Principal / Senior Principal Java & Python Engineer
Develop and maintain enterprise software using Java, Spring Boot, Spring MVC, and Python, building REST APIs and microservices while applying AI-assisted development tools and practices.
ABOUT THE ROLE
Join our dynamic team in Warsaw as a Senior Backend Engineer. In this role, you will play a crucial part in our Sportsbook domain by working on the most impactful problems and being able to bring about change with effective momentum. You'll collaborate closely with our Staff Engineers, participating in tech meetings, validating architectural decisions, and ensuring seamless communication flow. Additionally, you'll work collaboratively with various teams, contributing to planning, tech solutions discussions, and feature development. This role offers a unique opportunity to drive solutions and actively shape our backend architecture.
YOU WILL BE RESPONSIBLE FOR:
Taking ownership, problem-solving, and collaborating with other teams.
Designing and implementing from idea to production.
Building for scale, availability, performance, and security across the stack.
Working with product managers, architects, QA engineers, and other developers in a highly collaborative agile environment.
Integrating new products and building internal services to support our ecosystem.
Conducting code reviews and mentoring team members.
Ensuring services are production-ready, observable, and maintainable through monitoring, alerting, and on-call participation.
OUR SUCCESSFUL CANDIDATE WILL HAVE:
ESSENTIAL SKILLS:
6+ Years of software development experience with Java, Spring Boot, and Event-Driven Architectures.
Experience designing Microservices, K8s and Containerization (Docker), and Kafka messaging systems.
Knowledge of relational and NoSQL databases and caching.
Implementing resilience patterns (e.g., retries, circuit breakers, graceful degradation).
Designing and maintaining monitoring dashboards (e.g., metrics, logs, traces) and alerts to proactively detect issues.
Hands-on experience developing highly scalable RESTful end-to-end Microservices.
NICE TO HAVES:
Familiarity with Reactive Programming (e.g., RxJava) and Vert.x would be a big plus.
Experience in platforms like AWS and Google Cloud Platform.
Online gaming and gambling experience
WHO WE ARE
At the core of LeoVegas Group is Team Leo. Our culture is our foundation and is what enables us to innovate, build, and lead as we trailblaze our way through the iGaming industry. We’re a team of over 2000 innovators, initiators, and groundbreakers working in a fast-paced and agile environment across 21 offices worldwide.
BENEFITS
Hybrid work policy
4 weeks of Workation (T&C apply)
Benefits package - 800 PLN net (B2B)/gross (UOP) monthly with access to the cafeteria platform (private medical care, insurances, sports card)
Training budget
ICAS assistance program that can provide help and guidance during challenging moments.
Our office provides complimentary snacks and drinks; on Mondays, we serve complimentary breakfast.
Team and office social events throughout the year
Free parking for bicycles and motorcycles
Free gym in the building
Equipment: MacBook Pro + smartphone (iPhone 16/17 or Samsung Galaxy S25)
JOIN US!
In our pride, we empower our teammates to find their roar and run with their wildest ideas. We don’t wait for things to happen; we pounce and make it happen!
Would you be a good fit for the Leo Pride - give us a roar!
As our company working language is English, we’d like to see your CV in English, please
Develop and maintain enterprise software using Java, Spring Boot, Spring MVC, and Python, building REST APIs and microservices while applying AI-assisted development tools and practices.
Build the backend foundation for a next-generation advertiser management platform, designing APIs, services, and data models while delivering scalable, high-performance systems for internal tools.
Design, build, and operate reliable backend services for booking and ticketing platforms, owning complex features from technical design through production while improving service quality and reliability.
Build and evolve backend services and developer-facing APIs, Terraform Provider, and MCP integrations, owning features from design through production while improving reliability, security, and developer experience.
This role involves architecting and developing secure microservices and data solutions, enhancing Delinea's identity and access management ecosystem through innovative engineering practices.