity and precision, ensuring you get a solution tailored to your unique needs. Forward-Thinking: Always staying up-to-date with the latest industry trends and technologies, I guarantee solutions that are modern, scalable, and future-proof. Collaborative & Transparent: I believe in building strong relationships through clear communication, collaboration, and a shared vision for success. 🌟 What You Can Expect from Me: Whether it's building a custom solution, optimizing your web performance, or streamlining your backend infrastructure, my approach is client-centric. I aim to add real value to your project while providing a seamless experience from start to finish. Let’s Bring Your Project to the Next Level! I’m excited to help you turn your ideas into reality. Reach out today, and let’s discuss how I can contribute to the success of your next big project! Warm regards, Basant Kumar Singh 😊

  • PHP
  • React
  • Node.js
  • Laravel
  • Web Development
  • Next.js
  • Spring Boot
  • Elasticsearch
  • Redis
  • MongoDB
  • PostgreSQL
  • MySQL
  • Apache Kafka
  • Docker
  • DigitalOcean
MD Masud R.

Khulna, Bangladesh

$20/hr
4.8
784 jobs

I create high-impact HTML email templates and clickable HTML email signatures that are responsive, dark mode-ready, and fully compatible with Gmail, Outlook, Apple Mail, and mobile devices, helping your emails look professional and perform perfectly. Hi, I’m Masud Rana. I focus on client needs, cross-platform compatibility, and seamless delivery, ensuring your email templates and signatures are ready to use and hassle-free. Whether it’s marketing campaigns, transactional emails, or team-wide signature setups, I provide solutions that are efficient, visually striking, and fully functional. ✅ HTML Email Signature Design • Professional, clickable, editable, and responsive HTML email signatures • Includes links, logo, contact details, and social media icons • Cross-client compatible: Gmail, Outlook, Outlook 365, Apple Mail, iPhone, HubSpot, Webmail • Optimized for desktop & mobile devices • Step-by-step video installation guide included for easy setup ✅ Professional Email Signature Generator: ✔ Team-ready email signature system: Easily generate and manage customized signatures for all employees, fully hand-coded for compatibility across Gmail, Outlook, Apple Mail, and mobile devices ✅ HTML Email Template Development: ✔ Full-service HTML email solutions from responsive templates to dynamic campaigns, optimized for every major client and device. • Custom, responsive HTML email templates for marketing, transactional, and eCommerce purposes • Convert PSD, Figma, Sketch, XD, or PDF designs into email-ready HTML • Dark-mode safe and optimized for desktop, mobile, and tablet devices • Cross-client compatible: Gmail, Outlook, Office 365, Apple Mail, Yahoo, and more • Integration with major ESPs: MailChimp, Campaign Monitor, Marketo, ActiveCampaign, HubSpot, Klaviyo, AWeber, Constant Contact, GetResponse, etc. • Troubleshooting and fixing rendering issues in existing templates • Dynamic content creation: RSS newsletters, personalized campaigns, and email signature generators ✅ Why Choose Me? ✔ HTML email specialist ✔ Cross-client & dark-mode safe designs ✔ Fast delivery & clear communication ✔ Quality and client satisfaction first Ready to upgrade your email templates and signatures? I deliver responsive, cross-client compatible HTML email solutions with fast turnaround and professional support. Let’s connect and bring your email designs to life! Best regards, Masud Rana (Ridoy)

  • Graphic Design
  • Email Marketing
  • Email Deliverability
  • Email Signature
  • Email Template
  • Mailchimp
  • Email Design
  • Conversion to HTML
  • PSD to HTML
  • Email Template Development
  • Responsive Design
  • Email Communication
  • Email Support
  • HTML
  • CSS
Sava S.

Zitkovac, Serbia

$40/hr
4.9
689 jobs

Hi, I'm Sava, an Email Marketing Specialist with over 15 years of experience in email design, development, and automation. I help brands create high-performing email campaigns and automated flows by combining professional design, advanced HTML email development, and deep expertise in platforms like Klaviyo, HubSpot, Salesforce, and other leading CRMs. What I can help you with: • Full email marketing management using Klaviyo, Mailchimp, HubSpot, Salesforce, Listrak, SendGrid and other leading CRM platforms. • Professional email design in Figma. • HTML email development: * Hand-coded HTML emails * Drag-and-drop email builders * Modular and reusable email templates * Custom emails that go beyond the limitations of standard email builders • Email campaigns and automations: * Welcome Series * Abandoned Cart & Checkout * Browse Abandonment * Shipping & Transactional Emails * Post-Purchase * Upsell & Cross-sell * Win-back & Re-engagement * Complete customer lifecycle flows • Account setup and optimization: * Forms and popups * Lists and segmentation * Deliverability and sender reputation * Domain authentication (SPF, DKIM, DMARC) * Analytics and reporting * A/B testing • Email QA and testing: * Email on Acid testing * Responsive layouts * Dark mode optimization * Outlook rendering fixes * Cross-client and cross-device compatibility If you're looking for a reliable partner to handle your email marketing from A to Z — from design and development to automation and optimization — feel free to get in touch. I’m always open to discussing new projects and helping brands improve their email performance. Best regards, Sava Stankovic

