Senior Backend Engineer

Casumo is an equal opportunity employer. We celebrate diversity and are committed to creating an inclusive environment for all employees.

Join us at Casumo, where you are invited to be your authentic YOU-MO!

Company Overview

Welcome to Casumo, your passport to a world of fun, excitement, and responsible gaming. We're an international online casino company with a knack for creating unforgettable gaming experiences. Our secret sauce? A blend of innovation, security, and a dash of playful charm.

Nowadays, we're on the hunt for a dynamic & well versed Senior Backend Engineer!

Team Overview

As an online gaming company, our software is the heart of our business. We strive to create a safe, engaging and unparalleled player experience; we research, experiment and iterate. Our mission: to build a product and an organisation that puts the experience first, delivering high-quality products our players love while enabling our people to be productive and creative without unnecessary disturbances.

Responsibilities

• Design, build, and operate scalable, highly available backend systems with a strong focus on reliability and continuous delivery.
• Build and evolve backend services within an event-driven, microservices architecture, using message brokers such as RabbitMQ or Kafka.
• Take end-to-end technical ownership of features and services, from design and implementation through testing and production readiness.
• Collaborate closely with other engineers, Product, and QA to deliver well-scoped, high-quality solutions.
• Lead by example in code reviews, setting a high bar for readability, maintainability, and testability.
• Mentor mid-level and junior engineers through hands-on technical guidance, feedback, and knowledge sharing.
• Lead and participate in technical interviews, helping maintain a strong and consistent hiring bar.
• Proactively contribute to improving engineering practices, tooling, and system reliability over time.

Requirements

• 5+ years of hands-on backend engineering experience.
• Strong, practical experience with Java, Spring Framework / Spring Boot, and building REST-based services.
• Proven experience with event-driven architectures, including message brokers such as RabbitMQ, Kafka, or similar (required).
• Solid experience working with relational databases (MySQL, PostgreSQL, OracleDB, or similar).
• Experience designing and operating distributed systems and microservices in production environments.
• A strong focus on code quality and automated testing practices (unit and integration tests).
• Confident using Git-based workflows and collaborating effectively within cross-functional teams.

Nice To Have

• Experience with CQRS, Domain-Driven Design (DDD), event sourcing, or NoSQL databases.
• Familiarity with Test-Driven Development (TDD).
• Experience with Docker, CI/CD pipelines, and modern cloud platforms (e.g. GCP).
• Knowledge of Kotlin.

How We Work

• We operate in cross-functional Agile teams, collaborating through planning, reviews, and retrospectives.
• We value clear communication, predictable delivery, and well-tested systems.
• Senior engineers are expected to lead by example, support others, and continuously raise the engineering bar.

Think we're a good match? Apply now!

The Perks

Being a part of the Casumo group provides an unparalleled experience. You’ll find yourself surrounded by the brightest minds within the most inspiring and collaborative office spaces! In addition to that, you’ll enjoy:

Our Skopje Office

• Private health insurance
• Wellness incentives, including a fitness allowance and mental well-being services
• 2 weeks Work From Anywhere (10 days), increased to 4 weeks (20 days) after longer duration of employment within the Company: explore the world while working remotely
• Office lunches - three times per week
• Access to some of the greatest tools and platforms for developing your professional skills and building success within your role
• A range of training courses, known as Casumo College, for continuous learning and growth
• Social events for building strong relationships with colleagues from all across the organisation

Our Malta Office

• Private health insurance
• Wellness incentives, including a fitness allowance and mental well-being services
• Flexible national holidays: public holidays mean more time off, choose how and when to enjoy them!
• 2 weeks Work From Anywhere (10 days), increased to 4 weeks (20 days) after longer duration of employment within the Company: explore the world while working remotely
• Gourmet lunches and healthy snacks prepared by our in-house chef
• Variety of discounts from local vendors
• Access to some of the greatest tools and platforms for developing your professional skills and building success within your role
• A range of training courses, known as Casumo College, for continuous learning and growth
• Social events for building strong relationships with colleagues from all across the organisation

Our ABC Values

ASPIRE

At Casumo, "aspire" means pushing beyond the ordinary and transforming obstacles into stepping stones. Challenges are our breakfast of champions, and comfort zones are out of bounds. Mediocrity? Left behind. Our mantra? Dream big, aim high, and always be ready for the next adventure in innovation.

BELIEVE

Belief at Casumo isn't just a feel-good sticker; it's the glue that binds us. Turning "me" achievements into "we" victories, we're a tight-knit crew of dreamers, doers, and relentless supporters. With a high-five arsenal and a trusty cheerleading squad, we're on a mission to prove that together, we're not just strong; we're Casumo strong.

CARE

Care is our secret ingredient, the cherry on top of our game. It's not only about ensuring our players have a blast (responsibly, of course); it's about weaving a fabric of support so tight, even the toughest challenges can't tear us apart. From tailoring player experiences to being there for each other, we're all about creating memorable moments.