About

Learn more about me

Developer Full Stack

Information technology professional since 1999, lover of programming, mainly full stack, games and innovations.

  • Birthday: 18 February 1979
  • Website: www.leocostadeveloper.com
  • Phone: +351 965 773 193
  • City: Lisbon, Portugal
  • Age: 47
  • Degree: Master
  • Email: contato@leocostadeveloper.com
  • Freelance: Available

Communicative, I like to work in teams, develop new skills and seek to share experiences with code. I am open to new learning and always looking for new developments.

Foto de Leonardo Costa

Happy Clients

Projects

Hours Of Support

Awards

Skills

Stack used to deliver ERP systems, institutional portals and integrations

10+ years
Software development
APIs & integrations
Secure data flow
SQL optimization
Procedures, triggers, events
Leadership
Delivery and teamwork

Backend

PHP Laravel OOP PSR-12 Design Patterns REST APIs

Frontend

JavaScript (ES6+) Vue.js React HTML5 CSS3 Responsive UI

Databases

MySQL MariaDB SQL Optimization Stored Procedures Triggers Events

DevOps & Tools

Git GitHub GitLab Git Flow Docker CI/CD

Monitoring & Performance

AppDynamics ServiceNow Logs Metrics Tracing .NET (Exposure)

CMS & E-commerce

WordPress Joomla Drupal Magento

Ways of working

Agile Scrum Kanban CI/CD SOLID TDD Project Management Team Leadership

Interests

Code code code

Design

Technology

Websites

Database

Maintenance

Manage content

Manage traffic

Play Games

Podcasts

Travel

Watch Movies

Testimonials

Leonardo delivered our website with great attention to detail, strong communication, and a clear focus on performance. He was proactive, reliable, and consistently kept the project moving.

Pedro Andrez

Pedro Andrez

CEO — veternys.com

Leonardo was crucial to delivering multiple brand websites with high quality and speed. He translated marketing needs into solid technical solutions and ensured stable releases and smooth iterations.

Paulo Marques

Paulo Marques

Marketing Manager — Bliss Repger & Grupo Multi Contact — espacoabsoluto.pt

We worked with Leonardo on web platform improvements and ongoing maintenance. He brought strong full stack expertise, clear planning, and dependable deliveries aligned with business priorities.

João Barroqueiro

João Barroqueiro

CEO — MyFormula — myformula.pt

Leonardo was a dependable partner from delivery to post-launch support. He understood the business context, proposed practical solutions, and maintained a high standard of code quality and communication.

Douglas

Douglas

CEO — SigmaSystem Group

Resume

Experience, education and core qualifications

Summary

Leonardo Costa da Silva

Software Developer | Full Stack Engineer | Project Manager

Professional Summary

Full Stack Software Developer and Project Manager with 10+ years of experience building web platforms, ERP systems and institutional portals for public and private sectors. Strong expertise in PHP/Laravel ecosystems, modern JavaScript and database optimization, with exposure to .NET enterprise environments through application monitoring and performance analysis.

Education

MBA in Information Management (Postgraduate)

Bachelor’s Degree in Systems Analysis and Development

Technical High School in Data Processing

Languages

  • Portuguese — Native
  • English — Intermediate
  • Spanish — Basic

Certifications

Cybersecurity Fundamentals

Digital Innovation One × Riachuelo

Artificial Intelligence Fundamentals

Digital Innovation One × Riachuelo

Professional Experience

Project Manager / Full Stack Developer (PHP – Laravel)

Jun 2025 – Present

Bliss-Repger (Multi Contact Group) — Portugal

  • Led planning, development and delivery of websites and platforms, ensuring deadlines, budgets and quality.
  • Built and maintained a custom ERP integrating sales, logistics, CRM and finance.
  • Delivered scalable solutions with PHP 8.2, Laravel, MySQL and Vue.js; implemented APIs and integrations.

Full Stack Developer

Apr 2024 – Present

Intermunicipal Community of Médio Tejo (CIMT) — Portugal

  • Developed a modular system for intermunicipal public procurement management.
  • Created 14 municipal websites, the CIMT portal and the Intermunicipal Agenda platform.
  • Optimized MySQL (procedures, triggers, events) and implemented REST integrations.

