Java Fullstack Developer

Mastek; Leeds; On-site; GBP 70,000 - 95,000; Full time

Job summary

Mastek is seeking a Senior Java Developer for a Banking & Financial Services project in Leeds. You will design, develop and deliver cloud-native applications, champion best practices in security, DevOps, and software design, and mentor team members.

The role emphasizes AWS services, Java/Kotlin expertise, and collaboration with cross-functional teams. The candidate should be proficient in AWS security, CI/CD, and relational/NoSQL databases, with strong SQL skills and experience with Node.js and

Qualifications

• Cloud-native AWS architecture experience with security in mind.

Responsibilities

• Design, develop, and deliver cloud-native applications in AWS for BFSI clients.
• Provide technical guidance and contribute to architectural decisions.
• Mentor and support team members; promote best practices in development, security and DevOps.
• Work with cross-functional teams in a cloud-first environment.

Skills

Java/Kotlin

SQL

Cloud fundamentals

DevOps practices

Education

BSc/BA in a relevant field

Tools

AWS S3

AWS Glue

Lambda

DynamoDB

OpenSearch

CloudFormation

API Gateway

ECS

CloudWatch

Node.js

TypeScript

SQL

GitHub Actions

Job description

Senior Java Developer – Banking & Financial Services | Leeds, UK | SC Clearance Eligible

Are you a passionate Senior Java Developer looking to make an impact within the Banking & Financial Services sector? We're partnering with a leading BFSI client to find an experienced engineer who thrives in a collaborative, cloud-first, DevOps environment and enjoys building secure, scalable, and high-performing solutions.

The Role

As a Senior Developer, you will play a key role in designing, developing, and delivering cloud-native applications while working closely with cross-functional teams. You'll be expected to provide technical guidance, contribute to architectural decisions, and champion best practices across development, security, and DevOps.

We're looking for someone with a growth mindset, excellent communication skills, and a passion for mentoring and supporting team members.

Strong experience with, or a solid understanding of:

• Amazon S3
• AWS Glue
• Lambda
• DynamoDB
• OpenSearch
• CloudFormation
• API Gateway
• ECS
• CloudWatch
• Strong proficiency in Java/Kotlin
• Experience with Node.js and TypeScript
• Advanced SQL skills
• Strong understanding of software engineering best practices and design patterns
• Experience working with relational databases using SQL
• Knowledge of NoSQL databases, particularly DynamoDB

Strong understanding of AWS security best practices, including:

• Role-Based Access Control (RBAC)
• Principle of Least Privilege
• Secure handling of sensitive data, tokens, and credentials
• Experience building and maintaining CI/CD pipelines
• Strong knowledge of Git and GitHub Actions