Job Description

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