System Architect

KUBO; Warszawa; Hybrid; PLN 216,000 - 308,000; Part time

Job summary

KUBO in Warsaw is seeking an experienced System Architect with strong Java development skills to join our technology team working on modern, scalable IT systems for the insurance sector. This hands-on role blends software architecture with active development and technical leadership, with approximately 75% of time spent coding and the rest guiding the team and shaping architecture.

You will design microservices and distributed systems, define coding standards, review code, mentor engineers, and

Qualifications

• Strong hands-on Java development experience.
• 5+ years designing and building web-based systems.
• Experience with microservices architectures and distributed systems.
• Knowledge of architectural and integration patterns.
• Experience designing APIs and system integration.
• Practical knowledge of Domain-Driven Design (DDD).
• Relational databases, SQL, and query optimization.
• Event-Driven Architecture experience.
• End-to-end observability experience.
• Code reviews, mentoring, and technical leadership.

Responsibilities

• Act as Technical Lead within a Scrum team, guiding 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.
• Define and maintain coding standards, architectural principles, and integration guidelines.
• Conduct code reviews and ensure high quality, maintainability and performance.
• Mentor developers and support skill development.
• Troubleshoot complex technical issues and guide solutions.
• Design and oversee system integrations and API architecture.
• Ensure performance, security, scalability and reliability of solutions.
• Collaborate with other Scrum teams, architects, DevOps, and integration specialists.
• Contribute to technology selection and risk assessments.
• Apply Azure and other cloud technologies where appropriate.
• Leverage AI tools to improve productivity and decision making.

Skills

Java development

Web-based systems design

Microservices architectures

Distributed systems design

DDD

SQL

Event-Driven Architecture

Observability

Code reviews/mentoring

English (B2)

Tools

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.

Ideal candidate profile:

• Strong hands-on Java development experience.
• 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.
• 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
• Project Duration: Until 31 March 2028