Senior Software Engineer - Shopify/FinTech Integrations

ZipRecruiter; City Of London; Hybrid; GBP 76,000 - 90,000; Full time

Job summary

A growing tech startup is looking for a Senior Software Engineer to enhance core systems and lead API integrations, specifically with Shopify. You will work with TypeScript and AWS in a hybrid setting, contributing to innovative projects that will impact millions. This role offers a competitive salary of up to £90k, a MacBook Pro, and a £600 wellbeing allowance.

Benefits

MacBook Pro

£600 annual wellbeing budget

Qualifications

• Strong experience with TypeScript on the backend.
• Confident managing complex API integrations, especially Shopify.
• Comfortable with React, Python, or similar technologies.

Responsibilities

• Build and enhance core systems that drive the customer experience.
• Lead API integration efforts, especially with Shopify.
• Improve platform performance, reliability, and scalability.

Skills

TypeScript backend experience

API integration management

React proficiency

Experience with AWS

Startup or scale-up background

Tools

TypeScript

Python

React

AWS

Job description

Overview

Senior Software Engineer – Shopify/FinTech Integrations

Full Stack (Backend-leaning | TypeScript)

London / Hybrid – 1 day per week in-office

Up to £90k DOE + MacBook Pro + £600 wellbeing allowance

Visa sponsorship not available

Join a VC-backed, fast-growing startup that’s redefining how customers shop for luxury fashion online. Backed by top-tier investors and trusted by household-name retailers in the UK and globally.

Following strong growth, they’re now expanding their high-impact tech team, and are looking for ambitious engineers to help scale their systems, drive innovation, and support global retail partnerships with seamless integrations.

What You’ll Do

• Build and enhance core systems that drive the customer experience
• Work across the stack, with a backend focus in TypeScript & AWS
• Lead API integration efforts, especially with Shopify
• Improve performance, reliability, and scalability of the platform
• Embrace AI tools to boost productivity and automate wherever possible

Tech Stack

• : TypeScript (core), Python/Ruby (data flow)
• Frontend: React ; Angular, Vue, or Node.js welcome
• Infrastructure: AWS
• Databases: Neo4j (nice to have)
• Integrations: Shopify

About You

• Strong experience with TypeScript on the backend
• Confident managing complex API integrations (Shopify a big plus)
• Comfortable with React, Python, or similar technologies
• Experienced in cloud-first environments (AWS)
• Background in startups or scale-ups
• Passionate about automation and leveraging AI in development

Bonus Points For

• Graph databases like Neo4j
• Experience with payment gateways or fraud detection systems
• Knowledge of MongoDB/Mongoose
• Familiarity with CATIA or other CAD system integrations
• Experience with A/B testing, analytics, and growth experiments

Why Apply?

• Work with iconic global fashion brands
• Join a lean, ambitious, collaborative product team
• Shape a product used by millions of shoppers
• Enjoy top-tier kit (MacBook Pro) + £600 annual wellbeing budget