Michael Dayvison Da Silva Mariano
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Michael Dayvison Da Silva Mariano

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Federal District, Brazil

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Jobs verified_user 0% verified
  • CIGNA Healthcare
    Senior Software Engineer
    CIGNA Healthcare
    Dec 2020 - Nov 2025 (5 years)
    Served as a Senior Software Engineer on large-scale healthcare technology platforms supporting digital member services, internal clinical tools, and pharmacy-related workflows used across multiple Cigna business units.Led the design and implementation of new features and service enhancements, developing backend solutions using JAVA, ASP.NET/.NET (C#) and modern frontend experiences using React.Took ownership of complex backend business logic and data flows, ensuring accuracy, consistency, and reliability across systems integrating with downstream healthcare and pharmacy services.Played a key role in technical design and architecture discussions, contributing to API contracts, data models, and integration strategies prior to implementation.D
  • CVS Health
    Senior Full Stack Engineer
    CVS Health
    Jul 2016 - Nov 2020 (4 years 5 months)
    Led development of enterprise healthcare platforms supporting member enrollment, claims processing, and care management, used by tens of thousands of internal users.Designed and delivered full stack solutions using JAVA, ASP.NET/.NET Framework & .NET Core (C#), Angular, and React in highly regulated healthcare environments.Architected and optimized RESTful APIs (JSON/XML) supporting complex business logic, improving response times and reducing downstream service errors.Built responsive, accessible SPAs with Angular and React, improving usability and productivity for care coordinators, analysts, and operations teams.Drove production issue resolution and root-cause analysis, reducing recurring incidents and improving platform stability and up
  • Elevance
    Full Stack Developer
    Elevance
    Jan 2013 - Jul 2016 (3 years 7 months)
    Worked as a Full Stack Developer on internal healthcare applications supporting hospital administration, reporting, and operational systems used by facility and clinical staff.Developed and maintained frontend single-page applications using Angular, React, and Vue, implementing responsive, form-driven interfaces based on UI/UX specifications.Built and enhanced backend services and APIs using Java, ASP.NET / .NET Framework and .NET Core (C#) to support data entry, validation, and internal workflows.Designed, implemented, and maintained RESTful Web APIs using ASP.NET Web API, delivering and consuming data in JSON/XML formats.Worked extensively with HTML, CSS, and JavaScript to ensure cross-browser compatibility and consistent behavior across
Education verified_user 0% verified
  • Texas Tech University
    Bachelor of Science, Computer Science
    Texas Tech University
    Jan 2008 - Jan 2012 (4 years 1 month)