Computer Security Consultants For Hire
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Sponsored Freelancers
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Senior Systems & Security Engineer with 15+ years in enterprise-grade IT. I design, harden, and operate high-availability infrastructure, and I streamline delivery with automation and clean processes. My focus: reliability, security, and clear documentation—so changes are low-risk and handovers are...Senior Systems & Security Engineer with 15+ years in enterprise-grade IT. I design, harden, and operate high-availability infrastructure, and I streamline delivery with automation and clean processes. My focus: reliability, security, and clear documentation—so changes are low-risk and handovers are effortless. Strengths: Infrastructure architecture & operations (Linux/Windows, virtualization, networking) Security hardening, identity & access, monitoring/observability Automation & DevOps practices (CI/CD, config management, IaC) Migrations and upgrades with minimal downtime Concise runbooks, risk-aware planning, and stakeholder-friendly communication Certifications: CompTIA Security+, Microsoft MCSE/MCSA/MCITP Languages: English (C2), German (C1), native Romanian Location: Germany • NDA-friendly • Reliable and responsive less
Hire iosifpeterfi
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ZAWN Tech is a trusted software company founded in 2014, delivering complete digital solutions for startups and enterprises worldwide. Our certified developers combine deep technical knowledge with real-world project experience to build fast, secure, and scalable systems. Core Expertise Blockchain: Metaverse, Web3,...ZAWN Tech is a trusted software company founded in 2014, delivering complete digital solutions for startups and enterprises worldwide. Our certified developers combine deep technical knowledge with real-world project experience to build fast, secure, and scalable systems. Core Expertise Blockchain: Metaverse, Web3, NFTs, NFT Games, Smart Contracts, Arbitrage & Sniper Bots, DEX / DApp Development (Ethereum, BSC, Polygon, Solana, WAX). Web & SaaS Development: Full-stack using React, Node.js, Laravel, Django, and Next.js. Integration with Odoo, Bubble.io, Zoho, and Webflow. eCommerce: Shopify, WooCommerce, Magento, and custom marketplace platforms with payment, shipping, and ERP integrations. Mobile Apps: Native and cross-platform (Flutter, React Native, Android, iOS). AI & Computer Vision: Chatbots, GPT integrations, TensorFlow, OpenCV, and OCR systems. Game Development: Unity 3D, Unreal, and WebGL with multiplayer, blockchain, and AR/VR support. Trading & Financial Automation: MT4/5, TradingView, Binance, Interactive Brokers, and algorithmic trading bots. Hardware & IoT: Arduino, Raspberry Pi, ESP32, MATLAB, embedded control, and automation projects. With 200+ recommendations and over a decade of experience, we turn complex ideas into reliable, production-ready solutions — delivered with clear communication and long-term support. less
Hire AwaisChaudhry
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engkarimismail engkarimismail
$50 USD / hour
✅ Senior Network & System Engineer | Security|VOIPMalaysia✅ About Me I am an experienced IT professional with expertise in server administration, networking, virtualization, and security. My skill set spans managing server operating systems, configuring directory services, implementing DNS/DHCP solutions, and deploying virtualization platforms. I have a strong background in...✅ About Me I am an experienced IT professional with expertise in server administration, networking, virtualization, and security. My skill set spans managing server operating systems, configuring directory services, implementing DNS/DHCP solutions, and deploying virtualization platforms. I have a strong background in firewalls, scripting, containerization, and database management. Additionally, I specialize in mail servers, backup systems, and cloud technologies. With advanced networking skills, including Cisco routing, VLAN management, VoIP/IP telephony, and penetration testing, I am well-equipped to handle complex IT infrastructures. I am dedicated to delivering reliable solutions, ensuring data integrity, and enhancing system performance. ✅Send