Senior Backend Engineer (AI-First)

Quick Facts

• Role: AI-First Senior Backend Engineer

• Focus: ~70% product changes with AI agents; ~30% improving team workflows with AI agents

Description

You’ll work in a Scrum setup within domain sub-teams, collaborating with Product Owners and the CTO. The role is AI-first: you will write production-quality code alongside AI agents (primarily Claude Code), lead the agent workflow, validate results, and ensure changes land safely in production. You’ll also develop and maintain Kotlin/Spring Boot backend services and convert recurring issues into lint rules, tests, and automations.

Responsibilities

• Develop production-quality code with AI agents (specify, run the agent, verify output, and deliver to production)

• Maintain and evolve backend services in Kotlin and Spring Boot

• Turn recurring bugs into linter rules, tests, and automation

• Create instructions/prompts for agents, perform reviews, and build recurring automation

• Validate improvements after deployments and rollbacks (not by token usage)

• Share knowledge and best practices for working with AI

• Occasionally update the internal admin/frontend panel

Requirements

• 3+ years of JVM backend development experience (Kotlin or Java) with Spring Boot

• Kotlin proficiency

• Strong commitment to code quality (Clean Code, Software Craftsmanship)

• Experience with TDD, DDD, hexagonal architecture, microservices, and event sourcing

• Practical experience using AI agents to work on code and knowing when not to rely on them

• Ability to write tests that prove behavior, including integration tests with a real database

• PostgreSQL knowledge and HTTP API design

• Ability to work independently and effectively with incomplete data

• Understanding of user needs and business context

• Comfort with collaboration and feedback

Benefits

• Remote, hybrid, or on-site work (depending on your preferences)

• Flexible start times (7:00–10:00)

• Employment contract (UoP)

• Company-paid access to AI tools

• Co-financing for training and development

• Multisport card and LuxMed package; access to a benefits platform

• Transparent career path and regular feedback

• Comprehensive onboarding and team support

• Integration events and a partner-like team atmosphere