You will get Build Your MVP SaaS in Next.js Auth, Stripe, AI features , n8n
Project details
Launch your SaaS MVP fast built with Next.js + TypeScript, Stripe subscriptions, and optional AI (OpenAI/RAG). I design, implement, and deploy a production-ready app with: secure auth/roles, subscription billing + trials, dashboards & CRUD, file uploads, webhooks, admin tools, audit logs, analytics, and error monitoring.
Process: 1) 48-hour discovery + clickable prototype, 2) weekly shippable releases, 3) deploy to Vercel/Firebase on your domain, 4) thorough handoff with docs and Loom videos.
Ownership: code in your GitHub, CI/CD, env management, full IP control. I optimize Core Web Vitals, accessibility, and security (OWASP), with observability, feature flags, and rate limits to de-risk launch.
Extensions: Contentful/Headless marketing pages, email/SMS (SendGrid/Twilio), social/OAuth login, customer portal, usage-based billing.
Deliverables: scope brief, wireframes, tested code, seed data, and a 14-day stabilization window + optional monthly support.
Goal: a usable MVP in weeks not months so you can test with real users and iterate confidently.
Process: 1) 48-hour discovery + clickable prototype, 2) weekly shippable releases, 3) deploy to Vercel/Firebase on your domain, 4) thorough handoff with docs and Loom videos.
Ownership: code in your GitHub, CI/CD, env management, full IP control. I optimize Core Web Vitals, accessibility, and security (OWASP), with observability, feature flags, and rate limits to de-risk launch.
Extensions: Contentful/Headless marketing pages, email/SMS (SendGrid/Twilio), social/OAuth login, customer portal, usage-based billing.
Deliverables: scope brief, wireframes, tested code, seed data, and a 14-day stabilization window + optional monthly support.
Goal: a usable MVP in weeks not months so you can test with real users and iterate confidently.
Programming Languages
JavaScript, TypeScriptCoding Expertise
Performance OptimizationWhat's included
| Service Tiers |
Starter
$750
|
Standard
$1,499
|
Advanced
$2,499
|
|---|---|---|---|
| Delivery Time | 15 days | 25 days | 40 days |
Number of Revisions | 2 | 3 | 5 |
Number of Pages | 3 | 5 | 7 |
Design Customization | - | ||
Content Upload | - | ||
Responsive Design | |||
Source Code |
Optional add-ons
You can add these on the next page.
Fast Delivery
+$300
Additional Revision
+$75
Additional Page
(+ 1 Day)
+$150
Design Customization
(+ 1 Day)
+$120
Content Upload
(+ 1 Day)
+$100
RAG data ingestion (vector DB)
(+ 3 Days)
+$450
Admin dashboard
(+ 2 Days)
+$300
Email (Resend/Postmark) + templates
+$200
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SG
Sergi G.
Nov 28, 2025
Frontend Developer for CRM Project Completion
I’m very happy about having chosen Yassine for this job. He was the perfect candidate due to his technical and soft skills. I was looking for someone to develop some specific features in a very complex ReactJS app. He has a deep knowledge of ViteJS, Typescript and Redux. I appreciate as well his good practices while developing code: he creates every feature separately in a new branch and once he is finished, he creates a detailed PR including all the changes. I wouldn't hesitate to hire him again.
About Yassine
Front-end / Back-end / AI Software Developer (SaaS Next.js Supabase)
Warsaw, Poland - 1:02 am local time
I design, build, and scale SaaS products end-to-end with Next.js (App Router), TypeScript, and Supabase (Postgres + Storage). I’m the founder/lead developer of DAD OF SEO (dadofseo.com), a live SaaS with subscription billing, credit-based usage, admin dashboards, and external API integrations.
What I Do
SaaS MVPs → Production: architecture, schema design, auth, RBAC, dashboards, observability
API Routes & Webhooks: clean REST endpoints, background jobs, idempotency, retries
Stripe Billing: Checkout/Customer Portal, subscriptions, one-time credits, coupons, invoicing, webhook handlers
External Integrations: OpenAI/AI providers, CRM (HubSpot/Pipedrive), Slack/Zapier, email, storage/CDN
Data & Storage: Supabase/Postgres modeling, RLS, migrations, seed scripts, file uploads (images/audio)
Frontend: React + Tailwind UI, component systems, state management, form flows, accessibility
Quality & Ops: CI/CD (Vercel), env/config, Sentry/Logtail, analytics, performance, documentation
Tech Stack
Next.js (App Router) · React · TypeScript · Supabase (Postgres, Storage, RLS) · Stripe · Prisma · Node.js · Tailwind CSS · Vercel · Sentry · REST APIs/Webhooks · OpenAI & AI tooling
Example Outcomes I Deliver
Credit-based usage systems (monthly reset + pay-as-you-go)
Robust webhook pipelines with retry/idempotency & audit trails
Secure multi-tenant architectures with role-based access
File ingestion (images/audio) + processing + signed URL delivery
Admin analytics, reporting, and feature flags
How I Work
Clear scope → rapid milestones → transparent communication
Production-ready code with tests, logging, and docs
I think like an owner: usability, performance, and maintainability come first
Steps for completing your project
After purchasing the project, send requirements so Yassine can start the project.
Delivery time starts when Yassine receives requirements from you.
Yassine works on your project following the steps below.
Revisions may occur after the delivery date.
Discovery & Scope Lock (0–2 days)
Deliverables: 1-page MVP spec (user stories, success metrics, tech stack, milestone plan). You get: Clear scope, timeline, and acceptance criteria.
Step 2 — Clickable Prototype (3–5 days)
Deliverables: Figma or lightweight Next.js prototype of core flows. You get: Early validation + chance to adjust before build.