Staff Software Engineer - Full Stack & AI Architect

Runna; Greater London; Hybrid; GBP 110,000 - 131,000; Full time

Benefits offered by this job

Flexible working – 3 days a week in Vx

25 days holiday + bank holidays

Runna & Strava subscriptions for you +

Private health insurance

Pension

Mental wellness resources

Fertility and family care support

Parental leave

Job summary

Runna is building the #1 training platform for runners in London. We’re hiring a Staff Software Engineer (Full Stack) to provide architectural direction across multiple squads and drive engineering excellence in a fast‑paced, mission‑driven environment.

You’ll mentor engineers, define scalable solutions, champion AI in our SDLC, and own end‑to‑end delivery from design to production across mobile and backend systems while strengthening our release processes and engineering culture.

Qualifications

• 6+ years in software engineering with leadership
• Experience shipping production features across mobile and backend
• Hands-on with AI in engineering workflows and code reviews
• Experience shipping LLm-backed or AI-enhanced features
• Familiarity with AWS serverless, containers, and IaC tooling
• Strong communication and mentoring capabilities

Responsibilities

• Define architectural direction across multiple product teams
• Champion AI adoption across the SDLC and tooling
• Own end-to-end delivery from design to release across full stack
• Mentor engineers and support team growth
• Collaborate with Product, Design and Leads to balance speed and quality
• Own release processes and enable autonomous shipping
• Foster ownership and continuous improvement in the team
• Maintain scalable, secure, and maintainable systems

Skills

TypeScript/JavaScript

AI in software engineering

Full stack leadership

Mentoring engineers

System design

Release engineering

Tools

AWS (Serverless)

ECS/EKS

Terraform

CDK/CloudFormation

AppSync

GitHub Actions

Job description

Runna is building the #1 training platform for runners in London. We’re hiring a Staff Software Engineer (Full Stack) to provide architectural direction across multiple squads and drive engineering excellence in a fast‑paced, mission‑driven environment.

You’ll mentor engineers, define scalable solutions, champion AI in our SDLC, and own end‑to‑end delivery from design to production across mobile and backend systems while strengthening our release processes and engineering culture.