We're looking for a

Software Engineer

The role
Team:
Engineering
Reporting to:
Chief Technology Officer
Employment type:
Full time
Location:
UK
Applications close:
n/a
Overview

As an engineer, you will play a pivotal role in developing the core of our system: scalable data pipelines, pricing engines, and APIs that support real-time decision making for energy retailers and their customers. You’ll work in a highly capable senior team, where ownership, curiosity, and engineering excellence are expected — and where AI tools are used daily to multiply impact and velocity.

Key responsibilities
  • Build and ship backend features and services with a focus on elegance, scalability, performance, and resilience.
  • Design and evolve Factor’s core data and application architecture (Typescript rust, AWS, etc).
  • Solve complex, end-to-end problems across the stack, from data ingestion and transformation, complex algorithms, through to APIs and partner integrations
  • Contribute to engineering standards, peer reviews, and design discussions that raise the technical bar.
  • Use AI and automation to accelerate development cycles, testing, and deployment.
  • Help shape a culture of technical excellence, collaboration, and high ownership.
Experience, knowledge and working style
  • Proficiency in Node.js, Python, PostgreSQL, and modern cloud architecture (AWS, serverless).
  • Track record of designing and maintaining clean, maintainable systems that handle complex data and business logic.
  • Experience in the energy sector (or other data-heavy, mission-critical industries) is highly valued.
  • Comfortable working autonomously in a fast-moving startup environment; proactive in surfacing problems and proposing solutions.
  • Thrives on responsibility and ownership, with a low-ego, high-collaboration style.
  • Excited by the opportunity to apply your skills to one of the world’s biggest challenges: the energy transition.
Benefits
  • Competitive salary
  • Private medical insurance
  • Life and income protection
  • 24-days annual leave
  • Enhanced parental leave
  • Tailored learning and development opportunities
  • Flexible working hours and remote-work opportunities
About Factor
Our company

Factor is an API driven, AI powered retail data platform for global energy utilities. We use deep machine learning to help energy retailers accurately value the energy they sell: improving margins, unlocking more competitive customer products, and driving lower carbon emissions. We believe that great environmental outcomes come from smarter commercial models, and we earn our clients’ loyalty by helping them do good and do well.

We are a small, senior team that moves fast by collaborating, not following rulebooks. Headquartered in New Zealand, we’re building a global business; working remotely, flexibly, and across time zones to support our partners and clients.

Factor was acquired by Gentrack Group Ltd in May 2026. We operate as a division inside the Group, collaborating with our Gentrack colleagues to win new business and support Group customers. We also sell Factor independently, integrating with other software in the energy ecosystem.

At Factor, we're building the commercialisation layer for the new energy economy. Our engineers don't just write code. They shape the foundations of a platform designed to transform how energy is priced, forecast, and delivered globally.

Our culture

We're a small team from energy, software, and commercial backgrounds who care about getting the details right. We move at pace without sacrificing accuracy, keep customers in control of their own work, and make complex things straightforward. The problems are genuinely hard, which attracts people who want to do their best work on something that matters.

How we work
Amp it up
Lead from the front. Your energy defines the team’s tempo. Raise expectations and challenge others to keep up.
Own it, solve it
Take full accountability for outcomes, good and bad. Bring solutions, not excuses.
Set the pace
Attack problems with focus and urgency. Be relentless in pursuing solutions and opportunities.
Obsess over results
Focus on meaningful, measurable outcomes. Avoid distractions. Everything is about impact.
Be radically clear
Communicate directly, with no sugar–coating or ambiguity. Say what needs to be said, even when it’s uncomfortable.
Deliver together
Collaboration isn’t an end, it’s a means to achieving big results. Act with shared purpose while driving accountability individually.