Software Engineer

Gentrack Ltd (Global); Greater London; Hybrid; GBP 70,000 - 120,000; Full time

Benefits offered by this job

Competitive salary

Private medical insurance

Life and income protection

24-days annual leave

Enhanced parental leave

Tailored learning and development

Flexible working hours and remote-work

Job summary

Factor is seeking an engineer to lead backend development of scalable data pipelines, pricing engines, and APIs that support real-time decisions for energy retailers and customers. You will join a senior team that values ownership, curiosity, and engineering excellence, with AI tools used daily to multiply impact and velocity.

You’ll work on designing core systems in TypeScript, Rust, and AWS, delivering robust data processing and thoughtful interfaces that scale globally.

Qualifications

• 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 data-heavy, mission-critical industries is valued.
• Able to work autonomously in a fast-moving startup with ownership and initiative.
• Strong collaborative mindset with low ego and high responsibility.
• Excited to apply skills to the energy transition.

Responsibilities

• Build and ship backend features and services with emphasis on scalability, performance, and resilience.
• Design and evolve Factor’s data and application architecture (TypeScript, Rust, AWS, etc.).
• Solve end-to-end problems across the stack, from data ingestion to APIs and integrations.
• Contribute to engineering standards, peer reviews, and design discussions to raise the technical bar.
• Leverage AI and automation to accelerate development, testing, and deployment.
• Help shape a culture of technical excellence, collaboration, and ownership.

Skills

Node.js

Python

PostgreSQL

Cloud architecture

Tools

TypeScript

Rust

AWS

Job description

Department

Factor

Employment Type

Permanent - Full Time

Location

London, UK

Description

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.

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.

Your 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.

What We’re Looking For

• 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.

What We Can Offer You

• 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