Sustaining Software Engineer - Distributed Storage

Arcfra Pte. Ltd.; Singapore; On-site; SGD 90,000 - 130,000; Full time

Job summary

Arcfra Pte. Ltd. is seeking a Sustaining Software Engineer with a strong background in distributed systems, storage technologies, and C/C++ development.

In this hands-on role, you will maintain and improve production-grade storage products, investigate complex defects, and craft reliable fixes while collaborating with support, QA, and engineering teams to ensure reliability. The ideal candidate will thrive on mature systems, understand production behavior, and confidently debug across multiple

Qualifications

• Bachelor's degree or higher in Computer Science, Computer Engineering, Software Engineering, or related field.
• Strong programming experience in C or C++.
• Solid understanding of data structures, algorithms, multithreading, memory management, and network programming.
• Practical experience with Linux systems and Linux debugging tools.
• Good understanding of distributed systems concepts such as replication, consistency, consensus, fault tolerance, distributed state management, and failure recovery.
• Experience with storage technologies such as distributed storage systems, block/file/object storage, storage virtualization, RAID/snapshots/replication, or NVMe/SCSI/networked storage.

Responsibilities

• Maintain and improve distributed storage and data infrastructure products.
• Investigate and resolve customer-reported product issues, including performance degradation, service interruptions, data-path failures, and unexpected system behavior.
• Reproduce production issues in lab/test environments and identify root causes.
• Develop, review, test, and deliver high-quality bug fixes using C or C++.
• Analyze system logs, core dumps, stack traces, performance metrics, and storage-related diagnostic information.
• Troubleshoot issues involving distributed systems, storage engines, networking, operating systems, concurrency, and hardware interactions.
• Work closely with customer support and field engineering teams to collect technical information and provide troubleshooting guidance.
• Collaborate with product development teams on defects, architectural improvements, and product reliability.
• Create diagnostic tools, scripts, test cases, and internal documentation to improve troubleshooting efficiency.
• Participate in product release validation and ensure fixes are backported to supported product versions.
• Contribute to improving product observability, serviceability, stability, and maintainability.

Skills

C/C++ programming

Multithreading

Memory management

Network programming

Distributed systems concepts

English & Chinese communication

Education

Bachelor's degree in CS/CE/SE or related field

Tools

GDB

strace

Perf

Job description

Arcfra is looking for a Sustaining Software Engineer with a strongbackground in distributed systems, storage technologies, andC/C++ development.

In this role, you will be responsible for maintaining andimproving our production-grade storage products. You willinvestigate complex software defects, troubleshootcustomer-reported issues, develop reliable fixes, and workclosely with support, QA, and engineering teams to ensure productstability.

This is a hands-on engineering position. It combines softwaredevelopment, production troubleshooting, root-cause analysis, andcustomer issue resolution. The ideal candidate enjoys working onmature and complex systems, understands how software behaves inreal-world production environments, and is comfortable debuggingproblems across multiple layers of the system.

Key Responsibilities

• Maintain and improve distributed storage and data infrastructureproducts.
• Investigate and resolve customer-reported product issues,including performance degradation, service interruptions,data-path failures, and unexpected system behavior.
• Reproduce production issues in laboratory or test environmentsand identify their root causes.
• Develop, review, test, and deliver high-quality bug fixes usingC or C++.
• Analyze system logs, core dumps, stack traces, performancemetrics, and storage-related diagnostic information.
• Troubleshoot issues involving distributed systems, storageengines, networking, operating systems, concurrency, andhardware interactions.
• Work closely with customer support and field engineering teamsto collect technical information and provide troubleshootingguidance.
• Collaborate with product development teams on complex defects,architectural improvements, and product reliability.
• Create diagnostic tools, scripts, test cases, and internaldocumentation to improve troubleshooting efficiency.
• Participate in product release validation and ensure fixes aresafely backported to supported product versions.
• Contribute to improving product observability, serviceability,stability, and maintainability.

Required Qualifications

• Bachelor's degree or above in Computer Science, ComputerEngineering, Software Engineering, or a related field.
• Strong programming experience in C or C++.
• Solid understanding of data structures, algorithms,multithreading, memory management, and network programming.
• Practical experience with Linux systems and Linux debuggingtools.
• Good understanding of distributed systems concepts, such asreplication, consistency, consensus, fault tolerance,distributed state management, and failure recovery.
• Experience with one or more storage technologies, such as:
  • Distributed storage systems
  • Block, file, or object storage
  • Storage virtualization
  • RAID, snapshots, replication, or data protection
  • Local file systems or storage engines
  • NVMe, SCSI, iSCSI, Fibre Channel, or NVMe over Fabrics
• Strong troubleshooting and root-cause analysis skills.
• Ability to read and understand a large and mature codebase.
• Ability to communicate technical findings clearly in writtenand spoken English and Chinese.
• Willingness to work directly with customer-facing teams oncomplex production issues.
• Must be a Singapore citizen, permanent resident, or hold avalid Singapore work permit.

Preferred Qualifications

• Experience developing or maintaining distributed storageproducts.
• Experience with Ceph, SPDK, RocksDB, LevelDB, distributeddatabases, or similar infrastructure software.
• Familiarity with Linux kernel storage, device drivers, filesystems, or networking subsystems.
• Experience analyzing core dumps with GDB and diagnosing memorycorruption, deadlocks, race conditions, and performancebottlenecks.
• Experience with observability and diagnostic tools such as perf,eBPF, Valgrind, AddressSanitizer, strace, SystemTap, or similartools.
• Familiarity with Python, Bash, or other scripting languages fortesting and automation.
• Experience in enterprise infrastructure, cloud platforms,hyper-converged infrastructure, or data centre products.
• Previous experience in sustaining engineering, escalationengineering, product support engineering, or site reliabilityengineering.

What We Value

• A strong sense of ownership and responsibility for productquality.
• Patience and persistence when investigating difficult technicalproblems.
• The ability to distinguish symptoms from root causes.
• A practical engineering mindset focused on reliable andmaintainable solutions.
• The ability to work effectively across engineering, QA,support, and customer-facing teams.
• A willingness to understand both the product source code andthe customer's production environment.