You will get Backend developer| Node.js | Express.js | Nest.js |Mongo DB
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Project details
I have 5+ years of experience in Back-end development, I specialize in building and maintaining powerful server-side applications, REST APIs, and full backend infrastructures for custom websites, web apps, and SaaS platforms.
🔧 Backend Development Services I Offer:
• Full backend architecture using Node.js, Express.js, and MongoDB/MySQL
• RESTful API development and third-party API integration
• Backend fixes, performance tuning, and code optimization
• Firebase backend services including Firestore, Authentication, and Hosting
• Secure user authentication using JWT, OAuth, and role-based access
• Scalable database design and integration (MongoDB, MySQL, Firebase)
• Server-side logic for real-time apps, admin panels, and dashboards
• Clean, maintainable, and well-documented codebases
💼 Tech Stack Expertise:
Backend & Server-side:
• Node.js, Express.js, Firebase,
• MongoDB, MySQL, PostgreSQL
• RESTful API, Authentication (JWT, OAuth2)
• Firebase Firestore, Realtime DB, Functions
My core focus is to help you scale and succeed by building robust backend systems that perform under load and grow with your business.
🔧 Backend Development Services I Offer:
• Full backend architecture using Node.js, Express.js, and MongoDB/MySQL
• RESTful API development and third-party API integration
• Backend fixes, performance tuning, and code optimization
• Firebase backend services including Firestore, Authentication, and Hosting
• Secure user authentication using JWT, OAuth, and role-based access
• Scalable database design and integration (MongoDB, MySQL, Firebase)
• Server-side logic for real-time apps, admin panels, and dashboards
• Clean, maintainable, and well-documented codebases
💼 Tech Stack Expertise:
Backend & Server-side:
• Node.js, Express.js, Firebase,
• MongoDB, MySQL, PostgreSQL
• RESTful API, Authentication (JWT, OAuth2)
• Firebase Firestore, Realtime DB, Functions
My core focus is to help you scale and succeed by building robust backend systems that perform under load and grow with your business.
Programming Languages
HTML & CSS, JavaScript, TypeScriptCoding Expertise
Cross Browser & Device Compatibility, Performance Optimization, DesignWhat's included
| Service Tiers |
Starter
$40
|
Standard
$150
|
Advanced
$200
|
|---|---|---|---|
| Delivery Time | 2 days | 4 days | 7 days |
Number of Revisions | 1 | 2 | Unlimited |
Number of Pages | 2 | 4 | 6 |
Design Customization | |||
Content Upload | |||
Responsive Design | |||
Source Code |
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VH
Vineetha H.
May 27, 2026
Fullstack Developer (React.js, Node.js, MySQL)
FC
Feng Lin C.
Mar 9, 2026
MERN Stack Developer Needed to Debug APIs and Fix Frontend Issues
Great experience working together. The developer demonstrated solid knowledge of the MERN stack and quickly identified and resolved the API and frontend issues. Communication was clear, and the fixes were delivered efficiently. I would be happy to collaborate again on future projects.
JT
Jannis T.
Mar 2, 2026
Full Stack Development
Loved working with Waseem. He's been super helpful, always on point, and always delivered great quality of work.
We've been working with him for a while now, and his work has been consistent and reliable from the start.
I highly recommend him to anyone needing a great full-stack developer.
We've been working with him for a while now, and his work has been consistent and reliable from the start.
I highly recommend him to anyone needing a great full-stack developer.
MA
Mr Ali A.
Feb 13, 2026
AI Developer (LLMs, APIs & Production AI Systems) - updates
I highly recommend this developer for any AI-related work. Professional, skilled, and reliable—looking forward to collaborating again in the future!
MA
Mr Ali A.
Feb 9, 2026
AI Developer Needed for LLMs and Production AI Systems
Strong opportunity for an AI developer experienced with LLMs and production-grade systems. Background in prompt engineering, model evaluation, RAG pipelines, and scalable deployment would be highly valuable. Emphasis on reliability, performance optimization, and real-world integration aligns well with modern AI product needs.
