T
On-siteFull-timeSenior
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Estimated pay
Estimate£92K–£135K/yr
Estimate — the employer hasn't published pay.
Based on 8 similar senior Software Engineer jobs in United Kingdom that show pay. The range is the middle half of their posted pay (25th to 75th percentile), not an offer — ask the employer for the real range.
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At a glance
- Experience asked
- 5+ years
- Education
- Master's
Skills mentioned
networkingc++distributed systemsgojavascriptkubernetespythonrust
About the role
<p></p>
<h3><strong><span data-contrast="none"><span data-ccp-parastyle="heading 2">About </span><span data-ccp-parastyle="heading 2">Tavily</span></span></strong><span data-ccp-props="{"134245418":true,"134245529":true,"335551550":0,"335551620":0,"335559738":160,"335559739":80}"> </span></h3>
<p><span data-contrast="none">We're building the infrastructure layer for agentic web interaction at scale. Our API is designed from the ground up to power Retrieval-Augmented Generation (RAG) and real-time reasoning in AI systems. By connecting LLMs to high-quality, trustworthy web content, we help developers build agents that are not only intelligent — but also informed.</span><span data-ccp-props="{"335551550":0,"335551620":0}"> </span></p>
<p><span data-contrast="none">We work with some of the most innovative teams in AI — from small startups shaping the ecosystem to the largest enterprises deploying AI at scale. Whether it's powering sales assistants, research copilots, or internal knowledge tools, we're the missing link between LLMs and the real world.</span><span data-ccp-props="{"335551550":0,"335551620":0}"> </span></p>
<h3><strong><span data-contrast="auto">The Role</span></strong></h3>
<p class="font-claude-response-body break-words whitespace-normal">We are looking for a Senior Software Engineer to build the web access infrastructure behind a novel search engine designed for agentic AI.</p>
<p class="font-claude-response-body break-words whitespace-normal">In this role, you will investigate how modern websites communicate with browsers and translate that understanding into production systems operating at internet scale. You will build browser infrastructure and tooling that enables reliable, efficient access to web content across a rapidly changing web.</p>
<p class="font-claude-response-body break-words whitespace-normal"><strong>Your responsibilities will include:</strong></p>
<ul class="[li_&]:mb-0 [li_&]:mt-1 [li_&]:gap-1 [&:not(:last-child)_ul]:pb-1 [&:not(:last-child)_ol]:pb-1 list-disc flex flex-col gap-1 pl-8 mb-3 print:block print:space-y-1">
<li class="font-claude-response-body whitespace-normal break-words pl-2">Research and analyse how modern websites communicate with browsers across the complete request lifecycle</li>
<li class="font-claude-response-body whitespace-normal break-words pl-2">Investigate browser fingerprinting, client verification mechanisms, and modern web technologies to enable reliable web access</li>
<li class="font-claude-response-body whitespace-normal break-words pl-2">Build tooling for browser instrumentation, debugging, observability, and large-scale experimentation</li>
<li class="font-claude-response-body whitespace-normal break-words pl-2">Translate technical research into production systems operating at internet scale</li>
</ul>
<p class="font-claude-response-body break-words whitespace-normal"><strong>Requirements</strong></p>
<p class="font-claude-response-body break-words whitespace-normal">You have 5+ years of experience as a software engineer working on production backend or infrastructure systems, and are an expert in several of the following areas:</p>
<p class="font-claude-response-body break-words whitespace-normal"><em>Browser Technologies</em></p>
<ul class="[li_&]:mb-0 [li_&]:mt-1 [li_&]:gap-1 [&:not(:last-child)_ul]:pb-1 [&:not(:last-child)_ol]:pb-1 list-disc flex flex-col gap-1 pl-8 mb-3 print:block print:space-y-1">
<li class="font-claude-response-body whitespace-normal break-words pl-2">Chromium architecture and browser internals</li>
<li class="font-claude-response-body whitespace-normal break-words pl-2">Browser lifecycle and navigation</li>
<li class="font-claude-response-body whitespace-normal break-words pl-2">Chrome DevTools Protocol (CDP)</li>
<li class="font-claude-response-body whitespace-normal break-words pl-2">Playwright, Puppeteer, Selenium, or similar browser automation frameworks</li>
