Top Upwork Freelancers

Clear all filters

Mykola I.

Mykola I.

Microcontrollers, networking, databases

Ukraine - Tests: 6 - Portfolio: 2

I am 38-year-old telecommunication engineer who working in Ukranian telecommunication company "Intertelecom". Last 7 years I develops and maintains database "Inventory" on Oracle database and web interface APEX. This database contains information about the company sites allocation and their contents. I planned to integrate monitoring system Zabbix with database "Inventory" to monitoring company equipment on remote sites. My Zabbix expirence includes installing zabbix components on separated servers, partitioning Zabbix database, using Zabbix-Proxy, loading data into Zabbix from non-SNMP equipment using Zabbix-sender,synchonise Zabbix configuration using zabbix API. My other strong skill is design hardware and software using Atmel and Microchip microcontrollers. I have expired Cisco CCNA certificate. I also have some experience in the following areas: Linux(Debian,Ubuntu), Delphi, Alcatel-Lucent(5ESS,ECP), Solaris.

$20.00 /hr
9 hours

George-Paul B.

George-Paul B.

Website designer

Romania - Tests: 3 - Portfolio: 8

First thing first: I like doing custom tasks for OpenCart, can do minor customization for Wordpress as well. I work from home so time is not an issue, I can work as much as it takes to accomplish my tasks and goals as long as I find them feasible. I've learned a bit of everything as I was exploring the Internet, just like everyone else that asks "what happens if I click this?". I know a thing or two about setting up and troubleshoot a small size network (had some 30 devices to look after). Have worked in a copy center, thus I've learned a bit about troubleshooting printers, as well as creating or modifying printable files (images, text, vectors) using CorelDRAW, MS Office, IrfanView, ABBYY Finereader. Some skills: PHP, MySQL, jQuery, CSS, Windows, networks.

$3.33 /hr
0 hours

Alexander Orlov

Alexander Orlov Agency Contractor

DevOps Engineer

Russia - Tests: 6 - Portfolio: 1

MY STATUS I have a full-time job and am available only as a consultant. I'm not available for any other commitment, but I'm managing a team of talented DevOps engineers working under NIXSRV Upwork agency: WHO I AM I'm a site operations engineer, with 6 years of experience. MY SKILLS - Linux server administration, good overall system knowledge, and good troubleshooting skills. If something doesn't work as expected, I'm able to find the root cause and fix the issue. - Bash, Python, Perl scripting. If something can be automated, I can automate it. - Web servers, good experience with Apache and NGINX. If it can be cached or load balanced, I'm able to load balance it. - Database, good experience with PosgreSQL and MySQL. I'm experienced with setting up replication, configuring backups, user management, etc. I have some experience with MongoDB as well. - Backups. I know how to set up backups with different backup strategies, automate them even in complex configurations, and make sure that they really work and can be restored. - Basic security auditing. I know how to configure firewalls iptables, ipfw and any systems that use then under the hood. I know how to set up remote logging of system events to have an audit trail in case of a break-in. - Monitoring systems. I have good experience with Zabbix, and Nagios. I'm able to set up monitoring and alerts for any metric so you team will be notified in time about all problems with your product. - Data collection and log analysis. I have experience with Graphite, Grafana, also Elasticsearch with Logstash and Kibana. Properly configured, those systems allow deep insight into functioning of your product and will help to prevent potential problems and outages. - Virtualization systems. I work with XEN and KVM hypervisor, and use Proxmox VE as a ready to use solution. - AWS. I know how to set up and properly use the Cloud so you can tap into Clouds full power and make your product both scale and be cost-effective. - I have some experience with Windows server administration, I can configure Windows servers for many use cases. - I also once wrote a Linux tutorial.

$27.78 /hr
1,186 hours

Dang D.

