Senior Java Developer

Madfish; United Kingdom; Remote; GBP 100,000 - 125,000; Full time

Job summary

A leading software development firm in the United Kingdom seeks a Senior Java Developer to enhance and build high-performance web applications. This role involves collaboration with various teams, including frontend developers and product managers, ensuring robust backend services using Java and related technologies. Candidates should have at least 5 years of experience in software development, particularly in Java and Spring Boot. The company offers competitive salaries, a supportive culture, and various employee benefits.

Benefits

Competitive salary

21 days of annual leave + 6 days of sick leave

Birthday and work anniversary gifts

Half-day off on your birthday

Qualifications

• 5+ years of hands-on experience with Java and Spring Boot.
• Strong knowledge of RESTful API design and microservices.
• Experience with RDBMS, especially PostgreSQL.
• Hands-on experience with Apache Kafka and CI/CD pipelines.

Responsibilities

• Design and develop backend services and APIs using Java.
• Collaborate with frontend teams for end-to-end solutions.
• Participate in system design and architecture discussions.
• Ensure code quality through testing and reviews.

Skills

Java

Spring Boot

RESTful API design

PostgreSQL

Apache Kafka

Docker

AWS

Git

Maven/Gradle

CI/CD pipelines

Tools

Docker Swarm

Kubernetes

Prometheus

Grafana

OpenTelemetry

ELK stack

Sentry

Job description

We are looking for a Senior Java Developer to join our growing development team. You’ll play a key role in building and enhancing scalable, high-performance web applications. Working closely with cross‑functional teams including frontend developers, UX/UI designers, QA engineers, and product managers, you’ll be deeply involved in the entire software development lifecycle—from concept to deployment.

Key Responsibilities

• Design, develop, and maintain high‑quality backend services and APIs using Java (preferably Java 17+), Spring Boot, and related technologies.
• Collaborate with frontend developers working with modern frameworks such as React.js and TypeScript to deliver seamless end‑to‑end solutions.
• Participate in system design and architecture discussions, driving improvements in structure and performance.
• Ensure code quality through test‑driven development, peer code reviews, and continuous integration practices.
• Optimize applications for maximum speed and scalability.
• Contribute to the improvement of internal development processes and tooling.
• Troubleshoot and debug complex issues across the stack.

Requirements

• 5+ years of hands‑on experience with Java (Spring Boot, Spring Data, Hibernate/JPA).
• Solid knowledge of RESTful API design and microservices architecture.
• Strong experience with RDBMS (especially PostgreSQL), including writing SQL functions, stored procedures, and triggers using PL/pgSQL.
• Solid hands‑on experience with Apache Kafka, including working with Kafka Connect, Schema Registry, and Kafka Streams.
• Understanding of CI/CD pipelines and agile development methodologies.
• Experience with tools like Docker, Git, and Maven/Gradle.
• Experience working with AWS in a production environment.
• Excellent problem‑solving and communication skills.
• Ability to work both independently and collaboratively in a team environment.
• Strong collaboration skills with cross‑functional teams (e.g., product, design, DevOps).
• Passion for clean code, performance optimization, and continuous learning.

Preferred Qualifications

• Experience with container orchestration tools, Docker Swarm (current) and Kubernetes (target platform).
• Familiarity with observability tools (e.g., Prometheus, Grafana, OpenTelemetry, ELK stack, Sentry) for monitoring and tracing in production.
• Experience mentoring junior developers and supporting team knowledge‑sharing.
• Ability to lead technical discussions, conduct architecture reviews, and guide design decisions.

What We Offer

• Competitive salary based on your qualifications and experience.
• A fantastic opportunity to develop and build a successful career with a fast‑growing global company.
• Join a workplace where team activities and a supportive environment are at the heart of our culture.
• 21 days of annual leave + 6 days of sick leave.
• Birthday and work anniversary gifts.
• Half‑day off on your birthday to relax and enjoy your special day.