Lead Java Engineer

About B2Spin
We are B2Spin, and we are dedicated to delivering the best Free-to-Play Social Casino and gaming experiences by creating captivating, engaging, and unique products that are accessible to everyone. We have built a team of talented professionals from all over the globe, who are working to continually improve the experiences of our players. We are not looking to just be part of the industry, but to revolutionize it.

AI-Driven Engineering Culture
We are actively building an AI-driven engineering organization with a clear and deliberate stance: artificial intelligence is a core part of how we build and deliver software — not an experiment, not a trend, and not an optional add-on.

AI is embedded into our engineering workflows, from system design and prototyping to refactoring, testing, and code review. We expect engineers to be fully comfortable working in AI-driven environments and to treat AI as a primary productivity multiplier. Strong engineering judgment, architectural ownership, and accountability remain essential—AI amplifies our engineers, it doesn’t replace responsibility for technical decisions.

The Role
Lead the backend track of a self-sufficient, cross-functional squad (5–6 people across backend, frontend, and QA) building scalable, high-load services for our gaming platform. You will own backend technical direction, drive engineering excellence, and deliver complex features end-to-end.

What You Will Do
Lead backend development within your squad: technical guidance, code review culture, and mentoring of fellow engineers

Own services end-to-end — from requirements and system design through production deployment and operation

Guide complex, multi-quarter features through the full delivery lifecycle

Work closely with backend, frontend, QA, and product teams to ensure seamless delivery

Mentor engineers on architecture, best practices, and production troubleshooting

Shape system designs and contribute to the technical roadmap

 
What We Need
Expert-level Java (latest LTS) and deep Spring expertise; proven system design experience with RDBMS/SQL

Experience as a Technical Lead — guiding engineers and driving major initiatives to successful delivery

Effective use of AI-assisted development tools (agentic coding assistants, code review automation) in daily engineering work

Strong observability and troubleshooting skills: logging, metrics, alerting, monitoring, profiling

Solid understanding of security best practices relevant to backend services

Upper-intermediate (B2+) English for global collaboration

Bonus Points
Experience operating high-throughput, latency-sensitive systems at scale (e.g., real-time gaming, event-driven architectures with Kafka)

Hands-on experience with Docker, Kubernetes, and cloud deployments

Our Stack
Core: Java 25, Spring Boot 4, Maven

Data: PostgreSQL, Ebean ORM, Flyway

Messaging & real-time: Kafka, HTTP/WebSockets, Netty, RESTEasy, Quartz

Infrastructure: Kubernetes, Docker, GCP

CI/CD: Jenkins, GitHub Actions

Observability: ELK, Grafana