Backend Engineer - Fintech API & AI Neobank (Hybrid, UK)

Doit; Greater London; Hybrid; GBP 70,000 - 110,000; Full time

Job summary

Doit is looking for Backend Engineers to build the core systems behind our AI-powered Neobank platform. You will design and implement reliable APIs, onboarding and payments workflows, and scalable financial product infrastructure used across markets and millions of users.

You will own reliability, security, latency and data integrity, integrate with partners and internal services, and collaborate with product, frontend, mobile and AI teams to ship features quickly and safely.

Qualifications

• Good understanding of APIs, databases, authentication, authorization, queues, jobs, events and integrations.
• Experience building services used by real customers or internal operations at meaningful scale.
• Strong debugging, reliability, security and data quality mindset.
• Able to make practical trade-offs between speed, correctness, scalability and maintainability.
• Fintech, payments, banking, wallet, KYC, fraud or risk experience is a strong plus, but not required if fundamentals are strong.

Responsibilities

• Build backend services and APIs for onboarding, accounts, payments, cards, transfers, rewards, travel, FX, KYC and risk flows.
• Design reliable systems that can support real customer transactions, operational workflows and future financial products.
• Integrate with internal systems, financial partners, payment providers, AI services and third-party platforms.
• Own backend quality across reliability, security, latency, observability, data integrity and incident handling.
• Work with product, frontend, mobile and AI teams to launch features quickly and safely.
• Improve existing systems by simplifying flows, removing manual work and automating repeatable processes.

Skills

APIs

Databases

Authentication

Authorization

Queues

Jobs

Events

Integrations

Debugging

Reliability

Security

Data quality

Trade-offs

Fintech

Job description

Doit is looking for Backend Engineers to build the core systems behind our AI-powered Neobank platform. You will design and implement reliable APIs, onboarding and payments workflows, and scalable financial product infrastructure used across markets and millions of users.

You will own reliability, security, latency and data integrity, integrate with partners and internal services, and collaborate with product, frontend, mobile and AI teams to ship features quickly and safely.