Middle Full Stack Engineer (Java+JS)

About the role

As a Full-stack Engineer, you will build and maintain web applications for our Client, a large European public institution, working across the front-end, back-end services, the data layer, and their deployment in the cloud.

Responsibilities

• Development of front-end website architecture
• Design of user interactions on web pages.
• Development of back-end website applications
• Implement core business logic
• Apply data and security best practices: input validation, authentication/authorization, secure storage, compliant logging and monitoring
• Ensure web applications are optimized for performance and functionality across different browsers and devices
• Design responsive applications
• Design and develop APIs
• Participating in the design and creation of scalable software
• Maintenance of code integrity and organization
• Writing clean, functional code on the front- and back-end
• Compile and analyze data, processes, and codes to troubleshoot problems and identify areas for improvement
• Perform unit/integration testing, debug, fix, and validate code changes
• Deliver solutions that fulfil functional and non-functional requirements and align with user expectations
• Write technical documentation
• Develop and maintain features across the entire stack, from designing user interfaces and consuming APIs to implementing server-side business logic and database interactions
• Deploy and manage applications on cloud platforms using CI/CD pipelines and containerization technologies
• Bridge the gap between front-end and back-end developers, facilitating communication and ensuring cohesive integration of all system components
• Draft precise technical specs for AI agents (e.g., Kiro) to generate boilerplate code (Angular services, Spring Boot controllers), test cases (Karma, JUnit) or Oracle PL/SQL scripts
• Review and refine AI outputs for correctness (logic, edge cases), compliance (security, coding standards) and performance
• Document AI contributions (e.g., code comments, ADRs) and train teams on prompt engineering

Requirements

• University degree corresponding to Level 7 of the European Qualifications Framework (which typically corresponds to a master’s level or 5 years of higher education), and minimum 5 years of IT professional experience
• Very good knowledge of English, both spoken and written, corresponding to Level B2
• Proficiency with fundamental front-end languages (JavaScript, HTML, CSS) and experience with frameworks/libraries including Vaadin 7, Angular, React, Vue, and Bootstrap
• Expertise in Java 8/17 and back-end stacks (Java/Node/PHP), including JEE (EJB 3, CDI, JMS), Spring Boot, and Hibernate JPA.
• Advanced experience in designing, building, and securing RESTful APIs and web services using Kafka, Protobuf, JAX-WS, JAXB, and OpenAPI/Swagger documentation.
• Proficiency with Oracle Database, PostgreSQL, and MongoDB, including schema design, query optimization, and version control with Flyway
• Strong understanding of application servers, specifically Weblogic 12c and 14
• Experience with modern build and dependency management tools such as Maven, Webpack, and Vite
• Solid background in automated testing and related tooling, e.g., JUnit 4 and Mockito
• Expert knowledge of Git workflows (GitFlow, trunk-based) using GitLab and Bitbucket, with an understanding of legacy systems using SVN
• Knowledge of cloud services (AWS, Azure) and experience with IaC tools such as Terraform, AWS CloudFormation, or Azure Bicep for environment provisioning
• Understanding of containerization and orchestration technologies (Docker, Kubernetes) for application deployment
• Deep knowledge of authentication and authorization protocols and standards (e.g., OAuth 2.0, OpenID Connect, JWT)
• Proven experience working within Agile methodologies and using JIRA for task and project management
• Ability to write clear, structured technical specifications for AI code agents (e.g., Kiro, GitHub Copilot)
• Awareness of AI limitations (e.g., hallucinations, bias, licensing risks) and mitigation strategies
• Experience integrating AI tools into software development workflows (e.g., coding, PR reviews, documentation, CI/CD)

SoftServe is an equal opportunity employer. Qualified applicants will receive consideration regardless of race, color, ancestry, ethnicity, national origin, religion, sex, sexual orientation, gender identity or expression, age, citizenship, disability, health condition, marital or family status, veteran status, or any other characteristic protected by applicable law.