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Mostrando 115 resultados
Freelancers patrocinados
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Contratar iosifpeterfi
I've spent the last 15 years building and running the systems that businesses actually depend on. Most of my work falls into three buckets: taking a SaaS product from Software Architecture through to production on AWS (React, Angular, Vue.js or Next.js up front, Node.js, Python, PHP or Java behind the REST API,...I've spent the last 15 years building and running the systems that businesses actually depend on. Most of my work falls into three buckets: taking a SaaS product from Software Architecture through to production on AWS (React, Angular, Vue.js or Next.js up front, Node.js, Python, PHP or Java behind the REST API, PostgreSQL, MySQL, MongoDB, MariaDB or SQL Server underneath), wiring together the Cloud Computing and DevOps layer (Docker, Kubernetes, CI/CD pipelines, Ansible, Nginx, Apache, DNS, SSL, cPanel, Web Hosting, Virtualization), and then hardening everything with Cloud Security and Performance Tuning so it doesn't fall over at 2am. Where I add the most value is in Infrastructure Architecture and Systems Engineering decisions early on — Database Design, API Development contracts, security and observability before they become expensive. I've done this for e-commerce platforms (Shopify, WooCommerce, Magento) to ERP rollouts (Zoho, ERPNext, PowerApps) to enterprise governance and workflow systems (Spring Boot, BPMN, Microsoft Graph, n8n, ProcessMaker, Joget, Flowable, role-based access, audit trails) to custom Data Analytics pipelines, Excel reporting and BI dashboards. More recently I've been doing AI Development work — integrating LLMs, Prompt Engineering, and Typescript-based tooling into real workflows. Not the hype kind, but practical automation that saves time. I write Shell and Python scripts the way some people write emails: constantly. If something can be automated, it probably should be. CompTIA Security+, Microsoft MCSE/MCSA/MCITP English (C2), German (C1), Romanian (native) Based in Germany. NDA-friendly. menos -
Contratar engkarimismail
engkarimismail engkarimismail
$50 USD / hora
✅Senior Network & System Engineer | Security|VOIP✅Malaysia✅ 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 Habibkhan82
With over 15 years of expertise, I deliver top-tier technical support across diverse channels, including phone, chat, email, video calls, and remote desktop assistance. I specialize in helpdesk technical support tasks, resolving IT tickets, and tackling various technical challenges, ensuring smooth operations for your...With over 15 years of expertise, I deliver top-tier technical support across diverse channels, including phone, chat, email, video calls, and remote desktop assistance. I specialize in helpdesk technical support tasks, resolving IT tickets, and tackling various technical challenges, ensuring smooth operations for your business. My proficiency extends to Google Workspace, where I offer comprehensive services encompassing technical support, consultation, and seamless migration. I excel in troubleshooting email delivery issues and implementing robust email authentication protocols (MX, SPF, DKIM, DMARC) to bolster your email security. My skillset covers a broad spectrum of IT domains, including: Windows IT Administration (Tier 2 & 3): Expertise in Active Directory, Domain Controllers, Migrations/Upgrades, Group Policies (GPO), and Custom Solutions. Microsoft 365/O365 Cloud: Proficiency in Microsoft Authenticator and Office 365 Administration, including Outlook, Teams, Word, and Excel. Microsoft Exchange Administration: Extensive experience in troubleshooting email server and message issues. Windows 10, Windows 11 Technical Support: Comprehensive support for Windows operating systems, delivered remotely or via phone. Microsoft Azure AD and Hybrid