Senior Backend Engineer — Payments Platform

Opulent Mind; City Of London; Hybrid; GBP 70,000 - 90,000; Full time

Job summary

Opulent Mind is seeking a Senior Backend Engineer to join a dynamic fintech team in London. In this role, you will design and build core services that accurately manage money transactions amidst complex financial scenarios. The successful candidate will have experience in backend systems and a deep understanding of fintech.

As part of a small team, you will have real ownership and the opportunity to grow into a technical leadership role. A background in payments or trading is preferred, allowing you to contribute significantly to the platform’s evolution.

Qualifications

• 5+ years shipping production backend systems.
• Experience in fintech, payments, banking, or trading preferred.
• Ability to design clean and simple solutions.

Responsibilities

• Design and ship core services for money transactions.
• Apply allocation rules and reconciliation logic.
• Make engineering decisions on simplicity and testability.
• Define integration of AI agents into the platform.

Skills

Production backend systems experience

Understanding of fintech and payments

Clean design solutions

Autonomy in ambiguous situations

Tools

TypeScript

Vue

TailwindUI

Job description

Opulent Mind is seeking a Senior Backend Engineer to join a dynamic fintech team in London. In this role, you will design and build core services that accurately manage money transactions amidst complex financial scenarios. The successful candidate will have experience in backend systems and a deep understanding of fintech.

As part of a small team, you will have real ownership and the opportunity to grow into a technical leadership role. A background in payments or trading is preferred, allowing you to contribute significantly to the platform’s evolution.