Backend Java Developer at Monks

Please note that we will never request payment or bank account information at any stage of the recruitment process. As we continue to grow our teams, we urge you to be cautious of fraudulent job postings or recruitment activities that misuse our company name and information. Please protect your personal information during any recruitment process. While Monks may contact potential candidates via LinkedIn, all applications must be submitted through our official website (monks.com/careers). About the Role As a Backend Developer, you’ll be the engine behind our server-side logic, building and optimising the robust infrastructure that powers our digital experiences. Working with a diverse range of business applications, you will ensure high performance and seamless integration across the stack. We are looking for someone who is passionate about seeking new opportunities to create impactful work through scalable and efficient Java-based solutions. Responsibilities: • Develop and maintain high-performance server-side logic using Java to ensure application reliability. • Collaborate with front-end developers, data analysts, and stakeholders to integrate user-facing elements. • Design and implement standardized APIs and RESTful services. • Manage database lifecycle, including setup, maintenance, and performance optimization. • Identify and resolve complex bugs and performance bottlenecks. • Write clean, scalable, and efficient code following Java best practices and modern patterns. • Participate in code reviews and cross-functional collaboration with QA, DevOps, and Product teams. • Document technical specifications and API processes to maintain a comprehensive development knowledge base. About You The essentials: • Dutch citizenship and proficiency in the Dutch language. • Educational background: A Bachelor’s degree in Computer Science, IT, or a related field (or equivalent professional experience). • Java Mastery: Proven experience with core Java (OOP, concurrency, JVM internals) and modern features like Streams, Lambda expressions, and Optional. • Framework Expertise: Strong hands-on experience with Spring Boot, Spring MVC, Spring Data, or Hibernate/JPA. • Data & API Proficiency: Skilled in RESTful API design and database technologies (SQL Server, PostgreSQL, or NoSQL like MongoDB). • Tools & Process: Experience with version control (Git), build tools (Maven/Gradle), and working within Agile/SDLC methodologies. • Security & Quality: Solid understanding of security principles (OWASP, JWT, OAuth2) and testing frameworks like JUnit or Mockito. Not a must, but a plus: • Familiarity with Cloud platforms (AWS, Azure, or GCP) and microservices architecture. • Experience with Containerization (Docker, Kubernetes) and CI/CD pipelines. • Knowledge of Message Brokers (RabbitMQ, Kafka) or performance profiling tools. • Secondary proficiency in other languages (Python, C#, or TypeScript) or front-end technologies (ReactJS). At Monks, we believe in fostering an environment where a diversity of perspectives can thrive. We proactively work to design hiring processes that promote equity and inclusion while mitigating bias. We celebrate diversity and are committed to building a team that reflects the communities we serve. We welcome and encourage qualified applicants, from all backgrounds, who are excited to contribute to our mission. #LI-FP1 About Monks Monks is the global, digital-first, data-driven, unitary operating brand of S4 Capital plc. With a legacy of innovation and specialized expertise, Monks combines an extraordinary range of global Marketing and Technology Services to redefine how brands interact with the world. Through Monks.Flow, its flagship AI ecosystem for marketing orchestration, Monks transforms marketing into a growth engine, collapsing timelines and connecting brands to culture in real time. By deploying bespoke intelligent agents across disciplines and delivering culturally relevant, high-impact creative and digital solutions, Monks solves key critical business challenges across the entire brand enterprise to help brands sustain long-term impact. Monks was named a Contender in The Forrester Wave™: Global Marketing Services, ranks among Cannes Lions' Top 10 Creative Companies (2022-25) and remains the only partner featured in AdExchanger’s Programmatic Power Players list every year (2020-24). Named Adweek’s first AI Agency of the Year (2023) and The One Show’s inaugural AI Pioneer Organization, Monks was also awarded Business Intelligence Group’s 2025 Excellence in Artificial Intelligence Award in both the Organizational and AI Product categories. As a trusted partner to cutting-edge innovators in tech, Monks earned titles such as Optimizely Experimentation Partner of the Year (2025), runner-up for the Adobe Firefly Partner Award (2024), and Workato’s AI Visionary Customer Impact Award (2024). Additionally, Monks achieved a record-breaking number of FWAs and continues to hold the most of any partner. We are an equal-opportunity employer committed to building a respectful and empowering work environment for all people to freely express themselves amongst colleagues who embrace diversity in all respects. Including fresh voices and unique points of view in all aspects of our business not only creates an environment where we can all grow and thrive but also increases our potential to produce work that better represents—and resonates with—the world around us.