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About the Role
As a senior 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 team where engineering excellence is expected and AI tools are used daily to multiply impact and velocity.
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.
Requirements
- 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.
Skills
- Node.js
- Python
- PostgreSQL
- AWS
- Serverless
- Typescript
- Rust
Location
- London, UK
Work Type
- Permanent
- Full Time
- Remote
- Flexible working hours
Experience Level
- Senior
Salary/Compensations
- Competitive salary
Benefits
- Private medical insurance
- Life and income protection
- 24-days annual leave
- Enhanced parental leave
- Tailored learning and development opportunities
About the 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.