Cloud/On-prem Domain Controllers: Adept at resolving complex issues in these environments. Debugging and Fixing Broken Automated Processes: I can efficiently address challenges with web servers, mail services, operating systems, and more. Remote Servicing and Setup: Skilled in configuring Wireless, Printers, User Account Access, and Mail Accounts. Virtual Machines: Proficiency in Microsoft Azure, Microsoft Hyper-V, VMWare Player, VMWare Workstation, ESXi/vSphere, including migrations, troubleshooting, repair, and upgrades (P2V/V2P/V2V). Cloud Services: Expertise in Amazon Web Services (AWS), Microsoft Azure, Google Cloud Platform (GCP), Alibaba Cloud, Oracle Cloud, Rackspace Cloud, and VMWare. Domain Hosting & Migration: Experience in SSL Installation and Configuration, DNS Setup, MX, SPF, DKIM, DMARC, and Cloudways setup. Advanced WIFI & Wireless Networking: Skilled in network enhancements, troubleshooting, security upgrades, and new features. Data Recovery: Capable of file recovery, drive and RAID failure resolution, and data reconstruction. Printing and Scanning: Comprehensive support for commercial-grade printing and scanning machines. Windows Domain Customization: Proficient in scripting and automation for tailored solutions. Virus Removal: Efficiently handle virus removal to ensure system security. I am dedicated to providing reliable solutions and solving any IT-related challenges you may encounter. Thank you for considering my services; I'm here to support your IT needs comprehensively. menos -
Contratar servermaster
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 menos -
Contratar osmanbsd
AWS Certified Solutions Architect – Associate cPanel & WHM System Administrator I Oracle Certified Professional for Solaris 10 CCNA Protocols/Technologies -------------------------------------- IPV4, IPV6, TCP, UDP, ICMP, SMTP, POP3, IMAP4, SNMP, ARP, DHCP, BOOTP, FTP, RADIUS, NFS, RSYNC, ISCSI, SAN, NAT, STP, ISL,...AWS Certified Solutions Architect – Associate cPanel & WHM System Administrator I Oracle Certified Professional for Solaris 10 CCNA Protocols/Technologies -------------------------------------- IPV4, IPV6, TCP, UDP, ICMP, SMTP, POP3, IMAP4, SNMP, ARP, DHCP, BOOTP, FTP, RADIUS, NFS, RSYNC, ISCSI, SAN, NAT, STP, ISL, 802.1Q, Ethernet 802.3 802.2, Ether channel, PPP, HDLC, Frame Relay, ATM, IMA, PPPoE, BGP v4, Net-Flow, WCCP, E-1, STM-1 Linux and Unix Type Operating Systems --------------------------------------------------------------- CentOS, Alma Linux, CloudLinux, Ubuntu, Debian, Sun Solaris 8, 9, 10 (Sparc and Intel) FreeBSD 4.x - 8.x OpenBSD Cloud / Amazon AWS Technologies --------------------------------------------------------- S3, EC2, VPC, RDS, Autoscaling, IAM, ELB/NLB, EFS, Lightsail, SES, WorkMail, Cloudfront, Snowball, SnowballEdge, DataSync Webhosting Control Panels / Software ------------------------------------------------------------- Cpanel/WHM, Plesk, CyberPanel Apache, Nginx, lightspeed, php-fpm Services Platforms ------------------------------ Cloudflare, Rackspace, Sendgrid, Brevo/SendinBlue, Mailgun, Godaddy, namecheap, Hostgator, namesilo, Ongage, Active Campaign, Google Workspace, Microsoft365, Squarespace, Wix, Ongage, Zoho, Klaviyo, customer.io Email Marketing Frontends ------------------------------------------- Mailwizz, Acelle Mail, Mumara, Mautic, Interspire, Octecth Oempro, 12all/Active Campaign SMTP Servers ----------------------- Postfix, Qmail, Exim, PowerMTA, KumoMTA, OpenDKIM, MailCow Virtualization / Containers ------------------------------------------ VMWare ESXi, VirtualBox, Citrix XEN Server 5.5, Citrix XEN App 5 / Presentation Server, Solaris zones, Open VZ, XEN Opensource, Docker Web/Scripting/Programming Languages ----------------------------------------------------------------- Perl, Bash shell, PHP, AWK, HTML, CGI, SQL, TSQL, Java menos -
Contratar abusayed2004
abusayed2004 abusayed2004
$50 USD / hora
