Custom SaaS Platform Development by Sergio PereyraCustom SaaS Platform Development by Sergio Pereyra
Custom SaaS Platform DevelopmentSergio Pereyra
Cover image for Custom SaaS Platform Development
I build production-grade SaaS platforms that handle real users, real payments, and real scale from day one.
Who this is for: Founders and companies past the MVP stage who need a full platform built right: multi-tenant architecture, complex billing, role-based access, integrations, and the infrastructure to grow without rewriting everything in 6 months.
What you get: A complete, deployed SaaS platform with production architecture, not a prototype. Auth, billing, dashboards, API layer, monitoring, CI/CD, and whatever core features your product needs to compete.
My stack: React, Next.js, Node.js, Python, PostgreSQL, MongoDB, Stripe/Plaid, AWS, Vercel, OpenAI, custom integrations.
How it works:
Weeks 1-2: Discovery, architecture design, data modeling, and design system
Weeks 3-6: Core platform build, integrations, and billing logic
Weeks 7-9: Advanced features, performance optimization, and testing against real usage patterns
Weeks 10-12: Launch prep, deployment, monitoring setup, and handoff with documentation
Track record:
Glewee: Influencer marketing SaaS connecting 5,000+ brands with 15,000+ creators. Campaign builder, creator marketplace, Shopify integration, and analytics built with React, Node.js, and PostgreSQL.
InterviewIz: AI-powered interview platform handling 10,000+ sessions/month with real-time voice interviews, live coding sandbox, and structured scorecards.
NextBlock: Tiered API platform for Solana developers. Self-serve billing across 4 tiers, rate limiting, usage tracking. $250K processed revenue in 60 days.
I've shipped platforms that make money and hold up under load. If you need something built to last, let's talk.
FAQs

Starting at$15,000
Duration12 weeks
Tags
Next.js
Node.js
Python
React
SaaS Development
Stripe
Fullstack Engineer
Web Developer
Service provided by
Sergio Pereyra Frankfurt, Germany
$1k+
Earned
3
Paid projects
5.00
Rating
45
Followers
Custom SaaS Platform DevelopmentSergio Pereyra
Starting at$15,000
Duration12 weeks
Tags
Next.js
Node.js
Python
React
SaaS Development
Stripe
Fullstack Engineer
Web Developer
Cover image for Custom SaaS Platform Development
I build production-grade SaaS platforms that handle real users, real payments, and real scale from day one.
Who this is for: Founders and companies past the MVP stage who need a full platform built right: multi-tenant architecture, complex billing, role-based access, integrations, and the infrastructure to grow without rewriting everything in 6 months.
What you get: A complete, deployed SaaS platform with production architecture, not a prototype. Auth, billing, dashboards, API layer, monitoring, CI/CD, and whatever core features your product needs to compete.
My stack: React, Next.js, Node.js, Python, PostgreSQL, MongoDB, Stripe/Plaid, AWS, Vercel, OpenAI, custom integrations.
How it works:
Weeks 1-2: Discovery, architecture design, data modeling, and design system
Weeks 3-6: Core platform build, integrations, and billing logic
Weeks 7-9: Advanced features, performance optimization, and testing against real usage patterns
Weeks 10-12: Launch prep, deployment, monitoring setup, and handoff with documentation
Track record:
Glewee: Influencer marketing SaaS connecting 5,000+ brands with 15,000+ creators. Campaign builder, creator marketplace, Shopify integration, and analytics built with React, Node.js, and PostgreSQL.
InterviewIz: AI-powered interview platform handling 10,000+ sessions/month with real-time voice interviews, live coding sandbox, and structured scorecards.
NextBlock: Tiered API platform for Solana developers. Self-serve billing across 4 tiers, rate limiting, usage tracking. $250K processed revenue in 60 days.
I've shipped platforms that make money and hold up under load. If you need something built to last, let's talk.
FAQs

$15,000