Saulo Mendes
Senior Software Engineer | 20+ Years of Experience
Brazil
SUMMARY
Senior Software Engineer with 20+ years of experience, specializing in .NET for over 15 years.
Expert in distributed systems, cloud architectures, scalable APIs, and real-time processing. Strong
background leading modernization projects, reducing infrastructure costs, and improving system
performance through clean architecture, CI/CD automation, and cloud-native solutions.
SKILLS
• Backend: C#, .NET 6/7/8, ASP.NET Core, REST APIs, Clean Architecture
• Frontend: Angular, Vue.js, Blazor, Razor
• Mobile: .NET MAUI, Xamarin.Forms
• Cloud & DevOps: Azure DevOps, Azure Storage, Key Vault, CI/CD, Docker, Linux
• Messaging & Processing: RabbitMQ, Apache NiFi, Redis
• Databases: SQL Server, PostgreSQL, MongoDB, Firebird
• Testing: xUnit, Selenium
EXPERIENCE
Solvdus (German based company) — Senior Software Engineer (Dez 2025 - Present) - (Remote)
• Architected and led the development of a scalable Blazor Server application using .NET
• Owned key technical decisions involving system architecture, data security, and application
design
• Implemented secure strategies for sensitive data handling, including storage and access control
• Designed and integrated logging and observability solutions to enhance system reliability
• Led a full-scale data migration from SQL Server and MongoDB to PostgreSQL, ensuring high data
integrity and optimized performance
• Improved database efficiency through query optimization and schema redesign
• Developed and maintained unit tests to ensure code quality, reliability, and maintainability
• Implemented frontend testing strategies to validate UI behavior and user interactions
• Mentored developers and enforced best practices through code reviews and technical leadership
Worldpay — Fullstack .NET Software Engineer (Jun 2025 – Nov 2025) - Location: United States
(Remote)
• Led a large-scale legacy modernization initiative, migrating .NET Framework 4 applications to
new cloud-based infrastructure with zero downtime and improved reliability.
• Performed comprehensive exception analysis, diagnostics, and system validation to ensure
stability after migration.
• Authored detailed technical documentation covering migration strategy, deployment processes,
architecture mapping, and traffic-switch procedures.
• Executed multi-environment deployments using Octopus Deploy, improving release consistency
and traceability.
• Conducted Azure Portal monitoring, resource health checks, and proactive performance tuning.
• Collaborated with QA and engineering teams to validate deployment plans, coordinate testing,
and align multi-environment configurations.
• Collaborated with cross-functional teams to integrate new technologies into existing systems.
Vsoft Tecnologia — Tech Lead / Senior Software Engineer (2021–May 2025) - Location: Brazil
(Remote)
• Developed a .NET 8 API for real-time image and audio processing during driving exams,
supporting facial verification, in-car photo detection, and audio transcription; fully documented
with OpenAPI/Swagger.
• Designed a .NET 7 API integrating with DVR systems, enabling secure storage and retrieval of
monitoring footage for compliance and audit workflows.
• Built a Vue.js application connecting students and driving schools, using HTML, JavaScript, and
TypeScript to deliver a seamless user experience.
• Led the migration of an AI-powered mobile monitoring application, replacing a
WebView-based Xamarin Forms (Vue.js) implementation with a fully native Xamarin Forms and
.NET MAUI mobile app, enabling offline usage and improving scalability and maintainability
through Clean Architecture and DDD.
• Implemented facial recognition algorithms to improve identity verification accuracy and reduce
false negatives in mobile applications.
• Optimized system performance by reducing database load by 30% using Apache NiFi, RabbitMQ,
and Redis, cutting API traffic, latency, and infrastructure costs.
• Modernized a legacy Vue.js front-end by migrating it to .NET Blazor, improving performance by
30% and enhancing maintainability.
• Developed automated tests using xUnit, improving software reliability and code quality.
• Designed Azure DevOps CI/CD pipelines, including:
1.
2.
3.
4.
Multi-environment API deployments
Mobile app build and release flows
Containerized storage with Azure Blobs
Secure credential management via Azure Key Vault
• Git workflows (PRs, code reviews, task tracking).
