William B. Dos Santos
Verified Expert in Engineering
C# Developer
São Paulo - State of São Paulo, Brazil
Toptal member since February 21, 2024
William has over 17 years of professional experience in diversified roles. He has contributed to projects that generated million-dollar revenues, showcasing a keen strategic sense. He has experience fixing bugs and working with various technologies, including .NET. With experience optimizing system processes' performance and achieving improvements of up to 60-fold in operational efficiency through troubleshooting and strategic enhancements, William is looking forward to his next challenge!
Portfolio
Experience
- Back-end - 17 years
- SQL - 17 years
- Complex Problem Solving - 17 years
- Databases - 17 years
- C# - 17 years
- Projects - 15 years
- APIs - 12 years
- Git - 10 years
Availability
Preferred Environment
C#, Complex Problem Solving, Agile, Code Review, SQL, Redis, Object-relational Mapping (ORM), Version Control, Git, Projects
The most amazing...
...project I've contributed to is for F1RST Technology, where I worked on integrations with 3rd-party systems, streamlining inter-system communication.
Work Experience
Senior Software Engineer
F1RST Technology
- Played a pivotal role in projects that delivered multi-million-dollar profits.
- Propelled process efficiency over 10 times, increasing two transactions per second (TPS) to 20.
- Provided technical mentorship to junior team members, fostering skill development and team cohesion.
- Collaborated and integrated with 3rd-party systems, streamlining inter-system communication.
Senior Software Engineer
Qintess
- Started working on a big project and played a pivotal role in projects that delivered multi-million-dollar profits.
- Joined the company after the project's successful implementation.
- Propelled process efficiency over 10 times, showing an unwavering commitment to operational excellence.
- Communicated and integrated with 3rd-party systems, streamlining inter-system communication.
Senior Software Engineer
Inetx
- Pioneered and delivered a project in the financial sector. Managed end-to-end implementation, including business logic, front end, back end, databases, and authentication and authorization systems.
- Created an advanced reporting system that offers multidimensional insights, elevating operational transparency and decision-making processes.
- Managed testing processes and seamlessly integrated communication with 3rd-party tools to ensure project robustness.
- Offered my expertise to Sinqia, where I tackled challenges within their internet banking for individuals and Software Business Systems (SBS), actively contributing to resolving complex issues.
Senior Software Engineer
Grupo SHC
- Contributed to system projects for vehicle delivery, including supervising purchases, sales, and workshop processes.
- Evolved a comprehensive project and excelled in back-end processes, improving the data flow.
- Simplified data exchange with SAP, including visualization and help in advanced business application programming (ABAP) code.
- Developed simple-to-use front-end pages and improved reporting features for better decisions.
- Updated the market information capture system, improving reports.
- Adopted innovative technology stacks for adaptable report formatting, including AngularJS and MongoDB.
Senior Software Developer
Valor Econômico
- Engaged deeply in C# back-end processes within the ValorPro system.
- Managed the capturing, processing, and storage of millions of data points in databases from various global stock exchanges.
- Used the Advanced Message Queuing Protocol (AMQP) Protocol to ensure seamless system integration.
- Employed C++ with the Financial Information eXchange (FIX) protocol for retrieving and processing data from many international stock exchanges.
- Created and supplied ongoing support for a robust CI/CD system using Team Foundation Server (TFS) Build and TFS Release Management.
Senior Software Developer
Grupo SHC
- Played a key role in the inception of the vehicle delivery system project, overseeing purchase, sale, and workshop processes.
- Created and evolved a comprehensive project and excelled in back-end processes, improving the data flow.
- Simplified data exchange with SAP, including visualization and help in ABAP code.
- Developed simple-to-use front-end pages and improved reporting features for better decisions.
Software Developer
Spring Wireless
- Fixed reported bugs in mobile, web, desktop, and business intelligence projects for customers in Brazil, Europe, and Central and South America.
- Enhanced the system process performance by 10 times.
- Corrected bugs and optimized the system for mobile devices using Java.
Software Developer
7COMm
- Acted as the developer and provided support in the Cisfarma project, working with web, desktop, and mobile.
- Created reports using ASP and ASP.NET technologies.
- Built Component Object Model+ (COM+) components with Visual Basic 6 to process transmitted file contents.
Experience
Valor PRO
https://valorpro.globo.com/#/With behind-the-scenes market news, analytical tools, and complete information about finance and business, Valor PRO is a real-time information service, which is an idle speed through the market to the replacement of Valor Econômico.
Education
Postgraduate Degree in Distributed Software Architecture and Information Technology
Pontifical Catholic University of Minas Gerais - Belo Horizonte, Minas Gerais, Brazil
Bachelor's Degree in Systems Analysis and Information Technology
Fatec Ourinhos - Ourinhos, São Paulo, Brazil
Certifications
Oracle Cloud Infrastructure 2023 Certified Foundations Associate
Oracle
AWS Certified Cloud Practitioner
Amazon Web Services
Microsoft Certified: Azure Fundamentals
Microsoft
Skills
Libraries/APIs
Node.js, Infragistics
Tools
Git
Languages
C#, SQL, Java, TypeScript, JavaScript, C, C++, Visual Basic 6 (VB6)
Paradigms
Agile, Object-relational Mapping (ORM), DevSecOps, MVC Design, COM+
Storage
Databases, Redis, SQL Server 2016, Oracle Cloud, PL/SQL, Microsoft SQL Server, MongoDB, Web Forms, SQL Server Analysis Services (SSAS), SQL Server Reporting Services (SSRS)
Frameworks
.NET, NHibernate, ASP.NET Web Forms
Platforms
Azure, Amazon Web Services (AWS)
Other
Complex Problem Solving, Version Control, Projects, Back-end, APIs, Computer Science, Analysis, Code Review, Front-end, Cloud, Networks, Financial Markets, SAP, CI/CD Pipelines, FIX Protocol, SAP Integration
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