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. menos -
Contratar udayarpandey2022
udayarpandey2022 udayarpandey2022
$75 USD / hora
DevOps Engineer | K8s, Docker, Terraform, CI/CDNepalDevOps Engineer specializing in cloud infrastructure automation, container orchestration, and CI/CD pipeline design across AWS and Azure. Core DevOps stack: Kubernetes, Docker, Terraform, Ansible, Jenkins, GitHub Actions, AWS (EC2, EKS, S3, IAM), Azure (AKS, VMs, DevOps Pipelines), Prometheus, Grafana, CEPH storage,...DevOps Engineer specializing in cloud infrastructure automation, container orchestration, and CI/CD pipeline design across AWS and Azure. Core DevOps stack: Kubernetes, Docker, Terraform, Ansible, Jenkins, GitHub Actions, AWS (EC2, EKS, S3, IAM), Azure (AKS, VMs, DevOps Pipelines), Prometheus, Grafana, CEPH storage, Linux, Bash/Python scripting (expert level). Beyond core DevOps, I bring deep infrastructure and security experience: • Virtualization: VMware, Proxmox, KVM • VoIP/Telephony: Asterisk (PBX design, deployment, troubleshooting) • DNS & DNS Security: architecture, hardening, DNSSEC, threat mitigation • Security: penetration testing, website/application security audits • WordPress: expert-level development, hardening, performance • End-to-end infrastructure design, monitoring, and 24/7 reliability engineering I design systems that are automated, secure, and built to scale, from provisioning through production monitoring. Ganesh D. menos -
Contratar ahsan8601
Hi, I'm Ahsan, a VoIP and Unified Communications expert based in Pakistan. I lead a team of 4 specialists, and for the past 7 years we've been providing backend support to multiple VOIP provider businesses—handling everything from setup and security to ongoing maintenance. I specialize in Avaya solutions, working...Hi, I'm Ahsan, a VoIP and Unified Communications expert based in Pakistan. I lead a team of 4 specialists, and for the past 7 years we've been providing backend support to multiple VOIP provider businesses—handling everything from setup and security to ongoing maintenance. I specialize in Avaya solutions, working directly with Avaya business partners globally offering comprehensive support for: ✅ Avaya Communication Manager (CM) ✅ System Manager (SM) ✅ Session Border Controller for Enterprise (SBCE) ✅ Orchestration Designer (Avaya OD) ✅ SIP trunking ( Telnyx, Twilio, Voxtelesys and Voip.ms) ✅ System integration and remote troubleshooting Beyond Avaya, I also have deep expertise in open-source VoIP technologies, including: ✅ Asterisk / FreePBX, 3CX & Vital PBX installation and customization ✅ SIP debugging, call routing, and diagnostics ✅ AI Voice Assistant for your Business Telephony ✅ AI Chat Assistant for your Business Telephony My skillset includes robust networking knowledge: ✅ VPNs (IPSec, WireGuard, OpenVPN and site-to-site tunnels) ✅ Firewall Configurations ( Fortinet, pfSense, OPNsense & OpenWRT) Whether you're building a new VoIP system, need ongoing support, or are facing complex SIP/NAT or SBC issues, I can help you build and maintain a secure, scalable, and stable communication platform. Let me be your remote VoIP partner — reliable, efficient, and available when you need it most. menos -
Contratar kahlonkamal318
19 Years experience as Linux/Unix Admin, System/Storage/Server Admin, Virtualization Expert => Install and troubleshoot anything on Linux/Unix, Windows => Centos, RHEL, Ubuntu, Debian, Cloudlinux, Windows => Backup, Recovery, System boot and kernel issues => Server Security and Hardening: FIREWALLD, UFW, IPTABLES,...19 Years experience as Linux/Unix Admin, System/Storage/Server Admin, Virtualization Expert => Install and troubleshoot anything on Linux/Unix, Windows => Centos, RHEL, Ubuntu, Debian, Cloudlinux, Windows => Backup, Recovery, System boot and kernel issues => Server Security and Hardening: FIREWALLD, UFW, IPTABLES, Selinux, Fixing Security vulnerabilities => User, Disk, File Management,Linux Networking/Routing, ISCSI, Multipath, LVM, Partitions => Servers: Cisco, HP, IBM, Dell, Supermicro => Hardware and Software RAID, SAN/NAS Storage => Virtualizor, KVM, Xen, ESXI, VirtualBox, VMware, Vcenter Converter => Apache, Nginx, Mysql, RDS, SSL including Letsencrypt, cPanel, Webmin, Plesk => AWS, GCP, Digital Ocean => NTP, SSH, SQUID, DHCP, BIND, Postfix, Sendmail, VNC, Kannel, HA-Lizard, DRBD, XCD-NG, RSYNC, ISCSI, Multipath, NFS, VSFTPD, Samba => WHMCS, Opencloud, Nextcloud, Zulip, OpenVPN, Polr, Odoo, Advandate, Openmeetings, TOR, Keycloak, Rocket chat, Opencanary, eSignForms, Apache Nifi menos -
Contratar umg536
Modular Solutions delivers advanced Engineering, AI/ML, Embedded Systems, and IoT solutions for startups, enterprises, researchers, and industrial clients worldwide. We transform complex ideas into production-ready systems — from AI platforms and automation tools to embedded hardware, enterprise software, industrial...Modular Solutions delivers advanced Engineering, AI/ML, Embedded Systems, and IoT solutions for startups, enterprises, researchers, and industrial clients worldwide. We transform complex ideas into production-ready systems — from AI platforms and automation tools to embedded hardware, enterprise software, industrial controls, simulations, and engineering designs. Our expertise combines Artificial Intelligence, Machine Learning, Computer Vision, Deep Learning, Data Science, Analytics, and Automation with strong software engineering capabilities in Python, C/C++, Java, C#, .NET, PHP, JavaScript, SQL, MATLAB, Simulink, and Linux-based systems. On the hardware side, we specialize in Embedded Systems, IoT Devices, FPGA/Verilog/VHDL, PCB Design, Raspberry Pi, Arduino, ARM development, RF systems, electronics, firmware, industrial automation, sensor integration, DSP, and hardware/software interfacing. We also provide Mechanical, Electrical, Civil, and Structural Engineering services including AutoCAD, Civil 3D, SolidWorks, CAD/CAM, Product Design, 3D Modelling, Simulation, Renewable Energy systems, and technical feasibility analysis. Our experience includes: • AI-powered analytics and automation platforms • Facial Recognition and OpenCV systems • Enterprise SaaS and backend platforms • Industrial automation and control systems • FPGA and embedded hardware development • MATLAB/Simulink modeling and simulation • IoT evaluation and sensor systems • CAD drafting and engineering design • Unity 3D and simulation applications • Data analytics and statistical analysis • Research, technical writing, and documentation We also support clients with Project Management, Business Analysis, Finance, Accounting, Bookkeeping, QuickBooks reconciliation, Reporting, Scientific Research, Research Writing, Technical Writing, and enterprise consulting. Our technical stack and domains include: AI & Machine Learning | Deep Learning | Neural Networks | Computer Vision | OpenCV | Data Science | Big Data | Statistical Analysis | SPSS | R Programming | Python | MATLAB | Simulink | Algorithm Development | Data Mining | Text Mining | C Programming | C++ | Java | C# | PHP | JavaScript | SQL | .NET | Software Architecture | Linux | Web Development | Electronics | Electrical Engineering | FPGA | Verilog/VHDL | Embedded Systems | IoT | Arduino | Raspberry Pi | ARM | PCB Design | RF Communications | DSP | CAD/CAM | AutoCAD | SolidWorks | Mechanical Engineering | Civil Engineering | Structural Engineering | Product Design | 3D Modelling | Unity 3D | Technical Writing | Research Writing | Project Management | Finance | QuickBooks | Business Analysis Clients choose Modular Solutions for strong communication, fast execution, technical depth, and the ability to solve complex engineering and software challenges under tight deadlines. We focus on delivering reliable, scalable, and production-ready solutions tailored to each client’s goals. menos
