DEV Community: pr0biex

The Landing Page Math Most Founders Skip

pr0biex — Wed, 07 Oct 2026 19:09:00 +0000

A SaaS founder I know paid $4,200 for a landing page rewrite. Six weeks later, signups had moved from 1.1% to 1.4%.

She felt good about it. She never asked the smaller question first.

Here is the arithmetic nobody runs.

Take 1,000 monthly visitors. At 1% conversion that is 10 signups. At 1.5% it is 15. Five more people. If each pays $30 a month and stays a year, that is 5 x $30 x 12 = $1,800 in added revenue. From a headline.

The part people miss: that lift is not one-time. It applies every month the page runs. Over a year, 1,000 visitors a month at the higher rate is roughly $21,600 in cumulative signup value from a one-and-a-half point change.

So the real question is not "can I afford a copywriter." It is "what is one point of conversion worth to me, and how cheaply can I move it."

Most founders never multiply this out. They either pay thousands for an agency, or they write copy in twenty minutes and ship it untested. Both are guesses wearing different price tags.

The calmer frame: your page is a machine. Headline, subhead, CTA. Each part either moves the percentage or it does not. You do not need a $4,000 budget to test a headline. You need a stack of decent starting points and an afternoon.

That is the idea behind the SaaS Founder Copy Vault (https://probiex.gumroad.com/l/ylpacf): field-tested headlines, CTAs, and email snippets you adapt yourself. Not agency work, not a course. Twelve dollars.

Run your own number first. Then decide if it is worth less than a single signup.

100 Claude Prompts for SaaS Founders

pr0biex — Tue, 06 Oct 2026 05:07:00 +0000

The 100 prompts behind every founder task in my SaaS workflow

I kept a running list of the prompts that reliably got Claude to produce usable output. After a year of iterating, it was 100. This is the full system:

Customer Research & Validation (20)
Copy & Conversion (20)
Launch & Marketing (20)
Growth & Analytics (20)
Social & Build in Public (20)

Each prompt has the exact context fields to paste in and the output format to request. No "act as a helpful assistant" filler.

https://probiex.gumroad.com/l/rztiv

I audited 40 pages of AI-generated copy. The worst ones all made the same mistake.

pr0biex — Mon, 05 Oct 2026 07:26:39 +0000

The first page fooled me. Clean design, confident headline, a market size statistic up top. I only caught it on my second pass, when I tried to quote one sentence to a colleague and realized I couldn't remember what it claimed.

That's the thing about slop that most people get wrong. It's not typos, and it's not robotic phrasing. It's unfalsifiable structure. Every sentence sounds like a claim, but no sentence can be checked. You could swap any two paragraphs and nothing would change, because nothing in them refers to anything specific.

Once you see that, you see it everywhere. Here's what my audits surfaced.

First surprise: the worst offenders were not obvious spam sites. They were polished landing pages, onboarding docs, and product descriptions with careful typography. Confidence is a costume. The typography was doing the persuading, not the sentences.

Second surprise: the same phrases recycle across completely different products. "Seamless experience." "Unlock your potential." "Built for scale." When three unrelated products describe three unrelated things with the identical phrase, that phrase is carrying zero information. It's noise wearing a suit.

Third surprise: humans write slop too. AI did not invent vague writing; it just made vagueness free. A human at least pays for slop with time. A model pays nothing, so it ships infinitely more of it. That changes the attack surface. Ten years ago you reviewed your own drafts. Now you have to review drafts that are technically yours but were effectively written by probability.

So the audit questions I landed on are simple. Can I point to the specific thing this sentence refers to? Could this sentence survive if I deleted the product name? Does it make a claim I could, in principle, verify? If the answer is no three times in a row, the page is slop, no matter how nice the font is.

I collected these into a short checklist called The AI-Slop Audit after a few people asked for my exact process. It's $12 and lives here: https://probiex.gumroad.com/l/euyxrc

If you audit one page this week using those three questions, you'll probably want to audit everything else you own.

Your Follow-Up Cadence Is Not the Problem

pr0biex — Mon, 05 Oct 2026 07:04:00 +0000

Last year I watched a freelance designer send 47 follow-up emails over 61 days. Polite ones. Scheduled ones. One opened with "just bumping this to the top of your inbox." The client finally paid, apologized, and then mentioned their invoices had never listed a due date. "Net 30" was sitting there in the fine print, apparently decorative.

That's the part nobody says out loud. Late payment barely starts with the invoice. It starts with what you wrote, or didn't, before the work began.

