Software Engineer Fullstack

About the RoleBuild the engine behind the outcome:Most applied AI companies sell tools. throxy sells the work itself: pipeline that closes revenue. Our customers don't care how it happens. They care that it does. That distinction changes everything about the engineering. Every improvement we ship makes the service faster and harder to compete with. Better models don't threaten us. They compound us.We have product-market fit, month-over-month growth, and a clear roadmap.

Small, senior engineering team where your code directly drives revenue. This is a rare window: early enough to build foundational systems, our customers range from Fortune 500s to the fastest-growing startups.North StarOwn problems end-to-end. You'll build the systems you've seen at other companies, from scratch, with real users from day one. Scope it, build it, ship it, iterate.Why throxyWhy throxy:01The model compounds youEvery AI improvement makes our service faster and harder to compete with.

You're building on a tailwind, not racing against one.02Proven, not speculativeProduct-market fit, month-over-month growth, and customers paying for outcomes. The business works. Now we need to scale the engineering.03Build what you've only seenDialer infrastructure, agent systems, intelligence pipelines. The systems you've watched other companies build, you'll own here.04Small team, real leverageA handful of AI-augmented engineers shipping systems that generate pipeline for hundreds of customers.

Your work has outsized impact because the team is small and the surface area is large.Tech StackThe stack:We're building with TypeScript, React, Next.js, and modern AI tooling. Our infrastructure includes AWS, OpenSearch, Trigger.dev, ClickHouse, and Datadog. We care about clean code, fast iteration, and engineering excellence.What You'll BuildThese are not roadmap items. They are in flight:01Calling InfrastructureWe're rebuilding our dialer from scratch with agents at the core.

Humans focus on the conversation. Agents handle everything else.02AI Inbound SDRThousands of callbacks come in every month across our customer base. You'll build the system that handles them autonomously and converts them to meetings.03Intelligence LayersAfter every call, we generate insights, proposals, and targeting signals that feed back into the next campaign. You'll build the closed loop.04Prospecting EngineCustom scraping, AI qualification pipelines, and list logic that finds the right people before anyone else does.Strong SignalsStrong signals:01Top-Tier ExperienceExperience at a high-calibre tech company: FAANG, Bloomberg, Stripe, Shopify, Revolut, Datadog, or similar.02Startup DNATime at a startup or small team (< 20 people) where you wore many hats.03AI/LLM BuilderExperience building with AI/LLMs: AI agents, RAG systems, or LLM-powered features.04Ships SoloYou've built something end-to-end on your own: a side project, an open source tool, a past business.Must-HavesWhat we're looking for:01Professional software engineering experience: 3+ years for mid-level, 6+ years for senior roles02Fullstack web development skills: comfortable building in both the frontend and backend03Strong fundamentals in computer science: data structures, algorithms, performance trade-offs04TypeScript and React experience (Next.js is a big plus)05A CS degree or equivalent from a strong university06Based in the UK or willing to relocate to LondonHiring ProcessOur hiring process:Screening callWe get to know each other.

We'll talk about your experience, what you're looking for, and give you a clear picture of throxy.Technical phaseA hands-on assessment of your coding and problem-solving skills.Follow-up conversationMeet more of the team, talk about culture, role expectations, and comp.We aim to move through the full process in 72 hours.