Back End Developer

Lorien; Leeds; Hybrid; GBP 65,000 - 85,000; Full time

Job summary

A leading technology firm is seeking a Senior Developer to join their US Product Development team in Leeds. This role focuses on backend development, mentoring engineers, and shaping the technology stack. Ideal candidates will have 5+ years in Java development, expertise in Spring Framework, and a strong mentoring ability. This position values collaboration, simplicity, and continuous learning, contributing to innovative retail systems for sports betting technology. Onsite presence is required for one day a week.

Qualifications

• 5+ years of professional Java development experience.
• Deep expertise in Spring Framework and microservices architecture.
• Proven ability to mentor and develop engineering talent.
• Strong background in messaging systems (Kafka, RabbitMQ).
• Proficiency with AWS, Docker, SQL/NoSQL, and automated testing.
• Experience in Agile environments with a DevOps mindset.

Responsibilities

• Design and build Java microservices using modern Java and Spring Framework.
• Architect scalable, fault-tolerant, high-performance systems.
• Lead initiatives to improve code quality and enhance CI/CD pipelines.
• Mentor junior and mid-level developers.
• Collaborate across teams and time zones to deliver impactful solutions.

Skills

Java development

Spring Framework

Microservices architecture

Mentorship

Messaging systems (Kafka, RabbitMQ)

AWS

Docker

SQL/NoSQL

Automated testing

Agile methodology

Education

Degree in Computer Science or related field

Job description

Location: Leeds ( 1- day onsite per week)

Duration: 6 Months

Description

About the Role

Join our US Product Development team, where we build innovative retail systems for Sportsbooks and hotel check-in kiosks across the US. As a senior developer, you’ll lead backend development, mentor engineers, and shape the future of our technology stack. We’re looking for a collaborative, results‑driven professional who values simplicity, ownership, and continuous learning.

Key Responsibilities

Technical Leadership

• Design and build Java microservices using modern Java and Spring Framework
• Architect scalable, fault-tolerant, high-performance systems
• Lead initiatives to improve code quality, reduce technical debt, and enhance CI/CD pipelines
• Promote functional programming and internal open-source practices
• Mentor junior and mid-level developers, fostering a culture of growth and excellence
• Facilitate team debugging and problem‑solving sessions

Strategic Impact

• Influence architecture and technical direction across the team
• Write clean, maintainable code that supports long‑term scalability and team contributions
• Define and uphold development standards and best practices
• Lead and participate in production support, including on‑call rotation
• Work closely with QA to ensure high-quality software delivery
• Contribute to a culture of continuous improvement and innovation
• Collaborate across teams and time zones to deliver impactful solutions
• Help drive the evolution of next‑generation sports betting technology

What You’ll Bring

Experience

• 5+ years of professional Java development experience
• Deep expertise in Spring Framework and microservices architecture
• Proven ability to mentor and develop engineering talent
• Strong background in messaging systems (Kafka, RabbitMQ)
• Proficiency with AWS, Docker, SQL/NoSQL, and automated testing
• Experience in Agile environments with a DevOps mindset

Mindset & Skills

• Ownership mentality with a focus on delivering customer value
• Strategic thinker with a bias for action and simplicity
• Passionate about learning, teaching, and raising the bar
• Comfortable working flexibly to support US‑based teams
• Strong communicator and effective collaborator across disciplines

Bonus Points

• Degree in Computer Science or related field
• Experience with Python, TypeScript, Scala, or GraphQL
• Familiarity with advanced AWS services and hardware interfaces