u/ST_01

Got some advice recently that NestJS "isn't industry standard" and "barely anyone uses it" anymore, especially compared to other backend frameworks. This didn't match what I'd researched myself, so wanted a reality check from people actually building with it.

For context — I'm evaluating a SaaS platform built on NestJS 11 + TypeScript + TypeORM + PostgreSQL, and trying to figure out if that was a reasonable tech choice or something I should be worried about going forward.

Is NestJS genuinely fading in adoption, or is this just someone's personal bias/lack of exposure to it? Curious what people actually building production backends are seeing in the field right now.

I'm looking for some tips and recommendations for a local AI voice build to enhance my voice AI offering. Including a PBX layer, possibly local LLM processing, TTS, STT.

I'm looking at building a self-hosted AI receptionist/voice agent using a local SIM card and GSM gateway instead of Twilio. Here's the stack I'm currently considering

Self-Hosted AI Voice Agent Stack (No Twilio, Local SIM Number)

Hardware:

Mini PC: Beelink SER7 (Ryzen 7 7840HS, 32GB RAM, 1TB NVMe SSD)

Alternative budget option: Beelink SER5 Pro (Ryzen 7 5800H, 32GB RAM)

Alternative value option: GMKtec K8 (Ryzen 7 8845HS)

Power Protection

UPS: CyberPower CP900AVR (900VA / 560W)

Alternative: APC Back-UPS 850VA

UPS powers:

Mini PC

GSM Gateway

Router/Switch

Telephony:

Local SIM card from carrier

GSM-to-SIP Gateway:

GoIP 1

Dinstar DWG2000 series

OpenVox GSM Gateway

PBX:

Ubuntu Server

Docker

Asterisk (or FreePBX)

AI Stack:

Ollama

Qwen 2.5/3 7B (primary conversational model)

DeepSeek 7B (optional for reasoning/tool use)

Whisper.cpp (local speech-to-text)

Voice:

ElevenLabs API for TTS (premium voice quality)

Local TTS fallback: Piper

Orchestration

Python

FastAPI

Redis (conversation state/session management)

ChromaDB (long-term memory/vector storage)

Call Flow

Caller → Local SIM → GSM Gateway → Asterisk → Python Agent → Whisper → Qwen/DeepSeek → ElevenLabs → Asterisk → Caller

Goals

No Twilio

No SIP trunk provider

Local Caribbean phone number

Self-hosted AI logic

Premium voice quality

Low monthly operating costs

Future Enhancements:

CRM integration

WhatsApp integration

Appointment booking

RAG knowledge base

Multi-language support

Voice cloning

Outbound AI calling

Would love feedback from anyone running a similar Asterisk + GSM Gateway + Local LLM setup in production. Are there any major pitfalls or latency issues I should anticipate?

I'm looking for some perspective from SaaS founders and technical founders on what is considered normal regarding maintenance of a custom-built SaaS platform before it has any paying customers.

Context:

I hired a small development team to build a SaaS product for a fixed project cost.

The product is not yet fully launched and has no paying customers yet.

The developers are telling me that software development is an ongoing process and that the platform will need continuous maintenance and developer involvement even before customers start using it.

I understand that bug fixes, feature requests, security updates, and scaling require ongoing work after launch. That part makes sense.

What I'm trying to understand is this:

Once a SaaS platform reaches the agreed scope and is handed over with the source code, documentation, deployment instructions, API documentation, and infrastructure access, is it normal to require developers on an ongoing basis even when:

No new features are being added

No customers have onboarded yet

No significant changes are being made

The platform is simply sitting in a ready-to-launch state

In your experience, should a completed SaaS platform be able to run with minimal intervention until customers begin using it, or is ongoing paid developer maintenance generally expected from day one?

I'd especially appreciate hearing from founders who have commissioned custom software builds and from agencies/developers who hand over projects to clients.

What has been your experience, and what would you consider a reasonable handover standard?