Social Server Senior Java Developer
This is the employer's own posting, not a copy on a job board.
What we know
Is it still open?
Confirmed still open
Last checked 13h ago — checked against the employer's own applicant tracking system, which is the company answering directly.
We re-read the employer's own applicant tracking system and the posting was still there. That is the company answering directly.
How old is it?
Posted 195d ago
The date the source published, not the day we noticed it (2026-03-23). Last seen at its source 3h ago.
Is it remote?
Marked remote on the employer's board
Their board carries a remote setting on this posting — a field they filled in, not wording we read. The location field names somewhere specific, which is usually where the team or the entity sits.
Who may apply?
Bulgaria
The description states no restriction of its own. This is the source's own tag.
Pay not stated
Similar roles pay €77.0k–84.8k/yr
Middle 50% of 9 listings that do state pay — Engineering · all levels · Bulgaria · EUR/year. This employer has published no salary; this is what comparable listings we hold disclose, never converted between currencies or periods. How this is calculated.
Skills named in the ad
Recognised terms only, from a fixed vocabulary — this is what CV matching compares against.
Carried by 1 source
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bamboohr employer's own board first seen 13h ago · last seen 3h ago
The listing
The Senior Java Developer will be joining a team of top server engineers that design and build the heart of H5G games and product platform. The right candidate will be challenged to help propel H5G to the top tier of social gaming through adoption and application of the latest in the Server side, Big Data and AI technology, such as high scalable cloud based infrastructure, stream analysis and machine learning. The person will be a key contributor to aspects of design and delivery of all H5G Server Systems, Services and Data Stores.
Technical expertise – Architecture & Systems Development
Deep expertise in and experience with Java server side development (6 years+), real time distributed systems, both monolithic and micro services architectures.
- 5+ years of design and delivery of high volume highly available back end infrastructures – Telcos / Trading / AdTech systems, etc. Understanding of enterprise architecture patterns.
- Experience of REST API design and implementation (preferred frameworks: Dropwizard, Spring Boot 2.5+)
- Gaming or Equity trading server side experience is a plus
- Experience delivering systems at large scale (20K+ mps) using modern streaming systems and distributed data systems (preferred google pub/sub, kafka, hazelcast)
- Understanding of the Distributed System Concepts: Leadership, Consensus, In-Sync Replicas, Partitioning
- 6+ years of hands on Java development, strong familiarity with Java 8/11/17+
- Strong understanding of key security concepts and patterns
- Good understanding of enterprise and mobile facing systems architecture
- Developing and implementing unit, integration, and system tests to ensure the quality and reliability of the code; understanding and applying various testing methodologies (TDD, BDD)
- Ability to analyze and optimize application performance, identify bottlenecks, and implement solutions to improve speed and efficiency. This often involves profiling and tuning database queries, application code, and infrastructure.
- Wide experience in Identifying, diagnosing, and resolving complex technical issues in a timely and efficient manner; strong debugging skills and effective troubleshooting production issues.
- The team has unlimited company provided access and is using LLM tooling in daily work (cursor, cursor cli, codex cli, gemini, etc.) however these are treated as tools and code quality responsibility layers with team members independent of tool used.
Technical expertise - Data Management
- Experience with SQL and No-SQL DBs, specifically with Cassandra and MySQL
- Familiarity with cloud-based Big Data tools (gcp preferred: bigQuery, bigTable).
- Familiarity with Real Time Stream Analysis (preferred: gcp Dataflow)
Systems Operational maturity
- Experience building operationally mature, well instrumented, very highly scalable, highly available, secure systems
- Experience with Build Automation Tools: Gradle, Jenkins, Nexus, Docker Image Repositories
- Experience with Google Cloud Platform, Kubernetes, Docker, DataDog, Stackdriver
- Excellent understanding of SDLC, Java development and continuous integration best practices.
- Writing clear and concise documentation for code, APIs, and processes
Soft SkillSet
- Collaborating effectively with other developers, designers, testers, and stakeholders to ensure successful project delivery.
- Participating in project planning and estimation activities, providing realistic timelines and resource requirements
- Keeping up-to-date with the latest Java technologies, frameworks, and best practices.
Education
- BS in Computer Science, Engineering or equivalent. MS in CS or Engineering is a big plus.