me now 24/7 Availability Unlimited Revisions Fast Response ✅ Server Operating Systems Windows Server (2003 to 2024) | Ubuntu | CentOS | Debian | RHEL ✅ Directory Services Active Directory | OpenLDAP ✅ DNS and DHCP Windows Server DNS | DHCP | Linux DNS | DHCP ✅ Virtualization Microsoft Hyper-V | VMware ESXi | vCenter | Proxmox VE ✅ File Servers IIS FTP | proftpd | FileZilla | FTP Server | Samba ✅ Web Servers Apache | NGINX | Microsoft IIS ✅ Scripting and Automation PowerShell scripting | Bash scripting ✅ Containers Docker | Windows Subsystem for Linux (WSL) ✅ Backup Systems Veeam Backup | Iperius Backup | UrBackup ✅ Mail Servers Mailcow | Microsoft Exchange (2000–2019) | MailWizz | Postfix | EXIM ✅ Database Servers MySQL | PostgreSQL | MariaDB ✅ Firewalls and Security MikroTik | PFSense | Cisco Firewalls ✅ Networking Skills Cisco Routing and Switching | VLANS | OSPF | VoIP and IP Telephony | Network Penetration Testing Access Control Lists (ACLs) Security (MITM Attack Mitigation) ✅ Recovery Services Password recovery for accounts and routers | Disaster recovery planning ✅ VOIP Service Freepbx | freeswitch | CME | IP TELEPHONY | 3CX SYSTEMS ✅ Cloud Service AWS, DigitalOcean, Hetzner, Azure, Google Cloud Platform, IBM Cloud, Oracle Cloud, Alibaba Cloud, Contabo, Seva less
Hire engkarimismail
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Software Engineer | Cybersecurity Specialist | Network Security Engineer | Embedded Systems Developer | Medical Coder I am a versatile professional with a degree in Software Engineering and Information Systems and over 5 years of experience in software development, embedded systems, cybersecurity, network security,...Software Engineer | Cybersecurity Specialist | Network Security Engineer | Embedded Systems Developer | Medical Coder I am a versatile professional with a degree in Software Engineering and Information Systems and over 5 years of experience in software development, embedded systems, cybersecurity, network security, and medical coding. With a strong academic background and hands-on expertise, I deliver high-quality solutions across various domains. Services Offered : ✔ Software Development Full-stack web development Desktop applications API integrations and automation scripts ✔ Embedded Systems Design Development of IoT systems Hardware-software integration Microcontroller programming ✔ Cybersecurity Solutions Threat analysis Vulnerability assessments Penetration testing Security architecture design ✔ Network Security Network configuration Troubleshooting and optimization using Cisco technologies ✔ Medical Coding Accurate ICD-10 medical coding Compliance audits for healthcare organizations ✔ Technical Writing Deliverables : Custom software applications Embedded IoT solutions Secure and optimized network architectures Comprehensive cybersecurity audit reports Accurate and compliant medical coding records Training modules and documentation Technical Proficiencies : ✔ Programming Languages: Python, Java, C#, JavaScript, C, C++ ✔ Embedded Systems Tools: Arduino IDE, PlatformIO, Keil uVision, Microchip MPLAB X ✔ Microcontrollers: Arduino, ESP8266/ESP32, STM32, Raspberry Pi ✔ IoT Protocols: MQTT, HTTP, WebSocket, Zigbee ✔ Tools & Technologies: Docker, Git, Jenkins, SQL, MySQL, Wireshark ✔ Cybersecurity Frameworks: NIST, ISO 27001, OWASP ✔ Networking Tools: Cisco Packet Tracer, GNS3 ✔ Medical Coding Software: 3M CodeFinder, TruCode Encoder Language & Communication : I am highly proficient in English, Arabic with excellent written and verbal communication skills. I excel at delivering clear and concise documentation, ensuring seamless collaboration, and tailoring solutions to meet client needs. ? Let’s work together to bring your projects to life! ? less
Hire noursherif030
