Integration Architect
London - Hybrid (4 days office Mandatory)
Fixed Term Contract - 1 Year
£85,000pa - £120,000pa
My client is looking for an Integration Architect with Hands-on experience ideally within a Banking Domain. Event driven Architecture, either Hands-on KAFKA or NATS
Hands on Integration Architect, driving real-time Ledger (RTL), Payments, and FX systems integration within a large banking platform.
Deep integration expertise + cloud-native mindset
Strong communicator and technical leader
Familiar with AI-assisted development tools
NATS experience is required (Kafka/Pulsar accepted)
Key Responsibilities:
Define and own target-state integration architecture aligned with enterprise standards
Lead end-to-end integration delivery across multiple systems and teams
Design event-driven, API-first, cloud-native solutions (NATS, REST, async messaging)
Create architecture artefacts (blueprints, APIs, ADRs)
Act as integration authority across platforms and stakeholders
Mentor teams on integration patterns, API governance, and best practices
Drive use of AI tools to improve development efficiency
Tech Stack
Integration: Event-driven architecture, NATS (or Kafka/Pulsar), messaging patterns
Backend: Java, Spring Boot, microservices, REST/gRPC
Cloud: AWS (EKS/ECS, SQS/SNS, API Gateway, Terraform)
API: OpenAPI/AsyncAPI, versioning, governance
Frontend: React/TypeScript (working knowledge)
Domain Expertise (any of these)
Real-Time Ledger (accounting, event sourcing)
Payments (SWIFT, ISO 20022, settlement)
FX (trade lifecycle, rates, positions)
Risk/Limit Management
Client onboarding (KYC, account setup)
Experience Required
15+ years in tech, 5+ years in integration architecture
Proven delivery in large-scale financial/fintech systems
Strong hands-on + stakeholder management capability
Experience leading multi-team integrations
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