Twilio-Based SMS Platform (Internal System Build)MVP-Phase1
446 USDSummary
We are building a Twilio-powered internal SMS platform to replace our current texting provider within 30 days.
This system will handle:
•10,000–12,000 outbound SMS per day (initial)
Scaling to 20,000+ per day (5 days/week)
• 300–350 texts per number per day
This is NOT a basic SMS integration.
We need someone with real production experience building high-volume Twilio messaging systems.
Required Experience (Must Have)
• Strong experience with Twilio Messaging Services
•A2P 10DLC brand & campaign registration (handled personally)
•High-volume SMS sending (10k+ per day preferred)
• Carrier filtering mitigation strategies
•Webhook-based architecture
•Throttling & ramp-up logic
•STOP/HELP compliance enforcement
Secure authentication (admin + rep roles)
Clean, scalable codebase architecture
Stack: Node.js (Backend) React (Frontend) Twilio API, A2P 10 DLC, SMS Gateway, Webhooks
Project Scope – MVP Phase 1 (
Sample Platform: https://tappen.io/)
This is a lean, rules-based internal system.
• No advanced AI required.
• AI may: Suggest drafts, Select from approved templates
• AI may NOT: Auto-send freeform responses without human approval
Core Requirements
1. Messaging Infrastructure
•Proper Twilio Messaging Service configuration
•Smart number distribution
•Throttling logic
•Ramp-up strategy for new numbers
• Carrier-safe sending architecture
•Conversation continuity (even if number assignment changes)
2. State-Based Automation Engine
Lead States: New → Contacted → Replied → Interested → Docs Requested → Submitted → Funded
- System must support:
•Rule-based follow-ups
•Send follow-up after X days if no reply
• Auto-stop automation if reply detected
•Time-delay logic
•Basic tagging rules
•Keyword triggers (STOP, HELP, custom)
•Suppression lists
•Rep assignment logic
Strict rules-based sequence:
No reply → send next template → stop on reply
STOP/HELP must be fully enforced.
3. Rep Infrastructure
• Sub-accounts with permissions
•Admin + rep roles
•Daily number assignment capability
•Conversation visibility retention
Clean, fast UI (no lag during bulk sends)
4. Dashboard Requirements
•Clean, minimal, responsive
•Bulk upload leads
•Conversation view
•Lead state management
•Suppression management
•Template control
Deliverability & Compliance
Proper A2P 10DLC registration
Brand & campaign registration handled correctly
Filtering mitigation strategy
Ramp-up plan
Opt-out management
Compliance-safe architecture
Majority of leads:
Purchased leads
Previously funded clients
Deliverability is critical.
Timeline
3.5–4 weeks MAX
Rate : $10~$30/hr
If you cannot complete within this timeframe, do not apply.
How to Apply (Answer Briefly)
Have you built a Twilio system sending 10k+ SMS per day?
Only apply if you have real production Twilio SMS platform experience.
This is a long-term job (if you succeed phase 1, continue phase 2)
Apply if you have experience building SMS platforms similar to Tappon.
Thanks.
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14 days446 USD
14 days446 USD
Hello!
The EchoCode team is interested in developing an MVP for an internal SMS platform based on Twilio. We have experience in creating scalable backend systems, API integrations, and building reliable architecture for high-load services.
We will provide:
• a thoughtful and secure system architecture
• correct integration with the Twilio API
• clean and scalable code
• logging, status monitoring, and reporting
• support and development after the MVP release
…
We are ready to discuss technical details and offer the optimal solution for your tasks and deadlines.
We look forward to collaborating! 🚀
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1 day446 USD
265 1 day446 USD
Good day!
Yes, I have created production systems based on Twilio with a volume of 10k+ SMS per day and higher scalability. I have real experience in setting up Messaging Service, A2P 10DLC (manual registration of brands and campaigns), building webhook architecture, rate limiting logic, and number warming, as well as strategies to reduce carrier filtering.
I suggest we move to private messages to discuss all the details.
-
100 days446 USD
3260 9 1 1 100 days446 USD
aleksandergladchenko.github.io/portfolio/
Hello! I will immediately answer your control question from the end of the technical specification: Yes, I have real experience in creating and scaling systems based on Twilio for sending 10k+ SMS per day.
Having read your assignment, I see that you need not just a coder who will "attach the API," but a person who understands the specifics of mass mailings. Most freelancers fail precisely at the scaling stage to 20,000+ messages: they do not know how to work with Messaging Services, number pools, and the correct warming logic, which causes numbers to quickly get banned by operator filters.
I deeply understand the logic of A2P 10DLC, strict adherence to STOP/HELP rules, and load distribution (Rate Limiting).
I will build an MVP platform for you (similar to Tappen) strictly according to your stack (React + Node.js). No unnecessary AI — just a reliable State Machine (automation based on rules, triggers, and lead statuses), which instantly stops the mailing if the client responds.
Implementation timeline for MVP phase 1: 3.5 - 4 weeks.
Budget: 20,000 UAH (I am ready to fix this amount for the entire scope of work).
Write to me, and I will tell you which load distribution architecture for numbers is best to choose at the start to avoid rejections!
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10 days446 USD
2161 4 2 10 days446 USD
Hello.
We have real experience building production systems on Twilio with a load of 10k+ SMS per day. We understand the requirements of A2P 10DLC, high-volume sending, and delivery issues.
We are ready to implement the MVP in 3.5–4 weeks.
What we will cover:
• Setting up Twilio Messaging Service
… • Registering A2P 10DLC (brand + campaign)
• Throttling and ramp-up logic
• Secure architecture with webhook processing
• STOP/HELP compliance
• Suppression lists
• State-based automation (strict rules logic)
• Number distribution and limit control
• Admin / Rep roles
• Fast interface without lags
Stack: Node.js + React + PostgreSQL.
Architecture — scalable for SaaS (phase 2).
We can start immediately.
Spectrium LLP 🚀
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1 day602 USD
95478 1271 1 10 1 day602 USD
Hello. I have been working with React/Node.js for more than 8+ years.I'm ready to cooperate.
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11 days602 USD
13013 67 0 11 days602 USD
Hello! I will complete your task quickly and efficiently. Rate $20 per hour
My portfolio: https://freelancehunt.com/ua/freelancer/romas6ka.html#portfolio
Write to me, I will start working today. I will be happy to collaborate with you!
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15 days446 USD
1671 11 0 15 days446 USD
Hello I worked with Twilio API and I am developing high-load services for sending messages I will write a service in Golang using ChatGPT API Write to me, we will discuss your technical specifications
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1 day446 USD
410 7 1 1 1 day446 USD
Hello!
I am a Full-Stack Software Engineer with over 7 years of experience in developing websites, SaaS solutions, complex web platforms, and MVPs for startups - from idea and architecture to production and support.
I work not only as a developer but also with a focus on business logic, scalability, and long-term support of solutions. My portfolio includes examples of implemented projects of varying complexity.
Technology stack:
PHP (Laravel, Symfony, Yii2),
Frontend: JavaScript (Vue.js, React.js), HTML5, CSS3,
… Databases: MySQL, PostgreSQL.
Regarding timelines and costs - at this stage, it is difficult to accurately assess them without clarifying the requirements. To form a reasoned estimate, it is usually necessary to understand:
- the goals of the project;
- key functionality;
- expected load and integrations;
- priorities (quick launch vs scaling).
I suggest starting with a brief clarification of requirements or a call / correspondence - after that, I will be able to provide a realistic estimate regarding timelines, budget, and implementation options.
I would be happy to discuss the details.
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