Tech Lead: AI-Driven Systems Architect & Mentor

Thirdfort; Greater London; On-site; GBP 90,000 - 130,000; Full time

Job summary

Jobtailor in London seeks a technically senior leader to guide design and architecture across production systems. You will drive end-to-end ownership from discovery to operation, champion AI-assisted engineering and elevate code quality and observability.

You will mentor engineers, shape platform direction, and collaborate with Product and Design to balance trade-offs in a fast-moving, regulated environment.

Qualifications

• Significant experience building and operating production software in a modern engineering environment.
• Experience leading technical design and delivery for complex systems or domains.
• Comfortable working across backend and frontend systems, including Go, TypeScript, JavaScript, and Python.
• Strong knowledge of APIs, data modelling, testing strategies, and system design.
• Active use of AI-assisted engineering tools in the development workflow.
• Experience demonstrating how AI-assisted tools improve software design, development, testing, or maintenance.
• Experience with Go, TypeScript, React, React Native, Temporal, PostgreSQL, GCP, and AI-assisted engineering tools, depending on the team
• Ability to mentor engineers and lead through influence rather than authority
• Ability to communicate complex technical ideas clearly to technical and non-technical stakeholders
• Comfortable working in a fast-moving, regulated environment where quality and trust are critical

Responsibilities

• Provide technical leadership within the team and domain, guiding design decisions and architectural direction
• Design, build, and deliver secure, scalable, and maintainable complex features and systems
• Own technical outcomes end-to-end, from discovery and design through delivery and long-term operation
• Lead by example in AI-assisted software engineering while maintaining engineering judgment and accountability
• Improve AI-enabled development practices and automate repetitive engineering work
• Represent Engineering at an organisational level and partner with Product, Sales, Marketing, Support, Operations, Legal, and Compliance
• Mentor and coach engineers, supporting their technical growth and confidence
• Set standards for code quality, testing, observability, and operational excellence
• Collaborate with Product and Design to shape solutions, challenge assumptions, and manage trade-offs
• Lead technical discussions, reviews, and incident investigations
• Contribute to wider engineering initiatives and influence technology-organisation standards

Skills

Technical Leadership

AI-Assisted Engineering Tools

Go Programming

TypeScript Development

System Design

React

Python

APIs

Data Modelling

Testing Strategies

PostgreSQL

React Native

GCP

Temporal

Tools

GCP

React Native

Temporal

AI-Assisted Engineering Tools

Job description

Jobtailor in London seeks a technically senior leader to guide design and architecture across production systems. You will drive end-to-end ownership from discovery to operation, champion AI-assisted engineering and elevate code quality and observability.

You will mentor engineers, shape platform direction, and collaborate with Product and Design to balance trade-offs in a fast-moving, regulated environment.