Software Engineer

Gentrack; Greater London; Remote; GBP 70,000 - 110,000; 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

Remote-friendly environment

Job summary

Factor is seeking a Software Engineer in London to build the core of our energy platform, focusing on scalable data pipelines, pricing engines, and APIs for real-time decision making.

You will join a senior team with ownership, curiosity, and engineering excellence, using AI tools daily to accelerate impact.

Qualifications

• Proficiency in Node.js, Python, PostgreSQL, and AWS/serverless architectures.
• Experience designing and maintaining scalable data-heavy systems.
• Experience in the energy sector or data-heavy, mission-critical industries preferred.
• Able to work autonomously in a fast-moving startup with ownership.

Responsibilities

• Build and ship backend features with focus on scalability and reliability.
• Design and evolve Factor’s data and application architecture (TypeScript, Rust, AWS).
• Solve end-to-end data and API challenges from ingestion through to integration.
• Contribute to engineering standards, peer reviews, and design discussions to raise the bar.
• Leverage AI and automation to accelerate development, testing, and deployment.
• Foster a culture of technical excellence and ownership.

Skills

Node.js

Python

PostgreSQL

AWS

Serverless

System design

Autonomy

Ownership

Tools

TypeScript

Rust

Job description

Software Engineer

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