Lead Full Stack Engineer (Java+JS) in Katowice

About The Role In this role, you will work as a Lead Full-Stack Java Engineer on large-scale enterprise systems supporting grants and external expert management within a European public‑sector environment. You will combine hands‑on full‑stack development with technical leadership, ensuring that the team follows architecture, coding, quality, security, and delivery standards across complex distributed systems and cloud‑based environments.

About The Role In this role, you will work as a Lead Full-Stack Java Engineer on large-scale enterprise systems supporting grants and external expert management within a European public‑sector environment. You will combine hands‑on full‑stack development with technical leadership, ensuring that the team follows architecture, coding, quality, security, and delivery standards across complex distributed systems and cloud‑based environments.

Responsibilities

Develop and maintain front‑end and back‑end applications

Design responsive user interfaces, APIs, business logic, and database integrations

Build and secure RESTful APIs and web services

Apply security best practices for validation, authentication, authorization, storage, logging, and monitoring

Perform unit and integration testing, debugging, and production issue resolution

Deploy and manage applications using AWS, CI/CD pipelines, Docker, and Kubernetes

Maintain code quality, technical documentation, and scalable architecture

Lead technical delivery and ensure adherence to design, coding, quality, and architecture principles

Guide developers, review technical solutions, and support alignment across cross‑functional teams

Contribute to large‑scale Agile delivery and continuous improvement practices

Requirements

Master’s-level university degree or equivalent with 15+ years of professional IT experience

Strong technical leadership experience as a Senior/Lead Developer or Architect

Advanced knowledge of Java 19/21/25, Node.js, and PHP backend stacks

Strong experience with Spring Boot, Spring Framework, Spring Cloud, Hibernate JPA, and REST APIs

Advanced knowledge of Jakarta EE/J2EE, EJB 3, CDI, JMS, and WebLogic 14

High proficiency with JavaScript, HTML5, CSS3, Angular, Vue, and Bootstrap

Experience with Webpack, Vite, Nx, and RxJS

Advanced experience designing and securing REST APIs with OpenAPI/Swagger

Very good knowledge of Apache Kafka

Knowledge of JAX‑WS, JAXB, Protobuf, Camunda, Activiti, and BPMN 2

Strong experience with PostgreSQL, Oracle, MongoDB, Elasticsearch, schema design, and query optimization

Experience with Maven and Liquibase

Strong AWS cloud experience

Experience with Terraform and AWS CloudFormation

Experience with Docker, Kubernetes, CaaS, Consul, and AWS VDI environments

Advanced Git expertise, including GitFlow and trunk‑based development

Experience with GitLab, Bitbucket, and SVN

Experience with Hexagonal Architecture, microservices, and CQRS

Strong knowledge of OAuth 2.0, OpenID Connect, and JWT

Experience with Kibana, Dynatrace, Prometheus, Micrometer, and distributed tracing

Very good knowledge of JUnit 4/5 and experience with Mockito, Vitest, and Playwright

Extensive experience with large‑scale Agile delivery using Jira

Knowledge of Scrum, Scrum of Scrums, SAFe, and PM2‑Agile

Experience with AI‑assisted development tools such as Amazon Q and Kiro, including review of AI‑generated code

Strong analytical, risk assessment, communication, and technical decision‑making skills

English or French proficiency at B2 level or higher

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.