I will build PDF generation into your web app invoices contracts

S
samuu_dev
S
samuu_dev
Samuel
build PDF generation into your web app invoices contracts
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build PDF generation into your web app invoices contracts
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build PDF generation into your web app invoices contractsbuild PDF generation into your web app invoices contractsbuild PDF generation into your web app invoices contracts

About this gig

Need your app to generate proper documents?

I build PDF generation into web applications invoices, contracts, reports, certificates generated from your data, matching your design.

What I've done: I built Firmado (firmadoya.es), a production SaaS that generates legal contracts as PDFs: dynamic pagination, conditional clauses that appear based on the data, and automatic delivery by email.

What you get:

PDF generation from your structured data (JSON, database, form submissions)

Your layout, logo and branding, faithfully reproduced

Clean pagination long tables and variable-length content handled properly

Delivery by download or automatic email attachment

Clean, commented code you can modify yourself

The part most people get wrong: documents break when real data arrives a table spills past the page, an optional section leaves a gap. I build for that from the start.

Before ordering, message me with your stack and a sample of the document you need. I'll tell you honestly which package fits.

Fluent in English and Spanish.

  • Expertise

    • Debugging
    • Performance
    • Databases
    • Testing procedures

  • Programming language

    • TypeScript

  • Frontend framework

    • Next.js
    • React.js

  • Backend framework

    • Node.js

Get to know Samuel

Samuel

FullStack Developer

  • FromSpain
  • Member sinceJul 2026

  • Languages

    Spanish, English
Full-stack developer building web apps and SaaS with Next.js, React, and Node.js. I designed and shipped Firmado (firmadoya.es), a production SaaS with Stripe payments, automated PDF generation, and transactional email — built end to end. I've also built a multi-tenant CRM with 30+ REST endpoints and VoIP/WhatsApp integrations. What I do: • Full-stack development (Next.js, React, TypeScript, Node.js) • Stripe integration and secure checkout flows • REST APIs, SQL databases, third-party integrations Fluent in English and Spanish — let's talk about what you're building!

My Portfolio

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