{"id":1822060,"url":"https://alion.io/job/high-5-games-social-server-senior-java-developer","title":"Social Server Senior Java Developer","company":{"id":2271359,"name":"High 5 Games","domain":"high5games.com","url":"https://alion.io/company/high5games","size_band":"51-200","is_staffing_agency":false,"employer_type":"direct","is_intermediary":false,"listed_via":null,"ats_vendor":"BambooHR","truth_index":{"grade":"A","score":88,"open_postings":10,"ghost_share":0,"stale_share":0.5,"repost_share":0,"time_to_fill_p50_days":null,"computed_at":"2026-10-06T05:45:30Z"}},"role":"Backend","role_family":"Backend","seniority":"senior","employment_type":"contractor","work_mode":"on_site","remote_scope":null,"remote_scope_basis":null,"remote_working_hours":null,"hiring_geo_confidence":"structured","locations":[],"countries":[],"hiring_countries":[],"hiring_countries_total":0,"salary":null,"salary_estimate":null,"experience_years_min":null,"visa_sponsorship":false,"relocation_package":false,"has_equity":false,"technologies":[{"name":"Java","optional":false},{"name":"Machine Learning","optional":false},{"name":"Rest API","optional":false},{"name":"Spring Boot","optional":false},{"name":"BigQuery","optional":true},{"name":"Cassandra","optional":true},{"name":"CI/CD","optional":true},{"name":"Datadog","optional":true},{"name":"Docker","optional":true},{"name":"GCP","optional":true},{"name":"Google BigQuery","optional":true},{"name":"Google Bigtable","optional":true},{"name":"Gradle","optional":true},{"name":"Jenkins","optional":true},{"name":"Kubernetes","optional":true},{"name":"LLM","optional":true},{"name":"MySQL","optional":true},{"name":"OpenAI Codex","optional":true},{"name":"SQL","optional":true}],"status":"live","first_seen_at":"2026-03-23T00:00:00Z","employer_posted_date":"2026-03-23","last_verified_at":"2026-10-06T21:15:29Z","board_verified":true,"closed_at":null,"days_open":197,"trust":{"level":"stale","repost_count":0,"flags":["stale"],"days_open":197},"description":"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.\nTechnical expertise - Architecture & Systems Development\nDeep expertise in and experience with Java server side development (6 years+), real time distributed systems, both monolithic and micro services architectures.\n5+ years of design and delivery of high volume highly available back end infrastructures - Telcos / Trading / AdTech systems, etc. Understanding of enterprise architecture patterns.\nExperience of REST API design and implementation (preferred frameworks: Dropwizard, Spring Boot 2.5+)\nGaming or Equity trading server side experience is a plus\nExperience delivering systems at large scale (20K+ mps) using modern streaming systems and distributed data systems (preferred google pub/sub, kafka, hazelcast)\nUnderstanding of the Distributed System Concepts: Leadership, Consensus, In-Sync Replicas, Partitioning\n6+ years of hands on Java development, strong familiarity with Java 8/11/17+\nStrong understanding of key security concepts and patterns\nGood understanding of enterprise and mobile facing systems architecture\nDeveloping and implementing unit, integration, and system tests to ensure the quality and reliability of the code; understanding and applying various testing methodologies (TDD, BDD)\nAbility 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.\nWide experience in Identifying, diagnosing, and resolving complex technical issues in a timely and efficient manner; strong debugging skills and effective troubleshooting production issues.\nThe team has unlimited company provided access and is using LLM tooling in daily work (cursor, cursor cli, codex cli, gemini, etc.) however these aretreated as tools and code quality responsibility layers with team membersindependent of tool used.\nTechnical expertise - Data Management\nExperience with SQL and No-SQL DBs, specifically with Cassandra and MySQL\nFamiliarity with cloud-based Big Data tools (gcp preferred: bigQuery, bigTable).