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I’m Brayan Arias — known by my clients as ⭐ The Coding Machine ⭐. I’m a Senior .NET Developer from Colombia with 10+ years of experience building powerful, scalable, and intelligent software solutions. My expertise spans the Microsoft ecosystem — from .NET (WPF, MAUI, Blazor, ASP.NET Core) to Azure cloud...I’m Brayan Arias — known by my clients as ⭐ The Coding Machine ⭐. I’m a Senior .NET Developer from Colombia with 10+ years of experience building powerful, scalable, and intelligent software solutions. My expertise spans the Microsoft ecosystem — from .NET (WPF, MAUI, Blazor, ASP.NET Core) to Azure cloud integration, AI-powered applications, and system-to-system integrations that help businesses automate, optimize, and grow. I pride myself on clear communication, clean architecture, and delivering solutions that delight clients and make a measurable impact. Whether you need to modernize a legacy app, integrate Azure services, or leverage AI to enhance productivity, I’m ready to bring your vision to life. Let’s build something amazing together — reliable, intelligent, and designed to impress. less
Hire brayanstiven5
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abusayed2004 abusayed2004
$50 USD / hour
Ai Voice Agent, Asterisk PBX, SIP, Linux, SecurityBangladeshI am currently seeking long-term remote and on-site job opportunities. With 15 years of experience, I have worked extensively with VoIP, Asterisk, cloud technologies such as AWS and OpenStack, Server security, Vtiger CRM, Open VPN, CentOS, Ubuntu, Redhat, VoIPSwitch, Oracle DB, RHEVM, MySQL, and Linux customisation. I...I am currently seeking long-term remote and on-site job opportunities. With 15 years of experience, I have worked extensively with VoIP, Asterisk, cloud technologies such as AWS and OpenStack, Server security, Vtiger CRM, Open VPN, CentOS, Ubuntu, Redhat, VoIPSwitch, Oracle DB, RHEVM, MySQL, and Linux customisation. I am also proficient in Python and PHP scriptwriting for IVR and AGI implementation on Asterisk. I have a team for support and further development. My expertise includes: - Ai Voice Agent build and operations multi tenant platform. - Linux - Hosting Systems Administration & Monitoring - Kubernaties, IoT tech stack - Design and implementation of High-Performance SIP SBC - DevOps CI/CD - Service Optimisation - Security Hardening - VoIP, Asterisk, SMS, Dongle, and FreePBX installation, configuration, and maintenance - WebRTC SIP Phone - Infrastructure Planning - Disaster Recovery - Shell Scripting - Capacity planning, application delivery planning - Network Troubleshoot, Spanning Tree, PVST, RSTP, HSRP, RIP, BGP, EGRP, IGRP, MPLS - SAN Troubleshoot - GlusterFS, CEPH - NFS, SMB, ISCSI, SMTP - Linux performance tuning - MySQL, Oracle DB performance tuning - Laravel web application development - Web Security, Web benchmark, best practice - IPTV, Live streaming, VOD, FFmpeg - Raspberry Pi Please let me know if you have any questions or require further information. less
Hire abusayed2004
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✅ MS (Computer Networks) ✅ BS (Computer Sciences) ✅ CCNA & CCNP Academy Certified ---------------------------------------------------------------------------------------------------- ✅ NAS Systems Setup and Configurations (Synology, UGreen, QNAP) ✅ Email Deliverability (SPF/DKIM/DMARC) ✅ DNS Setup and Troubleshooting...✅ MS (Computer Networks) ✅ BS (Computer Sciences) ✅ CCNA & CCNP Academy Certified ---------------------------------------------------------------------------------------------------- ✅ NAS Systems Setup and Configurations (Synology, UGreen, QNAP) ✅ Email Deliverability (SPF/DKIM/DMARC) ✅ DNS Setup and Troubleshooting for Email Authentications ✅ Linux/Windows Servers Administration ✅ Cloud Computing (AWS,GCP, MS Azure, DigitalOcean) Administration ✅ MAC OSX ✅ Git ✅ Docker ✅ Cisco Routers/Switches ✅ VMware ESXi, VSphere Client, VConverter, VCenter ✅ VMware Server/Workstation, VirtualBox, OpenVZ, XEN, HyperVM, Citrix XEN ✅ Control Panels: WHM/Cpanel, Plesk, CyberPanel, CloudPanel, Vesta, ISPConfig, Virtualmin/Webmin ✅ MTA & MUA: Postfix, Sendmail, Zimbra, Horde, RoundCube, Exim ✅ DNS Management ✅ Apache / Nginx / LiteSpeed ✅ MSSQL/MySQL/MongoDB/MariaDB ✅ Server Based Security: IP tables, CSF/APF ✅ Cisco VPN, Cisco Firewall, Wireless Router ✅ Windows Server 2008/2012/2019/2022/2025, Windows 10/11 ✅ IIS 7/8/10 & MS Exchange Server, MS365, Google WorkSpace ✅ Removal of (Malware's/Viruses) from Websites less
Hire tech717
