{"id":3621865,"url":"https://alion.io/job/jobskey-consultancy-l3-application-support-engineer-as400","title":"L3 Application Support Engineer (AS400)","company":{"id":4455938,"name":"Jobskey Consultancy","domain":"jobskey.com","url":"https://alion.io/company/jobskey-consultancy-2","size_band":"51-200","is_staffing_agency":true,"employer_type":"agency","is_intermediary":false,"listed_via":null,"ats_vendor":"Manatal","truth_index":null},"role":"Enterprise Apps","role_family":"Enterprise Apps","seniority":null,"employment_type":null,"work_mode":"on_site","remote_scope":null,"remote_scope_basis":null,"remote_working_hours":null,"hiring_geo_confidence":"inferred","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":".NET","optional":false},{"name":"COBOL","optional":false},{"name":"Db2","optional":false},{"name":"Dynatrace","optional":false},{"name":"Java","optional":false},{"name":"SQL","optional":false},{"name":"Windows","optional":false},{"name":"C#","optional":true},{"name":"WhatsApp","optional":true}],"status":"live","first_seen_at":"2026-11-02T18:46:22Z","employer_posted_date":"2026-11-02","last_verified_at":"2026-11-14T03:44:38Z","board_verified":true,"closed_at":null,"days_open":11,"trust":{"level":"ok","repost_count":null,"flags":[],"days_open":11},"description":"We're Hiring: L3 Application Support Engineer (AS400 / .NET)\nLocation: Bangalore (Whitefield)\nExperience Levels & Vacancies:\n Senior (9+ years): 1 Position\n Mid-Level (79 years): 1 Position\nAbout the Role:\nWere seeking experienced L3 Application Support Engineers to join our enterprise IT team, with a focus on AS400-based systems and .NET/Windows environments. This is a high-impact role where youll be responsible for advanced incident resolution, root cause analysis, and ensuring application stability for critical business systems.\nKey Responsibilities:\nTroubleshoot and resolve complex issues in production environments.\nPerform root cause analysis (RCA) on recurring incidents and proactively monitor applications using Dynatrace, IBM monitoring, and system logs.\nUnderstand how applications are built, deployed, and managedincluding batch jobsand real-time integrations.\n\nDebug issues in RPG, COBOL, DB2, .NET, and Javaapplications.\n\nCollaborate with development and infra teams to escalate, resolve, and document issues.\nCreate and maintain SOP documents, training materials, and knowledge bases.\nConduct user training and communicate updates effectively across teams.\nMust-Have Skills:\nSenior Role (AS400-focused):\nDeep understanding of AS400, RPG, COBOL, DB2 SQL, and CL (Command Line).\nStrong SQL skills and log reading/interpretation.\nAbility to debug legacy code and support complex application integrations.\nMid-Level Role (.NET-focused):\nStrong expertise in Windows OS, .NET, Java, APIs, and SQL.\nFamiliarity with application architecture, trend analysis, and proactive monitoring.\nCommon Requirements:\nHigh-end troubleshooting, reasoning, and problem-solvingskills.\n\nStrong verbal and written communication skills.\nExperience with Dynatrace, IBM application monitoring tools, and real-time system support.\nPreferred Skills (Should Have):\nHands-on experience in API, Java, and .NETdevelopment/support.\n\nKnowledge of networking fundamentals.\nExperience in user training, SOP creation, and knowledge management.\nNice to Have (Secondary):\nScripting experience (any language).\nExposure to cloud-hosted applications (MPI/POD).\nWhatsApp: +91 7013663419\nEmail: \nApply now and become a key contributor in supporting mission-critical enterprise applications in a fast-paced, tech-driven environment.\n#L3Support #AS400Jobs #DotNetSupport #ApplicationSupport #RPG #COBOL #Dynatrace #WhitefieldJobs #BangaloreTech #HiringNow #Jobskey #ProductionSupport #InsuranceIT #LegacySystems 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