Founding Senior Engineer (up to £140k)

Dex; Greater London; Vor Ort; GBP 90.000 - 150.000; Vollzeit

Zusammenfassung

Dex in London is seeking a Founding Senior Engineer to own the desktop application, backend, and core algorithms for a proactive AI assistant. You will work directly with AI researchers in a small, high‑calibre team to build a complex system from first principles, not just integrate existing components.

You should have a PhD or demonstrable ownership of large, end-to-end technical projects, 5+ years building complex systems, and strong proficiency in TypeScript, Python, Rust, or C++.

Qualifikationen

• PhD or demonstrable ownership of a hard, end-to-end technical project.
• 5+ years building complex systems.
• Strong in TypeScript, Python, Rust or C++ and ability to learn new languages quickly.
• Experience shipping robust products end-to-end and working from user requests.
• Comfortable with cloud infrastructure and databases (SQL/NoSQL).
• Willingness to work in person in London five days a week.

Aufgaben

• Build and own the desktop application frontend and backend.
• Develop core algorithms bridging the AI model and user actions.
• Design and implement backend data ingestion and model maintenance systems.
• Collaborate with AI researchers to translate research into production features.
• Drive architectural decisions across the full stack from UI to data persistence.

Kenntnisse

5+ years building complex systems

TypeScript

Python

Rust

C++

learn new languages quickly

Cloud platforms

SQL/NoSQL databases

Ausbildung

PhD

Tools

Cloud platforms

Databases (SQL/NoSQL)

APIs

Jobbeschreibung

The role

This team is building a truly proactive AI assistant. Not a chatbot, but an agent that maintains a living model of a user's entire work history — emails, messages, documents — to anticipate needs and act on their behalf. They are in private alpha with early customers, backed by leading investors, and founded by a small group of repeat founders with deep technical backgrounds.

As a Founding Senior Engineer, you won't own a slice of the stack. You'll manage the whole thing: desktop application, backend, and algorithmic development, working directly with AI researchers. This is a chance to define your scope, not inherit it, building a complex system from first principles in a small, high-calibre team. It's for engineers who want to build, not just integrate.

The work

• Build and own the desktop application, front and back end.
• Develop core algorithms that bridge the AI model and user actions.
• Design and implement the backend systems for continuous data ingestion and model maintenance.
• Work directly with AI engineers, translating research into robust, shippable product features.
• Drive architectural decisions across the entire stack, from user interface to data persistence.

What You Bring

• A PhD or demonstrable personal ownership of a hard, end-to-end technical project.
• 5+ years building complex, comparable systems, solving genuinely hard problems.
• Strong in TypeScript, Python, Rust, or C++, with a proven ability to quickly master new languages.
• Experience owning the full engineering lifecycle: shipping robust products, working from user requests, and ideally running scientific processes.
• Comfortable with cloud infrastructure, SQL/NoSQL databases, and self-organising in an ambiguous environment.
• Willingness to work in person in London (Elephant and Castle) five days a week.