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Solirius Reply

Java Engineer

London
Level
Mid

Not stated in the posting: salary, work type, visa.

Open. First seen 3 October 2026.

Apply on the company's site →

About the role

Solirius Reply's standard text

About Us:

Solirius Reply, part of the Reply Group, is a technology consultancy and digital transformation partner that helps organisations solve complex challenges through strategy, design, engineering, and delivery.

We work closely with our clients to deliver secure, accessible, user-focused services that evolve with their needs. By combining deep technical expertise with people-centred design, we create solutions that deliver meaningful, lasting impact.

Our consultants partner directly with client teams, embedding into organisations to understand their goals, challenges, and users. This collaborative approach enables us to deliver tailored solutions that drive measurable outcomes across public and private sectors.

Past and present clients include the Ministry of Justice, Department for Education, Ministry of Housing, Communities and Local Government, UEFA, International Olympic Committee, and Mercedes-Benz. Our services span the full digital delivery lifecycle, including architecture, engineering, delivery management, user-centred design, business analysis, data, DevOps, and AI.

We operate as a collaborative and inclusive organisation that empowers our people to take ownership, innovate, and develop their expertise. As an equal opportunities employer, we are committed to encouraging equality, diversity, and social mobility, while creating opportunities for our teams to work on meaningful projects that deliver lasting impact.

About You:

You are a motivated and adaptable professional with a strong analytical mindset and a passion for using technology to solve real-world problems. You enjoy working in collaborative, agile teams and take pride in delivering high-quality solutions that make a tangible impact. With strong communication skills and a consultative approach, you’re comfortable engaging with clients, understanding their needs, and translating them into effective outcomes.

The Role:

We are seeking an experienced Java Engineer to join our engineering team and play a key role in designing, developing, and maintaining scalable, high-performance applications. The ideal candidate will have strong expertise in Java-based enterprise systems, cloud-native development, and modern software engineering practices. Experience with Artificial Intelligence (AI) technologies and AI-enabled applications is highly desirable.

Requirements

Key Responsibilities:

  • Design, develop, test, and maintain enterprise-grade Java applications.
  • Assist with technical design discussions and contribute to architectural decisions.
  • Develop scalable microservices and RESTful APIs.
  • Collaborate with cross-functional teams including Product, QA, DevOps, and Business stakeholders.
  • Review code, mentor engineers, and promote engineering best practices.
  • Optimise application performance, reliability, and security.
  • Participate in Agile ceremonies including sprint planning, stand-ups, and retrospectives.
  • Troubleshoot production issues and implement sustainable solutions.
  • Contribute to CI/CD pipelines and cloud deployment strategies.
  • Evaluate and adopt emerging technologies that improve product capabilities and development efficiency.

Key Skills/Experience:

You need to be technically sound but also be able to convey your knowledge and expertise to clients internally and externally. In terms of specific languages you should have commercial experience in some or all of the following;

  • Strong proficiency in Java (Java 12+ preferred).
  • Experience with Spring Boot, Spring Framework, and microservices architecture.
  • Strong understanding of REST APIs, distributed systems, and event-driven architectures.
  • Experience with relational databases such as PostgreSQL, MySQL, or Oracle.
  • Experience with cloud platforms such as AWS, Azure, or Google Cloud Platform.
  • Familiarity with containerisation technologies including Docker and Kubernetes.
  • Experience with CI/CD tools and automated testing frameworks.
  • Strong knowledge of software design patterns, data structures, and system design principles.

Desirable Skills

  • Experience building or integrating AI-powered applications and services.
  • Familiarity with Large Language Models (LLMs), Generative AI, Retrieval-Augmented Generation (RAG), AI agents, or machine learning workflows.
  • Experience integrating AI APIs and platforms such as OpenAI, Anthropic, Azure AI, or similar technologies.
  • Knowledge of vector databases, embeddings, prompt engineering, and AI application architecture.
  • Experience with Python for AI/ML-related development.
  • Exposure to MLOps practices and AI model deployment pipelines.
  • Contributions to open-source projects or technical communities.

Benefits

  • Competitive Salary
  • Bonus Scheme
  • Private Healthcare Insurance
  • 25 Days Annual Leave + Bank Holidays
  • Up to 10 days allocated for development training per year
  • Enhanced Parental Leave
  • Paid Fertility Leave (5 Days)
  • Contributory Pension
  • EAP with Help@Hand
  • Gym Membership Benefits
  • Flexible Benefits Allowance
  • Cycle to Work and Electric Vehicle schemes
  • Flexible Working
  • Annual Away Days/Company Socials
Solirius Reply's standard text

Diversity and Inclusion

As an equal opportunities employer, we are committed to creating a work environment that supports, celebrates, encourages and respects all individuals, where all processes are based on merit, competence and business needs.

Encouraging high social mobility is really important to us. We foster an inclusive culture by welcoming different perspectives, enabling equitable opportunities and promoting open dialogue. This commitment is reflected in initiatives such as our gender diversity group and our focus on mental health and wellbeing. Whatever stage you are at, you will find an environment where you can thrive.

Should you require further assistance or require any reasonable adjustments to be put in place to better support your application process, please do not hesitate to raise this with us.

As a Disability Confident employer, we are committed to ensuring our recruitment process is accessible and inclusive, enabling all candidates to demonstrate their skills, experience and potential.

What this role asks for

Particular to this role

Generative AI · LLM · MLOps · MySQL · Oracle · Prompt Engineering · RAG · Spring

Rare in Solirius Reply's other 30 open postings.

Standard for backend roles

AWS · Java · Kubernetes · PostgreSQL · Python

Common in backend postings at any company.

In most of Solirius Reply's ads

Agile · Azure

Named in most of its open postings, whatever the role.

49% of this description is written for the role. The rest is Solirius Reply's standard text, folded away below.

Read against Solirius Reply's other open postings on this site.

The team: Software Engineering HIRES STEADILY

This role is one of 14 open in Software Engineering. 3 were posted in the last 30 days and the oldest in October: a team that hires all year rather than one being built.

WHAT THE TEAM WORKS WITH, ACROSS ITS POSTINGS

AWS (11 of 14), Azure (11 of 14), GCP (11 of 14), Agile (10 of 14), Docker (10 of 14), Python (10 of 14), SQL (9 of 14)

OTHER ROLES ON THIS TEAM

From the team and dates on Solirius Reply's own job board.

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