The advice you'll hear in every thread is some mix of: follow up faster, stay firm but friendly, charge a late fee. It all assumes the client is forgetful and you need better reminders. In my experience, most late payers aren't forgetful. They're running on the terms you gave them, and you gave them a lot of slack.

Three things that moved our numbers more than any follow-up template:

A specific date, not net 30. "Due October 14" beats "net 30" every time because it forces both sides to do the math. Vague terms invite vague payment.
A late fee agreed to up front, not sprung later. A signed clause you rarely invoke is still worth having. It moves you from chaser to contract holder the moment a conversation gets awkward.
A kill switch. A written point where you pause further work until the balance clears. Freelancers avoid this because it feels aggressive. Ten years in, I've seen it do the opposite: clients respect the boundary, and you stop funding their cash-flow problem with your labor.

Notice none of these involve sending more emails. Follow-ups aren't the lever. Terms are. Every friendly bump you send without tightening the underlying terms just trains the client that your deadlines are suggestions with feelings attached.

If you want the exact clauses, invoice copy, and pause-work scripts we use for this, The Late-Payment Playbook ($12) lays them out: https://probiex.gumroad.com/l/vqblnp

Building a 90-Day LinkedIn Content Habit (Without Burning Out)

pr0biex — Mon, 05 Oct 2026 05:09:02 +0000

You log onto LinkedIn, see a few polished posts from other developers, and wonder how they’re always sharing practical ideas. The difference isn’t their job title or networks — it’s structure.

Let’s break it down. Unstructured posting often fizzles out because “share more” is too vague. A repeatable approach rooted in small steps helps you avoid blank-page syndrome and actually build an audience over time.

Step 1: Create a 3-Topic List

Why: When you niche down, you start to attract relevant conversations. For example, topics like “TypeScript tips,” “career pivots,” and “code review strategies” are specific but wide enough for 90 days of insights.

Step 2: Batch-Capture Experiences

Every time you debug an issue or help a teammate, jot down the scenario and lesson in a note app. These micro-stories will feed your posts, making them more real than generic tips.

Step 3: Schedule 2 Blocks a Week

Choose two 30-minute windows where all you do is shape a post. In the first, outline bullet points from your micro-stories. In the second, clean up and post.

Step 4: Start Replies, Not Monologues

Why: Posts that invite comments — like “What tool do you wish more people knew about?” — are easier entry points than fully polished essays. You’ll spot what resonates and gradually find your voice.

Want a ready-to-follow 90-day guide with prompts and a tracking sheet? 90-Day LinkedIn Content Playbook ($12) lays out daily steps you can reuse and tweak for your style. Stick to these basics, and LinkedIn posting becomes less about chasing trends and more about sharing your actual experience.

10 Free Claude Prompts for SaaS Founders

pr0biex — Mon, 05 Oct 2026 05:07:00 +0000

I packaged my 10 most-used Claude prompts as a free PDF

Every week I use the same 10 prompts to research customers, write launch copy, and audit growth. I cleaned them up (fill-in fields, output format instructions) and put them in a free PDF.

What’s inside

3 customer-research prompts that actually return real verbatim quotes
3 launch copy prompts (landing page, launch email, changelog)
2 analytics prompts for funnel leak checks
2 build-in-public prompts that don’t sound like a bot

Grab it here (free, $0): https://probiex.gumroad.com/l/efziwa

If you want the full 100-prompt pack, it’s linked on the same page.

I Checked 40 Sites for AI Search Visibility. They All Made the Same Mistake.

pr0biex — Sun, 04 Oct 2026 20:40:44 +0000

Last month I looked at how 40 small SaaS sites showed up when someone asked ChatGPT or Perplexity a question their product answers directly. 34 of them ranked fine on Google. Barely any of them got cited by an AI assistant.

Here is the uncomfortable part: so what if you rank on Google?

When a person asks an AI model "what is the best tool for X," the model does not read your page top to bottom. It pulls short passages that look definitive, well sourced, and internally consistent with what it already knows about your brand. If your content is written for a human skimming an article, the model usually skips it.

What most people do

Publish long blog posts optimized for one keyword.
Stuff product features into a homepage pitch.
Hope that backlinks will carry them into AI answers.

What actually works

Answer one specific question per section, in plain language, in the first two sentences.
Use clear headings that mirror real questions people ask.
Keep your pricing, claims, and definitions identical across your site and your public profiles. Models cross-check for consistency, and contradictions quietly disqualify you.
Add structured data (FAQ, product schema) so machines parse you without guessing.

