Staff Java Architect: AI-Driven Platform at Scale (Remote)

Duetto; Greater London; Remote; GBP 102,000 - 153,000; Full time

Job summary

Duetto is seeking a Staff Software Engineer on the Dev Platform team to own the Java/Spring monolith architecture, drive domain decomposition, and lead platform modernisation for a high-throughput, multi-tenant system.

You’ll shape event-driven data flows with AWS Kinesis, SQS/SNS, and Spring Cloud Stream, improve backend services, and advance observability and AI-assisted development across US and European teams.

Qualifications

• 7+ years building production backend systems at scale.
• Deep expertise in Java — Spring Framework, Gradle, and JVM performance tuning.
• Production experience with event-driven architectures — AWS Kinesis, Kafka, or equivalent.
• AWS production experience across EKS/ECS, S3, SQS/SNS, and IAM.
• A demonstrated track record of driving architecture decisions and authoring design docs without formal authority.

Responsibilities

• Own the architecture and technical roadmap of Duetto's Java/Spring monolith — drive domain decomposition and platform modernization.
• Design and build event-driven data flows using AWS Kinesis, SQS/SNS, and Spring Cloud Stream; enhance GraphQL/API layers and backend services.
• Operate and tune MongoDB, Redis, and PostgreSQL for high throughput in a multi-tenant environment; strengthen observability with OpenTelemetry and Datadog.
• Pioneer AI-augmented engineering workflows using Claude Code, Claude MPM, and MCP tooling across US and EU teams.
• Drive architecture decisions through design docs and RFCs; establish patterns for schema evolution and observability.
• Mentor engineers across US and EU teams to raise code quality and technical standards.

Skills

Backend engineering

Java

Spring Framework

Gradle

JVM tuning

Event-driven architecture

AWS

Kinesis

Kafka

Design docs

Code reviews

Tools

MongoDB

Redis

PostgreSQL

OpenTelemetry

Datadog

Prometheus

Grafana

Sentry

Claude Code

Claude MPM

MCP server tools

Job description

Duetto is seeking a Staff Software Engineer on the Dev Platform team to own the Java/Spring monolith architecture, drive domain decomposition, and lead platform modernisation for a high-throughput, multi-tenant system.

You’ll shape event-driven data flows with AWS Kinesis, SQS/SNS, and Spring Cloud Stream, improve backend services, and advance observability and AI-assisted development across US and European teams.