Caio César de Campos Silva, Developer in Lisbon, Portugal
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Caio César de Campos Silva

Verified Expert  in Engineering

Software Developer

Lisbon, Portugal
Toptal Member Since
September 28, 2022

Caio is a senior Java engineer and technical leader with vast experience with Java, Spring Boot, SQL databases, Kubernetes, back-end architecture, and cloud services. He enjoys challenges and has had great success recently in building reliable, scalable, and secure systems for a multinational company. Caio also learns fast and is looking for new high-end technologies to bring better solutions to clients.


KIS Solutions
Java 8, Spring Boot, Spring JDBC, Spring Security, JSON Web Tokens (JWT)...
KIS Solutions
Java 8, IntelliJ IDEA, MySQL, Spring Boot, Spring, Agile Software Development...
Java 8, Kotlin, Spring Boot, REST APIs, PostgreSQL, Scheduling




Preferred Environment

Java, Spring Boot, Databases, Docker, IntelliJ IDEA, Git, Kubernetes, Agile Software Development

The most amazing...

...project I've worked on is a product recommender system for a multinational company in which I led the team as an architect and main developer.

Work Experience

Senior Java Developer and Team Lead

2021 - 2022
KIS Solutions
  • Designed and developed a product recommender system to replace a paid tool and save the company $1 million per year.
  • Deployed, maintained, and monitored two major systems using Kubernetes in the Google Cloud Platform.
  • Coordinated and designed a migration from a legacy transactional messaging system to a new, flexible, scalable architecture.
  • Led a team of five people to build a couple of platforms and renewed the company's systems with more recent technologies.
  • Collaborated with business partners to redesign the engineering flow and improve business satisfaction.
  • Coordinated a project to assess the quality and provide suggestions and improvement points for a collection of production REST APIs.
Technologies: Java 8, Spring Boot, Spring JDBC, Spring Security, JSON Web Tokens (JWT), Kubernetes, Docker, Google Cloud Platform (GCP), Helm, BigQuery, Object-oriented Programming (OOP), PostgreSQL, MySQL, Apache Kafka, JUnit, APIs, REST APIs

Senior Full-stack Developer

2019 - 2021
KIS Solutions
  • Maintained and developed new features for a chatbot system that provided customer services.
  • Improved the deployment pipeline decreasing the build time using Maven.
  • Replaced an old enterprise customer service application for a new web platform built using new technologies, such as Angular, Java, and Spring Boot.
  • Created a new module to handle customer order inconsistencies from different systems and improved customer service response time.
Technologies: Java 8, IntelliJ IDEA, MySQL, Spring Boot, Spring, Agile Software Development, Apache Maven, Jenkins, REST APIs, JUnit

Software Engineer

2015 - 2018
  • Started the implementation of Kotlin as a new core language at the team and started the migration of a few features and projects.
  • Maintained systems to provide comprehensive APIs for businesses to send SMS to customers.
  • Developed internal systems to increase the business team productivity and add new features for messaging services.
  • Improved a complex scheduling system to deliver customer communication based on business configurations.
Technologies: Java 8, Kotlin, Spring Boot, REST APIs, PostgreSQL, Scheduling

Software Enginneer Intern

2014 - 2015
  • Maintained SMS messaging systems to provide services to final customers.
  • Developed custom HTML landing pages to attract new customers.
  • Tested and maintained REST APIs to provide services to other companies.
Technologies: Java, Spring, Spring Boot, MySQL, Agile Software Development, Apache Maven, Object-oriented Programming (OOP)

Java Boilerplate Project

A boilerplate generator API to generate Java projects from a pre-created collection of source code, similar to Spring Initializer, but with actual code for frameworks and integrations.

I designed and developed the project using my main stack, Java 8, Spring Boot, and PostgreSQL. The project exposes an API to specify the collection of features users desire, merging the source code for the selected features and adding the required dependencies into a single base code, generating a final version that can work as the starter project.
2014 - 2020

Bachelor's Degree in Computer Science

Universidade Estadual de Campinas - Campinas, São Paulo, Brazil


The Ultimate Guide to Kotlin Programming



Cracking the Google Associate Cloud Engineer Certification



Building Scalable Data Pipelines with Kafka





IntelliJ IDEA, Git, Slack, Apache Maven, BigQuery, Helm, Jenkins, Jira, Postman


Spring Boot, Hibernate, Spring Security, Spring, JUnit, JSON Web Tokens (JWT), Spring JDBC


Java, Java 8, Kotlin, SQL, Python


Object-oriented Programming (OOP), REST, Functional Programming, Back-end Architecture, Agile Software Development


PostgreSQL, Databases, MySQL, Spring Data JPA, Amazon S3 (AWS S3), Hazelcast


Kubernetes, Google Cloud Platform (GCP), Apache Kafka, MacOS, Linux, Docker, Amazon Web Services (AWS)


APIs, Data Structures, Algorithms, Software Architecture, Cloud Computing, Distributed Systems, Networking, Scheduling

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