Computer Security Consultants para contratar
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Freelancers patrocinados
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Top 1% Freelancer with 8+ years of experience as a Computer Scientist , Full-Stack Engineer and Cloud/Cybersecurity Architect. I deliver end-to-end solutions for high-stakes business problems, from concept to production-ready deployment for global clients. My expertise is not just in one domain : I architect and build...Top 1% Freelancer with 8+ years of experience as a Computer Scientist , Full-Stack Engineer and Cloud/Cybersecurity Architect. I deliver end-to-end solutions for high-stakes business problems, from concept to production-ready deployment for global clients. My expertise is not just in one domain : I architect and build the entire system , the secure infrastructure, the scalable backend, and the polished frontend , ensuring a resilient and high-performance result. Core Competencies & Verifiable Experience: ► Full Stack Product Delivery: I have a proven record of shipping complex applications from scratch. My portfolio includes 5+ live apps, demonstrating expertise in: Complex Business Systems: Architected and built the 70+ page front-end for erpflow.vercel.app (HR, Payroll, CRM). HIPAA-Compliant HealthTech: Built the full-stack healthsync-personalize multi-role management system. Cross-Platform Mobile: Delivered a complete Flutter IPTV app (iOS, Android, Web), handling the full lifecycle. ► Cloud & DevOps Architecture (AWS/GCP/Azure): I design and implement scalable and cost-efficient cloud infrastructure. Complex Cloud-Native Solutions: Architected secure, multi-cloud environments, including a sophisticated project integrating IoT devices (nRF9160) with AWS IoT Core for a New Zealand client. Infrastructure Mastery: Deep, hands-on expertise in Linux (Ubuntu, Red Hat), Virtualization (Virtualbox, VMWare, Proxmox), and Containerization (Docker, Kubernetes) to build efficient, high-performance systems. ► Cybersecurity & GRC Architecture: I build systems that are secure and compliant by design, leveraging a practitioner's understanding of both offense and defense. High-Stakes Incident Response: Successfully defended global clients by neutralizing live DDoS attacks (Australia) and architecting custom IDS/IPS rules (Snort/Suricata) to protect IoT fleets (Malta). Audit & Compliance Readiness: Guided enterprise clients through ISO 27001 & SOC 2 audit preparations. Tech Stack: Security: Wazuh, Elasticsearch Stack , Snort, Metasploit, Nessus , Nmap Cloud: AWS, GCP, Azure, Docker, Kubernetes, Terraform Dev: React, Node.js, TypeScript, Flutter, SQL/MySQL , PostgreSQL, Supabase Services Offered: End-to-End Secure Product Development (Web, Mobile, IoT). Cloud & Security Architecture (AWS, GCP, Azure). GRC & Compliance Automation (ISO 27001, SOC 2). Technical Due Diligence & Pre-Acquisition Audits. High-Stakes Problem Solving & Crisis Response. Let's connect and discuss how I can bring this comprehensive, battle-tested expertise to your most important project. menos
Contratar ahmedhassan52
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engkarimismail engkarimismail
$50 USD / hora
✅ 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 menos
Contratar engkarimismail
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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. menos
Contratar AwaisChaudhry
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With over 10 years of experience in cybersecurity, I specialize in protecting businesses and individuals from cyber threats. I've worked across industries such as finance, healthcare, and retail, helping clients secure their digital infrastructure with tailored solutions. What I Can Do for You: Web Application...With over 10 years of experience in cybersecurity, I specialize in protecting businesses and individuals from cyber threats. I've worked across industries such as finance, healthcare, and retail, helping clients secure their digital infrastructure with tailored solutions. What I Can Do for You: Web Application Penetration Testing I uncover vulnerabilities like SQL injection, cross-site scripting (XSS), and authentication flaws, ensuring your web applications are secure from attacks. Network Security Assessments I assess your network infrastructure, identifying weaknesses in firewalls, routers, and internal systems to prevent unauthorized access and data breaches. Cloud Security Audits I review your cloud setup to ensure proper configurations, access control, and encryption, keeping sensitive data secure. API Security Testing I help secure your APIs by identifying vulnerabilities like broken authentication, authorization flaws, and data exposure. Mobile Application Security Testing I analyze your mobile apps for security issues, such as insecure data storage and weak encryption, ensuring a safe experience for your users. Forensics & Malware Analysis I investigate suspicious activity and