Peter S.
Full Stack Saas Developer | Next.js | Stripe Connect | Ai & Automation
I build and ship complete SaaS products and AI automation systems (the kind that run in production every day, not just in a demo). Most recently I built Joinly from zero: a creator-monetization platform handling paid access across Telegram, Discord, WhatsApp and Slack, with Stripe Connect payments, subscription billing, automatic member add/removal, and a full creator dashboard. It’s live and taking real payments. In the client’s words: “Peter built Joinly from zero and exceeded my expectations.” I’m also the founder of Hefajst Dynamics, a Slovenian AI automation studio, and the creator of uChatz — an AI chat assistant for WhatsApp, Telegram and websites, built for hospitality businesses across Central & Eastern Europe. So the problems you’re dealing with, messy APIs, webhook headaches, payment logic, database sync, AI integration, I’m not just familiar with them. I’m solving them daily in production. What I build: • SaaS platforms — full-stack products in Next.js with payments, subscriptions, auth and dashboards • Payment systems — Stripe and Stripe Connect, subscription billing, marketplace payouts, commission splitting • WhatsApp & Telegram automation — AI bots that handle customer conversations 24/7, from booking inquiries to FAQ responses • AI agents — workflows that understand context and respond intelligently using Claude or OpenAI • Database automation — Supabase/PostgreSQL data that stays clean, synced and reliable without manual intervention • Lead generation systems — scraping, enrichment and outreach running on autopilot • API integrations — making tools talk to each other, even when they weren’t designed to How I work: I don’t ghost clients. I don’t pretend to have answers I don’t have. When a project throws a curveball (and they always do) I dig in, figure it out, and keep you informed. Straightforward communication, always. I pick things up fast, keep solutions simple, and build things that hold up in production, not just in demos. My toolkit: Next.js · TypeScript · JavaScript · Node.js · Stripe & Stripe Connect · Supabase · PostgreSQL · Prisma · n8n · REST APIs · Webhooks · WAHA · Telegram & Discord APIs · Claude AI · OpenAI · Docker · Azure · Railway · Cloudflare
Earnings and projects
Last 6 months ÷ 6
Last 6 months: $26k
Billed in all: $28,871$29k
$8.6k in the last 6 months
Across 4 contracts
Earnings, last 30 days
Skill rankings: Top 0.42% in WhatsApp
Ranked by MRR among everyone on Upwork with the skill.
- WhatsApp472 freelancers · 🇸🇮 #1Top 0.42%🇸🇮#1 of 1
- #137Stripe3,151 freelancers · 🇸🇮 #1Top 4%🇸🇮#1 of 1
- #195Supabase4,116 freelancers · 🇸🇮 #1Top 5%🇸🇮#1 of 4
- #249SaaS Development5,201 freelancers · 🇸🇮 #1Top 5%🇸🇮#1 of 2
- #254AI Chatbot6,841 freelancers · 🇸🇮 #1Top 4%🇸🇮#1 of 4
- #259n8n7,797 freelancers · 🇸🇮 #1Top 3%🇸🇮#1 of 5
- #283AI App Development4,708 freelancers · 🇸🇮 #2Top 6%🇸🇮#2 of 3
- #407Automation12,739 freelancers · 🇸🇮 #1Top 3%🇸🇮#1 of 6