Rafael Viegas De Carvalho Email & Phone Number

São Paulo, Brazil

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

São Paulo, Brazil

• “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

Rio De Janeiro Area, Brazil

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)

Rio De Janeiro Area, Brazil

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)

Rio De Janeiro Area, Brazil

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)

Rio De Janeiro Area, Brazil

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)

Belo Horizonte Area, Brazil

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)

Belo Horizonte Area, Brazil

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.

Belo Horizonte Area, Brazil

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.

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 mensuração.

Bachelor Of Engineering - Be, Electrical Engineering, 4/5

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

Bachelor Of Engineering - Be, Electrical And Electronics Engineering, Classes Taken Both In English And German (Exchange Student Program)