Senior Java Backend Lead and Architect

One Peak Partners LLP; Kraków; On-site; PLN 180,000 - 240,000; Full time

Benefits offered by this job

Official employment (Umowa o pracę)

Creative tax (KUP 50)

4 extra vacation days per year

3 days internal sick leave without a a

Health and Life Insurance

Employee Capital Plan (PPK)

Multisport card

Training & meetups coverage

English-speaking club

Polish language classes

Internet and glasses reimbursement

Cosy office in Krakow city centre (Dł.

Job summary

Keepit is building a Java engineering team in Krakow and seeks a Senior Java Engineer to help shape it from the ground up. You will own complex backend components for a cloud-to-cloud backup platform, driving architectural decisions for greenfield Java services.

Must have 5+ years of backend Java experience, Spring Boot, KeyCloak auth, SQL, Docker, and event-driven tech like Kafka or RabbitMQ. You will mentor peers and own technical decisions.

Qualifications

• 5+ years of backend Java development experience.
• Solid experience with Spring Boot, RESTful API design, and service-oriented architecture.
• Experience with KeyCloak and authentication/authorization systems.
• Strong SQL skills with relational databases.
• Experience with containerized solutions (Docker).
• Familiarity with event-driven architecture (Kafka, RabbitMQ).
• Experience with CI/CD pipelines and modern DevOps practices.
• Proactive mindset with willingness to share knowledge.

Responsibilities

• Lead technical design and architecture for features and services, ensuring scalability and maintainability.
• Participate in all phases of the software development lifecycle.
• Collaborate with Product, QA, Support, and Operations to resolve issues and deliver improvements.
• Maintain high code quality through documentation, code reviews, and architectural improvements.
• Ensure system reliability, including error handling, observability, and scalability.
• Mentor and grow other developers, acting as the technical authority on the team.

Skills

Backend Java

Spring Boot

RESTful APIs

Authentication Systems

SQL & RDBMS

Docker

Event-driven Architecture

CI/CD & DevOps

Proactive Mindset

Technical Ownership

Tools

Docker

Kafka

RabbitMQ

Job description

Keepit is building a Java engineering team in Krakow and seeks a Senior Java Engineer to help shape it from the ground up. You will own complex backend components for a cloud-to-cloud backup platform, driving architectural decisions for greenfield Java services.

Must have 5+ years of backend Java experience, Spring Boot, KeyCloak auth, SQL, Docker, and event-driven tech like Kafka or RabbitMQ. You will mentor peers and own technical decisions.