Java Services Engineer

Reelu; Warszawa; Hybrid; PLN 180,000 - 240,000; Full time

Benefits offered by this job

Remote-first

Learning budget

Health benefits

Annual bonus

Career progression

Global team

Job summary

Reelu is recruiting a Java Services Engineer for Warsaw, with remote-friendly setup. You will design and optimize scalable backend game services, focusing on high performance, low latency, and reliable APIs while collaborating with international studios.

The role emphasizes building reusable components, writing tests, and contributing to a fast-moving gaming platform used by millions of players worldwide.

Qualifications

• 2+ years of professional software development experience.
• Experience designing, building, and optimizing scalable, high-throughput backend services.
• Strong analytical and problem-solving skills with exceptional attention to detail.
• Upper-Intermediate English or higher, with the ability to collaborate effectively in an international team.

Responsibilities

• Design, develop, and optimize scalable, high-performance backend game services using Modern Java (Java 17/21+).
• Build low-latency APIs and distributed services capable of handling high volumes of concurrent transactions.
• Collaborate with game designers, mathematicians, product teams, and client developers to transform game specifications into robust backend solutions.
• Standardize core business logic and calculation engines into reusable backend components.
• Write comprehensive unit tests and continuously optimize service performance, reliability, and scalability.
• Participate in code reviews, share engineering best practices, and contribute to a collaborative development culture.
• Work closely with engineering teams across multiple international studios to build next-generation gaming platforms.

Skills

Java backend

Distributed systems

High-performance backend

English communication

Tools

MySQL

NoSQL databases

Git

Job description

This role is being recruited through Reelu, a talent platform that connects top candidates with leading companies in iGaming, fintech, and sportsbook.

We are currently seeking a Java Services Engineer, remote in Warsaw, for one of our client companies.

Reelu helps you showcase your experience through a short Storyboard and match with opportunities that fit your skills.

The ideal candidate is a skilled Java backend engineer who thrives on building high-performance, scalable systems. You enjoy solving complex technical challenges, optimizing distributed services, and turning mathematical models into reliable backend solutions. With a strong foundation in modern Java and backend architecture, you're passionate about writing clean, efficient code and collaborating with cross-functional teams to deliver exceptional gaming experiences. If you're analytical, detail-oriented, and excited to work in a fast-moving, international environment where your work directly impacts millions of players worldwide, you'll fit right in.

Responsibilities

• Design, develop, and optimize scalable, high-performance backend game services using Modern Java (Java 17/21+).
• Build low-latency APIs and distributed services capable of handling high volumes of concurrent transactions.
• Collaborate with game designers, mathematicians, product teams, and client developers to transform game specifications into robust backend solutions.
• Standardize core business logic and calculation engines into reusable backend components.
• Write comprehensive unit tests and continuously optimize service performance, reliability, and scalability.
• Participate in code reviews, share engineering best practices, and contribute to a collaborative development culture.
• Work closely with engineering teams across multiple international studios to build next-generation gaming platforms.

Qualifications

• 2+ years of professional software development experience.
• Experience designing, building, and optimizing scalable, high-throughput backend services.
• Strong analytical and problem-solving skills with exceptional attention to detail.
• Upper-Intermediate English or higher, with the ability to collaborate effectively in an international team.

Nice to Have

• Background in probability, statistics, or mathematical modeling.
• Experience with relational databases (MySQL) and NoSQL databases.
• Familiarity with scripting languages for automation, validation, or data processing.
• Experience using AI-assisted development tools such as GitHub Copilot or LLM-powered coding assistants.

Why Join Us?

• Remote-first culture – Work from wherever you do your best work with the flexibility to maintain a healthy work-life balance.
• Creative ownership – Bring ideas to life and play a key role in shaping our global brand and marketing presence.
• Learning & development – Dedicated learning budgets and development days to help you stay ahead of the latest marketing and AI trends.
• Health & wellbeing – Medical coverage and wellness benefits designed to support your physical and mental wellbeing.
• Performance bonuses – Be rewarded for your contributions through an annual company bonus.
• Career progression – Grow your career through both vertical and cross-functional opportunities.
• Global team – Collaborate with talented colleagues from around the world in a diverse, innovative, and supportive environment.