Chief Technology Officer

Company: BJAK

Location: London

Posted: May 12th, 2026

About the Role

A1 is building a proactive AI chat app for everyday users to bring intelligence to conversations, errands, organising and workflows. Unlike traditional chat-based applications, our product focuses on achieving high reliability for long-running workflows, persistent context, and real-world task completion. The system must handle multi-step reasoning, interact with external tools, and remain reliable despite non-deterministic model behavior.

We are looking for a leader who can think clearly about systems, make strong technical decisions, and help build the engineering organization from the ground up. Be part of the founding team to shape the technical direction of the company, while helping build a strong engineering team across the globe.

Technical Direction

Engineering Leadership

Building the Team

Coordination and Execution

What You Will Need

We are particularly interested in candidates who enjoy building teams, superior products and shaping engineering organisations.

How We Work

The best products today in the world were built by small, world‑class teams. We are a high talent density and hands‑on team. We make decisions collectively, move at rapid speed, striking a balance between shipping high quality work and learning. Joining our team requires the ability to bring structure, exercise judgment, and execute independently. Our goal is to put in hands of our users a truly magical product.

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