Senior Full-Stack Engineer - FinTech Card Payments (Hybrid)

iwoca; Greater London; Hybrid; GBP 80,000 - 90,000; Full time

Benefits offered by this job

Flexible hours

Medical insurance

Private GP

25 days holiday

Birthday day off

Sabbatical after 4 years

Counselling support

Pension contributions

Equity incentive

Parental leave

Nursery benefit

Company retreats

Learning budget

Job summary

iwoca in London is seeking a Senior Full-Stack Engineer to work on our business credit card stack. You’ll own features end-to-end—from data models and APIs to frontend interfaces built with React and TypeScript.

You’ll collaborate with product and design, ship frequently, and learn the card payments domain. The role blends backend Python services with frontend work, including mobile components in React Native.

Qualifications

• Backend services built with Python and well-tested design.
• Relational data models and APIs designed and integrated.
• Frontend experience with React and TypeScript to ship customer features.
• Product ownership from idea to production and post-live improvements.
• Ability to leverage AI responsibly to scale engineering output.
• Clear communication of technical details to varied audiences.

Responsibilities

• Ownership of features from data model to API, testing, release, and monitoring.
• Impact: empower business owners with cashback, spend controls, and card safety.
• Variation: work across Python services, React web, and React Native mobile.
• Card domain learning: understand card transactions and payments platform.
• AI-first approach: build with AI tools and review specs before implementation.

Skills

Backend engineering

Data models

APIs

Frontend

Product ownership

AI leverage

Communication

Tools

Python

FastAPI

PostgreSQL

React

TypeScript

React Native

Job description

iwoca in London is seeking a Senior Full-Stack Engineer to work on our business credit card stack. You’ll own features end-to-end—from data models and APIs to frontend interfaces built with React and TypeScript.

You’ll collaborate with product and design, ship frequently, and learn the card payments domain. The role blends backend Python services with frontend work, including mobile components in React Native.