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Senior Backend Engineer

Warsaw (hybrid)💼 Full-time🗓 2026-08-19 → 2026-09-25

Core

Design, build, and operate backend services for the next generation of an underwriting platform, turning ambiguous underwriting problems into reliable software.

Role type

Senior Backend Engineer (JVM)

Builds

hx Renew, the SaaS platform enabling insurers to model complex risks and make pricing decisions

Domain

Insurance technology / Underwriting

Deliverable

production ML models | product features

Required skills

Kotlin, Java, JVM languages, system design, architecture, API design, domain modeling, observability, AI coding tools usage

Preferred skills

Insurance/underwriting domain knowledge, frontend/backend full-stack experience, workflow/agent-assisted product building, enterprise client experience

Technologies

Kotlin, Java, Claude

Responsibilities

Design and build backend services in Kotlin or Java; Shape architectural decisions including APIs, domain models, and persistence; Build agent-assisted workflows; Use AI coding tools as a core part of development; Collaborate with frontend engineers and product partners

Seniority

Senior, hands-on IC

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