System Architect

Traffit; Warszawa; Hybrid; PLN 216,000 - 308,000; Full time

Job summary

KUBO in Warsaw is seeking an experienced System Architect with strong Java development skills to join a technology team building scalable IT systems for the insurance sector. This hands-on role blends software architecture, leadership, and active development.

Expect to code about 75% of your time while guiding the team, setting standards, and driving high-quality software across microservices-based applications and API integrations.

Qualifications

• Strong hands-on Java development
• 5+ years designing and building web-based systems
• Proven experience designing microservices architectures and distributed systems
• Knowledge of architectural and integration patterns
• Extensive experience with API design and system integration
• DDD knowledge and practical event-driven architecture
• Experience with SQL and relational databases
• Observability and end-to-end monitoring
• Containerization and orchestration with Docker/Kubernetes
• Experience leading technical teams and guiding architecture decisions
• English B2 level; Polish C1 required
• Hybrid work in Warsaw with 3 days in the office and 2 days remote

Responsibilities

• Act as Technical Lead within a Scrum team, guiding architecture and supporting day-to-day development
• Develop and implement business requirements using Java
• Design, develop, and evolve system architectures, microservices, and distributed systems
• Collaborate with Product Owner and stakeholders to translate requirements into technical solutions
• Maintain coding standards, architectural principles, and integration guidelines
• Conduct code reviews to ensure high quality, maintainability and performance
• Mentor developers and support ongoing skill development
• Troubleshoot complex technical issues and identify effective solutions
• Design and oversee system integrations and API architecture
• Ensure performance, security, scalability, and reliability

Skills

Java development

Microservices

DDD

API design

Observability

Team leadership

Scrum

English (B2)

Polish (C1)

Cloud computing

Architecture decisions

Cross-team collaboration

Tools

Docker

Kubernetes

Azure

Job description

We are looking for an experienced System Architect with strong Java development skills to join a technology team working on modern, scalable IT systems for a leading company in the insurance sector.

This is a hands-on technical role combining software architecture, active development, and technical leadership. The successful candidate will spend approximately 75% of their time coding, while also guiding the development team, making architectural decisions, and ensuring high standards of software quality.

The role offers an opportunity to contribute to the design and development of microservices-based applications, drive technical improvements, and collaborate closely with business stakeholders and cross-functional technology teams.

Key responsibilities

Act as a Technical Lead within a Scrum team, providing technical guidance and supporting the team in day-to-day development.

Actively develop and implement business requirements using Java.

Design, develop, and evolve system architectures, microservices, and distributed systems.

Collaborate with the Product Owner and business stakeholders to clarify requirements and translate them into technical solutions.

Define and maintain coding standards, architectural principles, and integration guidelines.

Conduct code reviews and ensure high standards of code quality, maintainability, and performance.

Mentor developers and support the continuous development of the team's technical skills.

Troubleshoot complex technical issues and help the team identify effective solutions.

Design and oversee system integrations and API architecture.

Ensure that solutions meet performance, security, scalability, and reliability requirements.

Collaborate with other Scrum teams, architects, DevOps engineers, and integration specialists.

Contribute to technology selection, architectural decisions, and technical risk assessments.

Apply cloud technologies, preferably Microsoft Azure, where appropriate.

Explore and leverage Agentic AI and other AI-powered tools in the software development lifecycle to improve productivity, automate tasks, and support technical decision-making.

Strong hands-on Java development experience, supported by a proven track record of delivering production-grade applications.

At least 5 years of experience designing and building web-based systems.

Proven experience designing microservices architectures and distributed systems.

Strong knowledge of architectural and integration patterns.

Extensive experience with API design and system integration.

Practical knowledge of Domain-Driven Design (DDD).

Experience with relational databases, SQL, and query optimization.

Practical knowledge of Event-Driven Architecture.

Experience implementing end-to-end observability.

Experience conducting code reviews, mentoring developers, and providing technical leadership.

Ability to collaborate effectively across multiple teams and technical disciplines.

Experience contributing to architectural and technology decisions, including technical risk assessment.

Familiarity with containerization and orchestration technologies, particularly Docker and Kubernetes.

English proficiency at B2 level, polish language - at least C1

Availability to work in Warsaw in a hybrid model, with at least 3 days per week in the office and 2 days remotely.

Conditions

Location: Warsaw (hybrid - 3 days in the office, 2 days remote)
Contract Type: B2B
Rate: Up to 190 PLN net/hour
Start Date: ASAP
Project Duration: Until 31 March 2028

• Phone call with a Recruiter
• Feedback and decision

At KUBO, we genuinely care about people. We welcome candidates of all ages, backgrounds, identities, family constellations, health situations, and ways of thinking and interacting with the world. You’re welcome to be yourself - we value authenticity, and we’re committed to creating a fair and inclusive process for everyone.