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Senior Back-End Developer – Fintech | London (Hybrid)
Build high-performance financial systems powering global transactions.
We’re partnering with a scaling fintech in London to hire a Senior Back-End Developer with deep experience building resilient, low-latency systems within regulated environments. If you enjoy designing high-throughput services and solving complex technical problems in payments/financial platforms, this is for you.
The Role
You’ll be responsible for building and optimising backend services that power real-time financial products. Your work will directly impact transaction speed, reliability, and platform scalability.
You will:
- Architect and build high-performance, event-driven services
- Develop secure, fault-tolerant APIs for transaction processing
- Optimise systems for latency, throughput, and concurrency
- Work with distributed systems, messaging queues, and microservices
- Implement and maintain KYC/AML, authentication, authorisation flows
- Collaborate across Product, DevOps, and SRE to scale infrastructure
- Uphold best practices around security, observability, and testing
Tech Stack (Experience with Most Required)
- Node.js / TypeScript or Java (ideal for high-scale fintech systems)
- Microservices architecture
- Kafka, RabbitMQ, SNS/SQS or similar messaging tools
- PostgreSQL, MySQL, Redis, NoSQL
- Containerisation with Docker & Kubernetes
- Cloud experience with AWS (Lambda, ECS, EKS, API Gateway, DynamoDB)
- Experience with OpenAPI/Swagger, CI/CD pipelines
- Strong understanding of security standards, encryption, compliance
Fintech Domain Experience (Required)
- Payments processing (cards, wallets, settlements, acquiring/issuing)
- Experience in regulated environments (FCA standards, PCI-DSS, GDPR)
- Understanding of risk, fraud, or transaction monitoring systems
- Familiarity with financial domain modelling and ledger systems
What We’re Looking For
An engineer who:
- Has 5–7+ years in backend engineering
- Can design systems that scale globally
- Thinks in terms of performance, reliability, and failure modes
- Is comfortable working in a fast-moving, product-led fintech environment
Interested?
Send me a message or reach out directly at [email protected] for full details.
Key Skills
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