
Blackwall (formerly BotGuard) is a security and web infrastructure company founded in 2019 by Nikita Rozenberg (CEO) and Denis Prochko (CTO). The company provides AI-enabled web traffic management solutions by partnering with Hosting Services Providers (HSP’s), Managed Service Providers (MSPs) and eCommerce Platforms, who typically host thousands, to hundreds of thousands of websites.

Blackwall (formerly BotGuard) is a security and web infrastructure company founded in 2019 by Nikita Rozenberg (CEO) and Denis Prochko (CTO). The company provides AI-enabled web traffic management solutions by partnering with Hosting Services Providers (HSP’s), Managed Service Providers (MSPs) and eCommerce Platforms, who typically host thousands, to hundreds of thousands of websites.
Flagship product: GateKeeper — a high-availability reverse-proxy for real-time traffic inspection and mitigation
Threat coverage: Mitigates malicious bots, L7 DDoS, brute-force attacks while providing WAF, caching, rate limiting
Recent funding: €45M Series B (Mar 2025) led by Dawn Capital
Founders: Nikita Rozenberg (CEO) and Denis Prochko (CTO)
Rebrand: Rebranded from BotGuard (legal name Botguard OÜ) to Blackwall
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Automated web threats and malicious traffic targeting hosting providers, managed service providers and large multi-tenant web platforms.
2019
Cybersecurity / Web infrastructure
€45M
Company announced rebrand from BotGuard to Blackwall; existing investor MMC Ventures participated.
€12M
“Series B led by Dawn Capital (MMC Ventures participated); third-party profiles list multiple investors (Crunchbase lists eight investors, including Tera Ventures).”
We are a dynamic and fast-growing start-up dedicated to revolutionising Cyber security with advanced bot mitigation products. Our innovative approach and cutting-edge technologies have positioned us as a future leader in the market. We are seeking a highly motivated and experienced Pre-Sales Architect/Sales Engineer, to join our team and play a vital role in shaping our company's growth and success.
As a Pre-Sales Solutions Architect you will work as part of our Infrastructure and Solutions teams and play a crucial role in supporting our Sales team.
You will leverage your expertise to connect the customers' demand with our Security Software Products and Solutions. This covers all aspects from crafting solutions for customers as well as leading Proof of Concepts (PoC) and advising customers on architecture, technology, network-security and matching this to viable business models.
You’ll work closely with customers to explore their infrastructure, identify pain points, and propose secure, scalable solutions. By combining technical knowledge with strong communication skills, you’ll build credibility, support the sales cycle, and ensure each solution aligns with both technical and business goals.
This role is individual-contributor-oriented, requiring a strong team player with a proven track record in the cybersecurity area of expertise, preferably within the hosting industry, e-Commerce or cloud infrastructure projects.
Key Responsibilities:
Essential Skills & Requirements:
We are striving to create a diverse and inclusive environment. We encourage all applicants to apply for our roles. We value and actively seek diverse talent!
Get to know us a bit better:
https://blackwall.com/en/home