Dang D. Agency Contractor

Mobile/Software developer | Embedded Linux developer

Vietnam - Tests: 15 - Portfolio: 18

ALWAYS OFFER SERVICES THAT ARE NOT JUST THE BEST BUT LEGENDARY Thank you for your valuable opportunities!!! With 5-year expertise in the area of LINUX / WINDOWS-BASED EMBEDDED SYSTEMS DESIGN including hardware, firmware, and software design, I believe my abilities would be perfect for you. I will be offering you with all my effort and capabilities in + MCU-based Embedded System Development: - Language: Assembly/C/C++. - IDE: Code Composer Studio (CCS), Keil ARM, MPLAB, Atmel Studio, LPCXpresso etc. - Interfaces: RS232, USB Host/Device, Ethernet, SDCard, Wifi, Bluetooth, RF, GSM/GPRS, Audio etc. - Operating System: RTOS, uCLinux etc. - Prototype Development kit: Arduino UNO R3, PIC16 Explorer, AVR Butterfly, ATmega128, H8 Starter kit, MSP430 Starter kit, PSoC kit etc. + PCB Design using: - Tools: OrCad, Altium Designer, Eagle. + Linux-based Embedded System Development: - Language: C/C++, Python. - Interfaces: RS232, USB Host/Device, Ethernet, Wifi, Bluetooth Classic/LE, HDMI, Audio, SDCard etc. - Operating System: Ubuntu OS, Android OS etc. - Prototype Development kit: Panda, BeagleBone, Raspberry Pi etc. + DSP-based Embedded System Development: - Language: Assembly/C/C++ - IDE: Code Composer Studio (CCS) - Interfaces: PCI/PCI-X, VGA, RS232, Ethernet, Audio etc. - Prototype Development kit: TI DM642. + PC Software Development and Web Programming using: - Language: C/C++/C#, Java, SQL, HTML5 etc. - IDE: Visual Studio, Eclipse, Matlab, LabVIEW etc. + Mobile Software Development using: - iOS - Android + FPGA-based Embedded System Development: - Hardware Description Language: using Verilog HDL/VHDL. - Firmware Design Language: using Assembly/C/C++. - IDE: Altera Quartus (Quartus II, NIOS II, SoPC Builder, Qsys, SignalTap etc.), Xilinx ISE, Mentor Graphic Modelsim. - Interfaces: PCI/PCI-X/PCI-Ex, VGA/DVI/HDMI, RS232, USB Host/Device, Ethernet, SDCard, Audio etc. - Operating System: RTOS. - Prototype Development kit: DE2, DE2-115, Stratix II/III/IV, PCI-X Dev. kit, T-Pad kit, Atlys. I wish you would give me the opportunity to work with. Thank you ---------------------

$12.22 /hr
2,429 hours

Naor W.

Naor W. Agency Contractor

Official Amazon AWS Partner. Senior Cloud and Linux Expert

Israel - Tests: 3 - Portfolio: 4

I am an expert with more then 13 years of experience with systems, storage and networking. In last 5 years i`ve mostly have been working on virtualization and cloud solutions such as Amazon AWS and i`m an Official Amazon AWS Consulting Partner. I`m not running part time gigs here - systems architecture and support is my prime and only business. I can help you with architecture, set up and later maintanence and support for your infrastructure in AWS, GoGrid, Softlayer or other IaaS providers.

$55.56 /hr
397 hours

Miguel V.

Miguel V. Agency Contractor

Network and Security Engineer / Trainer

Costa Rica - Tests: 6 - Portfolio: 1

My name is Josué Vargas, I’m a Networking Engineer, specialised in network security. I have worked for industry leaders such as Cisco, Juniper Networks and IBM; in all of my jobs I’ve excelled as a technical leader and trainer, not only capable of troubleshooting highly complex network environments but also train others into achieving a greater level in the comprehension of network phenomena. Specifically, I have experience in deploying and troubleshooting platforms such as: VoIP servers and phones, switches, routers, wireless access points and clusters, TelePresence solutions, firewalls, IPS/IDS devices, web filtering an UTM solutions and even next generation security solutions such as those offered by FireEye. I have also designed networks and I understand how protocols work and interact with the different OSI layers, I have interacted with and supported protocols such as: 802.1q, Spanning Tree (MST, RSTP), 802.1p, 802.1x, PPP, Frame Relay, MPLS, EIGRP, RIP, OSPF, IS-IS, IPSec, BGP, VRRP, HSRP, SIP, FTP, DNS, DHCP and many others. I have the CCNA, CCNA Security, CCNP R&S, JNCIA JNCIS-Sec, JNCIP Sec, VMWare VCP-DCV and Certified Ethical Hacker credentials. Besides this, I work with a very well-rounded team of I.T specialists in many other disciplines, therefore we can accommodate to your needs within the price quoted.

$66.67 /hr
406 hours

Nauman Akbar

Nauman Akbar Agency Contractor

Microsoft Dynamics CRM and Sharepoint Consultant

Pakistan - Tests: 5 - Portfolio: 1

Helping companies improve business efficiency through - smart use of technologies - and better ROI from investment on technologies while maintaining good customer satisfaction and improving my quality of life and those around me. I have designed & deployed many enterprise grade solutions ranging from web portal design & development to large scale customer care solutions. The areas I have worked in include LAMP based web applications, CRM, RMS/POS, document management, workflow/business process management, contact centers, workforce optimization and HR management. After spending 10 years designing diverse applications, I am now focused on Microsoft Dynamics CRM, Microsoft Sharepoint (for document management, business process workflows, portal based applications) and Microsoft Dynamics Retail Management Solution. Though as part of larger scope I can also handle Microsoft Lync and Microsoft project server.

