About this role

SENIOR BACKEND JAVA ENGINEER (FREELANCE CONTRACT) – HUNGARY Contract Length: 3+ Months Start Date: ASAP Day Rate: 120,000 HUF – 180,000 HUF per day Location: Hungary About the Role Beyond Sports is looking for an experienced Senior Backend Java Engineer to support a large-scale cloud migration project, moving critical backend services and infrastructure from AWS to Azure. This is a hands-on freelance contract opportunity for a senior engineer with deep Java expertise, strong cloud migration experience, and a passion for building scalable, high-performance backend systems.

You’ll work closely with cross-functional engineering teams to modernise services, improve architecture, and ensure smooth integration across cloud environments. KEY RESPONSIBILITIES - Design, refactor, and migrate scalable backend systems and REST APIs using Java and Spring Boot - Support AWS to Azure migration activities across applications and infrastructure - Re-architect and modularise services to improve scalability, maintainability, and performance - Implement secure identity, secrets management, and key vault solutions - Integrate third-party services including sports data, video, and commentary providers - Build and maintain APIs supporting web and mobile applications - Deliver infrastructure changes using Infrastructure as Code tools such as Terraform and Bicep - Manage deployments and automation through CI/CD pipelines - Monitor, troubleshoot, and optimise cloud services and application performance - Collaborate in sprint planning, technical discussions, and code reviews - Produce clear technical documentation for systems, APIs, and migration processes REQUIRED SKILLS & EXPERIENCE Essential - Strong commercial experience with Java and Spring Boot - Proven experience delivering AWS → Azure migration projects - Strong understanding of cloud security, IAM, secrets management, and key vaults - Experience designing and integrating RESTful APIs - Docker containerisation experience - Kubernetes experience across EKS and/or AKS - Strong knowledge of AWS services including S3, DynamoDB, and RDS - Experience with Azure services including Cosmos DB, Blob Storage, and Azure Database for MySQL - Cloud networking knowledge including VPCs, VNets, API Gateway, and API Management - Infrastructure as Code experience with Terraform - CI/CD pipeline automation using tools such as GitLab, Bitbucket Pipelines, or ArgoCD Desirable - Cloud cost optimisation and performance tuning experience - Strong testing and QA practices including automation and regression testing - Kafka or other event-driven architecture experience - SQL database experience including PostgreSQL, MySQL, or Azure SQL If you're an experienced backend engineer looking for your next freelance contract within a modern sports technology environment, we’d love to hear from you.

Source listing: ashby_wearebeyondsports