Senior Fullstack Engineer

Jack and Jill AI; Greater London; On-site; GBP 70,000 - 90,000; Full time

Job summary

A high-growth UK Fintech Bank is seeking a Senior Fullstack Engineer to join their payments squad. In this role, you will have the chance to design and engineer large-scale systems that ensure seamless and secure transactions for customers. You’ll work within a mature DevOps culture, taking ownership of the payments infrastructure while leveraging innovative GenAI tools. Ideal candidates will have 5+ years of experience with Python or TypeScript and a strong grasp of cloud technologies like AWS and GCP. This position offers a chance to make a significant impact.

Qualifications

• 5+ years of experience designing and engineering large-scale systems with Python or TypeScript.
• Strong background in cloud-native technologies including AWS, GCP, and Terraform.
• Values simple designs, mentorship, and business impact over complex code.

Responsibilities

• Engineer and scale payment journeys from transaction initiation to backend scheme connections.
• Collaborate in cross-functional squads to solve complex user problems using TDD and continuous deployment.
• Leverage GenAI tools to increase productivity and enhance technical decision-making processes.

Skills

Python

TypeScript

Cloud-native technologies

Mentorship

Tools

AWS

GCP

Terraform

Job description

Senior Fullstack Engineer

Company Description: High-growth UK Fintech Bank

Job Description: Join a high-impact payments squad responsible for the end-to-end transaction journey within a personal savings mission. You will design and engineer large-scale systems across web and mobile frontends to complex backend processing, including fraud and AML checks. This role focuses on delivering seamless, secure money movement for hundreds of thousands of customers while leveraging cutting-edge GenAI tools.

Location: London, UK

Why this role is remarkable

• Take end-to-end ownership of the payments infrastructure within a multi-billion dollar scale fintech environment
• Work in a mature DevOps culture where you have the autonomy to build, run, and scale your own features
• Join a mission-driven organization that has supported thousands of homes and jobs while transforming personal savings

What you will do

• Engineer and scale payment journeys from transaction initiation to backend scheme connections
• Collaborate in cross-functional squads to solve complex user problems using TDD and continuous deployment
• Leverage GenAI tools to increase productivity and enhance technical decision-making processes

The ideal candidate

• Has 5+ years of experience designing and engineering large-scale systems with Python or TypeScript
• Demonstrates a strong background in cloud-native technologies including AWS, GCP, and Terraform
• Values simple designs, mentorship, and business impact over complex code for its own sake