Vinicius Kammer

Cyber Security Analyst

Human Security, Sigma Software

Mar 2025 - Current (1 year 8 months)

Provide support on questions and requests from B2B customers and end users for the API product for Bot Defender. Assuring high CSAT survey score and over 92% SLA compliance on first response and on subsequent updates based on priority. Continuously providing updates and feedback on the traffic and monitoring the detections effectiveness.
Investigated past and ongoing hacker attacks using Kibana (SIEM-Like) and the technical documentation to deal with attacks such as account takeover, carding attempts and credential spoofing, based on request parameters in order to identify the attack origin and developed solutions to block malicious traffic on customers as fast as possible, contributing to diminish IAM threats, mitigating customers' di

Support and Maintenance Technician II

T-Systems do Brasil

Nov 2024 - Mar 2025 (5 months)

Provided second-level support for two separate systems: the API and the main system.
Delivered complete support for the API, including file revisions, resolving customer questions and requests, and ensuring correct functionality.
Monitored and assisted with changes to the main system, which defined global vehicle request rules, ensuring alignment with API operations.
Helped maintain seamless integration between both systems to ensure smooth data flow and accurate order processing.
Delivered customer assistance, consistently meeting SLA targets and ensuring satisfaction.
Utilized ServiceNow, Jira, Grafana, Kibana, Jaeger, MQ Admin.

Support and Maintenance Technician I

T-Systems do Brasil

Feb 2023 - Oct 2024 (1 year 9 months)

Managed tickets through multiple platforms, including ServiceNow, Jira, and BMC Remedy ITSM
Provided customer support via email and phone, primarily in English assuring customer satisfaction.
Implemented process improvements for better internal workflows and enhanced customer satisfaction with Service Level Agreement over 95%.
Edited existing macros (Visual Basics for Applications) and formulas in Excel reports to fix misleading or outdated information.
Applied agile methods in the team’s daily process to avoid SLA breaches and assure quality.
Utilized ServiceNow, Jira, and BMC Remedy ITSM

M

Full Stack Developer

Marvee

Sep 2022 - Jan 2023 (5 months)

Worked as a full-stack developer using JavaScript and TypeScript with Node.js for the back-end and React.js for the front-end.
Handled API integrations and developed the invoicing module working with third-party teams to assure code quality.
Applied technical expertise and business knowledge to develop features and support the team in understanding project requirements
Guided new developers through the code and served as intermediary between third party developers and the developer team.
Provided support for internal users and aided in the creation of the tech support process for the company.
Took care of maintenance of two legacy softwares on .NET framework, using C# as programming language.
Utilized JavaScrip

Software Developer

Celcoin

Feb 2022 - Jul 2022 (6 months)

Collaborated with the third-level support team to provide API usage solutions, maintain systems built in C# with the ASP.NET Core framework, and monitor system logs.
Developed routine scripts for Microsoft SQL Server and tested APIs using Postman.
Managed the tickets opened by first level on Helpdesk and provided the ticket solution via Helpdesk email system.
Provided support to users on platform access, performed access reviews and kept maintenance for the login endpoint.
Revised and improved the documentation process with the team with the Swagger tool.
Utilized C#,

M

Full-stack Developer

M.Victor Consultoria e Gestão Empresarial

Apr 2021 - Dec 2021 (9 months)

Developed and maintained multiple systems using various technologies, focusing on creating a financial system and an internal HR and task management tool, both built on ASP.NET Core with C#, HTML, CSS, JavaScript, and Microsoft SQL Server.
Created and maintained over 15 dashboards using Microsoft Power BI and Microsoft SQL Server along with Power Query.
Served as a Systems Analyst, responsible for drafting an MVP for an ERP system, conducting requirements analysis, designing the data model (ERD), and guiding team members during the initial project stages.
Designed the basis for the platform role-based access control, defining roles, permis

Support and Maintenance Technician I - EDI Project

T-Systems do Brasil

Oct 2019 - Mar 2021 (1 year 6 months)

Monitored clients' EDI connection systems and handled ticketing in English and German
Solved issues via phone and email, processed files with system errors, and managed connection queues (AS2, FTP, SFTP, OFTP, and EDI Web Service)
Performed daily connection checks for all systems
Managed webEDI users, being responsible to create, delete and support users on platform, including password resets and write, read and delete permission.
Utilized Apache SFTP, PuTTY, Kibana, Odette OFTP2, for customer management, AS2 and WebEDI we used tools created on demand for the project.

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Vinicius Kammer

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