Senior Java Developer

hireful; City Of London; Hybrid; GBP 90,000 - 110,000; Full time

Benefits offered by this job

Health insurance

Pension

Life assurance

Dental

Job summary

Global observability and monitoring software company seeks a Senior Java Software Engineer to join its Platform Team in London. You will design and build distributed Java services, focusing on core Java and high-throughput data processing.

You’ll work with Kafka, Kubernetes, and modern streaming tools to scale data pipelines and analytics for customers worldwide. The role offers a hybrid working model in London, with offices in Old Street/Shoreditch, and a competitive £90K-£110K salary plus

Qualifications

• 7+ years of backend Java development experience.
• Deep understanding of core Java, data structures and concurrency.
• Hands-on experience with Kafka and streaming frameworks such as Kafka Streams / Flink / Spark.
• Practical Kubernetes experience, including troubleshooting production issues.
• Experience tuning JVM performance (GC, CPU hotspots, heap dumps).

Responsibilities

• Design and build distributed services from the ground up in Java.
• Develop event-driven systems using Kafka at scale.
• Orchestrate deployments on Kubernetes and define service stateful sets.
• Tackle data consistency and availability challenges across the platform.
• Mentor engineers and collaborate with a global team.

Skills

Core Java

Distributed systems

Concurrency

Event-driven design

JVM tuning

Tools

Kafka

Kafka Streams

Flink

Spark

Kubernetes

Job description

Global technology & software product company operating in the observability and monitoring space, is looking for a Senior Java Software Engineer to join their Platform Team in London. You'll help build the distributed services that sit at the core of their product, ingesting and transforming data at scale so it can power a range of analytics and monitoring tools used by customers around the world.

Location: London (Old Street / Shoreditch). Salary: £90K - £110K basic, plus an extensive benefits package. Working arrangement: hybrid, ideally 2 days per week in the office, with flexibility considered.

What you’ll be doing

• Design and build distributed services from the ground up, working with core Java rather than solely relying on heavy framework usage.
• Develop event-driven systems using Kafka and event-streaming frameworks at scale
• Orchestrate deployments on Kubernetes, defining services, deployments and stateful sets
• Tackle hard problems around data consistency and availability, and shape how the platform evolves
• Mentor other engineers while continuing to learn from senior peers across a global team

What you need to bring

• At least 7 years' experience as a backend Java developer, building complex distributed systems
• A deep understanding of core Java, data structures and concurrency, not just framework knowledge
• Hands-on experience with Kafka and event-streaming frameworks such as Flink, Kafka Streams or Spark
• Practical Kubernetes experience, including troubleshooting production issues
• Experience tuning JVM performance - garbage collection, CPU hotspots and heap dump analysis

Why you’ll love this job

• Genuine ownership - you’ll take on your own piece of the product within 90 days, backed by a supportive team
• A strong learning culture, with a structured onboarding plan and an ambitious L&D policy behind you
• An extensive benefits package covering health, dental, pension, life assurance and more

If you’re a backend-focused Java engineer who enjoys solving hard distributed systems problems and wants to work on technology used at global scale, we’d love to hear from you. Apply today to find out more about this opportunity.