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.

Oferujemy

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
  
  

Wymagania

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)