Senior Software Engineer (Agentic Search) - Web Access Engineer

Team: IT

Location: UK

Commitment: Full-time

Workplace Type: remote

Accountabilities:

• Research and analyze how modern websites communicate with browsers throughout the complete request and navigation lifecycle.
• Investigate browser fingerprinting, client verification mechanisms, and emerging web technologies to improve reliable access to web content.
• Build browser infrastructure and tooling for instrumentation, debugging, observability, experimentation, and performance analysis.
• Develop systems that translate browser and web research into robust production infrastructure operating at internet scale.
• Analyze browser behavior, web application communication patterns, and client-side technologies to identify practical engineering solutions.
• Contribute to infrastructure capable of supporting bursty workloads, large-scale request volumes, caching challenges, and multi-region environments.
• Take end-to-end ownership of technical initiatives within a small team, from research and experimentation through production deployment and optimization.

Requirements:

• 5+ years of professional software engineering experience working on production backend, infrastructure, or distributed systems.
• Strong expertise in browser technologies, including Chromium architecture, browser internals, lifecycle and navigation, and browser instrumentation.
• Experience with Chrome DevTools Protocol (CDP) and browser automation frameworks such as Playwright, Puppeteer, Selenium, or similar technologies.
• Strong understanding of web platform technologies, including HTTP/1.1, HTTP/2, HTTP/3, TLS, DNS, and browser networking.
• Solid knowledge of cookies, browser storage, caching, redirects, session management, JavaScript execution, and modern client-side rendering.
• Understanding of resource loading, page lifecycle behavior, browser networking, and browser fingerprinting concepts.
• Ability to investigate complex technical behavior, conduct experiments, and translate findings into production-ready systems.
• Strong problem-solving, analytical, and debugging skills, with the ability to work independently in a fast-moving technical environment.
• Experience with browser engines or browser infrastructure is a strong plus.
• Experience reverse engineering browser or web application behavior is advantageous.
• Experience building internet-scale distributed systems is desirable.
• Proficiency in Go, C++, Rust, or Python is a plus.
• Experience with Kubernetes and cloud infrastructure is beneficial.
• Willingness to participate in coding interviews as part of the hiring process.

Benefits:

• Full ownership of infrastructure and technical initiatives within a small engineering team.
• Opportunity to solve complex internet-scale challenges involving bursty workloads, cache invalidation, multi-region infrastructure, and millions of daily requests.
• Direct impact on infrastructure powering AI agents and next-generation agentic search systems.
• AI-native engineering environment at the intersection of artificial intelligence, browsers, web infrastructure, and distributed systems.
• Broad technical ownership rather than responsibility for only a small portion of the infrastructure.