Solution Architect / Technical Lead (Java)

Required skills: Java, PostgreSQL, Kafka, Spring Boot, CI/CD processes, Elasticsearch Solution Architect / Technical Lead (Java) Location: Remote / Hybrid - Warsaw with occasional visits in the office (1-4 times per month) Contract: B2B via Experis About the Role We are looking for an experienced Solution Architect / Technical Lead to join a large-scale banking project focused on payment systems. The role combines solution architecture, technical leadership, project coordination, and hands-on support across backend, frontend, and DevOps areas. Responsibilities Design solution architecture for banking payment systems Gather business and technical requirements Coordinate project teams and oversee technical delivery Prepare and maintain project documentation Support development activities across Backend, Frontend, and DevOps teams Ensure system scalability, security, and performance Requirements 5+ years of experience with banking payment systems 10+ years of experience with Java Strong experience with PostgreSQL, Elasticsearch, Kafka, and Kafka Streams Excellent knowledge of design patterns, UML, and Enterprise Architect Experience with high-volume transaction processing systems Expertise in Spring Boot, Spring WebFlux, Spring Cloud Gateway, Kafka Streams, Hibernate, Spring Security, and Resilience4j Experience with Tomcat, Netty, Hazelcast, and Ehcache Strong understanding of security concepts including PKI, Digital Signatures, JWT, TLS, and mTLS Experience with Docker and Kubernetes Experience with cloud platforms (GCP preferred) Knowledge of Git/Gerrit, Jira, Maven, IntelliJ, and CI/CD processes Experience with Prometheus, Grafana, Sentry, and Loki Experience using AI-assisted development tools such as GitHub Copilot and MCP What We Offer B2B contract via Experis Opportunity to work on a strategic banking transformation project Long-term cooperation Modern technology stack and high-impact architectural role Collaboration with experienced engineering teams