• Led and mentored engineering teams, driving technical strategy, ensuring high-quality
deliveries, and fostering a collaborative environment.
Grupo Supero — Fullstack .NET Engineer -) - Location: Brazil (Remote)
• Designed, developed, and maintained sales-focused applications and REST APIs using .NET,
RabbitMQ, SQL Server, and Angular, delivering scalable and high-performance solutions that
improved business operations and system reliability.
• Created and enhanced API endpoints and microservices, supporting new product features, fixing
defects, and ensuring seamless integration across distributed systems.
• Built data normalization and bulk-processing tools, improving data accuracy, reducing manual
work, and streamlining critical business workflows.
• Implemented new features and resolved issues in a web application built with Angular,
improving user experience, performance, and front-end maintainability.
Ti9 Agência Digital — Full Stack Engineer (2019 - 2020) - Location: Brazil (Hybrid)
• Developed a web application for displaying medical on-call schedules for a hospital, using .NET
Blazor, REST APIs, and Microsoft SQL Server, improving visibility and coordination among medical
staff.
• Created a mobile learning-focused application using Xamarin.Forms, .NET REST APIs, and
RealmDatabase, along with a Blazor-based admin panel, enhancing content delivery,
maintainability, and user engagement.
W3 Iluminação — Fullstack .NET Engineer -) - Location: Brazil (Hybrid)
• Designed and developed a complete management platform for a public lighting company,
covering inventory/material control, operational workflows, and administrative processes,
significantly improving data accessibility and decision-making.
• Built a real-time mobile inspection app using Xamarin.Forms and RealmDatabase, enabling field
technicians to record faulty streetlights, update inventory usage, and synchronize operational data
instantly, reducing downtime and improving on-site efficiency.
• Developed a web-based management portal with Angular (later upgraded to Angular 9),
providing advanced operational, analytical, and statistical reporting for supervisors and field
teams.
• Designed and implemented .NET Framework 4.6 APIs and microservices, ensuring scalability,
modularity, and seamless integration with external systems and government energy providers.
• Utilized Microsoft SQL Server to deliver secure, reliable, and high-performance data
management, ensuring consistency, integrity, and optimized query execution.
• Achieved measurable operational improvements, including reduced material waste, increased
field productivity, improved communication with energy providers, and higher revenue and
customer satisfaction.
Odontocard — Software Engineer -) - Location: Brazil (Hybrid)
• Designed, developed, and supported a full ERP system for dental clinics used by Odontocard, a
healthcare plan provider, built with C#/.NET (WebForms and Razor), SQL Server, and REST APIs,
including integrations with Oracle for third-party healthcare systems. The platform featured
modules for patient management, scheduling, clinical workflows, finance, and inventory, with a
secure architecture designed to handle sensitive medical and patient data.
• Improved operational efficiency across clinic networks by enabling optimized billing workflows,
reducing material waste, and streamlining financial and administrative processes, while
maintaining compliance with healthcare data protection and privacy standards.
Ti9 Agência Digital — Software Engineer -) - Location: Brazil (Hybrid)
• Designed and developed a full-scale hospital ERP system from the ground up using Delphi,
Intraweb, and PostgreSQL, streamlining clinical and administrative operations and improving
overall patient care workflows.
• Delivered comprehensive modules covering diagnostics, patient registration and scheduling,
clinical records, laboratory exams, billing, and financial management, providing end-to-end
support for hospital operations.
• Implemented a web-based operational dashboard using Intraweb, enabling real-time visibility
into key performance indicators (KPIs), workload distribution, and resource utilization across
hospital departments.
• Designed, developed, and maintained a custom ERP system for sales and logistics using Delphi
and Firebird, significantly improving inventory control, sales tracking, financial reporting, and
operational visibility.
• Delivered industry-specific ERP extensions for auto parts retailers (electronic invoicing), freight
companies (electronic shipping manifests), and pest control services (service order automation).
• Provided long-term system maintenance and client support, including after-hours and weekend
assistance, ensuring reliability, customer satisfaction, and continuity of operations.
EDUCATION
Bachelor’s Degree in Systems Analysis and Development — Estácio de Sá University, Brazil
