Jaquiel D.
Principal Engineer

Skills

.NET

Node.js

Cascading Style Sheets

Delphi

Microsoft Sql Server

Oracle Database

Html

Javascript

Php

Python

Mysql

Mongodb

React

Jaquiel is available for hire

Hire Jaquiel D.

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Bio

Software Developer with over 13 years of experience specializing in software development across a spectrum of applications, utilizing major technologies, diverse programming languages, and principal databases. Possesses extensive expertise in functional programming, Object-Oriented Programming (OOP), SOLID principles, and Design Patterns, alongside a deep understanding of best development practices, Test-Driven Development (TDD), and automated testing. Currently based in Portugal with intentions of relocating to Brazil in the near future.

Senior Software Engineer
2/1/2022 - Present

Focused on the development of new features and maintenance of the backend for an e-commerce platform specializing in construction materials, renovation, and gardening. Demonstrated technical expertise in C# and .NET, while developing REST APIs and implementing authentication using Reach5 and CIAM. Mastery in working with databases including MySQL, SQL Server, and MongoDB. Leveraged Node.js, Azure Functions, Azure DevOps, Azure Pipelines, and Azure Deployment for efficient and scalable backend solutions. Employed JWT for secure authentication and authorization. Adhered to Domain-Driven Design (DDD) principles to structure projects effectively. Maintained version control and collaborative code management using Git, and contributed to Agile development workflows using the Scrum methodology.
Senior Software Engineer
11/1/2021 - 2/1/2022

Accomplished in the outsourcing aspect of developing and migrating a new BackOffice for an e-commerce platform specializing in female products and accessories across approximately 20 European countries, leveraging Salesforce CRM integration. Spearheaded the development of new features and performed extensive database development using Oracle, including crafting SQL scripts to enhance system performance. Contributed to the backend development, focusing on REST API implementation, while also participating in the frontend development using a range of modern technologies.

Developed technical proficiency in C#, .NET 5, and Domain-Driven Design (DDD) principles. Utilized Blazor WebAssembly, HTML, and JavaScript to build robust and responsive user interfaces. Demonstrated expertise in database management with Oracle and ensured seamless development workflows and CI/CD processes using Azure DevOps and Git. Applied Agile methodologies, specifically Scrum, to ensure collaborative and efficient project delivery.
Remote Software Developer
11/1/2020 - 11/1/2021

Contributed to the development and maintenance of software tailored for Specialty and Primary Care products, Patient Support Programs, and Diagnostic Programs utilized by the pharmaceutical industry, physicians, and patients. This involved the creation of new features and enhancements within the software, specifically targeted at improving functionality and user experience. Significant expertise was developed in database feature development and SQL scripting, primarily using MSSQL Server.

Gained proficiency in backend development, focusing on introducing new services and maintaining existing ones to ensure seamless operation. Additionally, engaged extensively in frontend development for new web applications as well as the upkeep of current applications.

Core technical competencies include C#, .NET Core, and .NET for software development, alongside frontend technologies such as React.js and JavaScript. Utilized MSSQL Server for database management and scripting. Employed Azure DevOps for project management and continuous integration/continuous deployment (CI/CD) processes. Ensured code integrity and collaborative development through Git. Adhered to Scrum methodologies to manage project delivery efficiently and iteratively.
Remote Senior Software Developer
1/2/2020 - 7/2/2020

Acted as an outsource in legacy software for the automation of the digital process within the justice system, specifically for courts of justice, promoting integration among participants in the judicial process, including citizens, public and private entities. Responsibilities included providing technical support, correcting and developing new functionalities, software documentation, data modeling, and database support for Oracle, SQL Server, and occasionally DB2. Developed proficiency in SQL Server, Delphi 5, and Delphi 10.2 Tokyo. Demonstrated capabilities in deploying software using Final Builder 8 and managing projects with IBM Rational Team Concert. Employed Scrum methodologies for collaborative development and project management.
Systems Analyst Developer
1/2/2016 - 1/2/2020

Involved in the development and maintenance of production management software for pig-producing farms. Responsibilities included providing technical support, correcting issues, and developing new features. Proficiency in automated functional testing using the DUnit Framework was developed. Engaged in extensive software documentation and data modeling, as well as database support for Access, Firebird, Oracle, with occasional work on PostgreSQL and MySQL. Developed and optimized SQL scripts to enhance database functionality and performance.
Systems Analyst Developer
1/2/2015 - 1/2/2016

Developed proficiency in managing incidents and changes in Collection Management software for Credit Recovery, utilizing skills in PHP, JavaScript, HTML, CSS, and Delphi 7 (legacy). Provided technical support, corrected and enhanced functionalities, and developed SQL scripts for SQL Server databases. Involved in the project development for accreditation software for fairs and events, focusing on solution development, functional implementation, software documentation, and data modeling. Utilized technologies including PHP, JavaScript, HTML, CSS, Bootstrap, and MySQL for effective project execution.
Systems Developer N3
1/2/2013 - 1/2/2015

Acquired substantial experience working in the Systems Support team for insurance management software, focusing on end-user support, incident resolution, and problem identification. Developed proficiency in executing SQL scripts to resolve incidents and fulfill requests, while ensuring the proper linking of incidents and problems. Utilized SQL Server for database management and applied skills in .NET and Delphi 2009, XE2 for software maintenance and enhancements. Employed ITIL methodologies to streamline IT service management processes and adhered to Scrum practices for efficient project management and team collaboration.
Systems Programmer
1/2/2013 - 1/2/2013

Developed new features and performed maintenance for ERP software, specifically within the Fiscal module. Utilized Scrum methodology to facilitate project management and team collaboration. Employed MAGIC Programming Language and worked extensively with SQL Server, Oracle, and DB2 databases. Demonstrated expertise in integrating and managing multiple database systems to support the ERP software functionality.
freelancer
1/2/2012 - 1/2/2012

Engaged in the development of Point of Sale (POS) and Back Office software, specializing in the issuance of Electronic Invoices (NF-e) and Tax Coupons (ECF). Demonstrated technical expertise in designing and implementing robust software solutions for retail environments. Consistently applied best practices to ensure compliance with local tax regulations and improve transaction efficiency. Developed skills in software engineering practices, system integration, and problem resolution to deliver reliable and user-friendly financial solutions.
Delphi Programmer
1/2/2010 - 1/2/2012

Developed and maintained ERP software across all modules using the Delphi programming language with a Firebird database. Executed the development of new features and ensured continuous improvement of existing functionalities.
freelancer
1/2/2009 - 1/2/2009

Developed proficiency in creating Point of Sale (PoS) software for self-service terminals (kiosks), focusing on optimizing sales transactions. Gained deep expertise in software architecture and system integration for transactional data processing. Utilized programming languages and frameworks relevant to PoS systems, ensuring high performance and reliability. Employed tools for version control and collaborative development, ensuring efficient code maintenance and updates. Demonstrated ability to work in a fast-paced environment, delivering robust and secure software solutions, enhancing user experience at sales points.
Delphi Programmer
1/2/2008 - 1/2/2009

Led the development of new features and maintenance for Medical Management Software, utilizing Delphi Programming Language and Oracle database. Gained expertise in medical software development and demonstrated strong abilities in database management and software maintenance.
Delphi Programmer
1/2/2007 - 1/2/2008

Developed new features and maintained the municipal health system utilizing the Delphi programming language combined with the Firebird database. Enhanced technical expertise in Delphi, streamlining features, and ensuring robust system maintenance to support healthcare services.