Java Developer with AWS

Square One Resources is hiring for a Senior Java Developer role focused on backend systems using Java and cloud technologies. The team works in an Agile/Scrum environment delivering scalable software solutions with microservices architecture and enterprise integration patterns.

• Minimum 4+ years of professional experience in Java development (Java 8–25)
• Strong knowledge of Java including multithreading, concurrency, immutability principles, and design patterns
• Experience with backend frameworks: Spring (Boot, MVC, WebFlux), MyBatis, TestContainers
• Experience with SQL and NoSQL databases (Oracle, PostgreSQL, MongoDB, Redis) and messaging systems (Apache Kafka)
• Understanding of software architecture: microservices, RESTful API design, SOA principles, containerization (Docker, Kubernetes), IAM/SSO solutions (Okta, CAS, IAM)
• Experience in software testing: unit testing (JUnit, Mockito), integration and acceptance testing (Spock), performance testing (JMeter, K6)
• Experience with version control and CI/CD tools: Git (Bitbucket, GitLab), Jenkins, GitLab CI/Pipelines
• Knowledge of application security principles (OWASP)
• Experience working in Agile/Scrum teams with Jira and Confluence
• Basic frontend understanding (HTML, CSS, JavaScript, Angular, React, Vue.js) is a plus
• Experience with Linux/Unix environments and scripting (Python, Bash)
• Cloud experience with AWS services: IAM, EC2, S3, Lambda, API Gateway, CloudWatch, MSK
• Ability to create technical and user documentation
• Understanding of DevOps practices and automation tools
• Good command of English (at least communicative level)

• Development and maintenance of backend applications in Java
• Technical consulting and advisory support for developers and business units
• Conducting code reviews and ensuring coding standards adherence
• Active participation in Agile/Scrum ceremonies (planning, refinement, retrospectives)
• Designing and implementing scalable software solutions based on microservices and REST architecture
• Creating and maintaining technical documentation in Confluence
• Task management and delivery tracking using Jira
• Supporting testing activities (unit, integration, and performance testing)
• Collaboration with frontend developers and QA engineers to ensure end-to-end quality delivery
• Contribution to continuous improvement of development processes and team efficiency