$40.00 /hr
478 hours

Gopinath G.

Gopinath G. Agency Contractor

ASP.NET 4.5, MVC 5, SQL Server 2012, VBA, Matlab, NS3, NS2 Expert

India - Tests: 7 - Portfolio: 2

Qualified Professional Web Developer with 4 years of experience working on Microsoft Technologies framework using MVC5 C#, Silverlight SQL, Javascript,Jquery, VBA Macro. Strong Knowledge on ASP.Net using C# and VB.Net, HTML5, CSS3, bootstrap styles, ready to take any challenging tasks to be accomplished in short duration and strong coordination with team work. Expertise in NS2, NS3, Matlab, Java, simulation,Implementing new Protocol, coding using C,C++, java and Technical Guidance, Report Writing.

$11.11 /hr
38 hours

Joel K.

Joel K. Agency Contractor

IT Support Technician

United States - Tests: 9

My name is Joel Katako, I live in the US, and I recently graduated from college with an Associate Degree of Applied Science in Computer Networking - Cyber Security. I was enrolled in the Cisco & Microsoft Academy where I studied and worked on but not limited to Cisco Equipment (Routers, Switches, IP Phone and Firewall Appliances), MS Windows Server 2008 Server Configuration and Active Directory, MS SQL Server, UNIX based OS (Kali Linux, Ubuntu, Fedora), C, C++, MySQL Language Programming... I am a Cisco Certified Network Associate (CCNA) Certified and planing on taking my Microsoft Certified Solutions Associate (MCSA) Certification soon. While attending college, I worked as an IT Desktop Support for the college IT Department for about 1 year where I was responsible of setting up and troubleshooting Cisco Routers & Switches, PC Workstation with Windows 7, Windows Servers 2008, and UNIX based OS, and Virtual Machines. On the side, I used my knowledge and understanding of the English and French Language to serve as a Tutor and Translator for the Tutoring Department. I'm confident that my skills and experience will be put at good use on this platform. Thanks ahead for your time and the opportunity to serve you. I know I can be very helpful, so please do not hesitate to contact me if you need a job well done.

$20.00 /hr
49 hours

Ivan Anishchuk

Ivan Anishchuk Agency Contractor

Python/Django developer

Russia - Tests: 17 - Portfolio: 11

I am a Python developer. I can use Python in almost any task and context. And I love using Python, although I know other languages if you need something occasionally. Just contact me if you need a web developer without ophidiophobia :) I have more than four years of web-programming experience with Django framework (on both large and small projects, plus some experience with Flask and other frameworks) and more than six years of professional Python coding. And I want to continue it: participate in web-development with Django or otherwise, developing desktop applications, writing various helpers and integration scripts and so on. Working on different projects, I've got a vast experience with different version control systems (strongly prefer Git, but can use Mercurial and Subversion if needed) and common workflow techniques, like Gitflow. Collaboration services and task trackers I worked with are too numerous to mention. Additionally, I have some experience with other technologies and experience of Linux system administration and know the best practices for system design, performance and search engine optimization, web application deployment, setting up hosting servers, continuous integration, monitoring. And I can learn new things, of course. Technologies I can use for front-ends (when I have to do them): - HTML5, - CSS3, - Javascript, - jQuery, - Twitter Bootstrap. For back-ends I can build both usual MVC-style applications and REST APIs. I have experience with a lot of Django reusable apps and know what to use for which task. Just to name a few I'm familiar with: - Tastypie, - Django REST Framework, - Haystack, - Celery, - Storages, - Factoryboy. In terms of deployment and systems administration, I know a thing or two about - Nginx, - uWSGI, - Supervisor, - systemd, - Fabric. On top of it, I know a lot about various useful SaaSes, like: - AWS (EC2, RDS, S3/CloudFront) - DigitalOcean, - Twilio, - Stripe, - Firebase. I tried to keep those lists short and clear, so if you need some particular technology I haven't listed feel free ask me about it; chances are that I worked with it or at least know something about it. (And please never mind the "agency contractor" thing — I am my own staffing manager in that agency and I don't work for anyone else. The agency was formed only for payment consolidation with a couple of friends.)

Groups: Coding Champs

$25.00 /hr
1,377 hours