Java Engineer

Solirius Ltd.; Greater London; On-site; GBP 70,000 - 110,000; Full time

Benefits offered by this job

Competitive Salary

Bonus Scheme

Private Healthcare Insurance

25 Days Annual Leave + Bank Holidays

Up to 10 days allocated for training

Enhanced Parental Leave

Paid Fertility Leave (5 Days)

Statutory & Contributory Pension

EAP with Help@Hand

Gym Membership Benefits

Cycle to Work and EV schemes

Flexible Working

Annual Away Days/Company Socials

Job summary

Solirius Ltd. is seeking a Senior Java Engineer to join our engineering team in the UK. You will design, develop and maintain scalable Java applications with a focus on cloud-native microservices and modern software practices. AI-enabled capabilities are highly desirable as we explore advanced solutions.

You will collaborate with cross-functional teams, mentor engineers and contribute to architectural decisions while delivering high-quality, secure software in an agile environment.

Qualifications

• Strong proficiency in Java (Java 12+ preferred).
• Experience with Spring Boot and microservices architecture.
• Solid understanding of REST APIs, distributed systems and event-driven design.
• Experience with relational databases (PostgreSQL/MySQL/Oracle).
• Proficient with cloud platforms (AWS/Azure/GC).
• Familiar with Docker, Kubernetes and CI/CD workflows.

Responsibilities

• Design, develop, test, and maintain enterprise-grade Java applications.
• Contribute to architectural decisions and technical design discussions.
• Develop scalable microservices and RESTful APIs.
• Collaborate with Product, QA, DevOps and stakeholders.
• Review code, mentor engineers and promote best practices.
• Optimize performance, reliability and security of apps.
• Participate in Agile ceremonies and CI/CD implementations.
• Troubleshoot production issues and implement durable solutions.
• Explore and adopt emerging technologies to boost capabilities.

Skills

Java

Spring Boot

REST APIs

Distributed systems

Event-driven architectures

Cloud platforms

CI/CD practices

Software design patterns

Tools

Docker

Kubernetes

CI/CD tools

Jenkins/GitHub Actions

Job description

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 Senior 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.

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.

• 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)
• Statutory & Contributory Pension
• EAP with Help@Hand
• Gym Membership Benefits
• Cycle to Work and Electric Vehicle schemes
• Flexible Working
• Annual Away Days/Company Socials

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.