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Rafael Viegas De Carvalho

Rafael Viegas De Carvalho

IT Consultant

location of Rafael Viegas De CarvalhoSão Paulo, São Paulo, Brazil

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  • Timeline

  • About me

    Senior Technical Specialist @ Sidia | MBA, 5G Expert, Telecom, AWS, Data Science, Analytics, AI, ML, Software Engineering, Github, Perforce

  • Education

    • Fachhochschule Schmalkalden

      2009 - 2009
      Bachelor of Engineering - BE Electrical and Electronics Engineering Classes taken both in English and German (Exchange Student Program)

    • MBA USP/Esalq

      2021 - 2022
      Master of Business Administration - MBA Data Science and Analytics 10

      Atividades desenvolvidas:Compreender as diferentes estruturas de bancos de dados, tipos de variáveis e suas escalas de mensuraçãoRelacionar engenharia de dados, analytics e machine learningDesenvolver habilidades para a manipulação de dados, data wrangling e data visualizationEntender as razões para a estimação de cada um dos modelos de machine learningConstruir algoritmos para desenvolvimento de modelos e implementação de técnicas de machine learning unsupervised… Show more Atividades desenvolvidas:Compreender as diferentes estruturas de bancos de dados, tipos de variáveis e suas escalas de mensuraçãoRelacionar engenharia de dados, analytics e machine learningDesenvolver habilidades para a manipulação de dados, data wrangling e data visualizationEntender as razões para a estimação de cada um dos modelos de machine learningConstruir algoritmos para desenvolvimento de modelos e implementação de técnicas de machine learning unsupervised, supervised e ensembleCompreender e utilizar dados para análise geoespacialDesenvolver projetos de business intelligence e data visualization, bem como construir dashboardsImplementar técnicas de pesquisa operacional a partir de modelos de otimização e simulaçãoApresentar visão crítica e estratégica sobre projetos de tecnologia da informação, inteligência artificial, big data e data miningEstabelecer estratégias de analytics para modelos de decisão e risk management Show less

    • Universidade Federal de Minas Gerais

      2006 - 2011
      Bachelor of Engineering - BE Electrical Engineering 4/5

      Activities and Societies: Comissão de Formatura - 2o Semestre de 2011 Emphasis in Telecommunications.

  • Experience

    • Consultoria e Projetos Elétricos Júnior

      Mar 2008 - Mar 2009
      IT Consultant

      Development of Excel Macros for general purposes.Computer hardware support (change of motherboard, RAM, HDD and other components).Installation of Operating System (UNIX, LINUX, Windows, OSX)Troubleshooting of university proprietary tools, like webserver and mailserver.

    • Oi/Telemar

      Mar 2010 - Sept 2010
      Intern in IT

      Managing of Microsoft platform Sharepoint (upload of documents, troubleshooting of administration issues, user permission).Development of Excel Macros for general purposes.Responsible for IT support activities, with tight SLA.

    • RemOpt

      Oct 2010 - Mar 2013

      Parameter Audit for 3G networks (check if parameter is configure as planned value and following the market strategy)Perform parameter changes in RNC Level.Optimized Features testing and implementingPlanning of physical adjustments (Change of Azimuth, electrical and mechanical tilt)Planning drive route for drive testing and results analysis (Drop call, SWAP sector, Overlap, Coverage RSCP, EcIo, RSRP, RSRQ, SINR) Analyze Drive test KPI reports to improve system performance. (dropped calls, blocked calls, origination failures, hand-off features etc)Parameter Audit for 3G networks (check if parameter is configure as planned value and following the market strategy)