\nFamiliarity with Real Time Stream Analysis (preferred: gcp Dataflow)\nSystems Operational maturity\nExperience building operationally mature, well instrumented, very highly scalable, highly available, secure systems\nExperience with Build Automation Tools: Gradle, Jenkins, Nexus, Docker Image Repositories\nExperience with Google Cloud Platform, Kubernetes, Docker, DataDog, Stackdriver\nExcellent understanding of SDLC, Java development and continuous integration best practices.\nWriting clear and concise documentation for code, APIs, and processes\nSoft SkillSet\nCollaborating effectively with other developers, designers, testers, and stakeholders to ensure successful project delivery.\nParticipating in project planning and estimation activities, providing realistic timelines and resource requirements\nKeeping up-to-date with the latest Java technologies, frameworks, and best practices.\nEducation\nBS in Computer Science, Engineering or equivalent. MS in CS or Engineering is a big plus.","description_format":"text","description_chars":3605,"description_truncated":false,"requirements":{"experience_years_min":null,"management_years_min":null,"team_size_min":null,"manages_managers":false,"education":{"level":"bachelor","optional":false},"security_clearance":false,"languages":[]},"benefits":["Equity"],"hiring_locations":[],"hiring_excludes":[],"relocation_offered":false,"industries":["Gaming","iGaming & Gambling"],"lifecycle":[{"event":"open","at":"2026-10-04T06:58:52Z"}],"visa":[],"liveness":{"score":5,"band":"cold","label":"Long shot","p_open":1,"p_active":0.193,"p_room":0.28,"age_days":197,"expected_fill_days":40,"reasons":["conf:1","stale_co","win:tail","crowd:"],"computed_at":"2026-10-06T05:45:30Z"},"pay":null,"html_url":"https://alion.io/job/high-5-games-social-server-senior-java-developer","json_url":"https://alion.io/job/high-5-games-social-server-senior-java-developer.json","meta":{"generated_at":"2026-10-06T23:09:31Z","cache_seconds":300,"methodology":"https://alion.io/methodology","terms":"https://alion.io/terms","contact":"https://alion.io/contact","api":"https://alion.io/developers","about":"Alion is a live layer of people, companies and AI agents: who they are, whether they are real and active right now, what they do and how to work with them, readable by people and by agents and paid per call.","catalog":"https://alion.io/catalog.json","usage":{"tier":"crawler","counted_by":"address","units_charged":1,"used_today":4252,"day_limit":5000,"remaining_today":748,"minute_limit":60,"resets_at":"2026-10-07T00:00:00Z"}},"offers":[{"id":"company.slices","title":"One company in depth, by slice","status":"live","price":{"credits":0.02,"usd":0.002,"plus_per_slice":{"credits":0.05,"usd":0.005}},"unit":"per company, plus each slice with data","note":"the employer in depth","call":{"mcp_tool":"get_company","arguments":{"id":2271359},"rest":"https://alion.io/mcp/rest/get_company?id=2271359"},"human":"https://alion.io/catalog?offer=company.slices&for=job%2Fhigh-5-games-social-server-senior-java-developer"},{"id":"market.stats","title":"A market slice: pay, demand and time to fill","status":"live","price":{"credits":1,"usd":0.1},"unit":"per slice","note":"pay, demand and time to fill for this role and place","call":{"mcp_tool":"market_stats"},"human":"https://alion.io/catalog?offer=market.stats&for=job%2Fhigh-5-games-social-server-senior-java-developer"},{"id":"job.search","title":"Open jobs by role, technology, place, pay and visa","status":"live","price":{"credits":0.02,"usd":0.002},"unit":"per posting in a list","note":"similar open postings","call":{"mcp_tool":"search_jobs"},"human":"https://alion.io/catalog?offer=job.search&for=job%2Fhigh-5-games-social-server-senior-java-developer"},{"id":"company.verify","title":"Is this company real and active right now","status":"pilot","price":null,"unit":"per company","request":{"url":"https://alion.io/catalog/request","method":"POST","body":"{\"offer\": \"company.verify\", \"for\": \"job/high-5-games-social-server-senior-java-developer\", \"note\": \"what you need it for\"}"},"human":"https://alion.io/catalog?offer=company.verify&for=job%2Fhigh-5-games-social-server-senior-java-developer"}]}