malware across networks, PCs, and mobile devices. My forensic analysis helps track and eliminate threats while providing insights into how the attack occurred and how to prevent future breaches. Vulnerability Scanning & Reporting I provide thorough vulnerability scans and deliver detailed reports with prioritized recommendations, helping you fix issues efficiently. Security Hardening I implement best practices in secure coding, encryption, and multi-factor authentication to protect your systems from future attacks. Compliance & Risk Assessments I ensure your business meets industry compliance standards, such as GDPR, HIPAA, and PCI DSS, while improving your overall security posture. Why Clients Choose Me: Proven Expertise With over 10 years of experience, I’ve secured businesses of all sizes and industries, delivering real results that prevent cyberattacks and strengthen defenses. Tailored Solutions Every business has unique security needs, and I customize my services to fit your specific requirements, ensuring the best protection. Actionable Reporting I don’t just identify risks—I provide easy-to-understand, actionable recommendations so you can address vulnerabilities immediately. Ongoing Support I offer continuous support and guidance, helping you stay ahead of evolving threats and ensuring your security remains strong. Let’s Work Together: Whether you need penetration testing, forensic investigation, malware analysis, or ongoing security assessments, I’m here to help. Let’s discuss how I can provide tailored security solutions to protect your business from cyber threats. menos
Contratar ahad47
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Experienced embedded system engineer with a passion for bringing products to life. With more than 15 years of experience in the industry, has a proven track record in firmware development, hardware integration, and product launches. Driven by a desire to solve problems and create value for customers. ☑️...Experienced embedded system engineer with a passion for bringing products to life. With more than 15 years of experience in the industry, has a proven track record in firmware development, hardware integration, and product launches. Driven by a desire to solve problems and create value for customers. ☑️ language Assembly, C Programming, C++, Python, Shell script, Makefile ☑️ System Programming Real-time Operaing systems, Embedded Linux, Linux device driver, Windows device driver ☑️ High level programming Win32, Linux user space, Android NDK, Qt, MFC ☑️ Firmware Programming PIC microcontroller, ATMEL, ATMEGA, STM32, Nordic, ESP32, Arduino, Raspberry PI ☑️ Embedded Communication protocol I2C, Serial Peripheral Interface(SPI), UART, USB, GPIO, Controller Area Network(CAN), Recommended Standard 232(RS232), one-wire, Recommend Standard 485(RS485), Bluetooth ☑️ Hardware design Circuit design, schematic design, PCB design, Multi-layer PCB design, Electronic design, Altium designer ☑️ Debugging JTAG, GDB, Print ☑️ Reversing IDA, OllyDbg, 2-layer PCB reversing ☑️ Security Executable file behavior analyzing, Executable file static analyzing Website security analyzing, Troubleshoot PC security level menos
Contratar AlexandrGergel
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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 menos
Contratar iosifpeterfi
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بِسْمِ اللهِ الرَّحْمٰنِ الرَّحِيْمِ In the name of ALLAH, the Most Gracious , the Most Merciful. _______________________________________________________________ I’m an experienced IT professional with a strong background in server and network administration, cloud infrastructure, and systems integration. Over the...بِسْمِ اللهِ الرَّحْمٰنِ الرَّحِيْمِ In the name of ALLAH, the Most Gracious , the Most Merciful. _______________________________________________________________ I’m an experienced IT professional with a strong background in server and network administration, cloud infrastructure, and systems integration. Over the years, I’ve worked across diverse environments — including Windows Server, AWS, Azure AD, and Office 365 — helping organizations streamline their IT operations, strengthen security, and modernize their digital infrastructure. My approach combines technical expertise with practical problem-solving. Whether it’s migrating hundreds of mailboxes, optimizing DNS and firewall configurations, or managing hybrid cloud systems, I focus on delivering reliable, secure, and seamless results. Core Expertise Email Migrations- Migrations between Office 365, Google Workspace, Zoho, GoDaddy, and cPanel Tenant-to-tenant and domain-based migrations IMAP and POP-based migrations Hybrid migration planning (on-premise to cloud) Troubleshooting mail flow, delivery issues, and MX/DNS records Ensuring seamless user transitions with zero data loss Cloud & Email Services- Email setup and management: Office 365, Google Workspace, Zoho Mail, GoDaddy AWS: EC2, VPC, SES, IAM, Route 