Monitoring & Performance Consultant

Aug 2024 – Dec 2024

AskBlue (Ageas — Temporary Support)

  • Monitored enterprise applications (including .NET) using AppDynamics and ServiceNow.
  • Diagnosed bottlenecks across services/APIs/databases via logs, metrics and traces.
  • Optimized SQL queries to improve response times and database efficiency.

Software Engineer / Team Lead

Feb 2023 – Apr 2024

Quantico Solutions

  • Built PHP/Laravel applications for public and private sector clients.
  • Led a team (3 developers + 3 interns) ensuring delivery and quality standards.
  • Applied SOLID, PSR standards, TDD and CI/CD practices; delivered REST integrations.

Team Manager & Educational Technology Developer

Feb 2012 – Jan 2023

CSA

  • Led multidisciplinary teams building educational platforms, LMS and academic management systems.
  • Delivered dashboards, simulators and automated evaluation systems; modernized platforms for UX and accessibility.
  • Worked with PHP, JavaScript, Laravel, MySQL, Joomla and WordPress.

Web Developer (PHP – Laravel) — Freelance

Sep 2021 – Jun 2024

SigmaSystem Group

  • Delivered custom websites and e-commerce using Laravel, WordPress, Magento and Drupal.
  • Built an internal support system with ticketing and workflow automation.
  • Customized WordPress/Magento themes and supported clients across the project lifecycle.

Web Developer — Freelance

Aug 2021 – Jun 2022

Belinger Digital

  • Developed websites and e-commerce solutions using PHP and WordPress.
  • Built responsive platforms with focus on performance and user experience.
  • Worked with WordPress/Joomla/Drupal/Magento and GitHub.

Services

What I build for companies and teams

Websites & Portals

Modern, responsive websites and institutional portals with performance, SEO basics and content management when needed.

Systems & SaaS

Design and development of web systems and SaaS platforms with authentication, permissions, dashboards and scalable architecture.

ERP & CRM Solutions

Custom modules to manage sales, logistics, customer workflows and financial routines, integrated into your operation.

APIs & Integrations

Secure integrations between internal systems and external services, improving data flow, automation and reliability.

Applications

From MVP to production: architecture, backend, APIs and interfaces that match your product goals and delivery timeline.

Consulting & Performance

Code quality, database optimization, monitoring and incident analysis to improve stability, response times and delivery process.

Portfolio

My Works

  • All
  • Systems / SaaS
  • E-commerce
  • Websites
  • Public Sector
GMCentral

GMCentral

ERP (multi-tenant)

GMC Mail Pulse

GMC Mail Pulse

CRM (mass email)

Praxisistem

Praxisistem

Municipal management system

veternys.com

Veternys

E-commerce (Laravel / Vite / React)

myformula.pt

MyFormula

E-commerce (OpenCart)

CIMT

CIMT & Municipal Portals

Joomla + integrations (14 municipalities)

Câmara Municipal de Alcanena

Alcanena

Municipal website

Câmara Municipal de Constância

Constância

Municipal website

Câmara Municipal do Entroncamento

Entroncamento

Municipal website

Câmara Municipal de Ferreira do Zêzere

Ferreira do Zêzere

Municipal website

Câmara Municipal de Mação

Mação

Municipal website

Câmara Municipal do Sardoal

Sardoal

Municipal website

Municipal websites

Municipal Websites

Médio Tejo municipalities

Tourism portals

Tourism Portals

Constância & Sardoal

Câmara Municipal da Sertã

Sertã

Municipal website

Câmara Municipal de Tomar

Tomar

Municipal website

Câmara Municipal de Torres Novas

Torres Novas

Municipal website

Câmara Municipal de Vila de Rei

Vila de Rei

Municipal website

Câmara Municipal de Vila Nova da Barquinha

Vila Nova da Barquinha

Municipal website

Turismo de Constância

Turismo de Constância

Tourism portal

Turismo de Sardoal

Turismo de Sardoal

Tourism portal

Grupo SigmaSystem

Grupo SigmaSystem

Website (WordPress)

espacoabsoluto.pt

Espaço Absoluto

Website

pacfarma.com

Pacfarma

Website (HTML / CSS / JavaScript)

Courses

Courses and certificates

Course Date Certificate
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Contact

Contact Me

My Address

Lisbon, Portugal

Social Profiles

Email Me

contato@leocostadeveloper.com

Call Me

+351 965 773 193

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