Beyond Sports
Freelance Backend Software Engineer
- Location
- Budapest, Hungary, HU
- Arrangement
- Hybrid
- Employment type
- Temporary
- Posted
- 24 August 2026 (about a month ago)
Checked 28 days agoApplications go to the employer, never to RoleSprint
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 the development, scaling, and modernisation of our high-performance backend systems and cloud infrastructure.
This is a hands-on freelance contract opportunity for a senior engineer with deep Java expertise, strong cloud experience, and a passion for building resilient, scalable systems. You’ll work closely with cross-functional engineering teams to refactor core microservices, improve system architecture, and ensure low-latency integrations across our web and mobile platforms.
Key Responsibilities
- Design, refactor, and maintain scalable backend microservices and REST APIs using Java and Spring Boot
- Re-architect existing backend systems to optimize for maintainability, reliability, and throughput
- Implement secure identity, secrets management, and authentication standards across cloud environments
- Integrate third-party systems, including real-time sports data feeds, video streams, and commentary providers
- Deploy and manage containerised services using Docker and Kubernetes
- Provision and maintain cloud infrastructure using Infrastructure as Code (IaC) tools like Terraform
- Build, automate, and manage deployment workflows using modern CI/CD pipelines
- Monitor, troubleshoot, and optimize application and database performance
- Participate in technical planning, architectural discussions, and peer code reviews
- Produce clear, maintainable technical documentation for APIs and core backend systems
Required Skills & Experience
Essential
- Strong commercial contracting experience with Java and Spring Boot
- Proven background building, deploying, and maintaining applications in production cloud environments (AWS or Azure)
- Hands-on experience with containerisation and orchestration using Docker and Kubernetes
- Expertise in designing and building secure, high-traffic RESTful APIs
- Practical experience writing Infrastructure as Code using Terraform
- Solid working knowledge of relational and NoSQL databases (e.g., PostgreSQL, MySQL, DynamoDB, Cosmos DB)
- Deep understanding of cloud security fundamentals (IAM, secrets management, key vaults)
- Experience setting up and maintaining CI/CD pipelines (e.g., GitLab CI, Bitbucket Pipelines, or ArgoCD)
Desirable
- Experience with event-driven architectures using Apache Kafka or similar messaging systems
- Prior exposure to performance tuning and cloud cost-optimisation strategies
- Strong automated testing practices (unit, integration, and regression testing)
- Understanding of cloud networking components (VPCs/VNets, API Gateways)
Work location
- Budapest, Hungary, HU
Related jobs
Ready to make a decision?
This role is either worth your time or it isn’t.
Analyze the posting against your experience, see the gaps clearly, and build the right materials only if the opportunity makes sense.
Nothing is submitted automatically. You choose what happens next.
About this listing
Published on Ashby under the board identifier Wearebeyondsports, which is the name the employer’s own job board carries. RoleSprint has not verified the company’s registered or trading name, so it is shown exactly as published rather than tidied up.
RoleSprint is not the employer and not a recruiter. Applications are made on the employer’s own site and never reach us; what RoleSprint does is help you decide whether a role is worth your time and prepare for it if it is.
Published 24 August 2026, last checked 28 days ago. A posting stops being advertised here 90 days after the employer published it, and one the employer takes down is marked closed rather than quietly removed.