      • Wireless RF Engineer at TIM Brasil

        Jan 2012 - Mar 2013

      • Optimization Engineer

        Oct 2010 - Dec 2011

    • CelPlan Technologies

      Apr 2013 - Apr 2014
      Wireless RF Engineer at TIM Brasil

      Parameter Audit for 3G and 4G networks (check if parameter is configure as planned value and following the market strategy)Perform parameter changes in RNC Level.Optimized Features testing and implementingPlanning of physical adjustments (Change of Azimuth, electrical and mechanical tilt)Planning drive route for drive testing and results analysis (Drop call, SWAP sector, Overlap, Coverage RSCP, EcIo, RSRP, RSRQ, SINR)

    • TIM Brasil

      May 2014 - Dec 2020

      Technical Specifications for Radio Access Networks (2G/3G/4G)RAN Sharing Solutions - Support & Troubleshoot & SpecificationQoS DesignSmartphones, tablets and SIM Specification & Penetration & New Technology Assessment (LTE-A, NFC, M2M, NB-IoT, LTE-M)UMTS e LTE Features ImplementationRadio Access & Solution Validation at Laboratory (PVV - Huawei/Ericsson/Nokia)Transport (IP + Optical) Solution Validation at Laboratory (PVV - Huawei/Cisco/Fiberhome) Capacity Planning for Radio Access Networks (3G/4G)Coverage PredictionRevenue Increased based on Network AnalysisNetwork Growth ForecastTechnical support for Radio Access Team (Engineering, Optimization, Innovation)

      • Technology Expert

        Jun 2015 - Dec 2020

      • Access Planning Expert

        May 2014 - Jun 2015

    • Sidia Instituto de Ciência e Tecnologia

      Dec 2020 - now

      Technical Leadership: Spearheaded a team of 7 engineers in the development and implementation of over 100 innovative features on Samsung devices across LATAM carriers, ensuring high standards of excellence and efficiency.5G and IMS Innovation: Led the coordination of advanced trials for cutting-edge technologies, including 5G NSA/SA, eSIM, M-MIMO, mmWave, Private Networks, Network Slicing, and IMS services (VoLTE/ViLTE/VoNR/ViNR), driving the forefront of mobile connectivity advancements.Software Engineering and Code Management: Engineered robust software solutions, managed critical code changes, conducted thorough code reviews, and implemented best practices for version control using GitHub and Perforce (P4). Code development focused on device’s connection to GSM/UMTS/LTE/NR networks and IMS Framework, following specifications of 3GPP/GSMA and other standardization bodies. Expertise in branch management and code integration ensuring the delivery of high-quality, over than 50 functional products.Advanced Troubleshooting: Specialized in diagnosing and resolving issues across key layers (NAS/SDAP/PDCP/RRC/MAC/PHY), leveraging state-of-the-art log analysis tools from Qualcomm, Samsung, and Mediatek and Android RILJ, RILD and Vendor RIL Layers. Analyzed over 400 logs, optimizing device performance and ensuring compliance with international technical standards.Talent Development and Training: Designed and delivered more than 50 workshops and webinars, sharing practical and theoretical knowledge with colleagues and clients, significantly contributing to team technical growth and project success Show less • “Automation, Requirements and Trials” Leader, in Protocol-TG structure, coordinating 9 engineers. Main activities include: Coordination and execution of new features trials (5G NSA/SA, eSIM, M-MIMO, mmWave) on Samsung devices across LATAM; Development of automation processes; implementation of LATAM carrier’s requirements on SAMSUNG devices (ca. 30 MNO’s)• Code development and test for android, focusing on device’s connection to GSM/UMTS/LTE/NR networks, supporting implementation of protocol procedures, according to 3GPP technical standards• Troubleshooting Net Log Analysis at NAS/SDAP/PDCP/RRC/MAC/PHY Layers using chipset vendor tools (QXDM, Shannon, ELT) as well as publicly available tools (Android Dumpstat and Wireshark)• Workshop and Webinar development, gatherings and sharing practical and theoretical knowledge to 100 colleagues and clients Show less

      • Senior Technical Specialist

        Aug 2022 - now

      • Technical Specialist

        Dec 2020 - Aug 2022

  • Licenses & Certifications