Senior Java Engineer

hireful; Greater London; Hybrid; GBP 120,000 - 125,000; Full time

Job summary

Global technology & software product company in London is seeking a Senior Java Engineer to join the Platform Team. You will design and build distributed services in core Java, work with Kafka event streaming, and orchestrate deployments on Kubernetes within a hybrid working setup.

The role offers a salary of £120,000 to £125,000 basic with an extensive benefits package and 2 days in the office per week.

Qualifications

• 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.

Responsibilities

• 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.

Skills

Java backend

Core Java

Concurrency

Event Streaming

Kafka

JVM Tuning

Tools

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 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. This is an excellent opportunity to join a highly-skilled team of Software Engineers, who value technical coding ability, ownership & delivery - no client work, no consultancy, no "Project management" of software - just pure, coding ability with Java, Data & complex, distributed global software systems required!

Location: London (Old Street / Shoreditch). Salary: £120,000 to £125,000 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.