Freelance Backend Software Engineer

12 days ago

Budapest, HungarySenior

Responsibilities

Design, refactor, and maintain scalable backend microservices and APIs using Java and Spring Boot.
Re-architect backend systems to improve maintainability, reliability, and throughput.
Implement identity, secrets management, and authentication standards across cloud environments.
Integrate real-time sports data feeds, video streams, commentary providers, and other third-party systems.
Deploy and manage containerized services with Docker and Kubernetes.
Provision and maintain cloud infrastructure using Terraform.
Build and manage automated deployment workflows and CI/CD pipelines.
Monitor, troubleshoot, and optimize application and database performance.
Participate in technical planning, architecture discussions, and peer code reviews.
Create maintainable technical documentation for APIs and backend systems.

Strong commercial contracting experience with Java and Spring Boot.
Production experience building, deploying, and maintaining applications in AWS or Azure cloud environments.
Hands-on Docker and Kubernetes experience.
Expertise designing and building secure, high-traffic APIs.
Practical Terraform experience for Infrastructure as Code.
Working knowledge of relational and NoSQL databases including PostgreSQL, MySQL, DynamoDB, and Cosmos DB.
Understanding of cloud security fundamentals including IAM, secrets management, and key vaults.
Experience maintaining CI/CD pipelines using tools such as GitLab CI, Bitbucket Pipelines, or ArgoCD.
Experience with event-driven architectures using Apache Kafka or similar messaging systems is desirable.
Performance tuning, cloud cost optimization, automated testing, and cloud networking experience are desirable.

51-200 employees