What the role involves
Staff Engineer — Throxy
About Throxy
throxy is a small applied research lab working on the future of sales. The next $1T company will be a software company masquerading as a services firm.
We are a group of researchers, engineers, and technologists in London inventing at the edge of what's useful and possible.
At throxy, we are building agents that generate sales pipeline for our customers.
If you're interested in the types of problems we're working on, we'd love to hear from you.
We're a small, talent dense team moving extremely fast. Our engineers ship to production daily, talk directly to customers, and own problems end-to-end.
The Role
As a Staff Engineer, you'll be one of the most senior ICs on the team. You won't be handed tickets, you'll be handed problem spaces and trusted to figure out the right thing to build, then build it.
You'll set technical direction across multiple product surfaces, make the architectural calls that the next 50 engineers will live with, and stay hands-on in the code while doing it.
This is a player-coach role. ~70% IC, ~30% leverage (design docs, reviews, mentoring, unblocking).
What You'll Do
Own ambiguous, cross-cutting problems end-to-end — from "this is slow / broken / missing" to shipped and measured
Design the systems behind our AI agents, LLM evaluations, data pipelines, and provider waterfalls
Set technical standards for the codebase
Mentor senior and mid-level engineers; raise the bar through code review and design review
Partner directly with the founders and Head of Engineering on roadmap and technical strategy
Talk to customers, watch them use the product, and turn that into shipped improvements within days
What We're Looking For
6+ years of production software engineering experience (or equivalent scope) at a high-velocity company
Deep expertise in TypeScript and modern web infra, we run Next.js (App Router), Trigger.dev, Postgres/Drizzle
Strong systems thinking: you've designed distributed systems, data pipelines, or large-scale background job infrastructure that actually held up
Comfort with LLM-based systems, prompt design, evaluations, agentic workflows, structured outputs. You don't need to have built foundation models, but you've shipped real LLM features and know where they break
Track record of going from zero → one on ambiguous problems without a PM holding your hand
Strong written communication, you can write a design doc that aligns a room
Bias to action. You'd rather ship a working v1 today than a perfect v1 next month
Why Throxy
Real ownership, small team, big surface area, your fingerprints will be everywhere
Senior bar, everyone you work with will sharpen you
AI-native from day one, we're not retrofitting AI onto a legacy product
Speed, design doc on Monday, in production by Friday, in front of customers by next week
About throxy
throxy builds vertical AI agents that book meetings for software companies selling into traditional industries: manufacturing, logistics, education, and finance. Outbound is broken. Generic automation gets ignored, and decision-makers in legacy sectors are hard to reach. Most of your TAM isn't even on LinkedIn, and tools like Clay, Apollo, and ZoomInfo only cover about 65% of the market. throxy fixes this by running bespoke, fully managed outbound systems for software sales teams trying to crack these industries. We use proprietary scraping tools to map your entire addressable market, then combine AI agents with human experts to deliver hyper-personalised email campaigns and human cold calling that is consistently generating six-figure qualified pipelines. Since 2023, throxy has powered outbound for B2B software companies, from industrial SaaS to fintech providers, replacing the need for internal SDR teams or stacks of tools with a solution that outperforms on both speed and quality. Today, we have a team of 55 across London and Cape Town, booking on average 8 to 12 qualified meetings per month per client, with some clients seeing 20+ in their first weeks after we doubled down on human-led cold calling. AI handles the data: building custom databases, scoring leads against your ICP, and personalising outreach at scale. Humans handle the conversations: real cold calls, real emails, real relationships. That's the difference between us and every AI SDR on the market. Our founding team has built AI at JP Morgan, scaled businesses from age 14, and led enterprise sales from Seed to Series D. We're not just automating outbound, we're redefining what sales execution looks like for software companies selling into traditional industries. throxy is the AI SDR purpose-built for the sectors software forgot.
Full throxy profile