The numbers from that same audit back this up. Pages with a direct answer in the opening lines of a section were cited roughly 3x more often than pages with narrative introductions. Sites with matching details across their homepage, LinkedIn, and GitHub appeared in AI answers 2.4x more often than sites with drifting claims.

None of this is about tricking the model. It is about removing ambiguity. The model is not unsmart; it is unsure. Every vague sentence gives it a reason to quote someone else instead.

Think of it like documentation. Sloppy docs get read by nobody. Precise docs get quoted constantly.

The good news: this is fixable in an afternoon. Go through your three most important pages, find every spot where a paragraph takes two sentences to say what could be said in one, and tighten it. Then check whether your product description on your site matches what your social profiles say.

If you want the full checklist and the exact operating habit I used to audit those 40 sites, that is essentially what the GEO Operations System packages up. It is $15, and it lives at https://probiex.gumroad.com/l/llftbq

Run the audience through Google first. Then give the AI a reason to cite you too.

Two Webhooks, One Rank: Race-Safe Payments with Postgres Advisory Locks

pr0biex — Thu, 17 Sep 2026 06:31:07 +0000

Two Webhooks, One Rank: Race-Safe Payments with Postgres Advisory Locks

Payment webhooks get retried. Users double-click. Two rivals outbid each other in the same second. If your "apply payment" path isn't concurrency-safe, you get double-applied bids, phantom ranks, and money that doesn't match the leaderboard.

I run Steal the Spot — a pay-to-rank leaderboard where every bid is money and every rank is public. Here's the exact pattern that keeps our board correct, using Supabase Postgres + Dodo webhooks. Three ingredients, all in one function.

1. Serialize with a transaction-scoped advisory lock

Two bids landing "at the same time" must see each other, or both compute rank against a stale snapshot:

perform pg_advisory_xact_lock(hashtext('steal-bid:' || p_season_id));

Why pg_advisory_xact_lock and not pg_advisory_lock: the _xact_ variant auto-releases on commit/rollback. A crashed worker can't leave the board locked forever. One lock per season keeps unrelated seasons parallel.

2. Make the webhook idempotent on payment_id

Payment providers retry webhooks. Ours checks before doing anything:

if exists (select 1 from public.bids where payment_id = p_payment_id) then
  return jsonb_build_object('already_applied', true, ...);
end if;

Retry #2 returns success without touching money. The provider stops retrying, the board never double-counts. This check lives inside the locked transaction, so two concurrent deliveries of the same webhook can't both slip through.

3. Lock the row, compute rank, fail closed

select * into v_listing
from public.listings
where id = p_listing_id and season_id = p_season_id
for update;

if not found then
  raise exception 'listing not found';
end if;

FOR UPDATE means concurrent bids on the same listing queue instead of interleaving. Rank math is deterministic: strictly better bids plus older ties ahead, excluding self:

select count(*) + 1 into v_rank_to
from public.listings o
where o.season_id = p_season_id
  and o.status = 'active'
  and o.id <> p_listing_id
  and (o.bid_amount_cents > v_new_total
       or (o.bid_amount_cents = v_new_total
           and o.created_at < v_listing.created_at));

Ties break to whoever got there first — no randomness, no arguments.

4. Keep the function away from clients

revoke all on function public.steal_apply_bid(...) from public, anon, authenticated;
grant execute on function public.steal_apply_bid(...) to service_role;

Only the server (webhook handler with the service-role key) can call it. Rank previews in the UI are estimates; the webhook is the truth. Never let a client write its own rank.

The failure modes this kills

Scenario	Without the pattern	With it
Provider retries webhook	Bid applied twice	`already_applied`, no-op
Two bids, same second	Both rank off stale snapshot	Serialized, both correct
Worker crashes mid-apply	Lock held forever (session lock)	`_xact_` lock dies with the transaction
User crafts rank via API	Fake #1	Function is service-role only

Try the board this protects

stealthespot.lol — list free, pay from $2 to climb, every bid public. Outbid someone and watch the rank move on the next webhook.

Built by @probiex007 — Next.js 16 + Supabase + Dodo, deployed on Vercel.

I Built a Pay-to-Rank Leaderboard Where Products Compete Through Transparent Bidding

pr0biex — Wed, 16 Sep 2026 10:05:43 +0000

I Built a Pay-to-Rank Leaderboard Where Products Compete Through Transparent Bidding

Product Hunt resets every 24 hours. SEO takes months. Traditional ads are opaque.

