{"id":1242771,"url":"https://alion.io/job/tangspac-consulting-java-developer-contract","title":"Java Developer (Contract)","company":{"id":3802168,"name":"Tangspac Consulting","domain":"tangspac.com","url":"https://alion.io/company/tangspac-consulting","size_band":null,"is_staffing_agency":true,"employer_type":"agency","is_intermediary":false,"listed_via":null,"ats_vendor":null,"truth_index":null},"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":["Singapore"],"countries":["SG"],"hiring_countries":[],"hiring_countries_total":0,"salary":{"min":4500,"max":7000,"currency":"SGD","period":"month","gross":true,"usd_annual":65772},"salary_estimate":null,"experience_years_min":5,"visa_sponsorship":false,"relocation_package":false,"has_equity":false,"technologies":[{"name":"AWS","optional":false},{"name":"CI/CD","optional":false},{"name":"Docker","optional":false},{"name":"Git","optional":false},{"name":"Java","optional":false},{"name":"Jenkins","optional":false},{"name":"Jira","optional":false},{"name":"JUnit","optional":false},{"name":"Maven","optional":false},{"name":"Mockito","optional":false},{"name":"MySQL","optional":false},{"name":"Rest API","optional":false},{"name":"Spring Boot","optional":false},{"name":"SQL","optional":false},{"name":"Terraform","optional":false},{"name":"Kotlin","optional":true}],"status":"live","first_seen_at":"2026-09-23T00:00:00Z","employer_posted_date":null,"last_verified_at":"2026-09-23T00:00:00Z","board_verified":false,"closed_at":null,"days_open":4,"trust":{"level":"not_scored","repost_count":null,"flags":[],"days_open":4},"description":"Responsibilities:\nDesign, develop, and maintain scalable backend systems for high-volume transaction processing and international payment gateway integrations.\nDevelop secure and high-performance APIs for internal and external system integration.\nWrite clean, maintainable, and testable code following engineering best practices.\nContributes to architecture design for scalable, resilient, and fault-tolerant systems.\nImplement event-driven and asynchronous processing for backend services.\nSupport integration across multiple internal and external platforms.\nDesign and implement message-driven architectures using enterprise messaging systems.\nOptimize application, database, and service-level performance.\nPerform load testing and identify system bottlenecks.\nTroubleshoot production issues and perform root cause analysis (RCA).\nEnsure system stability and reliability in high-throughput environments.\nWork closely with DevOps teams to support CI/CD pipeline implementation.\nManage build, deployment, and release processes across environments.\nRequirements:\nBachelor’s degree in computer science, software engineering, or a related field.\n5-7 years of experience in Java backend development.\nStrong proficiency in Java 8+ (preferably Java 21) and Spring Boot.\nProven experience with microservices architecture, event-driven architecture, and REST API development.\nHands-on experience with messaging systems, preferably Solace.\nStrong experience with MySQL, including database tuning, SQL optimization, indexing, and query tuning.\nExperience with unit testing frameworks such as JUnit and Mockito.\nProficiency in Maven, Git, Jira, and Jenkins-based CI/CD pipelines.\nExperience in load testing, performance testing, and backend optimization.\nStrong troubleshooting and debugging capabilities, including production issue resolution and root cause analysis.\nProven experience in e-commerce, banking, or other high-volume transaction environments.\nStrong experience building distributed, scalable, and high-availability systems.\nHands-on experience implementing microservices and event-driven architecture in production environments.\nExperience handling performance-critical and real-time backend systems.\nDemonstrated ability to work in production support and critical incident resolution environments.\nHands-on experience with AWS, Docker, and Terraform will be an added advantage.\nSkills\nSQL Database, Back-End Systems, Computer Engineering, Database Tuning, Test Engineering, Load Testing, External Support, Spring Boot, JIRA, Messaging Services, Event-Driven Architecture (EDA), Junit Tests, Scalable Architecture, API Security, transaction systems, Messaging Frameworks","description_format":"text","description_chars":2674,"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":[],"lifecycle":[{"event":"open","at":"2026-09-25T16:15:06Z"}],"liveness":{"score":52,"band":"ok","label":"Likely open","p_open":1,"p_active":0.516,"p_room":1,"age_days":3,"expected_fill_days":24,"reasons":["seen:3","agency","win:early"],"computed_at":"2026-09-26T05:45:00Z"},"pay":{"stated_usd_annual":65772,"is_top_pay":false},"html_url":"https://alion.io/job/tangspac-consulting-java-developer-contract","json_url":"https://alion.io/job/tangspac-consulting-java-developer-contract.json","meta":{"generated_at":"2026-09-27T05:01:35Z","cache_seconds":300,"methodology":"https://alion.io/methodology","terms":"https://alion.io/terms","contact":"https://alion.io/contact","api":"https://alion.io/developers","usage":{"tier":"crawler","counted_by":"address","units_charged":1,"used_today":4395,"day_limit":5000,"remaining_today":605,"minute_limit":60,"resets_at":"2026-09-28T00:00:00Z"}}}