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 admin@anchorconzult.com for full details.