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I am computer engineer and certified LabVIEW architect CLA and Embedded LabVIEW developer CLED and Teststand and Diadem developer and Certified Teststand Developer CTD with big experience in Test and Automation projects using NI Hardwear including NI Crio , NI Cdaq ,NI PXI , sbrio and usb series and other vendor...I am computer engineer and certified LabVIEW architect CLA and Embedded LabVIEW developer CLED and Teststand and Diadem developer and Certified Teststand Developer CTD with big experience in Test and Automation projects using NI Hardwear including NI Crio , NI Cdaq ,NI PXI , sbrio and usb series and other vendor hardware controllers and PLC and i worked with many industrial communications protocols like IEC 61850, CAN , ETC.. with MSc degree in cryptography and SAT Math expert tutor . So i can help you manage your work with less prices , i do not care about money but i care about the quality of work , , i can design diagrams using UML , i can speak multi languages , ENGLISH , GERMAN AND ARABIC Thanks less
Hire ahmed4499
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Hi there, I am networking expert specialist and consultant for more than 8 years, who spend my free time to learn about new technologies in networking, security field to be always up to date. please just ping me on chat to have a short discussion on your project and i will always look for solving your tasks...Hi there, I am networking expert specialist and consultant for more than 8 years, who spend my free time to learn about new technologies in networking, security field to be always up to date. please just ping me on chat to have a short discussion on your project and i will always look for solving your tasks quickly. below is a brief on my experience: Technology Specialist: --------------------- - Can design, implment large scale networking and make exaplanation reports. - Practice on Cisco Packet Tracer, GNS-3, EVE-NG. - Excellent pracitce on VMware WorkStation, Virtual-Box - VPN (IPSEC,IKE v1 or v2 ,L2TP ,OPENVPN, DUO Authentication). - Routing Protocols (BGP, OSPF, EIGRP .. ). - Wrie Technical Reports with excellent and format. Skills and Hands on Experience: ------------------------------- - Cisco devices (routers, switches), routing protocols, IPSEC, Cisco ASA Firewall. - Fortinet Devices: FortiGate, Forti Manager, Forti Analyzer. - wireless (WLC, Access Points): CISCO, Aruba, ubiquiti. - Juniper (M7, M10, MX 480, MX 960) and SRX (300, 500). - Operating Systems: Linux servers (Ubuntu, RedHAT, Debian), windows (Windows server 2012, 2016 ..etc). Regards, Ramy less
Hire ramygoda1590
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About me I have worked over 20 years at IT and telecom companies in the following positions: IT support, system administrator, applications administrator, and monitoring administrator expert. I am "System Administration and IT Infrastructure Services" certified I follow KISS methods. I understand the OSI layer. With...About me I have worked over 20 years at IT and telecom companies in the following positions: IT support, system administrator, applications administrator, and monitoring administrator expert. I am "System Administration and IT Infrastructure Services" certified I follow KISS methods. I understand the OSI layer. With me, it is easy to set up systems. I am not picky about what systems to use, but I do have experience with what to use. I know the following operating systems + distros: Debian, Ubuntu, Gentoo, SUSE, Red Hat, CentOS, Rocky Linux, AlmaLinux, Arch Linux, FreeBSD, NetBSD, OpenBSD, Sun Solaris, plus MS Windows servers I also know the following systems: * Web servers: Apache, Nginx, Lighttpd, Litespeed, Hiawatha. * Java web servers: Tomcat, Jrun, JBoss * Javascript: Node.js, npm * Proxy systems: Haproxy, Varnish, Squid. DB servers: MySQL (and forks, including MariaDB), PostgreSQL * Mail systems: Postfix, Exim, Dovecot, and implementing DKIM, SPF, MX, and DMARC * Monitoring systems: Nagios, Zabbix, Cacti, Grafana * SMS: SMSC, Kannel * DNS: Bind, Djbdns, Dnsmasq. * VPS: VMware, Hyper-V, Proxmox, bhyve, KVM, Xen, OpenStack... * Containers: Docker, Podman, LXC, jail, Kubernetes * High Computing: OpenHPC, SLURM, MPI, and related * Cloud providers: AWS, DigitalOcean, Azure… I troubleshoot easily My knowledge does not stop here. Let's chat Please see my reviews of my previous works PS! As bonus, with my bid, you will get one week of free support for work done less
Hire servermaster
