Senior Kotlin Engineer

We’re looking for a Senior Software Engineer who is comfortable working on large, complex systems and helping transition them into more modular, scalable solutions. You’ll play a key role in shaping architecture, driving technical standards, and ensuring the stability and reliability of business-critical services.

Location: Fully remote within Poland

Engagement: long-term (min. 6 months)

Rate: 140–160 PLN/h net (B2B)

Obowiązki

• Working with sizable monolithic applications and decomposing them into well-structured modules

• Designing solution architecture and contributing to long-term technical direction

• Creating and refining complex business logic in an insurance-focused environment

• Defining engineering standards and supporting the technical roadmap

• Collaborating closely with product managers, designers, and stakeholders to shape technical solutions

• Leading technical discussions, mentoring team members, and promoting strong engineering culture

• Participating in on-call rotations and contributing to high-availability system development

• Translating product and business requirements into robust technical designs

• Ensuring data integrity and reliability across business-critical systems

Core Technologies

• Kotlin – minimum 5 years of hands-on experience

• Java – strong proficiency, used alongside Kotlin in existing systems

• Spring Framework – especially Spring Boot for building backend services

• Hibernate – ORM and data persistence

• AWS – experience with cloud-based infrastructure and services

Architecture & System Skills:

• Working with large monolithic systems and gradually decomposing them into modular, service-oriented components

• Solid understanding of system architecture, including designing scalable and maintainable solutions

• Experience building high-availability systems and participating in on-call rotations

Domain & Collaboration:

• Designing and implementing complex business logic (insurance domain is a plus)

• Ability to collaborate with product teams, designers, PMs, and cross-domain stakeholders

• Experience influencing technical strategy, setting coding standards, and mentoring other engineers

Nice to have:

• Background in insurance/finance/banking

• Experience working with cross-domain teams (e.g., underwriting, triage)