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Blackwall is an AI-enabled cybersecurity and web infrastructure company that has raised $100 million in Series C funding at a $2.2 billion valuation. The company's flagship product, GateKeeper, protects over 2.3 million websites and applications through more than 100 hosting and service partners worldwide. Blackwall is building the next generation of web traffic management technology to address emerging challenges as AI agents and automated systems reshape the internet.
You will join as a Software Engineer reporting to the VP of Engineering, working on a remote-first basis within Europe. The role focuses on developing and evolving Blackwall's web infrastructure and security technology.
Key responsibilities include:
- Design, develop, and optimize high-performance software for web traffic management, security, and automated threat mitigation
- Build and improve components of web infrastructure, traffic processing, and bot detection systems
- Investigate automated threats including scraping, crawlers, credential stuffing, and abusive automation to develop defensive solutions
- Work with web servers, networking technologies, and open-source infrastructure, extending existing components as needed
- Explore new technologies and use AI-assisted development tools to accelerate engineering work
- Contribute to technical architecture, challenge existing approaches, and take ownership of solutions through to production
The company values engineers who understand how the internet works, enjoy solving complex technical problems, and genuinely love building software. You might have developed networking software, contributed to open-source infrastructure projects, built web scraping or automation systems, or worked on security and fraud prevention technologies. The company embraces AI-assisted development and values engineers who can use modern tools effectively while bringing creativity, technical depth, and problem-solving skills.
Tech stack includes C++, Go, PHP, Nginx, Apache, PostgreSQL, ClickHouse, RabbitMQ, Kubernetes, Docker, GitLab CI/CD, and Linux. Experience with these specific technologies is not a prerequisite.
Employment options are available in the UK, Spain, Germany, and Estonia; contractor arrangements elsewhere in Europe.
REQUIREMENTS:
- Strong software engineering experience, ideally in web infrastructure, networking, cybersecurity, internet automation, or related technical domains
- Solid understanding of internet technologies, including HTTP, web servers, networking, and web application infrastructure
- Experience building complex, scalable, or performance-sensitive software systems
- Ability to work across programming languages and technologies rather than being dependent on a particular stack
- Genuine technical curiosity, demonstrated through professional work, open-source contributions, personal projects, or independent experimentation
- Strong problem-solving skills, independent thinking, and willingness to challenge assumptions
- Ability to use AI development tools effectively while maintaining sound engineering judgement
Particularly valuable experience includes: web servers and reverse proxies (Nginx, Apache), bot mitigation, web security, fraud prevention or anti-abuse technologies, web scraping, crawling, browser automation or automated traffic systems, open-source infrastructure development, or high-performance networking and distributed systems.
