{"id":3671860,"url":"https://alion.io/job/arcfra-sustaining-software-engineer-virtualization-and-cloud-platform","title":"Sustaining Software Engineer – Virtualization and Cloud Platform","company":{"id":4402062,"name":"Arcfra","domain":"arcfra.com","url":"https://alion.io/company/arcfra","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":"full_time","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":13000,"max":25000,"currency":"SGD","period":"month","gross":true,"usd_annual":234576},"salary_estimate":null,"experience_years_min":8,"visa_sponsorship":false,"relocation_package":false,"has_equity":false,"technologies":[{"name":"KVM","optional":false},{"name":"Linux","optional":false},{"name":"Python","optional":false},{"name":"Rest API","optional":false},{"name":"Grafana","optional":true},{"name":"OpenStack","optional":true},{"name":"Prometheus","optional":true},{"name":"SRE","optional":true},{"name":"Tcpdump","optional":true}],"status":"live","first_seen_at":"2026-11-03T00:00:00Z","employer_posted_date":null,"last_verified_at":"2026-11-03T00:00:00Z","board_verified":false,"closed_at":null,"days_open":4,"trust":{"level":"not_scored","repost_count":null,"flags":[],"days_open":4},"description":"About the Role\nArcfra is looking for a Sustaining Software Engineer with experience in virtualization, cloud infrastructure, and software development using Python or Go.\nYou will be responsible for maintaining and improving our virtualization and cloud platform products. The role focuses on troubleshooting production issues, resolving customer-reported defects, developing software fixes, and improving the reliability and serviceability of the platform.\nThis is not a traditional technical support role. You will work directly with source code, system logs, APIs, operating systems, virtualization components, and distributed cloud services. You will collaborate with support engineers, field teams, QA, and core development teams to diagnose complex issues and deliver production-quality solutions.\nKey Responsibilities\nMaintain and improve virtualization and cloud platform products.\nInvestigate customer-reported issues involving virtual machines, hosts, clusters, networking, storage, orchestration, and management services.\nReproduce production issues and perform detailed root-cause analysis.\nDevelop, test, review, and deliver bug fixes using Python or Go.\nTroubleshoot problems across application, service, operating system, virtualization, networking, and storage layers.\nAnalyze logs, traces, metrics, API requests, service states, database records, and system configurations.\nDiagnose issues involving virtual machine lifecycle management, scheduling, high availability, live migration, resource management, and cluster operations.\nWork closely with technical support and field engineering teams to resolve complex customer escalations.\nProvide technical guidance, workarounds, diagnostic procedures, and corrective actions for production issues.\nCollaborate with core engineering teams on architectural defects and long-term product improvements.\nDevelop scripts, diagnostic tools, automated tests, and troubleshooting utilities.\nImprove product monitoring, logging, observability, upgradeability, and operational reliability.\nParticipate in release validation and safely backport fixes to supported product versions.\nWrite clear technical documentation, root-cause analysis reports, and internal knowledge-base articles.\nRequired Qualifications\nBachelor's degree or above in Computer Science, Computer Engineering, Software Engineering, or a related field.\nProfessional software development experience using Python or Go.\nStrong Linux administration and troubleshooting skills.\nSolid understanding of operating systems, processes, threads, networking, storage, and distributed services.\nExperience with virtualization technologies or cloud infrastructure.\nFamiliarity with one or more of the following:KVM and QEMUlibvirtVMware vSphere or ESXiOpenStackContainer runtimesCloud management platformsHyper-converged infrastructure\nExperience troubleshooting REST APIs, background services, or distributed control-plane components.\nStrong debugging, problem-solving, and root-cause analysis skills.\nAbility to understand and modify an existing production codebase.\nAbility to communicate technical findings clearly in written and spoken English and Chinese.\nWillingness to work with customer-facing teams on complex production incidents.\nMust be a Singapore citizen, permanent resident, or hold a valid Singapore work permit.\nPreferred Qualifications\nExperience developing or maintaining virtualization, cloud management, or infrastructure software.\nUnderstanding of virtual machine lifecycle management, CPU and memory virtualization, virtual networking, and virtual storage.\nFamiliarity with high availability, live migration, cluster scheduling, resource management, and failure recovery.\nFamiliarity with Linux networking, Open vSwitch, bridges, VLANs, VXLAN, routing, and software-defined networking.\nExperience with storage protocols or systems used by virtualization platforms.\nExperience with diagnostic and observability tools such as GDB, strace, tcpdump, perf, Prometheus, Grafana, or distributed tracing systems.\nExperience writing automated tests, integration tests, and troubleshooting tools.\nPrevious experience in sustaining engineering, escalation engineering, product support engineering, site reliability engineering, or cloud operations.\nWhat We Value\nStrong ownership of customer-impacting technical problems.\nThe ability to troubleshoot systematically across multiple layers.\nA software engineering approach to product maintenance and customer support.\nAttention to backward compatibility, upgrade safety, and production reliability.\nClear communication during complex or high-priority incidents.\nThe ability to balance short-term customer recovery with long-term engineering improvements.\nSkills\nVMware ESX Servers, Computer Engineering, Storage Architecture, Linux KVM, Cloud Storage, Cloud Foundry, Root Cause Analysis, Bug Fixing, OpenStack, Linux Administration, Analytical and Problem-Solving Skills, Log Analysis, Liaise With Technical Teams, Python, Rest Apis, Resource Management, Virtualization Technology, Virtualization Platform","description_format":"text","description_chars":5073,"description_truncated":false,"requirements":{"experience_years_min":8,"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":["Artificial Intelligence","Information Technology","Cloud Platforms (IaaS & 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