Senior Java Software Engineer

Experis Technology Group; Bristol; On-site; GBP 60,000 - 80,000; Full time

Job summary

A technology consulting firm is seeking a Senior Java Developer to join their expanding engineering team in Bristol. This role involves designing and delivering Java-based services for a data-intensive system, optimizing for performance and reliability. Candidates should have strong experience in backend systems, extensive knowledge of Java, distributed systems, and REST API design. This is an opportunity to work in a highly technical environment and mentor junior engineers.

Qualifications

• Strong experience building production back-end systems.
• Deep expertise in Java.
• Solid understanding of distributed systems and microservice design.

Responsibilities

• Develop and maintain Java-based microservices.
• Optimise services for throughput, reliability, and low latency.
• Design and maintain REST APIs for internal and external use.
• Collaborate on data models and integration patterns.

Skills

Java

Distributed systems

Microservice design

REST APIs

Data processing

Containerised deployments

Communication

Job description

Our client is expanding their engineering team and we’re supporting them in the search for a Senior Java Developer with strong experience in distributed systems, large‑scale data processing, and high‑performance microservices. This is an opportunity to join a highly technical environment working on an event‑driven platform that handles high‑volume, real‑time data.

The Role

You’ll play a key part in designing and delivering Java‑based services that power a complex, data‑intensive system. The ideal candidate enjoys solving distributed‑systems challenges, improving performance, and contributing to architectural decisions.

Key Responsibilities

• Develop and maintain Java‑based microservices
• Optimise services for throughput, reliability, and low latency
• Design and maintain REST APIs for internal and external use
• Collaborate with product and UI teams on data models and integration patterns
• Design relational data structures for high‑ingest workloads
• Write efficient SQL, schema migrations, and performance improvements
• Contribute to architecture, testing standards, observability, and code quality
• Mentor mid‑level and junior engineers
• (Optional) Support tooling, automation, or prototypes using Python

What We’re Looking For

• Strong experience building production back‑end systems
• Deep expertise in Java
• Solid understanding of distributed systems and microservice design
• Experience designing and implementing REST APIs
• Familiarity with Apache‑based data or messaging frameworks
• Experience with containerised deployments
• Clear communication and the ability to work cross‑functionally