Principal Software Engineer - Energy Platform & AI Systems

Joulen

Belfast City District

Hybrid

GBP 120,000 - 180,000

Full time

12 days ago

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Benefits offered by this job

22 days annual leave plus 11 holidays
Option to buy additional annual leave
Pension
Life Assurance
Private Medical Insurance

Job summary

Joulen in Belfast is seeking a Principal Software Engineer to act as the senior technical authority across product domains, shaping design principles, delivery strategy and operational standards while remaining hands-on.

You will mentor other engineers, advance trunk-based development, and govern AI-driven systems, with ownership of production reliability and collaboration with Head of Engineering to scale Joulen's energy-market platform.

Qualifications

  • Demonstrable, hands-on XP: TDD, DDD, pair and mob programming, refactoring
  • Track record of defining CD strategy with trunk-based development and feature flags
  • Experience setting design principles, test strategy, and operational standards across multiple systems

Responsibilities

  • Be the technical authority for your product domain and align engineering with product propositions
  • Set standards to keep systems simple, tested, and safe to change at scale
  • Shape continuous delivery and release strategy for frequent production deployments
  • Own production reliability and govern AI in production software
  • Design team interaction models and establish code ownership and review norms
  • Grow senior engineers and influence hiring
  • Collaborate with leaders to communicate up to board level

Skills

Technical leadership
Hands-on coding
TDD/XP
System architecture
AI in production
SDLC governance
Team Topologies
Hiring & mentoring
Energy markets domain knowledge

Tools

Git
CI/CD
Observability tools

Job description

Joulen in Belfast is seeking a Principal Software Engineer to act as the senior technical authority across product domains, shaping design principles, delivery strategy and operational standards while remaining hands-on.

You will mentor other engineers, advance trunk-based development, and govern AI-driven systems, with ownership of production reliability and collaboration with Head of Engineering to scale Joulen's energy-market platform.

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