What are your pricing models for custom software projects?

I offer fixed-price milestones for well-defined scope (MVP features, integrations, admin modules) and hourly contracts for ongoing or evolving work. Small tasks often start from $500 to $2,000. SaaS MVPs and custom platforms typically range from $5,000 to $25,000+ depending on scope. Enterprise ERP, fintech, or multi-module systems are quoted after a discovery call. All contracts can run through Upwork or Fiverr escrow, or direct invoice for repeat clients.

What is your hourly rate?

Hourly rates vary by project complexity, timeline, and engagement length. Long-term or retainer work is priced lower than short urgent sprints. I share exact rates on Upwork and in proposals after understanding your stack, scope, and deadline. Book a free 30-minute call to get a tailored estimate.

How long does a typical project take?

Timelines depend on scope. API integrations or single modules: 1 to 3 weeks. SaaS MVP with auth, dashboard, and core workflows: 6 to 12 weeks. ERP, CRM, or fintech internal platforms: 3 to 6+ months. I break work into 1 to 2 week milestones with staging demos so you see progress early and can adjust scope without surprises.

What is your development process from hire to launch?

Discovery call, written proposal with milestones, agreement via Upwork/Fiverr or direct contract, then agile sprints with code reviews and staging previews. You get regular updates (daily or weekly), demo calls at each milestone, and full handoff with documentation, deployment support, and optional maintenance.

How do I start a project with you?

Choose any path: hire on Upwork, order a Fiverr gig, book a free Calendly call, or email rifatul.dev@gmail.com with your brief. Share goals, existing codebase (if any), deadline, and budget range. I reply within 24 hours with next steps or clarifying questions.

Can I hire you through Upwork or Fiverr?

Yes. I am Top Rated on Upwork with 100+ completed projects and also active on Fiverr. Marketplace hire gives you escrow protection, reviews, and a familiar workflow. Your project gets the same delivery standard whether you hire via marketplace or direct contract.

What types of projects do you build?

I take web and SaaS products, ecommerce, mobile apps, workflow automation, and API integrations, from a raw brief or an MVP through production. AI work covers model APIs, RAG, agents, and industry workflows inside the product. I also join an existing codebase for the next release. Case studies cover a document RAG/MCP system, an AI SaaS launch, a fintech ops platform, and an SMS product with Twilio and CRM integrations.

Which technologies do you use?

AI and product backends: Node.js, NestJS, TypeScript, PostgreSQL, Redis, queues, and OpenAI or Anthropic APIs. Retrieval and agents sit on that same stack, often with MCP. Integrations use REST, webhooks, and OAuth. Production runs on Google Cloud, AWS, Cloudflare Workers, Docker, and CI. Laravel and Next.js show up when the existing product already uses them.

How do you communicate and what timezone are you in?

Based in Dhaka, Bangladesh (GMT+6), available for worldwide remote work. I work async-friendly with Slack, email, Upwork messages, or video calls. Overlap with US and EU hours is possible for standups and demos. English is my primary client language.

Do you provide support after launch?

Yes. Every project includes deployment handoff and documentation. Optional post-launch support covers bug fixes, monitoring, feature iterations, and DevOps. Many clients continue on hourly retainers or milestone-based enhancement sprints.

Can you work with an existing codebase or team?

Absolutely. I regularly join existing Laravel, Node.js, or Next.js codebases, fix technical debt, add features, and integrate with in-house or offshore teams. I follow your Git workflow, code standards, and CI/CD pipeline.

Will you sign an NDA and who owns the code?

NDAs are standard for client work. Upon full payment, you own the custom code and deliverables we build for your project. Third-party libraries remain under their respective licenses. Marketplace and direct contracts both support IP assignment terms.

SMS Marketing

Twilio

Cloudflare Workers

React

ActiveCampaign

10DLC

Marketing Automation

Multi-Brand SMS Automation Platform Case Study

Production blasts with analytics that match Twilio

Built a full-stack SMS marketing platform for a wellness brand: React dashboard on Cloudflare Pages, Worker API with queues, ActiveCampaign tag audiences, and 10DLC-compliant Twilio routing. Fixed analytics drift so replies and opt-outs matched Twilio Insights on a 2,383-contact blast.

Role: Full-Stack Engineer
Timeline: 2025 to 2026
Client: Wellness brand (Spellsology deployment)
Stack: React
TypeScript
Cloudflare Workers
Twilio
ActiveCampaign
KV
Queues

View live dashboard

The Problem

A wellness brand needed to run SMS blasts to thousands of contacts across multiple product lines. The first version worked for sending, but marketing could not trust the numbers after a blast finished.

