Senior Java Backend Developer in St Albans

MrQ - we're an awesome, award winning online casino launched in 2018. We're big on tech, big on performance and most of all - big on fun. Over the years, we have experienced explosive growth - which means we need more rock stars to join our quest for total world domination. We are looking for an awesome Senior Java Backend Developer to join our PQ tribe - the team responsible for building and evolving the internal systems that power player management, reporting, compliance, and operations across the entire business. The role is a hybrid based one in the UK (St Albans), Malta, or Gibraltar.

What You Will Do

• Design, build, and maintain PQ, our internal back‑office platform used for player management, reporting, flags, triggers, and operational workflows.
• Develop backend services in a continuous delivery environment, using Java, Spring, and modern open‑source technologies.
• Work with event‑driven and distributed systems, ensuring correctness, idempotency, and reliability across services.
• Own complex domains such as player accounts, account statuses, events, triggers, flags, reporting, and internal tooling.
• Collaborate closely with product managers, designers, data teams, compliance, and operations, translating real business needs into scalable technical solutions.
• Integrate with internal and third‑party systems, including messaging platforms, data pipelines, and external APIs.
• Contribute to architectural decisions and help shape the future direction of PQ, a system that is constantly evolving.
• Be an active voice in engineering culture – mentoring others, sharing knowledge, and raising the bar for code quality and system design.

What We're Looking For

• A strong team player with excellent communication and collaboration skills that demonstrates critical thinking and problem‑solving abilities, and able to manage their time.
• Demonstrated strength in system design, including the ability to design end‑to‑end solutions, reason about trade‑offs, and evolve existing systems to handle scale, reliability, and changing business requirements.
• 5+ years of in-depth practical experience with Java and Spring.
• Knowledge of other JVM‑based languages, especially Kotlin, is a plus.
• Solid understanding of web application architecture and microservices.
• Strong grasp and professional experience with concurrent programming, concepts of idempotency and distributed transaction management in application logic.
• Familiarity with the technologies in our stack, including Kafka, Redis, and Kubernetes.
• Practical experience with MongoDB would be considered a big advantage.
• Knowledge of AngularJS is a plus.
• Passion in the eyes and swiftness in the fingers ;)

What We Offer

• Enjoy a competitive salary package that recognises your hard work and dedication.
• Need some extra time off? We've got you covered with additional leave days, and we believe in celebrating life's special moments, including your birthday, with dedicated birthday leave.
• Family matters to us, too, which is why we offer a generous four‑week parental leave.
• Your well‑being is our priority, supported by international health and life insurance.
• Stay motivated with wellness incentives and seize opportunities for personal and professional growth with our growth allowance.
• Embrace a flexible working environment that caters to your needs, and join our friendly and multinational team, where collaboration and camaraderie flourish.
• At MrQ, we're committed to ensuring that your experience with us goes beyond just a job – it's a fulfilling journey with a supportive community.
• We are committed to fostering a workplace that values and celebrates diversity. We welcome individuals of all backgrounds and experiences, and we believe that a diverse and inclusive environment leads to innovation and success.
• We actively promote equal opportunities for all employees and strive to create a space where everyone's voices are heard and respected.

Join us in our journey to build a truly inclusive workplace where every person can thrive and contribute to our collective success.