Ary Guedes Lins, Developer in Recife - State of Pernambuco, Brazil
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Ary Guedes Lins

Verified Expert  in Engineering

Software Developer

Recife - State of Pernambuco, Brazil
Toptal Member Since
July 3, 2022

Ary is a problem solver and software engineer who aims to deliver efficient, reliable, and scalable software products. He has over six years of experience within several contexts, such as enterprises, multinational research and development, and product-driven startups. Ary is an enthusiast for test-driven development, clean code/architecture, and design patterns to improve software maintainability while considering the tradeoffs between quality, costs, and delivery time.


TypeScript, Node.js, Kotlin, NestJS, Spring, Java, Amazon Web Services (AWS)...
Python, Flask, Amazon Web Services (AWS), C++, C, MQTT, Mbed, Android, Node.js...
Consenso Tecnologia
Java, Spring, PostgreSQL, Oracle, Jakarta Server Pages (JSP), Apache Struts...




Preferred Environment

Node.js, Visual Studio Code (VS Code), IntelliJ IDEA, Kotlin, Slack, Amazon Web Services (AWS), TypeScript, NestJS, Spring

The most amazing...

...project I've developed is a back end for a customer follow-up page which improved the company's NPS from a negative value to 70%.

Work Experience

Software Engineer

2020 - PRESENT
  • Built software products in an agile and multidisciplinary team that improve customers' journey on the company's financial products, specifically in a real estate mortgage process.
  • Developed high-quality and well-tested with more than 80% coverage code for back-end REST API's in Node.js, Kotlin, and Java.
  • Integrated company back-end systems with third-party CRMs used by commercial teams such as Salesforce and Zendesk Sell improving the team's productivity with automation.
  • Partnered with product designers and product managers to create the customer sections, where Loft customers could track their mortgage process, which improved the customer NPS to 70%.
Technologies: TypeScript, Node.js, Kotlin, NestJS, Spring, Java, Amazon Web Services (AWS), REST, PostgreSQL, MongoDB, Zendesk API, Databricks, TypeORM, AWS Lambda, REST APIs, JavaScript, Express.js, Amazon S3 (AWS S3), Docker, React, Git, Databases

Software Engineer

2018 - 2020
  • Participated in several projects for multinational companies helping the company's research and development team with technological innovation.
  • Designed and implemented steps for a machine learning pipeline from data extraction to model deployment using tools such as Kubeflow/Kubernetes, Seldon, Flask/Python, and AWS IoT/Greengrass.
  • Developed a C library using MQTT, Jansson (JSON library), and proprietary cryptographic libraries to implement the AoT protocol described in a research paper (
  • Worked on a software product to help a Brazilian public company, B3, manage their employees' working hours, coded new features, fixed bugs, and improved the security of a back-end API in Node.js and Express alongside a native Android app in Java.
Technologies: Python, Flask, Amazon Web Services (AWS), C++, C, MQTT, Mbed, Android, Node.js, REST APIs, JavaScript, Express.js, Amazon S3 (AWS S3), Docker, Git, Databases

Software Engineer

2016 - 2018
Consenso Tecnologia
  • Helped maintain and improve software products for the company's clients, especially utility companies.
  • Designed and implemented a monolith software written using Java and Apache Struts on the server-side and Java Server Pages (JSP) on the front end.
  • Maintained satellite products, such as Android apps integrated with the main system.
  • Developed features, improvements, fixes, unit tests, and integration tests within a Java Spring web application.
Technologies: Java, Spring, PostgreSQL, Oracle, Jakarta Server Pages (JSP), Apache Struts, Android, JasperReports, REST APIs, JavaScript, Git, Databases

Clean Code and Clean Architecture Project
Developed the back-end API in Node.js as the final project for a clean code and clean architecture course. The project consists of a basic API for an eCommerce application divided into three layers:
• Domain: Core business rules
• Application: Application business rules orchestration
• Infrastructure: Frameworks, libraries, and drivers


TypeScript, JavaScript, Kotlin, Java, Python, SQL, C++, C, Haskell, SystemVerilog, VHDL, HTML5


NestJS, Spring, Express.js, Jakarta Server Pages (JSP), Apache Struts, Flask


Node.js, REST APIs, JasperReports, Zendesk API, React


APIs, Mbed, TypeORM, Algorithms, Data Structures, FPGA, Embedded Systems, Front-end


IntelliJ IDEA, Git, MQTT


Linux, Amazon Web Services (AWS), AWS Lambda, Docker, Visual Studio Code (VS Code), Oracle, Android, Databricks, MacOS


PostgreSQL, MongoDB, Amazon S3 (AWS S3), Databases



2012 - 2017

Bachelor's Degree in Computer Engineering

The Federal University of Pernambuco (UFPE) - Recife, Brazil

2015 - 2016

Exchange Program in Computer Engineering

The University of North Carolina at Charlotte - Charlotte, NC, United States

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