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I'm Reenan Martins, a Software Engineer and Team Leader based in Toronto, with 15+ years of professional experience in software development. I specialize in C#, C++, and SQL, with a strong foundation in OOP, design patterns, and software architecture. I’ve led development teams for over 3 years, implemented agile practices, and driven DevOps adoption across multiple projects. I deliver robust, scalable solutions across industries such as CAD, MES, accounting, and notary systems. I’m passionate about building maintainable architectures, fostering collaboration, and continuously improving code quality through testing, automation, and mentoring. I’ve designed and shipped backend platforms using .NET, JavaScript/TypeScript, and SQL across remote and hybrid environments, while aligning solutions with client requirements. I enjoy solving complex integration challenges, promoting SOLID principles, and mentoring teams to higher performance and reliability.…I'm Reenan Martins, a Software Engineer and Team Leader based in Toronto, with 15+ years of professional experience in software development. I specialize in C#, C++, and SQL, with a strong foundation in OOP, design patterns, and software architecture. I’ve led development teams for over 3 years, implemented agile practices, and driven DevOps adoption across multiple projects. I deliver robust, scalable solutions across industries such as CAD, MES, accounting, and notary systems. I’m passionate about building maintainable architectures, fostering collaboration, and continuously improving code quality through testing, automation, and mentoring. I’ve designed and shipped backend platforms using .NET, JavaScript/TypeScript, and SQL across remote and hybrid environments, while aligning solutions with client requirements. I enjoy solving complex integration challenges, promoting SOLID principles, and mentoring teams to higher performance and reliability.

Reenan Martins

Full Stack Developer, Back-End Developer, Web Developer, +1

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I'm Reenan Martins, a Software Engineer and Team Leader based in Toronto, with 15+ years of professional experience in software development. I specialize in C#, C++, and SQL, with a strong foundation in OOP, design patterns, and software architecture. I’ve led development teams for over 3 years, implemented agile practices, and driven DevOps adoption across multiple projects. I deliver robust, scalable solutions across industries such as CAD, MES, accounting, and notary systems. I’m passionate about building maintainable architectures, fostering collaboration, and continuously improving code quality through testing, automation, and mentoring. I’ve designed and shipped backend platforms using .NET, JavaScript/TypeScript, and SQL across remote and hybrid environments, while aligning solutions with client requirements. I enjoy solving complex integration challenges, promoting SOLID principles, and mentoring teams to higher performance and reliability.…I'm Reenan Martins, a Software Engineer and Team Leader based in Toronto, with 15+ years of professional experience in software development. I specialize in C#, C++, and SQL, with a strong foundation in OOP, design patterns, and software architecture. I’ve led development teams for over 3 years, implemented agile practices, and driven DevOps adoption across multiple projects. I deliver robust, scalable solutions across industries such as CAD, MES, accounting, and notary systems. I’m passionate about building maintainable architectures, fostering collaboration, and continuously improving code quality through testing, automation, and mentoring. I’ve designed and shipped backend platforms using .NET, JavaScript/TypeScript, and SQL across remote and hybrid environments, while aligning solutions with client requirements. I enjoy solving complex integration challenges, promoting SOLID principles, and mentoring teams to higher performance and reliability.

Available to hire

I’m Reenan Martins, a Software Engineer and Team Leader based in Toronto, with 15+ years of professional experience in software development. I specialize in C#, C++, and SQL, with a strong foundation in OOP, design patterns, and software architecture. I’ve led development teams for over 3 years, implemented agile practices, and driven DevOps adoption across multiple projects. I deliver robust, scalable solutions across industries such as CAD, MES, accounting, and notary systems. I’m passionate about building maintainable architectures, fostering collaboration, and continuously improving code quality through testing, automation, and mentoring.

I’ve designed and shipped backend platforms using .NET, JavaScript/TypeScript, and SQL across remote and hybrid environments, while aligning solutions with client requirements. I enjoy solving complex integration challenges, promoting SOLID principles, and mentoring teams to higher performance and reliability.

