Lead Full Stack Engineer (Java+JS)

SoftServe Inc.; Polska; On-site; PLN 260,000 - 420,000; Full time

Job summary

SoftServe is seeking a Lead Full-Stack Java Engineer to work on large-scale enterprise systems supporting grants and external expert management in a European public-sector environment.

You will blend hands-on full-stack development with technical leadership, ensuring adherence to architecture, quality, security, and delivery standards across distributed, cloud-based systems.

Qualifications

• Master’s degree or equivalent with 15+ years IT experience.
• Senior/Lead Developer or Architect with strong technical leadership.
• Expert knowledge of Java 19/21/25, Node.js and PHP backends.
• Spring, Spring Boot, Spring Cloud, Hibernate, REST APIs experience.
• Jakarta EE/J2EE, EJB 3, CDI, JMS, WebLogic 14 knowledge.
• Strong frontend: JavaScript, HTML5, CSS3, Angular, Vue, Bootstrap.
• OpenAPI/Swagger for API design and security.
• Kafka knowledge; database expertise: PostgreSQL, Oracle, MongoDB, Elasticsearch.
• Maven, Liquibase; AWS, Terraform; Docker and Kubernetes.
• Git-based workflows (GitFlow, trunk-based); Jira/Agile practices.
• AI‑assisted development tools experience is a plus.
• English or French at B2+ level.

Responsibilities

• Develop and maintain front-end and back-end applications.
• Design responsive interfaces, APIs, business logic, and DB integrations.
• Build and secure RESTful APIs and web services.
• Apply security best practices for auth, validation, storage, logging and monitoring.
• Perform unit and integration testing, debugging, production issue resolution.
• Deploy and manage apps using AWS, CI/CD pipelines, Docker, Kubernetes.
• Maintain code quality and scalable architecture; document decisions.
• Lead technical delivery and align cross-functional teams.
• Guide developers, review solutions, and ensure design quality.
• Contribute to large-scale Agile delivery and continuous improvement practices.

Skills

Java

Spring

Microservices

AWS

Docker

Kubernetes

CI/CD

OpenAPI/Swagger

SQL

Tech leadership

Education

Master's degree

Tools

Maven

Liquibase

Git

GitLab

JUnit

Mockito

Playwright

Docker

Kubernetes

Job description

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.