Hi, I'm Heraldo 👋
A software engineer who loves complex challenges and building projects that matter, feel free to get in touch.
HS

About

I started developing applications around 2014, since then i have always kept up with the latest trends in software engineering, cloud computing, AI-driven development, microservices and data-driven applications. I pursued a degree in business information systems where i also took part in a programming competition.

Skills

React
Next.js
Typescript
Node.js
.NET Core
FastAPI
Java
C#
Python
Cloud
Microservices
SQL
My Projects

Check out my latest work

I've worked on a variety of projects, from simple websites to complex desktop applications. Here are a few examples.

Portal do Contribuinte

Developed custom pages and UI on the Taxpayers portal using JPA, JSF and Primefaces, developed modules and integration with SIGT and Oracle's PSRM using Java, Spring, Oracle, Gitlab CI.

Java
JPA
JSF
Primefaces
Springboot
Oracle DB
Microservices
SOAP
Hibernate
Arduino RFID Module for MFRC522

Arduino RFID Module for MFRC522

Arduino sketch with RFID Library for MFRC522. The goal of this project was to create a data reader for vehicle immobilizer systems using RFID encryption.

C++
Arduino IDE
Arduino Nano
RFID Module MFRC522
Giant SA

Giant SA

A software prototype for an insurance company with a working model to visualize, test, and refine the user interface. It includes features such as claims processing and client handling.

React.js
Next.js
Typescript
Node.js
TailwindCSS
SQL
RecibosMCX

RecibosMCX

A receipt validator for a popular financial app. I decided to build this tool to validate the authenticity of receipts in order to avoid losses resulting from false and dishonest transfers.

React.js
Vite
TypeScript
TailwindCSS
.NET Core
EF Core
SQLite
OpenAPI
Gestreino

Gestreino

Gestreino emerges as an indispensable application that presents a set of tests that allow for standardized assessment to the effective prescription of a fitness training program.

ASP.NET
MVC
Plesk
SQL Server
Javascript

Factplus SaaS

FactPlus is an invoice SaaS that was built to accommodate the need of many companies and self-employed individuals that still use manual and poorly automated methods.

Javascript
PHP
CpanelUAPI
Bootstrap
MySQL
Domains

I like building things

Over the course of the years i have built projects across different domains working with teams across Brasil, India and Portugal, here are a few of them.

  • P

    Portal do Contribuinte

    Luanda, AO

    Developed custom pages and UI on the Taxpayers portal using JPA, JSF and Primefaces, developed modules and integration with SIGT and Oracle's PSRM using Java, Spring, Oracle, Gitlab CI.
  • M

    Microsserviços, Reporting

    Luanda, AO

    Developed custom API services with Java, Spring, OpenAPI and SOA services including report design and development with Jasper studio and Jasper libs for Java.
  • P

    Portal SAFT

    Luanda, AO

    Developed code for SAFT modules built with Node.js, Vue.js, Java, Microservices, Oracle webserver and database 12c.
  • P

    PIAGEST

    Luanda, AO

    Developed and led an ambitious project born from the need of an agile platform for higher education institutions. It offers a complex management solution of the diverse academic sector including departments, centers, schools and faculties of the Piaget Institute of Angola (Jean Piaget University of Angola, Jean Piaget Higher Polytechnic Institute of Benguela).
  • P

    Portal do Aluno, Sigarra

    Luanda, AO

    Developed custom student portal to accommodate ongoing and alumni students for legacy systems and records, heavily integrated with core academic systems to provide accurate records, built with ASP.NET, Oracle and MS SQL databases.
  • G

    Gabinete de Coordenação de Trabalhos de Fim de Curso

    Luanda, AO

    Developed custom software for the Thesis/Dissertation department, handling student's final year project management with main focus on organization, heavy reporting (30+), and data visualization for informed decisions and accurate records.
  • S

    SigReports

    Luanda, AO

    Developed a custom reporting tool to manage data extraction more efficiently, from student records, financial data, cash reports, bursary records to government statistics and custom reports. Integrated with various data sources for easy access and management.
  • C

    Centro de Motricidade Humana

    Luanda, AO

    Developed custom software for the Human Motricity Center, handling clients, payments, schedules, fitness programmes and reporting. The system was built using .NET and WF with an MS SQL database.
  • W

    Website Institucional

    Luanda, AO

    Developed a complete website for the institution's domain, along with a custom built CMS to manage content and pages of the university campus in Luanda.
  • S

    Secretaria Académica e Pedagógica

    Luanda, AO

    Developed and upgraded the Academic office software, main functions include student records management, grades, bursary programmes, special exams registration and various types of student letters and documentation. The system was built using .NET, C#, WF and SAP Crystal Reports with Oracle and MS SQL databases, upgraded from VB and VBA, and integrated within the UMS system built with Java.
  • S

    Sumários

    Luanda, AO

    Developed Timetable management solutions to plan, validate and publish academic schedules. Timetable management is one of the most critical, and most chaotic jobs in higher education operations. As institutions grow, spreadsheet-based schedules and static PDFs struggle to cope with full-time and part-time programs, electives, labs, research hours and cross-department teaching.
  • B

    Biblioteca

    Luanda, AO

    Developed a full scale library management system using the CDU classification, integrated with public pages on the university website for content search and classification.
  • R

    Recursos Humanos

    Luanda, AO

    Developed custom software to manage HR policies, Employees Time tracking integrated to biometric attendance systems, Leaves, Holidays and Absences as well as advanced reporting for decision making purposes. The system was built using .NET and WF and integrated with existing ERP systems such as Logic pulse and CentralGest.
  • C

    Contabilidade, Reporting

    Luanda, AO

    Designed and developed reports for financial departments and higher hierarchy, the information provided actionable insights that informed business decisions and strategies.
  • F

    Factplus SaaS

    Luanda, AO

    FactPlus is an invoice SaaS that was built to accommodate the need of many companies and self-employed individuals that still use manual and poorly automated methods. It offers intuitive, simple, and easy-to-use invoicing, providing an alternative to existing softwares on the market and reducing costs from their high licensing fees.
  • S

    Sistema de Gestão de Recrutamento e Seleção

    Luanda, AO

    Developed a recruitment and selection management system, it's a software that automates and centralizes the entire hiring process, from posting job openings, collecting and screening resumes, scheduling interviews, administering tests, to communicating with candidates, using technology to streamline tasks, reduce costs, improve the experience, and ensure that the company attracts and hires the best talent efficiently and strategically.
  • A

    Associação de Escuteiros de Angola

    Luanda, AO

    Developed a full stack web application to manage The National Scouting organization of Angola (NGO), it was founded in 1994 and became a member of the World Organization of the Scout Movement on June 13, 1998. This project involved a complex architecture of the various administrative regions including members, events, and activities.
Contact

Get in Touch

Want to chat? Just shoot me a dm on Linkedin and I'll respond as soon as possible. Kind regards.