I built something different: a leaderboard where your rank is permanent, every bid is public, and you only pay the gap to climb.

Here's the tech behind Steal the Spot.

The Problem

Product Hunt votes reset daily — your #1 spot is gone tomorrow
SEO takes months — by the time you rank, competitors have caught up
Traditional ads are opaque — you never know if you're getting fair value
Leaderboards are either pay-to-play or popularity contests

What if there was a leaderboard where:

Your rank is permanent (until someone outbids you)
Every bid is public and transparent
You only pay the difference when raising your bid
You get email alerts when outbid with exact price to steal back

How It Works

1. List FREE ($0)

Paste your product URL, pick a category, get on the board instantly. No credit card required.

2. Pay the Gap to Climb

Rank = cumulative bid. Every dollar moves you up. When raising your bid, you only pay the difference (minimum raise: $2).

3. Hold #1 or Outbid

Take any rank including #1. When rivals outbid you, get an instant email alert with the exact price to steal your spot back.

The Architecture

┌─────────────┐     ┌──────────────┐     ┌─────────────┐
│   Next.js   │────▶│   Supabase   │────▶│    Dodo     │
│   16 App    │     │  Postgres +  │     │  Payments   │
│   Router    │     │    RLS       │     │  (INR/UPI)  │
└─────────────┘     └──────────────┘     └─────────────┘
       │                                        │
       ▼                                        ▼
  ┌─────────┐                            ┌─────────────┐
  │  React  │                            │  Webhooks   │
  │  Three  │                            │  (Refunds)  │
  │  Fiber  │                            └─────────────┘
  └─────────┘

The Bidding System

No deposits, no refunds — bids are final and public. The rules are simple and server-authoritative:

Your bid IS your rank — highest cumulative bid sits at #1, ties break to whoever got there first
Pay the gap to raise — already bid $5 and want $20? You pay $15, not $20 (minimum raise: $2)
Taking #1 costs leader bid + $2 — the reclaim price is always public, and outbid losers get it by email with a one-click fight-back link

The Math

export function calcMinOutbid(currentBid: number, minRaise: number = 2): number {
  return currentBid + minRaise;
}

export function calcRaiseCost(currentBid: number, targetBid: number): number {
  return targetBid - currentBid; // pay the gap, not the full amount
}

Why server-authoritative matters

Rank previews never override the webhook. Concurrent bids are resolved with transactional locking (steal_apply_bid with advisory locks) and idempotent Dodo webhooks — two agents outbidding each other at the same second can't corrupt the board. Race-tested, not hoped.




## Spot City: The Visual Layer

Built an interactive 100-lot city grid called Spot City ([stealthespot.lol/spotcity](https://www.stealthespot.lol/spotcity)):

- Taller towers = more bids
- LOT 001 holds rank #1 (center plaza)
- Tap any building to inspect its product profile
- Tap any dashed lot to claim it immediately

## Tech Stack

| Layer | Technology |
|-------|------------|
| Frontend | Next.js 16 App Router, React Three Fiber |
| Database | Supabase (Postgres + Realtime + RLS) |
| Payments | Dodo Payments (INR/UPI native) |
| Hosting | Vercel |

### Key Features

- **Real-time leaderboard** — Supabase Realtime for live updates
- **Automatic refunds** — Dodo webhooks handle losers' deposits
- **RLS policies** — Row-level security for bid integrity
- **3D visualization** — React Three Fiber for product previews
- **INR/UPI** — Native Indian payment support

## Featured Slots

For brands that want guaranteed visibility:

- **30-day lease** at $50/mo
- **Placement above the leaderboard**
- **Premium visibility**
- **8 slots available**

Not pay-to-rank. Pay-for-placement.

## Current Stats (refresh from [/stats](https://www.stealthespot.lol/stats) before publishing)

- 15+ categories (AI, SaaS, Dev Tools, Marketing...)
- Free entry ($0) + pay-from-$2 climbs
- Live SVG rank badges, free JSON API (`GET /api/board`), 11 free SEO tools

## What's Next

- Seasons (board resets so there's always something to win)
- More category boards from demand
- Outbid-email analytics for sellers

## Try It

1. Go to [stealthespot.lol](https://stealthespot.lol)
2. Click "List Free"
3. Paste your product URL
4. You're on the board

If you want to rank up, place a bid. If you get outbid, you'll get an email.

---

*Built by [@probiex007](https://x.com/probiex007)*

#BuildInPublic #SaaS #Leaderboard #NextJS #Supabase

Have you discovered local.ai yet? 👀

pr0biex — Sun, 16 Aug 2026 07:05:09 +0000

It’s a platform focused on independent local-AI benchmarks, models, hardware, energy data and the AI community.

