sam99s

Córdoba, Argentina · Remote

Samuel Schulz

Backend Engineer Payments & Fintech

Backend engineer with 5 years of production experience, the last 3 focused on payments and financial infrastructure. Currently building cross-border interoperable QR payment rails used by Brubank and Binance; previously delivered banking systems for Rabobank. My core strength is C# and .NET, with solid Vue.js on the front end, hands-on production observability and CI/CD ownership.

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  • 5+years in production
  • 3years in payments & banking

Experience

  1. Depay Backend Engineer

    Current Jan 2026 – Present · Remote

    Cross-border payment interoperability. Clients: Brubank, Binance.

    • Build and operate interoperable QR payment rails connecting a growing network of countries, for clients including Brubank and Binance.
    • Design and ship NestJS microservices for high-volume payment traffic, instrumented end to end with Datadog.
    • Own production reliability for payment flows, reducing incidents by 90% by mapping errors and standardizing the responses returned to client integrations.
    • NestJS
    • TypeScript
    • Microservices
    • Datadog
    • QR payments

  2. Tech-House Software Consultant / Full Stack Engineer

    Apr 2025 – Jan 2026 · Remote

    Client: LAIVE — food ecosystem platform.

    • Maintained and evolved 5 microservices and web applications used across the client's operations, built with .NET, Vue.js, React.js, TypeScript and Orchard Core.
    • Acted as technical counterpart to the client's corporate team, planning technical deliveries and improvements across their sites.
    • .NET
    • Orchard Core
    • Vue.js
    • React.js
    • TypeScript

  3. Lubee Full Stack Engineer

    Feb 2023 – Apr 2025 · Remote

    Client: Rabobank — banking platform.

    • Developed and maintained banking features on .NET 7, MySQL and Vue.js 3 for Rabobank over a 2-year engagement, building the platform ahead of its production launch.
    • Owned CI/CD pipelines in Azure DevOps, automating builds and deployments across environments.
    • Worked across additional stacks as project needs required: Node.js, NestJS, Vue.js 2, Angular, WPF.
    • .NET 7
    • MySQL
    • Vue.js 3
    • Azure DevOps
    • Angular

  4. Shifta Software Engineer

    Oct 2022 – Dec 2022 · Fixed-term project

    • Built a Tiendanube–HubSpot API integration on .NET 6, replacing a third-party sync service that was being discontinued.
    • .NET 6
    • REST APIs
    • HubSpot
    • Tiendanube

  5. Macena Full Stack Developer

    Nov 2021 – Aug 2022

    • Developed healthcare-sector web products on Vue.js, .NET Core 3 and SQL Server.
    • Vue.js
    • .NET
    • SQL Server

Projects

Products I design, build and run end to end.

Sporturno

Founder · SaaS for sports venues

Live

Players book and pay for courts straight from WhatsApp, and venue owners manage everything from one panel.

  • Booking inside WhatsApp with WhatsApp Flows on the Meta Cloud API, one tenant per venue.
  • Mercado Pago checkout with automatic commission split per booking.
  • Admin panel for venues plus a resale marketplace so players can hand off their slot.
  • Meta Tech Provider application in progress.
  • .NET 8/9
  • Clean Architecture
  • EF Core
  • MySQL
  • WhatsApp Cloud API
  • Mercado Pago
  • Vue 3
  • Astro
sporturno.app

OfertArgentina

Reverse real-estate marketplace

Buyers and tenants post what they are looking for (budget, area and property type) and sellers or agencies reach out through private messaging.

  • .NET 8 Web API
  • EF Core
  • MySQL
  • JWT + refresh tokens
  • Google Sign-In
  • Vue 3
  • TypeScript
ofertargentina.com.ar

Analizando Seguidores

Privacy-first Instagram tool

Shows who doesn't follow you back and who unfollowed you, from your own Instagram export. It runs entirely in the browser: no passwords, no backend, files never leave the device.

  • Vue 3
  • TypeScript
  • Pinia
  • Vuetify
  • Vite SSG
analizandoseguidores.com

Core skills

Core strength

C# & .NET

C# (.NET Core 3 to .NET 9), ASP.NET, REST APIs, microservices, Orchard Core

Core strength

Vue.js

Vue.js 2/3, Composition API, TypeScript

Domain

Payments, QR interoperability, cross-border transactions, banking, fintech integrations

Also worked with

NestJS, Node.js, JavaScript, React.js, Angular

Data

MySQL, SQL Server

Platform & ops

Azure DevOps, CI/CD, Datadog observability

Education & learning

It is in practice that one learns the most, and in theory that one consolidates one's knowledge.

  • Systems Engineering (coursework)UTN, Facultad Regional Córdoba · 2017–2018

Learning paths

Courses