About Waseem
Email Marketing Specialist | Klaviyo, Mailchimp, ActiveCampaign
100%
Job Success
Okara, Pakistan - 1:37 pm local time
I build email marketing systems using Klaviyo, Mailchimp, and ActiveCampaign that turn subscribers into customers and one-time buyers into repeat buyers.
My work covers email marketing strategy, automation, campaigns, segmentation, deliverability, email design, and customer retention.
I do not build random newsletters or disconnected email sequences. I create structured email marketing systems that send the right message to the right person at the right time.
What I can help you with:
📧 Email Marketing Strategy
• Email marketing audits
• Customer journey planning
• Campaign calendars
• Retention strategy
• List growth strategy
• Performance tracking
• Revenue-focused recommendations
⚡ Email Automation and Flows
I build automated email flows for:
• Welcome sequences
• Abandoned cart recovery
• Browse abandonment
• Customer onboarding
• Post-purchase follow-up
• Cross-sell and upsell
• Review requests
• Lead nurturing
• Re-engagement
• Win-back campaigns
• Subscription reminders
• Product education
Each flow is built around customer behaviour, timing, segmentation, and a clear conversion goal.
🛍️ Klaviyo Email Marketing
I build and manage Klaviyo email marketing systems for e-commerce brands.
This includes:
• Klaviyo account setup
• Email flow strategy
• Ecommerce segmentation
• Campaign management
• Shopify integration
• Dynamic product blocks
• Revenue reporting
• A/B testing
• Deliverability improvement
• Customer retention flows
📨 Mailchimp Email Marketing
I create Mailchimp campaigns, automations, newsletters, templates, signup forms, and audience segments.
I can also clean and organise existing Mailchimp accounts, fix broken automations, improve contact structure, and create mobile-responsive email templates.
🔁 ActiveCampaign Email Marketing
I build ActiveCampaign automations for lead nurturing, customer onboarding, sales follow-up, tagging, segmentation, and lifecycle email marketing.
I use behaviour-based triggers, so contacts receive emails based on what they click, view, purchase, submit, or ignore.
🎨 Email Campaigns and Design
I create clear, mobile-responsive email campaigns that match your brand and guide readers toward one main action.
My work includes:
• Promotional campaigns
• Product launches
• Newsletters
• Educational sequences
• Seasonal campaigns
• Sales announcements
• Branded email templates
• Email copy and calls to action
🎯 Segmentation and Personalisation
Strong email marketing does not send the same message to everyone.
I segment audiences based on:
• Purchase history
• Engagement level
• Website behaviour
• Customer lifecycle stage
• Product interest
• Location
• Lead source
• Subscription status
This helps improve relevance, engagement, conversions, and customer retention.
📬 Deliverability and List Health
I improve the foundation of your email marketing through:
• List cleaning
• Engagement-based segmentation
• Suppression management
• Spam-risk reduction
• Domain authentication guidance
• Bounce monitoring
• Sender reputation checks
• Unengaged subscriber management
🔗 API and System Integrations
I connect email marketing platforms, forms, calendars, databases, Airtable, Google Sheets, AI models, and custom applications using REST APIs, webhooks, and real-time data flows.
When standard email marketing tools are not enough, I can also build lightweight full-stack dashboards, admin panels, customer portals, custom forms, and email marketing control interfaces
🧰 Platforms and Tools
Klaviyo • Mailchimp • ActiveCampaign • Omnisend • MailerLite • ConvertKit • HubSpot • Shopify • WooCommerce • Zapier • Make,com • Canva • Figma • HTML Email
You will receive an email marketing system designed to improve engagement, recover lost sales, support customer retention, and generate more value from your existing audience.
📩Send me your website, current email platform, list size, and main goal. I will review your setup and recommend the highest-impact improvements for your Klaviyo, Mailchimp, or ActiveCampaign account.
Steps for completing your project
After purchasing the project, send requirements so Waseem can start the project.
Delivery time starts when Waseem receives requirements from you.
Waseem works on your project following the steps below.
Revisions may occur after the delivery date.
Gather Requirements & Plan Architecture
Understand the project scope, define required endpoints, database schema, and integration needs.
Develop Backend Logic & APIs
Build secure RESTful APIs, integrate databases, implement authentication, and handle business logic using Node.js and Express.