There’s also a referral competition with DGX Spark + Mac Mini prizes. 🚀

Enter through my referral link:
https://local.ai/probiex007/invite

AI #LocalAI

Have you discovered local.ai yet? 👀 It’s a platform focused on independent local-AI benchmarks, models, hardware, energy data and the AI community. Enter through my referral link: https://local.ai/probiex007/invite

pr0biex — Sun, 16 Aug 2026 07:03:48 +0000

I just claimed local.ai/probiex007. Claim your name.

local.ai

🚀 Introducing RESTerX: An Open-Source, Lightweight, and Powerful API Testing Tool for Developers

pr0biex — Fri, 29 Aug 2025 19:36:19 +0000

Whether you’re building RESTful APIs or testing integrations with third-party services, API testing is a daily task for developers. Tools like Postman, Insomnia, and Thunder Client have their place, but they can feel heavy, bloated, or just too much for what should be a simple HTTP request.

Why RESTerX?

While popular tools are powerful, many are closed-source, come with telemetry, or eventually push users towards paid tiers. RESTerX is:

🔓 Completely Open Source
🧼 Lightweight and clean UI
💻 Cross-platform CLI & Web UI
🔒 Privacy-first (no data sent externally)
It’s everything you need to test APIs without the bloat.

A Postman-like Web UI — Without the Bloat

The web interface is fast, responsive, and mirrors the familiar layout of Postman — with some major perks:

🌓 Dark/Light Mode Toggle
🧠 Request History saved in localStorage
🧾 Custom Headers, Auth, and Body Tabs
📦 JSON/Raw/Form support with syntax highlighting
🔍 Real-time status, response time, and headers display
And yes, it looks awesome on both desktop and mobile.

To get started:

./restcli web

Open your browser at http://localhost:8080 (or your custom port).

Press enter or click to view image in full size

CLI Interface — For Terminal Lovers

Sometimes, you just want to stay in the terminal. RESTerX brings a menu-driven CLI that supports all HTTP methods and runs seamlessly on Windows, macOS, and Linux.

Launch it with:

./restcli
Choose your method, input your URL, and you’re ready to go. Fast, minimal, and distraction-free.

Built with Go for Performance

Go (Golang) is known for its speed, portability, and concurrency. RESTerX leverages these strengths to give you a tool that:

Starts instantly
Has a tiny memory footprint
Compiles to a single binary
No Electron. No memory hogs. Just solid performance.

🔧 Installation is Simple
If you have Go installed, just clone the repo and build:

git clone https://github.com/AkshatNaruka/RESTerX
cd RESTerX
go build -o restcli ./cmd

That’s it. No dependencies, no Docker, no drama.

Testing APIs Made Easy

RESTerX supports:

✅ All standard HTTP methods: GET, POST, PUT, PATCH, HEAD, DELETE
🔐 Bearer and Basic authentication
🧾 Custom headers
📝 Request body in JSON, form data, or raw text
📊 Formatted responses with copy-to-clipboard support
Want to test a local microservice or a public API? RESTerX handles both seamlessly.

Privacy by Design

No login. No telemetry. No cloud sync.

All your data stays in your browser (via localStorage) or on your machine.

In a time where even developer tools track usage and send data, RESTerX is a breath of fresh air.

🔥 Why Developers Love RESTerX
🧠 Zero learning curve — Designed to feel instantly familiar
💥 Fast and responsive — Built with performance-first mindset
🛠️ Hackable and extensible — Open-source with clear structure
🌍 Works offline — No network needed for local API testing
Whether you’re working on backend services, testing microservices, or just poking at REST APIs, RESTerX deserves a place in your toolkit.

Join the Community

RESTerX is open-source and lives on GitHub:
🔗 github.com/AkshatNaruka/RESTerX

We welcome contributors! Whether you want to add a feature, squash a bug, or improve documentation — your input is valuable.

Submit a pull request and be part of the RESTerX journey!

Final Thoughts

RESTerX brings the joy back to API testing. With a clean interface, powerful CLI, and zero clutter, it’s a must-have tool for developers who value performance, simplicity, and privacy.

Try it out. Star it. Contribute. And spread the word.

👉 GitHub — 🔗 github.com/AkshatNaruka/RESTerX

Feedback?

If you’ve used RESTerX or want to suggest a feature, open an issue on GitHub. Let’s make API testing better, together.