Dashboard metrics did not match Twilio Insights after large sends, so teams could not trust reply and opt-out counts
10DLC compliance and routing had to be correct per brand before scaling production blasts
No reliable post-blast reconciliation: staff exported CSVs and compared Twilio manually after every campaign
Multiple brands needed separate Twilio and ActiveCampaign configs without running separate admin tools
Bulk SMS required queue-based sending, per-number status, and failure diagnostics, not one fire-and-forget API call

The Solution

I built a multi-brand SMS admin on Cloudflare: React frontend, Worker API, queue-based Twilio sends, ActiveCampaign tag audiences, and webhook-driven status updates. The key fix was Twilio sync so dashboard analytics match Twilio Insights after every production blast.

Marketing admin (React on Cloudflare Pages)
              |
              v
    Cloudflare Worker API (auth, brands, campaigns)
              |
     +--------+---------+
     |                  |
     v                  v
ActiveCampaign      Cloudflare Queue
(tag audiences)          |
                         v
                   Twilio SMS API
                         |
              delivery + inbound webhooks
                         |
                         v
              KV status + dashboard analytics

Multi-brand admin: per-brand Twilio credentials, ActiveCampaign tags, and audience counts in one React dashboard
Cloudflare Worker API with KV storage and Queue consumers for rate-safe, retry-friendly outbound SMS
Twilio delivery webhooks plus inbound STOP handling to update per-phone status in near real time
One-click Sync with Twilio to pull authoritative reply and opt-out totals after each blast
Campaign detail views with failure diagnostics, retry for single numbers or full failed batch
Timezone-aware scheduling, Gmail-style campaign list, and secure admin auth on all API routes

Before and After

Before	After
Reply and opt-out counts drifted from Twilio after large blasts	33 replies and 25 opt-outs matched Twilio Insights on a 2,383-contact send
Post-blast reconciliation via manual CSV exports	One-click Sync with Twilio on campaign detail
Separate tools per brand for Twilio and ActiveCampaign	Single multi-brand admin with per-brand config and tags
Fire-and-forget bulk sends with weak failure visibility	Queue-based sends with per-phone status, retries, and diagnostics

Results

Reply count (33) and opt-out count (25) matched Twilio Insights exactly on a 2,383-contact production blast
Roughly 80% delivery rate on the real campaign with clear visibility into failures and list hygiene
Manual CSV reconciliation after every send replaced by one-click Twilio sync
Marketing team runs multiple brands from one panel with 10DLC-compliant routing per brand
Edge deployment on Cloudflare Pages + Workers for low-latency admin and scalable queue processing

Key Features

1. Multi-brand campaign admin

Create, schedule, and filter campaigns per brand. Load audiences from ActiveCampaign tags without leaving the dashboard.

2. Queue-based Twilio sending

Cloudflare Queue workers dequeue each number, send via Twilio, and record delivery state in KV for live polling.

3. Twilio sync and trusted analytics

Sync with Twilio pulls authoritative reply and opt-out totals so dashboard numbers match Twilio Insights.

4. Failure diagnostics and retry

See why individual numbers failed, retry one contact or retry all failed in a batch after a blast.

5. Inbound STOP and unsubscribe

Webhook handlers process opt-outs and replies so lists stay compliant and analytics stay accurate.

6. 10DLC-ready brand setup

Per-brand Twilio messaging configuration supports compliant US SMS routing for production marketing sends.

Screenshots

spellsology-26f.pages.dev

Multi-brand Twilio and ActiveCampaign setup

Production campaign detail: 2,383 contacts, Sync with Twilio, and failure breakdown

Twilio totals card: 33 replies and 25 opt-outs matched Twilio Insights after sync

Create campaign and ActiveCampaign audience tag selection

Engagement metrics aligned with per-recipient phone results

Technical Highlights

React 19 + TypeScript + Vite dashboard deployed on Cloudflare Pages
Worker API: auth middleware, brand CRUD, campaign lifecycle, webhook endpoints
ActiveCampaign REST integration for tag-based audience export before enqueue
KV for campaign metadata and per-recipient status; Queues for outbound worker fan-out
Twilio Programmable SMS with delivery status callbacks and inbound message routing
Mock send mode for staging plus live mode for production blasts

Privacy note: Twilio SIDs, auth tokens, and API secrets are stored in environment bindings only and are never published in this case study or client-facing docs.

Why Hire Me for SMS and Marketing Automation

SMS at scale with queues, webhooks, and per-number traceability
CRM integration (ActiveCampaign tags) wired into campaign creation
Analytics clients trust because numbers reconcile with Twilio
Edge deployment on Cloudflare without managing servers
Full-stack delivery from React UI through Worker API to third-party SMS APIs

Need SMS, Twilio, or CRM integration work?

I build production marketing tools with analytics clients trust. Available on Upwork, Fiverr, or direct.

MD Rifatul Islam

rifatul.dev@gmail.com LinkedIn

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