Senior Fullstack Developer (Java+React)

Our requirements

• 8+ years of hands-on software engineering experience, including significant experience in enterprise scale systems.
• 4+ years of front-end development experience, mainly React, with strong knowledge of modern JavaScript / TypeScript frameworks, component design, state management, and reactive UI patterns.
• Expert level Java experience, including Spring / Spring Boot / Spring Cloud, microservices, RESTful APIs, and integration-oriented architecture
• BSc in Software Engineering or BS degree in Computer Science, or equivalent practical engineering experience.
• Strong experience in distributed systems design, API-first architecture, service resilience, service discovery, circuit breaker patterns, scalability, observability, and performance tuning.
• Strong experience with TDD/BDD and automated testing using frameworks such as JUnit, Jasmine, Mockito, Protractor/Selenium, or equivalent modern tools.
• Solid DevOps mindset and hands-on experience with CI/CD, Jenkins or equivalent pipelines, automated quality gates, deployment automation, and production-readiness practices.
• Experience designing, developing, and deploying cloud/hybrid
• Experience with Kotlin, functional programming, Java Streams, and modern JVM ecosystem practices - strong advantage.
• Ability to evaluate technology options, make architectural trade-offs, and communicate technical recommendations clearly to both engineering and management stakeholders.
• Self-starter with strong ownership, ability to prioritize complex work, drive decisions, and operate effectively in a rapidly changing environment.
• Excellent problem-solving skills, high engineering judgment, strong critical thinking, and ability to simplify complex technical challenges.
• Good English - verbal and written.

Optional

• Practical experience using AI assisted development tools such as GitHub Copilot, Microsoft Copilot, ChatGPT/OpenAI based tools, or equivalent AI engineering assistants.
• Ability to use AI tools to accelerate coding, unit-test generation, refactoring, documentation, troubleshooting, API exploration, and code-review preparation.
• Understanding of responsible AI usage in software engineering, including data sensitivity, security, IP awareness, validation of generated output, and human-in-the-loop review.
• Experience integrating AI/LLM capabilities into applications, workflows, developer tooling, or automation processes - strong advantage.
• Ability to identify practical AI use cases that improve developer productivity, reduce manual effort, and increase delivery quality without compromising security or maintainability.

Your responsibilities

• Hands on expert level fullstack development of innovative, business critical applications.
• Own and lead the full engineering lifecycle: technical discovery, solution design, architecture, implementation, testing strategy, DevOps, production readiness, and continuous improvement.
• Act as a technical authority for complex Java/Spring, React, microservices, cloud/hybrid, and container-based solutions.
• Drive XP practices with remote pairing, TDD/BDD, continuous integration and high-quality engineering standards.
• Use AI-assisted development capabilities responsibly to accelerate delivery, improve design quality, generate tests, review code, support refactoring, and enhance engineering productivity

About the project

This is how we organize our work

This is how we work on a project

• code review
• BDD
• TDD
• Continuous Integration
• DevOps
• test automation

What we offer

• Long-term cooperation in a prestigious, global corporation
• Cooperation with international teams across Europe
• Career development path - from Software Engineer to Tech Lead
• Challenging projects and exposure to new technologies
• Private healthcare package or access to Multisport

Development opportunities we offer

• conferences abroad
• conferences in Poland
• development budget
• mentoring

Benefits

• sharing the costs of sports activities
• private medical care

Recruitment stages

• 1.
  Rozmowa telefoniczna – wstępna rozmowa z Rekruterem
• 2.
  Weryfikacja u klienta – ocena dopasowania do wymagań biz.
• 3.
  Rozmowa kwalifikacyjna – spotkanie z przedstawicielem firmy

Integral Solutions