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Urgent! Infra Developer Job Opening In Singapore, Singapore – Now Hiring CENTRAL LIMIT TECHNOLOGY PTE. LTD.

Infra Developer



Job description

Responsibilities

  1. Participated in the development and maintenance of market data ingestion and order matching systems with nanosecond-level latency requirements, ensuring stability and performance under extreme load conditions;

  2. Engaged in performance modeling and analysis across various modules of the trading system (e.g., data path, memory access patterns, cache hit rate, context switch overhead), and drove system metrics visualization;

  3. Participated in the development and tuning of a custom network protocol stack based on DPDK, leveraging kernel bypass technologies;

  4. Contributed to the design and optimization of low-latency communication frameworks, including:

  5. Network protocol stacks (TCP/UDP, WebSocket, HTTP/2);

  6. Inter-process/thread communication (shared memory, lock-free ring buffers);

  7. User-space timestamp precision and synchronization mechanisms;

  8. Monitored performance hotspots in the Linux kernel and studied their impact on low-latency trading (e.g., in the scheduler, network stack, and I/O subsystems), followed by targeted optimizations based on CPU microarchitecture characteristics.

Requirements

Fundamental & General Skills

  • Proficient in modern C++ (C++17/20) with strong system-level high-performance programming skills (e.g., cache-friendly data structure design, zero-copy data pipelines, CPU affinity binding);

  • Solid understanding of CPU architecture (x86_64), cache hierarchy, branch prediction, pipeline stalls, and other hardware-level behaviors;

  • In-depth experience in at least one of the following areas:

  • Analysis and optimization of core Linux kernel components such as the network stack, scheduler, and memory subsystem;

  • CPU microarchitecture analysis using tools like perf, Intel VTune, or the Top-Down analysis method;

  • SIMD vectorization (e.g., AVX2/AVX512) or custom assembly-level optimization;

  • Development of system-level latency profiling or microbenchmark toolchains;

Networking & Protocol Stack Development

  • Deep understanding of the WebSocket protocol with the ability to implement custom frame parsing and construction;

  • Familiarity with I/O multiplexing mechanisms like epoll and io_uring;

  • Experience independently building high-performance WebSocket or FIX/SBE protocol clients;

  • Experience with at least one user-space network stack technology such as netmap or DPDK;

High-Frequency Trading & Data Processing

  • Familiar with tick data processing workflows in high-frequency trading environments, including market data reconstruction and reordering mechanisms;

  • Knowledge of PTP/TSC synchronization and system clock stability tuning;

  • Candidates with knowledge of the network topologies and direct connectivity latency characteristics of major global exchanges will be preferred.

Bonus Points

  • Hands-on experience in end-to-end trading system latency optimization (from drivers, interrupts, protocol framing to user-space scheduling);

  • Proficiency with performance analysis tools such as perf, ftrace, bpftrace, VTune, and cachegrind;

  • Experience designing and tuning in-house user-space lock-free message queues or shared memory pools.


Required Skill Profession

Other General



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