Senior Full Stack Engineer

SQE; Remote; GBP 70,000 - 90,000; Full time

Job summary

A modern energy supply firm in the UK seeks an experienced backend engineer to build and evolve resilient backend services for trading, billing, and reconciliation systems. Candidates should have over 8 years of experience, particularly in complex systems, with strong expertise in JavaScript, TypeScript, and various data technologies including Postgres and AWS. This role offers opportunities to work on scalable systems and make impactful contributions to a rapidly evolving platform.

Qualifications

• 8+ years of backend engineering experience in complex systems.
• Experience with data warehousing or distributed systems.
• Calm, pragmatic approach to systems design.

Responsibilities

• Architect and build backend systems in JS and TypeScript.
• Manage data flows between Postgres, Redshift, and analytics layers.
• Design APIs for frontend and external integrations.

Skills

Backend engineering

Data warehousing

Systems design

DevOps practices

Tools

Postgres

AWS

TypeScript

Node.js

Redshift

DBT

Power BI

Jupiter Notebook

Job description

The role in a sentence

Build and evolve the backend services that power SQE’s trading, billing and reconciliation systems — ensuring the core of the platform is fast, reliable and scalable.

About SQE

SQE is rebuilding the energy supply business from the ground up for large industrial and commercial users. We connect big buyers directly with independent generators — unlocking contracts that manage risk, reward flexibility, and deliver a modern enterprise-grade experience.

Our engineers have already built the hard stuff : a modern trading engine, best-in-class billing and reconciliation systems, and the backbone for flexibility and MCE. Now we’re integrating everything — bringing polish, usability, and performance to match the technical depth beneath.

What you’ll make possible

• Resilient, modular backend services that scale with our customers.
• Data models and APIs that underpin trading, billing, and analytics.
• Core logic that fuses technical precision with commercial insight.

How will you do it :

• Architect and build backend systems in JS and TypeScript.
• Manage data flows between Postgres, Redshift, and analytics layers.
• Design APIs for frontend and external integrations.
• Balance speed and quality — building for the long term.

The stack

• React
• TypeScript
• Node.js
• Postgres
• AWS
• Redshift
• DBT
• Power BI
• Jupiter Notebook

You’ll bring

• 8+ years of backend engineering experience in complex systems.
• Experience with data warehousing or distributed systems.
• Experience with brown field, refactoring.
• A calm, pragmatic and simple approach to systems design.
• DevOps experience is a plus (from monitoring with DataDog & Cloudwatch to Terraform and code pipelines).

Contract / Permanent available

Preferably within European time zones.