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Khanh T.

@khanhtd

annual-level-three.svgverified-v2.svgpreferred-freelancer-v3.svg
5.0
119
7.3
7.3
100%

Python | Rust | Linux | Automation | Integration

$40 USD / Hour
・
Flag of
Vietnam (5:11 PM)
・
Joined on December 23, 2012
$40 USD / Hour
・
A professional and skilled programmer with in-depth understanding of computer systems through 20 years of extensive knowledge accumulated from systems, infrastructure, security to software and applications. Expertise in utilizing Python, Rust and their ecosystems with experiences in building automation systems, socket services, performance-driven software and web applications. Software components design following OOP and DRY principles, technical writing, research proficiency, problem-solving and fast-learning abilities are my other main advantages. Service List: • Web Applications / REST and RESTful APIs • Command-Line Interface (CLI) Software • Automation Tools / Background Services / Socket Services • Web Scraping / Crawling • Parsing / Analyzing Data • Linux Systems and Services Troubleshooting • Docker, Kubernetes, CI/CD, DevOps Solutions Major Skills: Python, Flask, Django, Selenium, Rust, Serde, Tokio, Tungstenite, JavaScript, React.js, jQuery, HTML, CSS, Bootstrap, SQL, NoSQL, REST(ful) API, Linux OS, Shell, Docker, QEMU/KVM, SysAdmin, DevOps.
Verifications
On time
100%
On budget
98%
Accept rate
100%
Repeat hire rate
45%
Freelancer Linux Developers Vietnam
See all Linux Developers in Vietnam