  • Adobe Photoshop
  • Email Design
  • HubSpot
  • PSD to Mailchimp
  • Email Marketing
  • Email Automation
  • Email Testing
  • Mailchimp
  • Email & Newsletter
  • Klaviyo
  • Email Template Development
  • Email Campaign
  • Email Template
  • Email
  • Figma
AAmir R.

Jahanian, Pakistan

$25/hr
4.9
384 jobs

📧 Want your emails to look clean, professional, and consistent across every platform? I can help. I’m Aamir, an HTML Email Designer and Email Signature Specialist with over 5 years of experience helping businesses upgrade their communication with responsive, reliable, and beautifully branded email designs. Whether you need a custom HTML signature, a full email template, or a complete team signature setup, I make the process smooth and hassle-free. ✨ Here’s what I’m great at: ✔ Custom email signatures that match your brand and work in Gmail, Outlook, Apple Mail, and mobile ✔ HTML email templates for Klaviyo, Mailchimp, HubSpot, Brevo, and other ESPs ✔ Converting Figma designs into accurate, clean HTML ✔ Setting up company-wide, editable signature systems for teams ✔ Ensuring perfect compatibility across all major email clients ✔ Writing clean, stable HTML that renders correctly everywhere My goal is simple: to help you present your brand professionally and make your emails look as polished as your business. If you want a designer who understands rendering issues, client limitations, and real-world email challenges, you’re in the right place. 📩 Let’s work together to create emails and signatures that truly stand out. Send me a message—your next great email design starts here. 🚀

  • Email & Newsletter
  • Email Signature
  • HTML5
  • CSS 3
  • PSD to HTML
  • PSD to Mailchimp
  • Email Marketing
  • Microsoft Outlook
  • Email Design
  • Email Campaign Setup
  • HTML Newsletter
  • Email Template
  • Klaviyo
  • Mailchimp
  • Marketing Automation
  • Email Deliverability
Jamilur R.

Dhaka, Bangladesh

$25/hr
5.0
132 jobs

I'm a solutions-driven Systems & Email Infrastructure Engineer with 9+ years of hands-on experience across Linux server administration, cloud platforms, and mail systems. I help businesses build infrastructure that's stable, secure, and scalable, as well as email systems that actually land in the inbox. 🖥️ Systems & Cloud Administration ● Linux Server Management - Ubuntu, CentOS, Debian, RHEL ● Virtualization - Proxmox, VMware/ESXi (including VM migrations & troubleshooting) ● Cloud Platforms - AWS, GCP, Cloudflare ● Container Orchestration - Kubernetes ● Web & App Stack - NGINX, Apache, SSL/TLS, MySQL, PHP, WHM/cPanel ● Networking - DNS, RADIUS ● Automation - Shell scripting 📧 Email Infrastructure & Deliverability ● Mail Server Setup & Optimization - Postfix, Exim, PowerMTA, Postal, Google Workspace, Microsoft 365, GHL, ActiveCampaign ● Deliverability Engineering - SPF, DKIM, DMARC, BIMI, PTR, IP/domain reputation, IP rotation ● IP/Domain Warm-up - fast, safe ramp-up strategies ● Cold Email Systems - Smartlead, Instantly, MailWizz, Mautic ● Spam Troubleshooting & Blacklist Monitoring - root-cause diagnosis, 100% inbox-placement focus ● Zero-Downtime Email Migrations - between Google Workspace, Microsoft 365, cPanel, and other platforms ● Email List Cleaning, Campaign Automation & Sequencing Whether you need a server stood up and hardened, a Kubernetes cluster running smoothly, or a mail system that consistently hits the inbox, I bring the same approach: diagnose the root cause, fix it properly, and document it so it stays fixed. I offer a free initial consultation to understand your setup and goals, then propose a tailored plan - no generic templates. *** Primary Goal: 100% Client Satisfaction ***

  • Linux System Administration
  • Amazon Web Services
  • Kubernetes
  • Server Virtualization
  • Proxmox VE
  • DNS
  • Email Deliverability
  • cPanel
  • Postfix SMTP Server
  • NGINX
  • WordPress
  • Mail Server Implementation
  • Cold Email
  • VMWare
  • Email Marketing
  • Google Cloud Platform

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