Back End Developer

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.