Portfolio

Portfolio

4557178
A service running in the background which screens and filters network packets contain chat messages which are sent to the server through WebSocket protocol. The filtering engine did its jobs by referring to a predefined rule-set, also asking third party public services for any general blocking patterns. There was also a limiting engine equipped to prevent users from overusing or exploiting the chat servers system. This service is a multiprocessing program written in Python, utilizing libnetfilter_queue kernel shared library, iptables and running in Linux environment. It was able to serve up to 15K concurrent users at a same time.
Packet Filtering with Netfilter
4561106
Search for the same products as what you are providing or selling, do a comparison to find out which product is lowest in price. In order to accomplish this, the tool needs to access and login to your store (or e-commerce) website as well as connecting and being granted to "eBay API". This tool was built with respect to the eBay "API Call Limits", their usage guidelines and site policies. It was completely written in Python, directly run from the Linux console (or command line) or triggered by a Linux crontab service. Its running progress was kept in log files for easily tracking and/or debugging.
eBay Lowest Price Search
3323835
Use BASH scripting language to: * Setup ad configure StrongSwan VPN automatically * Enable RADIUS authentication by integrating StrongSwan with freeradius package, done during StrongSwan setup and configuration
Automating VPN setup with RADIUS authentication
3150523
EQC is an engine used for routing SMTP messages based on user reputation, IP healthiness and email volume sent. It's also having some features: * Merge email before sending * Probe sending to priorly verify campaign reputation before delivering whole campaign * Reduce the rotation of IPs by allocating most frequently used IPs for user * Warm-up IP during sending periods
Email Quality Control
1266654
- Map drivers and printers to many group of users, each group have different network folder and printer shares to match their specific using purposes.
Group Policies setup to map network drives & printers
1294264
Environment: - Active Directory in mix of Windows 2000 and 2003 - Exchange 2003 with several hundreds of mailboxes - Current providing services: OWA, Outlook MAPI, ActiveSync Transition Steps: - Prepared AD and installed Exchange 2010 - Configured Exchange 2010 to coexist with the old one - allow service access in case half of users were in 2003 and the other half in 2010 - Configured mail routing between two systems and made new Exchange system be publicly acceptable for sending out emails over internet - Transitioned all mailboxes and stuffs to new Exchange 2010
Transition Exchange 2003 to Exchange 2010
4557178
A service running in the background which screens and filters network packets contain chat messages which are sent to the server through WebSocket protocol. The filtering engine did its jobs by referring to a predefined rule-set, also asking third party public services for any general blocking patterns. There was also a limiting engine equipped to prevent users from overusing or exploiting the chat servers system. This service is a multiprocessing program written in Python, utilizing libnetfilter_queue kernel shared library, iptables and running in Linux environment. It was able to serve up to 15K concurrent users at a same time.
Packet Filtering with Netfilter
4561106
Search for the same products as what you are providing or selling, do a comparison to find out which product is lowest in price. In order to accomplish this, the tool needs to access and login to your store (or e-commerce) website as well as connecting and being granted to "eBay API". This tool was built with respect to the eBay "API Call Limits", their usage guidelines and site policies. It was completely written in Python, directly run from the Linux console (or command line) or triggered by a Linux crontab service. Its running progress was kept in log files for easily tracking and/or debugging.
eBay Lowest Price Search
3323835
Use BASH scripting language to: * Setup ad configure StrongSwan VPN automatically * Enable RADIUS authentication by integrating StrongSwan with freeradius package, done during StrongSwan setup and configuration
Automating VPN setup with RADIUS authentication
3150523
EQC is an engine used for routing SMTP messages based on user reputation, IP healthiness and email volume sent. It's also having some features: * Merge email before sending * Probe sending to priorly verify campaign reputation before delivering whole campaign * Reduce the rotation of IPs by allocating most frequently used IPs for user * Warm-up IP during sending periods
Email Quality Control
1266654
- Map drivers and printers to many group of users, each group have different network folder and printer shares to match their specific using purposes.
Group Policies setup to map network drives & printers
1294264
Environment: - Active Directory in mix of Windows 2000 and 2003 - Exchange 2003 with several hundreds of mailboxes - Current providing services: OWA, Outlook MAPI, ActiveSync Transition Steps: - Prepared AD and installed Exchange 2010 - Configured Exchange 2010 to coexist with the old one - allow service access in case half of users were in 2003 and the other half in 2010 - Configured mail routing between two systems and made new Exchange system be publicly acceptable for sending out emails over internet - Transitioned all mailboxes and stuffs to new Exchange 2010
Transition Exchange 2003 to Exchange 2010
Changes saved
5.0 · 119 Reviews
Reviews
C
Project for Khanh T. • $100 USD
very good excellent!!!!!!!!!!!!!!!!!!
Closed User
@cafecapsuleone
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Flag of
,
•
5 years ago
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Project for Khanh T. -- 19/04/28 10:10:20 • $300 USD
I highly highly highly recommend it
Rizik A.
@zaid27
•
Flag of
Amman, Jordan
•
6 years ago
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Project for Khanh T. -- 4 • $85 AUD
Awesome job , always great quality of work . beyond expectation!
Web D.
@webdeveloper256
•
Flag of
melbourne, Australia
•
6 years ago
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Build a tool for scheduling hours in a web based calendar • $1,025 USD
excellent as usual always delivering on time and clean code
Juan I.
@juanc2503
•
Flag of
round rock, United States
•
6 years ago
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A
Project for Khanh T. -- 2 • $25 USD
Still the best freelancer I've come across here, and very good value for money. Khanh is a high integrity and commitment freelancer.
Anton D.
@adpatza
•
Flag of
Bryanston, South Africa
•
6 years ago
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Experience
Senior Software Engineer (Remote)
Jun, 2022 - Dec, 2024
•
2 years, 6 months
Speediatech INC
Jun, 2022 - Dec, 2024
•
2 years, 6 months
● Acted as chief engineer in charge of the development of company products, business applications, APIs, and services. ● Performed regular updates and optimizations to continuously enhance product quality and performance, helping to maintain product competitive advantage and meet customer expectations. ● Evaluated and developed optimal solutions for automating product deployment, infrastructure management, and systems integration.
Flag of
Liberty Hill, United States
Jun, 2022 - Dec, 2024
•
2 years, 6 months
Senior Systems Software Engineer (Remote)
Jun, 2019 - May, 2022
•
2 years, 11 months
VirtualShield LLC
Jun, 2019 - May, 2022
•
2 years, 11 months
● Developed custom tools and contributed to programming efforts by writing code, performing reviews, and refactoring. ● Developed solutions by leveraging microservices or monolithic deployments. Designed well documented services and tools which could be operationalized. ● Leveraged both commercial and open source tools/software to drive impact for the business. Evaluated new technologies and worked with leadership to prioritize deployment in alignment with business requirements.
Flag of
Los Angeles, United States
Jun, 2019 - May, 2022
•
2 years, 11 months
Python Professional (Freelance)
Jan, 2017 - Jun, 2019
•
2 years, 4 months
Freelancer.com
Jan, 2017 - Jun, 2019
•
2 years, 4 months
● Specialized in developing Python software and applications, data analysis tools, Linux automation and deployment scripts, CI/CD solutions. ● Successfully completed more than 120 projects on Freelancer with 100% completion, 100% on-time, and 98% on-budget rates. ● Maintained a 5-star rating and one of the top preferred freelancers on Freelancer by consistently delivering outstanding works that exceeded client expectations.
Jan, 2017 - Jun, 2019
•
2 years, 4 months
Qualifications
Microsoft Certified Systems Engineer: Security
2008
Microsoft
Credential ID: #3561306
2008
CompTIA Linux+
2008
CompTIA, Inc.
Credential ID: #COMP001007993579
2008
CompTIA Security+
2009
CompTIA, Inc.
Credential ID: #COMP001007993579
2009
Certifications
P
Preferred Freelancer Program SLA
Basic Numeracy - Level 1
Basic Numeracy
US English - Level 1
US English
Unix - Level 1
Unix
Python Level 1
Python
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