<li class="font-claude-response-body whitespace-normal break-words pl-2">Browser instrumentation and debugging</li>
</ul>
<p class="font-claude-response-body break-words whitespace-normal"><em>Web Platform</em></p>
<ul class="[li_&]:mb-0 [li_&]:mt-1 [li_&]:gap-1 [&:not(:last-child)_ul]:pb-1 [&:not(:last-child)_ol]:pb-1 list-disc flex flex-col gap-1 pl-8 mb-3 print:block print:space-y-1">
<li class="font-claude-response-body whitespace-normal break-words pl-2">HTTP/1.1, HTTP/2, HTTP/3 — TLS, DNS, and browser networking</li>
<li class="font-claude-response-body whitespace-normal break-words pl-2">Cookies, browser storage, caching, redirects, and session management</li>
<li class="font-claude-response-body whitespace-normal break-words pl-2">JavaScript execution and modern client-side rendering</li>
<li class="font-claude-response-body whitespace-normal break-words pl-2">Resource loading, page lifecycle, and browser networking</li>
<li class="font-claude-response-body whitespace-normal break-words pl-2">Browser fingerprinting concepts and browser characteristics</li>
</ul>
<p class="font-claude-response-body break-words whitespace-normal"><strong>Nice to Have</strong></p>
<ul class="[li_&]:mb-0 [li_&]:mt-1 [li_&]:gap-1 [&:not(:last-child)_ul]:pb-1 [&:not(:last-child)_ol]:pb-1 list-disc flex flex-col gap-1 pl-8 mb-3 print:block print:space-y-1">
<li class="font-claude-response-body whitespace-normal break-words pl-2">Experience working on browser engines or browser infrastructure</li>
<li class="font-claude-response-body whitespace-normal break-words pl-2">Experience reverse engineering browser or web application behaviour</li>
<li class="font-claude-response-body whitespace-normal break-words pl-2">Experience building internet-scale distributed systems</li>
<li class="font-claude-response-body whitespace-normal break-words pl-2">Go, C++, Rust, or Python</li>
<li class="font-claude-response-body whitespace-normal break-words pl-2">Kubernetes and cloud infrastructure</li>
</ul>
<p><span data-ccp-props="{}"><em data-stringify-type="italic">We conduct coding interviews as part of the process.<br><br></em></span></p>
<p><strong><span data-contrast="none"><span data-ccp-parastyle="heading 2">Why </span><span data-ccp-parastyle="heading 2">Tavily</span><span data-ccp-parastyle="heading 2">?</span></span><span data-ccp-props="{"134245418":true,"134245529":true,"335551550":0,"335551620":0,"335559738":160,"335559739":80}"> </span></strong></p>
<ul>
<li data-leveltext="" data-font="Symbol" data-listid="4" data-list-defn-props="{"335552541":1,"335559683":0,"335559684":-2,"335559685":720,"335559991":360,"469769226":"Symbol","469769242":[8226],"469777803":"left","469777804":"","469777815":"hybridMultilevel"}" data-aria-posinset="1" data-aria-level="1"><strong><span data-contrast="none">Full ownership</span></strong><span data-contrast="none"> — small team, you own the entire infrastructure, not a slice of it</span><span data-ccp-props="{"134233117":false,"134233118":false,"335551550":0,"335551620":0,"335559738":0,"335559739":0}"> </span></li>
</ul>
<ul>
<li data-leveltext="" data-font="Symbol" data-listid="4" data-list-defn-props="{"335552541":1,"335559683":0,"335559684":-2,"335559685":720,"335559991":360,"469769226":"Symbol","469769242":[8226],"469777803":"left","469777804":"","469777815":"hybridMultilevel"}" data-aria-posinset="2" data-aria-level="1"><strong><span data-contrast="none">Real scaling challenges</span></strong><span data-contrast="none"> — bursty scraping workloads, cache invalidation, multi-region, millions of daily requests</span><span data-ccp-props="{"134233117":false,"134233118":false,"335551550":0,"335551620":0,"335559738":0,"335559739":0}"> </span></li>
</ul>
<ul>
<li data-leveltext="" data-font="Symbol" data-listid="4" data-list-defn-props="{"335552541":1,"335559683":0,"335559684":-2,"335559685":720,"335559991":360,"469769226":"Symbol","469769242":[8226],"469777803":"left","469777804":"","469777815":"hybridMultilevel"}" data-aria-posinset="3" data-aria-level="1"><strong><span data-contrast="none">AI-native company</span></strong><span data-contrast="none"> — your infra directly powers AI agents used by leading companies in the space.</span><span data-ccp-props="{"134233117":false,"134233118":false,"335551550":0,"335551620":0,"335559738":0,"335559739":0}"> </span></li>
</ul>
<p><span data-ccp-props="{}"><em data-stringify-type="italic"> </em></span></p>
<p> </p>
<p></p>
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