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Fiverr Pro
English
$
USD
Den
@d_tsyhanenko
Level 2
Software and AI Developer, Automation, APIs and Server Administration
Ukraine
English, Ukrainian, Russian
About me
I build software that works and infrastructure that stays up. As a full-stack developer and DevOps engineer, I create web applications (React, Node.js, Python), AI chatbots and agents, custom APIs, and automation systems and I set up, configure, and manage the Linux servers they run on.
Skills
Den
$22/hour
Offline •
Average response time: 1 hour
See my services
Website UI/UX Design
I will design and develop a high converting landing page
Cloud Network & Security
I will perform a web application penetration test and security audit
Want to work on an hourly basis?
Tell Den what you need.
$22
/
hourPortfolio
Work experience
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Cybersecurity Engineer
Fiverr • Full-time
Sep 2024 - Present • 1 yr 11 mos
- Administered corporate email infrastructure for 10,000+ accounts across FortiMail and Microsoft 365, managing security policies, anti-spam, anti-phishing controls, and mail flow. - Defended against a 220,000 RPS DDoS attack through real-time WAF response, mitigating the threat with zero service disruption; continued ownership of WAF policies and critical incident response. - Designed and executed controlled phishing simulations across 2,500 office employees, developed security awareness courses, training materials, and conducted company-wide webinars. - Implemented process automation using Microsoft Power Automate and cloud services, reducing manual workload across security operations workflows. - Owned end-to-end security processes across all domains and improving them through PDCA methodology to align with evolving threats and business needs.
36 Reviews
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Rating Breakdown
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- Quality of delivery
- Value of delivery
1-5 out of 36 Reviews
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alaa_bi
Saudi Arabia
Ongoing collaboration
We always come back to work with this designer because of his exceptional talent and truly creative, out-of-the-box work. His attention to detail, professionalism, and ability to deliver unique and high-quality designs consistently exceed expectations. We will definitely work with him again and highly...
Helpful?
john_asbury
Australia
Great work in record time. Highly skilled at what he does and very happy with the result - thank you so much for refactoring this codebase! Absolute life saver. I will certainly be hiring for future projects - highly recommended. Thank you.
Helpful?
alaa_bi
Saudi Arabia
Ongoing collaboration
Working with this designer has been an exceptional experience. His work is always delivered with a high level of creativity, precision, and professionalism. We have already completed many successful projects together, and every time he continues to exceed our expectations. His understanding of our requirements,...
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madmax1
United Arab Emirates
Ongoing collaboration
Excellent developper. Great attention to detail. Followed instructions as provided and we have now a working code. Recommended!
Helpful?
alaa_bi
Saudi Arabia
Ongoing collaboration
⭐️⭐️⭐️⭐️⭐️ Excellent work! The designer understood the concept perfectly and delivered a clean, modern, and elegant design. Great communication, attention to detail, and fast response. Definitely recommended and will continue working together on the next phase!
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