Senior Java Engineer

iO Associates; Hatfield (MA); Hybrid; USD 122,000 - 176,000; Full time

Job summary

iO Associates is seeking a Senior/Lead Software Engineer (Java) for a hybrid role with 2 days onsite in central London. You will lead design, development and support of cloud-native backend services and microservices architectures.

The role emphasizes high-performance systems, event-driven solutions, and mentoring engineers across the SDLC. Requirements include Java with Spring Boot, Kafka for event-driven designs, PostgreSQL/Couchbase in production, and cloud experience (Azure) plus

Qualifications

• Extensive commercial experience developing enterprise applications with Java and Spring Boot.

Responsibilities

• Lead design, development and support of scalable, cloud-native backend applications.
• Own full lifecycle of software in an Agile, DevOps environment.

Skills

Java

Microservices

Event-driven

Mentoring

Tools

Spring Boot

Kafka

PostgreSQL

Couchbase

Azure

Docker

Kubernetes

CI/CD

Job description

Senior / Lead Software Engineer (Java) | Outside IR35 | Hybrid (2 Days Onsite in central London)

Our client urgently seeks an experienced Senior Software Engineer with extensive Java expertise to take a lead role in the design,development and support of scalable, cloud-native backend applications.

Working within an Agile, DevOps environment, you’ll help build high-performance microservices, APIs and event-driven solutions powering a next-generation platform used at significant scale. This is an exciting greenfield programme, working alongside engineers, operations and product teams to deliver software that supports critical business operations.

• Extensive commercial experience developing enterprise applications with Java and Spring Boot
• Proven track record designing and delivering high-throughput, distributed microservices at scale
• Strong experience building event-driven architectures using Kafka
• Expertise with PostgreSQL and Couchbase in production environments
• Strong cloud experience with Azure, alongside Docker, Kubernetes and CI/CD pipelines
• Experience designing, optimising and supporting mission-critical, cloud-native systems
• Strong understanding of software design principles, scalable architecture and system performance
• Experience working in Agile, DevOps environments with ownership of software throughout the full development lifecycle
• Previous experience mentoring engineers and driving engineering best practices

-Hybrid – 2 days per week onsite
-Outside IR35
-6 Months initial contract – Greenfield programme with long-term potential