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.

Work arrangement
Yes