Principal Java Developer

Client Server; Greater London; Hybrid; GBP 40,000 - 70,000; Full time

Benefits offered by this job

Pension

Life Assurance

Income Protection

Private Medical Care

Mental Health Support

Travel Insurance

Gym Membership

Flexible Holiday Scheme

Job summary

Client Server in London offers a Principal Java Developer role in a hybrid setup. You will lead client projects, architect and implement cloud-enabled, scalable solutions in the financial services sector.

The ideal candidate has strong Java, Spring Boot, REST APIs, and AWS experience, plus DevOps/CI‑CD familiarity and excellent client-facing skills. Competitive package with comprehensive benefits is included.

Qualifications

• Experience in financial services or Fintech environments.
• Strong Java development skills with multi-threading and concurrency.
• Experience with Spring Boot and microservices environments.
• Good knowledge of REST APIs and AWS.
• Strong fundamentals in OOP, data structures and design patterns.
• Familiarity with DevOps and CI/CD pipelines.
• Collaborative with strong problem-solving and client interaction skills.

Responsibilities

• Lead client projects, including long-term technical transformations.
• Design, develop and deliver projects for clients in financial services.
• Migrate legacy systems to AWS and introduce CI/CD pipelines and cloud deployments.
• Work in a collaborative team focused on engineering best practices.
• Provide technical leadership and business/client-facing support.
• Operate in a hybrid setup from our London City office and client sites.

Skills

Java

Multi-threading

Spring Boot

REST APIs

AWS

OOP

Data Structures

Design Patterns

DevOps

CI/CD

Client Interaction

Tools

Spring

Spring Boot

AWS

CI/CD

Microservices

Job description

Salary: £40,000 - 70,000 per year

Requirements

• Experience within a financial services or Fintech environment
• Strong Java development skills, including multi-threading and concurrency
• Experience with Spring Boot and microservices environments
• Good knowledge of REST APIs
• Good understanding of AWS
• Thorough understanding of software development and Computer Science fundamentals such as Object Oriented Programming, Data Structures, and Design Patterns
• Familiarity with DevOps and CI/CD pipelines
• Collaborative approach with strong problem-solving and client interaction skills

Responsibilities

• Lead client projects, often long-term technical transformations
• Design, develop, and deliver a range of projects for our clients, mainly within the financial services sector
• Focus on migrating legacy systems to AWS and introducing CI/CD pipelines and cloud deployments
• Work within a collaborative team focused on engineering best practice and continuous improvement of client systems
• Provide technical expertise, leadership, and business/client-facing support
• Operate in a hybrid setup from our London City office and client sites

Technologies

• AWS
• CI/CD
• Cloud
• DevOps
• Support
• Java
• REST
• Spring
• Spring Boot
• microservices

More:

We are a global technology consultancy offering a Principal Java Developer / Software Engineer opportunity in London with hybrid working. Our team is friendly, diverse, and upbeat, with a strong focus on collaboration, engineering best practice, and continuous improvement. We offer a competitive salary of up to £120k along with a pension, life assurance, income protection, private medical care for you and your family including mental health support, travel insurance, charitable giving, gym membership for you and your family, and a flexible holiday scheme.

last updated 36 week of 2026