Backend Java Developer

1 week ago


Boston, Massachusetts, United States Hays Full time

Job Title: Java Backend Developer

LOCATION: BOSTON (PREFERRED), NYC

Onsite: Once per week

Summary:

We're seeking an experienced Senior Java Software Engineer to join our Workflow team, helping us build, scale, and extend our core platform and services. This role is ideal for a hands-on, backend-focused developer who thrives in designing and implementing high-performance, distributed systems and event-driven microservices.

The successful candidate will play a key role in the end-to-end design, implementation, and optimization of our backend systems, ensuring performance, scalability, and reliability at enterprise scale.

Key Responsibilities


• Design, develop, and enhance highly available, scalable backend services and APIs using Java and related technologies.


• Architect and implement microservices and distributed systems with a focus on performance, fault tolerance, and maintainability.


• Collaborate cross-functionally with product managers, QA engineers, and other development teams to translate business requirements into robust technical solutions.


• Implement event-driven architectures and asynchronous communication patterns (e.g., Kafka, RabbitMQ, or similar).


• Own services end-to-end, from design through deployment and monitoring, ensuring high reliability and quality standards.


• Participate in code reviews, design discussions, and architecture sessions, contributing to best practices and continuous improvement.


• Work with DevOps and CI/CD tools (e.g., Docker, Kubernetes, Jenkins, Ansible) to automate and streamline delivery.


• Maintain and optimize data access and storage using MongoDB or other NoSQL databases.


• Stay current with emerging backend technologies and bring innovative ideas to improve our system design and development practices.

Required Experience and Qualifications


• Bachelor's or Master's degree in Computer Science, Software Engineering, or a related discipline. (highly preferred)


• 6+ years of hands-on development experience with Java (Java 8 or higher) building complex backend systems.


• 8+ years of total software engineering experience in designing and building enterprise-grade applications.


• Proven experience in API development (RESTful and/or GraphQL) and microservice architecture.


• Deep understanding of object-oriented design principles, design patterns, and data structures.


• Strong experience with distributed systems, asynchronous processing, and event-based architectures.


• Hands-on experience working with MongoDB or other NoSQL databases at scale.


• Familiarity with containerization and orchestration technologies such as Docker and Kubernetes.


• Experience implementing CI/CD pipelines using tools like Jenkins, GitLab CI, or similar.


• Proficiency with build tools such as Maven or Gradle, and familiarity with testing frameworks (JUnit, Mockito, etc.).


• Excellent problem-solving skills, attention to detail, and ability to work independently with minimal supervision.


• Strong communication and collaboration skills with cross-functional teams.

Nice to Have


• Experience with frontend technologies such as ReactJS (helpful for end-to-end understanding, not mandatory).


• Exposure to cloud platforms (AWS, Azure, or GCP).


• Experience with monitoring and observability tools (e.g., Prometheus, Grafana, ELK Stack).


• Familiarity with domain-driven design (DDD), CQRS, or event sourcing concepts.


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