Software Engineer

Factor; Greater London; Hybrid; GBP 90,000 - 130,000; Full time

Benefits offered by this job

Private medical insurance

Life and income protection

24 days annual leave

Enhanced parental leave

Learning and development opportunities

Flexible working hours and remote-work

Job summary

Factor seeks an engineer to help build the core of its platform in London. You will ship backend features with a focus on elegance, scalability, and resilience, and design data and application architecture using TypeScript, Rust and AWS.

You will work in a senior team with ownership culture, applying AI tools daily to boost velocity and impact. Remote-work opportunities and flexible hours are offered as part of a dynamic startup environment.

Qualifications

• Proficiency in Node.js, Python, PostgreSQL and modern cloud architecture (AWS, serverless).
• Track record designing clean, maintainable systems handling complex data and business logic.
• Energy sector experience valued; comfortable in a fast-moving startup with ownership.

Responsibilities

• Build backend features and services with emphasis on scalability, performance, and resilience.
• Design and evolve Factor’s core data and application architecture (TypeScript, Rust, AWS).
• Solve end-to-end problems from data ingestion and transformation to APIs and integrations.
• Contribute to engineering standards, peer reviews, and design discussions.
• Use AI to accelerate development cycles, testing and deployment.

Skills

Node.js

Python

PostgreSQL

AWS

Serverless

APIs

Tools

TypeScript

Rust

AWS

Job description

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.

Department

Factor

Location

London, UK

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