We are looking for a Senior Back-End Developer to take ownership of complex backend systems, lead technical architecture decisions, and mentor the next generation of developers. You will work with cutting-edge technologies to design, build, and optimize services that impact billions of mobile users worldwide.
This is a hands-on leadership role — ideal for someone who thrives in a fast-moving environment, enjoys collaborating across functions, and is driven to deliver scalable, reliable, and future-proof systems. Requirements: * Bachelor’s degree in Computer Science or equivalent practical experience; * 5+ years of professional Java development experience; * Proven track record in designing and delivering complex distributed systems and microservices (Docker, Kubernetes); * Strong understanding of scalability, concurrency, and performance optimization challenges; * Hands-on experience with CI/CD tools and automated build/deployment pipelines; * Proficiency in Spring & Spring Boot frameworks; * Excellent communication skills and the ability to influence technical direction across teams; * Experience running applications on Kubernetes, with a focus on designing services that scale efficiently and consume resources effectively (rather than cluster administration); * Ability to measure and improve application performance using profiling, benchmarking, and APM tools (e.g., JFR, JMeter, Micrometer, New Relic, Datadog).
Responsibilities: * Design and develop highly scalable, modular backend applications and APIs using Java and Spring Boot; * Own the full development lifecycle — from requirements analysis, design, coding, and testing to deployment and monitoring in production; * Lead initiatives to improve system scalability, performance, and security; * Collaborate closely with Product, Algo, DevOps, BI, and Marketing to deliver integrated, business-driven solutions; * Ensure observability through robust logging, metrics, and alerting with tools like Prometheus, Grafana, Kibana; * Drive adoption of engineering best practices, code quality standards, and technical documentation; * Mentor and guide junior developers, fostering knowledge sharing and continuous improvement.
Will be a plus: * Background with NoSQL databases (MongoDB, Couchbase) and SQL databases; * Knowledge of reactive programming (Spring WebFlux); * Familiarity with monitoring and alerting tools such as Prometheus, Grafana and Kibana.
What we offer: * Help and support from our caring HR team; * 20 days of vacation; * Health Insurance; * Gym Subscription (Multisport); * The exchange of experience and work with talented colleagues; * Last but not least — valuable compensation for your efforts.
