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DL Dalton Lins
PTEN

Full Stack Developer

Dalton Lins

8 years building fast, secure and scalable systems, focused on backend, databases and Android apps.

Get in touch View experience

Most used

  • C#
  • Rust
  • Java
  • Kotlin
  • Android
  • .NET
  • SQL Server
  • PostgreSQL
  • Docker
  • Python

About

I started programming as a teenager, building Minecraft plugins and servers, and never stopped. I studied at IFRN, have worked as a full stack developer since 2021, and I'm currently studying Computer Science and Game Design. I enjoy problems that require understanding the whole system, from a slow database query to a server under attack.

Experience

CSJ Group

Full Stack Developer on the Datasys product

2021 — present

  • Distributed price management

    A system that centralizes price management and distributes it across multiple companies, keeping prices consistent in all of them.

  • Payments via TEF and APIs

    Integration with electronic payment methods through TEF and APIs, connecting the point of sale to the payment.

  • Smart POS

    A payment system that runs directly on Smart POS terminals, bringing the sale and the charge onto the same device.

  • Electronic invoicing

    Electronic invoice issuing built into the sales flow, meeting Brazilian tax requirements.

  • SQL Server and DBA

    Query optimization, SQL Server administration and concurrency handling on large databases with many simultaneous connections.

  • Android app

    A native Android app built with Kotlin and Jetpack Compose, from interface design to implementation.

Independent

Minecraft plugins, mods, servers and store

Since 2018

  • Plugins and mods

    Plugins and mods that add custom mechanics and systems to the servers, written not to hurt game performance.

  • Performance and scalability

    Finding bottlenecks and tuning configuration and code to support more concurrent players without losing smoothness.

  • Traffic management

    Load balancing across proxies to spread player connections and keep the network available during traffic peaks.

  • Linux servers

    Installing, configuring and maintaining the Linux servers that host the network, from the operating system to the game services.

  • DDoS protection and WAF

    Mitigating denial-of-service attacks and web application firewall rules that filter malicious traffic before it reaches the servers.

  • OpenCart store

    Building and running the OpenCart shopping platform, from installation and customization to store maintenance.

Technologies

  • Languages and backend

    APIs, business logic and integrations between systems.

    • C#
    • .NET
    • Rust
    • Java
    • Kotlin
    • Python
    • Node.js
    • TypeScript
    • PHP
    • Django

  • Databases

    Modeling, optimization and administration, including large high-concurrency databases.

    • SQL Server
    • PostgreSQL
    • MySQL
    • MariaDB
    • MongoDB
    • Firebase

  • Mobile and frontend

    Native Android apps with Kotlin and Jetpack Compose, and web interfaces wired to the backend.

    • Android
    • Jetpack Compose
    • React Native
    • React
    • Next.js
    • Svelte
    • Tailwind CSS

  • Infrastructure and integrations

    Linux servers, load balancing across proxies, DDoS protection and WAF, TEF and Smart POS payments and electronic invoicing.

    • Linux
    • Docker
    • Git
    • Load balancing
    • DDoS
    • WAF
    • TEF : Card payments integrated into the system (electronic funds transfer)
    • Smart POS : Android-based card terminal
    • NF-e : Brazilian electronic invoice
    • OpenCart

Projects

Most of my work is private. These are public personal projects.

View all on GitHub

Education

  1. 2026 — present

    Bachelor's degree in Game Design

    UNP

    • 3D
    • Projects

  2. 2024 — present

    Bachelor's degree in Computer Science

    UNP

    • Concurrency algorithms
    • Advanced databases
    • Artificial intelligence
    • Development methodologies

  3. 2019 — 2023

    Technologist degree in Computing

    IFRN

    • Programming logic
    • C++
    • Java

Let's talk

Open to new opportunities as a full stack developer. Send me an email or reach out on LinkedIn.

contato@jdaltonlins.dev

LinkedIn GitHub