Skills

Experience Level

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Intermediate

Intermediate

Intermediate

Intermediate

Language

English

Fluent

Portuguese

Fluent

Spanish; Castilian

Advanced

Work Experience

Team Lead / Software Developer at Data Art

September 1, 2025 - September 1, 2025

Led engineering for enterprise systems, aligning solutions with client requirements. Built and launched backend architecture using C#, .NET, and Domain-Driven Design, improving scalability and maintainability. Delivered interactive prototypes (Blazor, JavaScript, HTML, CSS) to accelerate client feedback and reduce rework. Established a branching strategy and team workflow to increase delivery consistency, and authored technical specifications used as internal references.

Software Developer at Data Art

January 1, 2025 - January 1, 2025

Developed and maintained an accounting platform for insurance and financial institutions. Enhanced report module to display print progress and allow operation cancellation. Resolved performance and stability issues in the database layer. Improved overall system reliability using C++, C# (.NET), and SQL.

Software Developer / Integration Developer at Graebert

March 1, 2024 - March 1, 2024

Built CAD software features and improved development processes. Added unit tests (DocTests) and Conan Package Manager to modernize builds. Automated workflows with Python and Jenkins, cutting manual tasks. Developed C++/C# (STL, Qt, WinForms) features to enhance CAD performance. Led developer training sessions to improve code quality. Worked closely with clients to define solutions, conduct code reviews, and support sprints.

Team Lead / Software Developer at Klassmatt Integra S.A.

September 1, 2021 - September 1, 2021

Led the creation of a new product, establishing full-stack architecture, CI/CD processes, and training cross-functional teams while coordinating with business analysts for requirements implementation. Set up Azure DevOps Pipelines for build, test, and delivery automation. Implemented unit and interface testing, improving code coverage and reliability. Defined architecture for new projects using C#, VB.NET, Vue, and SQL. Trained the development team on agile and testing practices.

Software Developer / Integration Developer at CWIS Software

April 1, 2021 - April 1, 2021

Developed financial systems for DLL Bank with modern .NET and JavaScript stacks using microservices architecture. Delivered new features and maintained systems using C#, SQL, and AngularJS. Enhanced data access performance with Dapper ORM. Supported microservices integration, improving modularity and scalability.

Team Lead / Software Developer at SKA Automação de Engenharia S/A

October 1, 2020 - October 1, 2020

Led development of MES and ECAD software integrating with ERP systems (SAP, TOTVS). Migrated version control (SVN) to Azure DevOps (Git) and automated builds/tests. Promoted SOLID and unit testing culture, improving maintainability. Shifted software design to configuration-based architecture, reducing client-specific code. Built product release pages and training resources for internal teams. Accelerated delivery, achieving results three times faster.

Team Lead / Software Developer at e-tab Tecnologia Gestão

July 1, 2019 - July 1, 2019

Led team modernizing notary systems using C#, SQL, WinForms, and DevExpress. Introduced Agile (Kanban) methodology and process standardization. Migrated source control from SVN to Azure DevOps (Git, tasks, and boards). Delivered secure integrations with Brazilian Judicial Power using REST. Automated version generation, reducing release time. Guided developers in C#, VB6, SQL, and Entity Framework projects.

Software Developer / Business Analyst at SKA Automação de Engenharia S/A

October 1, 2016 - October 1, 2016

Developed and integrated CAD and ERP systems to improve engineering workflows and data management. Integrated QC Electrical CAD with SAP DMS and Greendocs, streamlining document and design data exchange. Introduced Scrum methodology and TortoiseSVN, improving collaboration and delivery consistency. Built training programs and a knowledge base that accelerated onboarding and reduced support time. Provided on-site analysis and solutions for complex CAD integration challenges.

Software Developer / Business Analyst at SKA Automação de Engenharia S/A

November 1, 2011 - November 1, 2011

Developed ERP software modules and business integrations to support administrative, sales, financial, and engineering processes. Built Brazilian Electronic Service Bill (NFS-e) module using C#, ASP.NET, and SQL, ensuring compliance with municipal e-invoicing standards. Implemented Scrum methodology and TortoiseSVN, improving project delivery and code versioning. Designed and maintained SOAP-based web services to connect internal and external systems.

Software Developer (Intern -> Full-time) at Itaú Status Informática

May 1, 2011 - May 1, 2011

Built ERP software modules using VB, VB.NET, and SQL. Delivered new features and fixes in VB, VB.NET, and SQL. Provided advanced support and delivered software versions to clients.