Lucas Mantovani

Software Engineer

Backend engineering / Product delivery

Building reliable software for real users.

I am a software engineer focused on backend systems, product architecture, and high-quality delivery. I turn business requirements into tested, documented software with low time-to-market and clear operational behavior, currently building fraud prevention products at Sardine AI with Golang services and React interfaces.

About

Pragmatic engineering with a broad technical base.

I started programming in 2014 and have worked across business intelligence, university initiatives, scientific research, and large-scale product development. Those contexts shaped how I approach software: understand the problem, choose dependable tools, and keep improving the system after it ships.

My day-to-day work spans architecture, backend services, frontend product flows, backlog planning, cross-team communication, and mentoring. I am most at home where technical decisions need to balance product impact, maintainability, and operational confidence.

Experience

Selected work history.

  1. Jan 2025 - Present

    Software Engineer at Sardine AI
    Fraud prevention platform

    Plan, design, and implement product features for Sardine's fraud prevention platform. Recent work includes operational workflows for manual review queues and testing capabilities for workflow backtests and advanced aggregations, delivered as separate services to protect operational systems.

    • Golang
    • JavaScript
    • React
    • Google Cloud Platform (GCP)
    • Architecture
    • Testing

  2. May 2021 - Dec 2024

    Software Engineer at Mercado Libre
    Backend and product engineering

    Planned, designed, and aligned a decoupled application architecture using Golang, asynchronous messaging, and key-value storage for high-throughput workloads. Supported external integrators, improved backend SDKs, mentored new hires, and built checkout security features for card data acquisition.

    • Java
    • Go
    • JavaScript
    • TypeScript
    • Git
    • Datadog
    • New Relic

  3. Sep 2020 - May 2021

    Developer at ViewB
    Business intelligence platform

    Developed frontend features for a BI platform, improved data-heavy user flows, and investigated issues in grouped query results from application behavior through database migrations.

    • Java
    • JavaScript
    • TypeScript
    • Angular
    • PostgreSQL
    • Flyway

Skills

Core tools and working strengths.

Technologies

  • Golang
  • Java
  • JavaScript
  • TypeScript
  • HTML
  • CSS
  • Git
  • Jira

Languages

  • Portuguese native
  • English advanced
  • Spanish advanced
  • Italian beginner

Projects

Small tools and experiments.

A few practical projects that reflect how I like to work: direct, useful, and grounded in real decisions.

Financial decision tool

Pay Now or Later

A lightweight calculator that compares paying upfront with a discount against keeping money invested and paying over time. Built as a focused browser tool with clear inputs and an immediate recommendation.

  • HTML
  • CSS
  • JavaScript
Open project