Fullstack Engineer (Java/React)

Locations: Białystok, Kraków, Wrocław, or Remote

Salary: 17,300 - 22,000 PLN net (B2B)

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About the Position

Grape Up is a consulting and technology company helping enterprises build mission-critical applications by leveraging AI, cloud-native technologies, and modern software delivery practices. We’re looking for an experienced Fullstack Engineer proficient in Java and React to join a senior, dedicated team providing production support and evolution for a major automotive OEM’s connected-vehicle platform.

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Responsibilities

• Own the full incident lifecycle for live production services – triage, resolve, and run root-cause analysis on high-severity (P1/P2) incidents so they don’t come back.
• Write permanent fixes, hotfixes, and patches in a modern Java 21 / Spring codebase, not just workarounds.
• Identify and drive technical improvements, harden reliability and performance.
• Level up observability and automation: add the missing logs, metrics, and traces, build self-healing and alert-noise reduction, and automate the toil out of operations.
• Handle system lifecycle work – framework/library upgrades, security patching, vulnerability remediation, End-of-Life monitoring.

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Requirements

• 3+ years of experience building and/or supporting backend applications on the JVM, with strong Java and Spring.
• Experience operating microservices and web applications in production, including troubleshooting live issues.
• Working knowledge of AWS and CI/CD pipelines.
• Hands-on experience with observability tooling (logs, metrics, traces) and production monitoring.
• Solid Git skills and understanding of security-and-compliance practices.
• Excellent command of English and Polish (all communication, reports, and documentation are in English).
• Analytical thinking and strong problem-solving skills.
• Comfort with a shifted work schedule (10:00–18:00) and openness to occasional international business travel.

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Nice to Have

• Experience supporting automotive OEM or connected-vehicle platforms.
• Familiarity with application servers such as Tomcat.
• Experience in production-support / on-call / SRE-style roles and incident management.
• Familiarity with ServiceNow, JIRA, and Confluence in an operational context.
• Comfortable working across the stack – primarily Java/Spring backend, with some React Native mobile support.
• Experience with certificate/secrets management and disaster-recovery testing.

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We Offer

• Competitive salary range of 17,300 - 22,000 PLN net (B2B).
• Opportunities to work in Białystok, Kraków, Wrocław, or remotely.
• Comprehensive benefits package including employee referral programs, knowledge platforms, equipment, integration activities, lunch & learn sessions, in-house tech up, language lessons, conferences & training, development plans, feedback sessions, and business travel opportunities.

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About the Company

Grape Up is a consulting and technology company helping enterprises build mission-critical applications by leveraging AI, cloud-native technologies, and modern software delivery practices.

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Application Process

1. Application: Send us your CV through the application form.
2. HR & technical interview: Let’s talk about your experience and expectations.
3. Meeting with the Manager: Learn more about the project you could be involved in.
4. Offer: We’re excited to welcome you onboard! Let’s discuss the details.
5. Feedback: If you’re not lucky this time, we’ll tell you what you can improve to join us in the future.