53, CloudWatch, SNS, VPN Azure AD: Identity Management, SSO, SAML, IDP Google Cloud Platform integration DNS & Security DNS record management: SPF, DKIM, DMARC, CNAME, MX, A SSL certificate installation and troubleshooting Firewall configuration: FortiGate (Web Filter, App Control, LDAP, SSO) Server & Directory Services- Windows Server (2008–2024) and Active Directory administration Group Policy, LDAP, RADIUS, and Domain Controllers Server migration, backup & restore, and RAID management PowerShell scripting, WDS, and WSUS deployment Virtualization & Automation- Virtualization platforms: Microsoft Hyper-V, VMware ESXi, vCenter Scripting & automation: PowerShell, Bash File & Web Services- File servers: IIS FTP, FileZilla, ProFTPD, Samba Web servers: Apache, NGINX, Microsoft IIS Networking & Support- Network administration and troubleshooting Site-to-site VPN and secure connectivity Remote technical support for diverse IT systems. I take pride in delivering dependable, secure, and efficient IT solutions that help businesses operate smoothly and confidently. My goal is always to combine strong technical expertise with a people-first approach, ensuring every project — from migration to automation — creates real value for the organization. menos
Contratar zulqrn
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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. menos
Contratar brayanstiven5
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Redacción de investigaciones, Redacción de informes, Escritura técnica, Análisis de negocios, ContabilidadBringing the Human Touch to Research & Academic Excellence In an AI-driven world, quality research still demands a human touch, deep insight, intellectual rigor, and analytical precision. That’s exactly what I bring to every project. With 10+ years of experience, I specialize in all types of research, dissertations,...Bringing the Human Touch to Research & Academic Excellence In an AI-driven world, quality research still demands a human touch, deep insight, intellectual rigor, and analytical precision. That’s exactly what I bring to every project. With 10+ years of experience, I specialize in all types of research, dissertations, journal articles, and reports across diverse disciplines. Whether it’s business, economics, psychology, or social sciences, I deliver meticulously researched, well-structured, and publication-ready content. Academically, I am a BSc. in ACCOUNTING and an MA in Economics with expertise in statistical software: Excel, SPSS, STATA and R. Skills and Experience: - Excellent research and writing skills and expertise in different academic formatting styles - Familiarity with different literature and scholarly sources - Access to credible databases: PubMed, Web of Science, EBSCO, and JSTOR - Proficiency in designing and conducting research studies and expert in qualitative and quantitative data collection methods and analysis - Excellent communication and report writing skills to effectively communicate findings and insights - Ability to work efficiently and meet strict deadlines Beyond research, I conduct Statistical & Data Analysis. I provide advanced statistical analysis to support research in psychology, business, social sciences, and other fields. My proficiency includes: • Psychometric Analysis – Developing and validating measurement tools, scale construction, and reliability testing. • Factor Analysis – Identifying underlying variables in complex datasets and assessing data structure. • ANOVA & T-tests – Comparing means and testing hypotheses to determine statistical significance. • Regression Analysis – Exploring relationships between variables for predictive modeling. • Reliability & Validity Testing – Ensuring consistency and accuracy in research findings. • Surveys & Experimental Research – Designing, analyzing, and interpreting qualitative and quantitative surveys. I don’t just deliver research, I craft insightful, data-driven, and publication-ready work that elevates academic and professional projects. Let’s collaborate to produce exceptional research that makes a lasting impact! menos
Contratar NoelReubenMuturi
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💻 Anything IT 💻 Web & Development: MERN, LAMP, Laravel, CodeIgniter, Node.js, WordPress, Shopify, Custom CMS/CRM Servers & DevOps: Linux, Apache/Nginx, Docker, CI/CD, Automation, Virtualization, Deployment Databases: MySQL, PostgreSQL, MongoDB and other Mail & Communication: Mail servers, SMTP, VoIP, Vicidial,...💻 Anything IT 💻 Web & Development: MERN, LAMP, Laravel, CodeIgniter, Node.js, WordPress, Shopify, Custom CMS/CRM Servers & DevOps: Linux, Apache/Nginx, Docker, CI/CD, Automation, Virtualization, Deployment Databases: MySQL, PostgreSQL, MongoDB and other Mail & Communication: Mail servers, SMTP, VoIP, Vicidial, Asterisk Security & Scripts: Hardening, Pen Testing, Script Installations, Cron Jobs Fast, reliable, full-stack IT solutions – from code to servers. menos
Contratar rachitphuyal
