Certified CRM Developer & SaaS App Developer

Sadi Rahman

CRM Developer & SaaS App Developer

Certified Zoho CRM, HubSpot, Pipedrive and GoHighLevel (GHL) developer and web & mobile SaaS app developer from Dhaka, Bangladesh. With 9+ years of experience and 400+ completed projects as a Top Rated freelancer, I build CRM systems, API integrations and AI-powered business automation that save time and help sales teams close more deals.

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Hello, I'm

CRM, Integration & SaaS Services

CRM Development

Zoho CRM, HubSpot, Pipedrive and GoHighLevel setup, customization, pipelines, custom modules and Deluge functions built around your sales process.

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Integration & Automation

REST API integrations, workflow automation and AI agents with n8n, Zapier and Make that connect your CRM to forms, ads, accounting and email.

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SaaS App Development

Custom web SaaS platforms and mobile apps with secure dashboards, payments, roles and AI features, designed to launch fast and scale.

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ABOUT ME

Zoho, HubSpot, Pipedrive & GHL CRM Expert and SaaS Developer

Skills

I help startups, agencies and growing businesses replace manual work with a CRM that actually works. I start by understanding your business process, then design the CRM, integrations and automations that keep leads, deals and customers moving, with no spreadsheets or copy-paste.

ZOHO CRM & ZOHO ONE

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HUBSPOT CRM

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PIPEDRIVE & GOHIGHLEVEL

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API INTEGRATION & AI AUTOMATION

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Experience

Top Rated freelancer on Upwork with $100K+ earned, 400+ jobs and 297 client reviews, plus HubSpot Inbound, HubSpot Marketing Software and Google Ads certifications.

Hire Me View LinkedIn
  • Venty Digital — CEO Leading CRM implementation, SaaS and web app development projects for clients worldwide.
  • Amper Digital — Co-Founder Co-founded a digital agency delivering CRM automation, integrations and marketing systems.
  • Bricktop Marketing — Co-Founder Built marketing automation, funnels and lead management workflows for growing brands.
  • Upwork — Top Rated CRM Expert Zoho One, HubSpot, Pipedrive, Close and Freshsales setups, migrations and automations for 400+ projects.
WHAT I DO

CRM, Automation & SaaS Development Services

Zoho CRM Development & Customization

Custom Zoho CRM and Zoho One setup, Blueprints, Deluge functions and integrations built around your sales process.

HubSpot CRM Setup & Integration

HubSpot CRM setup, pipelines, lead scoring and workflows, integrated with your website, email and ad platforms.

Pipedrive CRM Setup & Automation

Pipedrive pipelines, custom fields and sales automation so every lead gets the right follow-up on time.

GoHighLevel (GHL) CRM & Funnel Automation

GoHighLevel funnels, workflows, SMS, calendars and snapshots that capture and nurture leads automatically.

API Integration & AI Workflow Automation

REST API, webhook, n8n, Zapier and Make integrations plus AI agents that remove manual data entry.

Web & Mobile SaaS App Development

Custom SaaS web apps and iOS/Android mobile apps with dashboards, payments, CRM sync and AI features.

CASE STUDIES

Recent CRM & SaaS Projects

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HubSpot CRM Integration with WordPress, Mailchimp & Jotform

HubSpot CRM connected to WordPress, Jotform and Mailchimp with lifecycle stages and source tracking.
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Website Form to Zoho CRM Integration

Real-time website and Wix form integration with Zoho CRM via API, with dedupe and assignment rules.
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AI CRM Builder SaaS Platform

Multi-tenant SaaS where AI agents help businesses build an industry-ready CRM in minutes.
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Zoho One & Zoho CRM Implementation

Phased Zoho One rollout: CRM modules, Blueprints, Zoho Forms and Campaigns in one connected workspace.
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Pipedrive CRM Setup & Sales Automation

Pipedrive pipeline with Zapier form intake, automated fee emails, SMS alerts and follow-up sequences.
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Zoho Marketing Automation Setup

Zoho Marketing Automation with CRM sync, lead scoring, nurturing journeys and team training.
CRM & AUTOMATION BLOG

Latest Insights

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  • October 27, 2026

How to Build a SaaS MVP: A Practical Guide for Founders

A practical guide to building a SaaS MVP: validating the idea, choosing must-have features, picking a tech stack,...

Read Full Article
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  • October 24, 2026

Zoho CRM Automation with Deluge: 8 Custom Functions That Save Hours

Eight practical Zoho CRM Deluge custom function ideas to automate data entry, calculations, integrations and follow-ups beyond standard...

Read Full Article
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  • October 21, 2026

CRM Integration Checklist: Connect Your CRM with Forms, Ads, Email and Accounting

A step-by-step CRM integration checklist for connecting Zoho, HubSpot, Pipedrive or GoHighLevel with website forms, ad platforms, email...

Read Full Article
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Google Reviews

What Clients Say

5.0★★★★★Based on 6 Google reviews
Read all on GoogleLeave a review
MM

Michael Martinenco

★★★★★

Sadi was very skilled and quick to help address some technical challenges we had with a hubspot template, he went deep into the source code, wrote new CSS code, tested compatability and also proactively suggested some graphical/textual changes to fully take advantage of the hubspot system. Excellent freelancer, our marketing department will use his him again whenever we need technical help. He's a true expert!

FI

Faheem Iftikhar Siddiqui

★★★★★

Sadi was fantastic to work with, fluent English so communication easy, knows everything about Zoho and delivers exactly what is required and on time, happy to make revisions when I changed the work, highly recommended.

ER

Eric Rubin

★★★★★

Sadi is a great CRM developer. He has been successfully configured our crm system and working it smoothly.

SD

Support DiscoverMyBusiness

★★★★★

Great effort with zoho one CRM integration with Clicksend. Hightly recommended. We will work with him long-term basis. Outstanding experience!

LR

LTH Reservations

★★★★★

He worked very quickly and well. He did everything I asked. He responded quickly and finished the project ahead of time. I can only recommend!

MZ

Michael zDube

★★★★★

Great experience working with Sadi. He is very knowledgeable and answered all my questions to help streamline my business

LET'S TALK

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