Full Stack Engineer, Senior in London

Energy Jobline ZR; City Of London; Hybrid; GBP 70,000 - 90,000; Full time

Job summary

A mid-size fintech firm in London is seeking a Senior Fullstack Engineer with a focus on Python and GenAI. This role offers a hybrid working model, competitive salary, and a strong culture of innovation. The ideal candidate will showcase solid full-stack development experience and be able to apply GenAI strategies to enhance product outcomes. Join a team that values collaboration and professional growth.

Benefits

Highly Competitive Salary

Comprehensive benefits package

Professional growth opportunities

Qualifications

• Solid full-stack practitioner with experience working in GenAI environments.
• Proven ability to leverage AI for efficient product development.
• Examples of applied GenAI for improved outcomes.

Responsibilities

• Join a dynamic team focused on innovation.
• Leverage AI in the development process.
• Contribute to a collaborative environment.

Skills

Python

Full-stack development experience

GenAI utilisation in development

Tools

PostgreSQL

TypeScript

React

AWS

Docker

Job description

Job Description

Senior Fullstack Engineer (Python) | GenAI-Powered Fintech

We are looking for a Senior Fullstack Engineer whose primary focus is Python with a strong GenAI‑led engineering approach to join this highly profitable, mid‑size fintech in London that’s experiencing continuous growth.

The successful Snr Fullstack Engineer will join a dynamic team of engineers with an outstanding culture, competitive benefits, and a commitment to innovation. They offer a flexible hybrid working model and are deeply focused on leveraging AI to revolutionise their development process.

We’re looking for a solid, experienced full‑stack practitioner who can make a substantial impact across the platform.

Your Core Expertise:

• Python (Primary)
• Solid full‑stack development experience.
• Proven experience in environments where GenAI is utilised in the development workflow.

Full Tech Stack:

• Backend & Data: Python, PostgreSQL, BigQuery, MySQL
• Frontend: TypeScript, React, styled‑components
• Testing: Jest, React Testing Library, Cypress, pytest
• Cloud & Infra: AWS, GCP, ECS Fargate, Docker, Terraform, GitHub Actions

This is a unique opportunity for an engineer who understands what best practice looks like when working with AI assistance. While you won’t be building the GenAI models themselves, your engineering practice must be GenAI‑led. The client is looking for individuals who can demonstrate:

• Applied GenAI Examples: Concrete examples of how you’ve used applied GenAI in your product work to achieve better or faster outcomes.
• Paradigm Shift: A deep understanding of how to manage, edit, and iterate on code that is generated by AI agents.
• 'Good Looks Like': Insights into which available GenAI tools and workflows yield the best results for robust, maintainable full‑stack engineering.

What's on Offer

• Highly Competitive Salary and a comprehensive benefits package.
• Hybrid Working model based in London.
• A genuinely great culture—collaborative, empowering, and focused on professional growth.
• The chance to work at a highly profitable, growing bank that is setting the standard for technical excellence.

Apply now to learn more!

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