Senior Backend Engineer (Kotlin/Java) - Hybrid & AI-Driven

Allegro Ltd.; Polska; Hybrid; PLN 210,000 - 289,000; Full time

Benefits offered by this job

Hybrid work model

Well-located offices & facilities

MacBook Pro / equipment

Fringe benefits cafeteria plan

English language courses

Volunteer day

Job summary

Allegro Ltd. in Warsaw is seeking backend engineers to build high-throughput services in Kotlin and Java, with a focus on API management, security, and AI-assisted tooling.

You will join Allegro Tech, work in a hybrid setup (4/1) with flexible hours, modern tech stack (Kubernetes, Docker, BigQuery), and opportunities to grow your skills while delivering impactful products for millions of customers. The role also offers a competitive PLN salary, annual bonus, RSUs, volunteering days, and a

Qualifications

• Commercial experience coding in Kotlin or Java.
• Value high-quality code and engineering best practices to solve complex challenges in distributed systems.
• Excited to find new ways of using AI in daily work.
• Embrace a growth mindset, value team stability, and are open to occasionally picking up frontend tasks.
• Communicate effectively in Polish and English (at least a B2 level).

Responsibilities

• Design and implement high-throughput backend services with a strict 50 ms time budget.
• Develop API management and security tooling for platform compliance.
• Collaborate with Data Scientists and ML Engineers to automate processes and decisions.

Skills

Kotlin

Java

React

Tools

Kubernetes

Docker

Consul

GitHub

GitHub Actions

Job description

Allegro Ltd. in Warsaw is seeking backend engineers to build high-throughput services in Kotlin and Java, with a focus on API management, security, and AI-assisted tooling.

You will join Allegro Tech, work in a hybrid setup (4/1) with flexible hours, modern tech stack (Kubernetes, Docker, BigQuery), and opportunities to grow your skills while delivering impactful products for millions of customers. The role also offers a competitive PLN salary, annual bonus, RSUs, volunteering days, and a