You will get Secure Authentication System for Your Node.js App
Rising Talent
Project details
I build secure authentication systems for Node.js applications — not basic login forms, but production-ready auth with proper security layers.
My own SaaS platform Spring (getspring io) runs on the same auth architecture I deliver to clients: JWT with access and refresh tokens, role-based access control, password hashing, input validation on every route, rate limiting, and security headers. This system handles real users in production every day.
Every tier includes clean, documented code you can maintain and extend. The advanced tier adds third-party OAuth login (Google, GitHub) so your users can sign in with accounts they already have.
Stack: Node.js, TypeScript, Express, PostgreSQL, Prisma.
My own SaaS platform Spring (getspring io) runs on the same auth architecture I deliver to clients: JWT with access and refresh tokens, role-based access control, password hashing, input validation on every route, rate limiting, and security headers. This system handles real users in production every day.
Every tier includes clean, documented code you can maintain and extend. The advanced tier adds third-party OAuth login (Google, GitHub) so your users can sign in with accounts they already have.
Stack: Node.js, TypeScript, Express, PostgreSQL, Prisma.
Programming Languages
JavaScript, TypeScriptCoding Expertise
SecurityWhat's included
| Service Tiers |
Starter
$150
|
Standard
$350
|
Advanced
$500
|
|---|---|---|---|
| Delivery Time | 3 days | 5 days | 7 days |
Number of Revisions | 1 | 2 | 3 |
Number of Pages | 0 | ||
Design Customization | - | - | - |
Content Upload | - | - | - |
Responsive Design | - | - | - |
Source Code |
Optional add-ons
You can add these on the next page.
Fast Delivery
+$50 - $100Frequently asked questions
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UO
Uri O.
Apr 10, 2026
AI Developer for Financial and Customer Management Tools
Fabulous brilliant hard working and diligent fullstack engineer will work with Sos again soon.
About Sos
Node.js/TypeScript API Developer | SaaS Backends, REST APIs & OAuth
Dos Hermanas, Spain - 6:31 am local time
I'm the founder and sole developer of Spring — a SaaS platform for sales commission management. I built the entire backend from scratch: REST APIs with Express.js and TypeScript, PostgreSQL database with Prisma ORM, JWT + OAuth authentication, role-based access control, and integrations with QuickBooks, Google Sheets, Notion, and CRM systems. The platform runs in production on AWS.
What I'm best at:
→ Backend development: Node.js, Express.js, TypeScript, PostgreSQL, Prisma
→ API design and third-party integrations (CRM, payment, productivity tools)
→ Authentication systems (JWT, OAuth 2.0, RBAC)
→ Database architecture and optimization
→ Deployment on AWS (EC2, PM2, custom deploy pipelines)
I also work across the full stack when needed — my product's frontend runs on Next.js 14, React, Redux Toolkit, and Tailwind CSS.
What makes me different: I come from a professional design background (4+ years), so I don't just write code that works — I build products that make sense to users. I understand UI/UX deeply and can bridge the gap between design and development.
I hold a Bachelor's degree in Computer Science from European University in Lviv.
Languages: English (fluent), Spanish, German, Russian, Ukrainian, Armenian.
I'm responsive, detail-oriented, and I treat every project like it's my own product.
Steps for completing your project
After purchasing the project, send requirements so Sos can start the project.
Delivery time starts when Sos receives requirements from you.
Sos works on your project following the steps below.
Revisions may occur after the delivery date.
Scope & Planning
Review your codebase, confirm auth requirements, user roles, and login methods. Define the full scope before writing any code
Core Authentication
Implement signup, login, password hashing, JWT access and refresh tokens, and protected route middleware