Summary
Overview
Work history
Education
Skills
Languages
Timeline
Generic

Colemar Araújo Aguiar

Dublin,Ireland

Summary

Software Developer with over 5 years of experience building, maintaining, and modernising enterprise applications using Microsoft technologies.

My core expertise includes C#, .NET Framework, .NET Core, ASP.NET MVC, Web API, SQL Server, and Vue.js. Throughout my career, I have worked across the full software development lifecycle, including legacy system modernisation, backend development, RESTful APIs, database optimisation, CI/CD, and application maintenance.

In addition to my technical background, my experience as an IT Officer in the Brazilian Army has strengthened my leadership, team management, communication, decision-making, accountability, and stakeholder management skills . I have led teams, coordinated technical activities, managed third-party technology providers, overseen technical deliverables, and made decisions in environments requiring responsibility, organisation, and effective problem-solving.

I am passionate about solving complex technical problems and building reliable, scalable solutions that deliver real business value. Currently based in Dublin, Ireland, I am actively seeking opportunities as a Software Developer, .NET Developer, or Backend Developer.

Overview

3
3
Languages
3
3
years of post-secondary education
8
8
years of professional experience

Work history

Second Lieutenant | IT Officer

Brazilian Army (systems development centre)
Brasília, Brasil
2025.07 - 2026.07
  • Developed, maintained, and enhanced software systems used by the Brazilian Army, contributing to the full software development lifecycle.
  • Led and managed technical teams, coordinating personnel, assigning responsibilities, and ensuring the delivery of operational and technical objectives.
  • Managed software development contracts with third-party technology providers, acting as Technical Contract Inspector and overseeing technical deliverables, quality, and compliance with contractual requirements.
  • Owned and managed CI/CD pipelines for projects within the section, supporting automated build, testing, and deployment processes.
  • Collaborated with internal stakeholders and external technology providers to analyse requirements, solve technical issues, and deliver software solutions.

.NET Developer

Solistica
2025.03 - 2025.07
  • Developed and maintained enterprise web applications using C#, .NET Framework, ASP.NET WebForms, ASP.NET MVC, Web API, and .NET Core.
  • Designed and implemented RESTful APIs to support business-critical systems.
  • Optimized SQL Server databases by developing stored procedures, functions, views, and high-performance queries.
  • Built and maintained backend services with a focus on scalability, reliability, and maintainability.
  • Worked closely with business stakeholders to translate requirements into technical solutions.
  • Diagnosed production issues, fixed bugs, and improved overall application performance.

Technology Analyst

Geap Autogestão em Saúde
Brasília, DF
2024.05 - 2025.03
  • Developed new enterprise applications using C# and .NET.
  • Mentored junior/mid-level developers and contributed to technical best practices.
  • Built REST APIs using .NET Core.
  • Developed modern user interfaces with Vue.js.
  • Optimized SQL Server databases using T-SQL.
  • Collaborated with developers and business teams throughout the software development lifecycle.
  • Modernized legacy systems.

Software Developer

Geap Autogestão em Saúde
Brasília, DF
2022.08 - 2024.05
  • Development and maintenance of the new and legacy systems.

Software Engineer Intern

Tribunal Regional Federal da 1ª Região
Brasília, DF
2022.01 - 2022.08
  • Developed PHP/Laravel applications integrated with the Brazilian Electronic Judicial Process (PJe) platform.
  • Contributed to the development of a case management system used by higher courts to process case suspensions and resumptions.
  • The solution also provided automated alerts within PJe to prevent lower courts from proceeding with cases that were subject to pending higher court decisions, reducing unnecessary work, improving workflow efficiency, and supporting a more streamlined judicial process.

Software Engineer Intern

Geap Autogestão em Saúde
Brasília, DF
2021.04 - 2021.09
  • Maintained and enhanced enterprise applications, implementing new features and improving existing functionality.
  • Developed data migration scripts to support system upgrades and database transitions.
  • Provided technical support for software maintenance, troubleshooting, and day-to-day development activities.
  • Collaborated with the development team to ensure the stability and continuous improvement of internal systems.

Software Developer

University of Brasília
2021.04 - 2021.07
  • Developed and maintained internal web applications for the University's Health Care and Epidemiological Surveillance Coordination (CoAVS).
  • Designed, implemented, and enhanced software solutions based on the department's operational requirements.
  • Maintained and updated internal platforms and application frameworks to support epidemiological surveillance activities.
  • Worked closely with stakeholders to translate business requirements into technical solutions and deliver new features.

Teaching assistant

University of Brasília
Brasília, Brasil
2021.02 - 2021.06

•  Supported students in learning programming fundamentals, algorithms, and problem-solving using Python.
•  Provided technical guidance during the development of final projects, helping students apply programming concepts in practical scenarios.

High School Intern

TJDFT
Brasília, Brasil
2018.10 - 2019.06

•  Helped the court office complete the migration to the PJe system ahead of the established deadline .
•  Provided IT, operational, and administrative support to court staff during the transition to the Brazilian Electronic Judicial Process (PJe) system.
•  Developed practical processes and techniques to streamline the system migration and improve the efficiency of the transition.

Education

Postgraduate Diploma | Specialist Degree - Cloud Computing Architecture and Design

GRAN
Brasília
2024.01 - 2024.09

Higher Technology Degree - Systems Analysis and Development, Computer Software Engineering

University Católica De Brasília
Brasília
2022.01 - 2023.12

Bachelor's Degree - Software Engineering

University of Brasília
Brasília/Brazil

English

SEDA | College,
Dublin, Ireland
2026.07 -

Skills

    C# NET NET Core ASPNET MVC ASPNET Web API ASPNET WebForms REST APIs SQL Server T-SQL Vuejs JavaScript Azure DevOps CI/CD Git PHP Laravel VBNET

Languages

English
Portuguese
Spanish

Timeline

English

SEDA | College,
2026.07 -

Second Lieutenant | IT Officer

Brazilian Army (systems development centre)
2025.07 - 2026.07

.NET Developer

Solistica
2025.03 - 2025.07

Technology Analyst

Geap Autogestão em Saúde
2024.05 - 2025.03

Postgraduate Diploma | Specialist Degree - Cloud Computing Architecture and Design

GRAN
2024.01 - 2024.09

Software Developer

Geap Autogestão em Saúde
2022.08 - 2024.05

Higher Technology Degree - Systems Analysis and Development, Computer Software Engineering

University Católica De Brasília
2022.01 - 2023.12

Software Engineer Intern

Tribunal Regional Federal da 1ª Região
2022.01 - 2022.08

Software Engineer Intern

Geap Autogestão em Saúde
2021.04 - 2021.09

Software Developer

University of Brasília
2021.04 - 2021.07

Teaching assistant

University of Brasília
2021.02 - 2021.06

High School Intern

TJDFT
2018.10 - 2019.06

Bachelor's Degree - Software Engineering

University of Brasília
Colemar Araújo Aguiar