Staff Engineer Java Spring Boot AWS

Client Server Ltd.; Greater London; Hybrid; GBP 100,000 - 120,000; Full time

Job summary

Client Server Ltd. in London is seeking an experienced Staff Engineer to own technical direction, lead projects and work directly with clients on complex transformation programs, primarily in financial services.

You will design and deliver scalable Java applications using Spring Boot and microservices, migrate legacy systems to AWS, and enhance CI/CD and cloud deployment practices. You will combine hands-on engineering with technical leadership, problem solving and client engagement within a

Qualifications

• Experience in financial services/Fintech environments.
• 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.
• Solid fundamentals in CS: OOP, data structures, design patterns.
• Familiar with DevOps and CI/CD pipelines.
• Collaborative, problem-solving and client-facing.

Responsibilities

• Leading technical projects and client engagements from design through to delivery.
• Developing scalable Java applications using Spring Boot and microservices.
• Modernising and migrating legacy systems to AWS.
• Designing and working with REST APIs and distributed systems.
• Introducing and improving CI/CD and DevOps practices.
• Providing technical expertise and guidance to clients and engineering teams.

Skills

Java

Spring Boot

AWS

REST APIs

Microservices

DevOps CI/CD

Multi-threading

OOP

Data Structures

Design Patterns

Job description

London, Greater London | £100k - £120k per year

Staff Engineer / Principal Software Developer (Java Spring Boot AWS) London / WFH to £120k

Are you an experienced Staff Engineer who enjoys taking technical ownership, leading projects and working directly with clients?

You could be progressing your career at a global technology consultancy, working on complex, long-term transformation projects, primarily within the financial services sector.

As a Staff Engineer, you'll lead the design and delivery of high impact technology projects, helping clients modernise legacy systems, migrate to AWS and introduce modern CI/CD and cloud deployment practices. You'll combine hands-on engineering with technical leadership, problem solving and client engagement.

You'll work alongside a highly collaborative team focused on engineering excellence, continuous improvement and delivering meaningful outcomes for clients.

What you'll be doing:

• Leading technical projects and client engagements from design through to delivery
• Developing scalable Java applications using Spring Boot and microservices
• Modernising and migrating legacy systems to AWS
• Designing and working with REST APIs and distributed systems
• Introducing and improving CI/CD and DevOps practices
• Providing technical expertise and guidance to clients and engineering teams

Location / WFH:

There's a hybrid work from home policy with three days a week in the London, City office (or at client sites), you'll join a friendly, diverse, upbeat team.

About you:

• You have experience within a financial services or Fintech environment
• You have strong Java development skills including multi-threading and concurrency
• You have experience with Spring Boot and microservices environments
• You have a good knowledge of REST APIs
• You have a good understanding of AWS
• You have a thorough understanding of software development and Computer Science fundamentals such as Object Oriented Programming, Data Structures and Design Patterns
• You are familiar with DevOps, CI/CD pipelines
• You're collaborative, enjoy problem solving and interacting with clients

What's in it for you:

As a Staff Engineer / Principal Software Developer you will earn a highly competitive package:

• Salary to £120k
• Pension, Life Assurance, Income Protection
• Private medical care for you and your family, including mental health
• Travel Insurance
• Charitable giving
• Gym membership for you and your family