Senior Integration Architect – Java, AWS, Financial Services (Outside IR35)

About the role

Integration Architect / Senior Integration Architect – Java and AWS – will work on a greenfield bank project, delivering integration architecture across Accounts, Payments and FX. The role focuses on evolving the target integration model and ensuring seamless connectivity across core systems, on‑site in London Bridge for four days a week.

Key responsibilities

• Own and evolve integration architecture aligned with enterprise standards.
• Define and govern integration patterns across teams.
• Design and deliver event‑driven, API‑first, and messaging solutions (NATS, REST).
• Lead end‑to‑end integration delivery, including hands‑on development (Java/Spring).
• Ensure scalable, cloud‑native solutions on AWS.
• Produce architecture artefacts such as blueprints, contracts and ADRs.
• Guide teams on best practices, API governance and event design.
• Engage stakeholders and align cross‑team integration efforts.

Required profile

• 15+ years of technology experience with strong integration architecture background.
• Proven delivery of complex integrations in financial services.
• Hands‑on contributor with strong stakeholder communication.
• Experience across domains such as RTL, Payments or FX preferred.

Required skills

• Event‑driven architecture and messaging systems (NATS, pub/sub, async patterns).
• API‑first design and integration patterns (REST, gRPC).
• Java/Spring Boot and microservices architecture.
• Cloud‑native integration on AWS (ECS/EKS, SQS/SNS, API Gateway).