Backend Developers

Backend Developers

iGaming Retention Platform Backend Engineer — Hybrid, Warsaw, Poland

Develop scalable gaming retention, loyalty and player communication backend services.

Vacancy details

This is a private vacancy. Company details stay confidential until InVault confirms a serious candidate fit.

Status
Active
Date posted
2026-11-15
Open until
2027-02-13
Employment type
Full-time
Source-listed languages
Not specified
Language requirement
No mandatory language inferred
Work arrangement
Hybrid
Physical workplaces
Warsaw, Poland
Applicant eligibility
Applicant geography not specified

Overview

Build backend capabilities that support compliant player lifecycle communications, bonuses and loyalty features. Maintain Java microservices, data integrations and service reliability while working with gaming product and CRM engineers.

Requirements

  • Experience developing production backend services using Java and Spring frameworks.
  • Working knowledge of microservices and messaging systems such as Kafka.
  • Experience with relational databases and backend API integrations.
  • Ability to test and troubleshoot distributed application behavior.
  • Collaborative technical communication with product and engineering teams.

Responsibilities

  • Implement and maintain retention and loyalty backend APIs.
  • Develop tested Java microservices and database interactions.
  • Integrate event-driven player communication systems.
  • Resolve production performance and correctness issues.
  • Coordinate design and code reviews with product engineers.

Conditions

  • Full-time hybrid role based in Warsaw, Poland.