{"id":3179037,"url":"https://alion.io/job/unionsys-technologies-java-developer-react-and-spark","title":"Java Developer (React and Spark)","company":{"id":2984,"name":"UnionSys Technologies","domain":"unionsystechnologies.com","url":"https://alion.io/company/unionsys-technologies","size_band":null,"is_staffing_agency":false,"employer_type":"direct","is_intermediary":false,"listed_via":null,"ats_vendor":null,"truth_index":null},"role":"Backend","role_family":"Backend","seniority":"senior","employment_type":null,"work_mode":"on_site","remote_scope":null,"remote_scope_basis":null,"remote_working_hours":null,"hiring_geo_confidence":"structured","locations":["Bengaluru, India","Gurgaon, India","Mumbai, India"],"countries":["IN"],"hiring_countries":[],"hiring_countries_total":0,"salary":null,"salary_estimate":{"min_usd":17000,"max_usd":40000,"period":"year","method":"role_seniority_country_remote_cell","sample_n":168},"experience_years_min":5,"visa_sponsorship":false,"relocation_package":false,"has_equity":false,"technologies":[{"name":"Apache Kafka","optional":false},{"name":"AWS","optional":false},{"name":"Azure","optional":false},{"name":"CI/CD","optional":false},{"name":"Docker","optional":false},{"name":"GCP","optional":false},{"name":"Java","optional":false},{"name":"Kubernetes","optional":false},{"name":"React.js","optional":false},{"name":"Rest API","optional":false},{"name":"Spark","optional":false},{"name":"Spring Boot","optional":false},{"name":"SQL","optional":false},{"name":"JavaScript","optional":true}],"status":"live","first_seen_at":"2026-10-23T20:36:00Z","employer_posted_date":null,"last_verified_at":"2026-10-23T20:36:00Z","board_verified":false,"closed_at":null,"days_open":3,"trust":{"level":"not_scored","repost_count":null,"flags":[],"days_open":3},"description":"UnionSys Technologies is looking for a skilled Java + React + Spark with 5+ years of experience and strong expertise inJava, Core Java, Java 8/11/17 Data Structures and Algorithms (DSA), Multithreading, Concurrency, Spring Boot, Microservices, REST APIs, Apache Spark, React.js, System Design, Scalable Application Development, SQL, Relational Databases, Kafka, Cloud Platforms (AWS, Azure, GCP), Docker, Kubernetes, CI/CD, Generative AI\n\nRequirements: \nStrong Core Java fundamentals.\nHands-on experience with Java 8/11/17 features.\nStrong knowledge of Data Structures and Algorithms.\nExpertise in multithreading and concurrency concepts.\nExperience building microservices using Spring Boot.\nREST API development experience.\nHands-on experience with Apache Spark.\nFront-end development experience using React.js .\nStrong understanding of system design and scalable application development.\nExperience working with SQL and relational databases.\nNice to Have: Kafka, Cloud Platforms (AWS/Azure/GCP), Docker and Kubernetes, CI/CD pipelines, and GenAI application exposure.\nSkills\nApache Spark, Core Java, Java, Microservices, REST, Spark, Spring Boot","description_format":"text","description_chars":1147,"description_truncated":false,"requirements":{"experience_years_min":5,"management_years_min":null,"team_size_min":null,"manages_managers":false,"education":null,"security_clearance":false,"languages":[]},"benefits":[],"hiring_locations":[],"hiring_excludes":[],"relocation_offered":false,"industries":["IT Consulting & Digital Transformation","Custom Software Development"],"lifecycle":[{"event":"open","at":"2026-10-23T20:36:00Z"}],"visa":[],"liveness":{"score":90,"band":"hot","label":"Hiring now","p_open":1,"p_active":0.903,"p_room":1,"age_days":3,"expected_fill_days":28,"reasons":["seen:3","velocity","win:early"],"computed_at":"2026-10-27T05:46:45Z"},"pay":null,"html_url":"https://alion.io/job/unionsys-technologies-java-developer-react-and-spark","json_url":"https://alion.io/job/unionsys-technologies-java-developer-react-and-spark.json","meta":{"generated_at":"2026-10-27T10:21:09Z","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_verified","counted_by":"address","units_charged":1,"used_today":11870,"day_limit":null,"remaining_today":null,"minute_limit":300,"resets_at":"2026-10-28T00:00:00Z"}},"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":2984},"rest":"https://alion.io/mcp/rest/get_company?id=2984"},"human":"https://alion.io/catalog?offer=company.slices&for=job%2Funionsys-technologies-java-developer-react-and-spark"},{"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%2Funionsys-technologies-java-developer-react-and-spark"},{"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%2Funionsys-technologies-java-developer-react-and-spark"},{"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/unionsys-technologies-java-developer-react-and-spark\", \"note\": \"what you need it for\"}"},"human":"https://alion.io/catalog?offer=company.verify&for=job%2Funionsys-technologies-java-developer-react-and-spark"}]}