Low-Latency / Trading Systems Developer Recruiters

No upfront fee
Pay only if you hire
Technology only
We reach engineers who aren't on job boards
Replacement guarantee on standard searches

HFT DeveloperC++ Trading EngineerMarket Data EngineerHFT DeveloperC++ Trading EngineerMarket Data Engineer

What this hire really comes down to

Low-latency developers operate at the intersection of high-performance computing and real-time financial data, where execution speed is measured in microseconds. Their work focuses on stripping away the abstractions typical of general-purpose software to reach hardware-level efficiency. This role is inherently experimental and demanding, requiring deep knowledge of the Linux kernel, memory management, and modern C++ features. Every byte of memory allocated and every CPU cycle spent must be justified by the requirements of the trading algorithm.

The technical scope encompasses building exchange connectivity, optimizing networking stacks for kernel-bypass, and implementing lock-free data structures that minimize contention in multithreaded environments. This requires an obsessive focus on performance tuning, where the developer must be comfortable working close to the hardware. Success is defined by the ability to ship code that is both resilient under extreme load and statistically faster than the competition, ensuring that the firm's trading strategies execute with precision.

What we check before you see anyone

Modern C++ Proficiency
The candidate must demonstrate mastery of C++17 and C++20 standards, particularly regarding memory management and template meta-programming. We evaluate their ability to write code that avoids dynamic allocation during critical execution paths. This check verifies that the developer understands the performance cost of modern language features and can use the language effectively to write code that is both maintainable and extremely fast.
Lock-Free Synchronization
Developing for low latency requires a deep understanding of memory ordering and atomic operations to avoid the performance penalties associated with traditional mutexes and locks. Candidates must provide examples of how they have implemented thread-safe, lock-free queues or circular buffers. We look for evidence that they understand the underlying hardware architecture and cache coherency protocols to avoid unnecessary synchronization overhead in multithreaded systems.
Kernel-Bypass Networking
Candidates are screened on their knowledge of high-performance networking, including experience with libraries or techniques that bypass the standard operating system network stack. This includes understanding Ethernet frame processing and packet handling at the NIC level. We prioritize experience that demonstrates an ability to minimize latency by controlling how data flows from the network interface to the application with minimal kernel intervention.
Exchange Connectivity
Success in trading systems requires a thorough understanding of the FIX protocol and binary exchange protocols. We evaluate the candidate’s experience in implementing order entry systems and market data handlers that must parse high-volume feeds in real-time. The candidate should be able to explain how they handle network jitter and ensure that their systems process incoming updates with the lowest possible variance in latency.
Performance Profiling
We require evidence that the candidate can effectively use low-level profiling tools to identify bottlenecks. This includes experience with hardware counters, CPU pinning, and cache performance analysis. A red flag is a candidate who relies solely on application-level logging for performance troubleshooting, as this often introduces significant latency and ignores the critical performance characteristics of the underlying CPU and memory subsystem.
Mathematical and Algorithmic Rigor
Trading systems developers must translate complex mathematical models into efficient, deterministic code. We evaluate their history of participating in environments where correctness and efficiency are both critical, such as competitive programming or quantitative research teams. This check ensures the candidate can handle the intense logical pressure of financial markets while maintaining the structural integrity of the high-performance trading engine.

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Where we find them

Our sourcing is concentrated on engineers who have spent their careers in proprietary trading firms, investment banks, and market-making environments where performance is the product. We actively seek out contributors to C++ standards and enthusiasts who attend technical gatherings focused on low-level system design. These professionals often possess the specific experience of working with hardware-bound constraints that are not present in typical enterprise software development.

We also recruit high-performers from the competitive programming circuit, where individuals have demonstrated the ability to solve algorithmic problems under extreme time and resource constraints. Additionally, we target systems engineers from sectors like aerospace or telecommunications that require high-throughput data processing and real-time responsiveness. These pools provide candidates with the rare combination of mathematical aptitude and systems-level expertise needed for success in a competitive trading environment.

Mistakes we see

Treating a credential as the answer
Do not let modern c++ proficiency become a keyword filter. This check verifies that the developer understands the performance cost of modern language features and can use the language effectively to write code that is both maintainable and extremely fast.
Leaving the actual scope out
Put the responsibility for lock-free synchronization in the brief, including who helps the hire and who decides. Developing for low latency requires a deep understanding of memory ordering and atomic operations to avoid the performance penalties associated with traditional mutexes and locks.
Waiting until the offer to discuss the work
Discuss what the person will own in kernel-bypass networking before the interview loop. We prioritize experience that demonstrates an ability to minimize latency by controlling how data flows from the network interface to the application with minimal kernel intervention.

The search in three steps

Agree the brief
The interview process for trading systems is highly technical and performance-focused. We begin with a deep dive into the candidate’s previous experience with C++ and their understanding of hardware-level optimization. We present specific scenarios regarding lock-free programming or network latency, asking the candidate to propose solutions that optimize for throughput and determinism. The focus is on the reasoning behind every memory allocation and context switch.
Find and speak with people
Later rounds involve collaborative sessions where the candidate works through real-world trading infrastructure challenges. We examine their ability to write production-ready code that adheres to strict performance constraints. The final stages focus on the candidate’s alignment with the team's relentless focus on performance and their ability to operate within the difficult, high-intensity environment that defines our trading systems engineering culture.
Introduce the people who fit
We send a written brief on each person you meet, including why the work fits and the questions still worth asking about mathematical and algorithmic rigor. You decide who to interview. We help with the conversations through the offer.

Questions about this search

When will we see a shortlist?

We agree the search plan after checking your requirements for modern c++ proficiency and lock-free synchronization, rather than promising a date before the brief is clear. The candidate must demonstrate mastery of C++17 and C++20 standards, particularly regarding memory management and template meta-programming.

What if a candidate gets a counteroffer?

We ask what would make someone leave work involving modern c++ proficiency, and what could make them stay. Before you invest in interviews, we discuss whether your offer changes the problem they want to leave, including the responsibility for mathematical and algorithmic rigor.

Should this role be remote or on site?

Experience with modern c++ proficiency and lock-free synchronization does not settle the location question. Tell us what access and supervision the work needs, including who owns decisions about mathematical and algorithmic rigor, so we approach people who can accept the arrangement.

How will you check fit before we interview?

The candidate must demonstrate mastery of C++17 and C++20 standards, particularly regarding memory management and template meta-programming. We evaluate their ability to write code that avoids dynamic allocation during critical execution paths. Developing for low latency requires a deep understanding of memory ordering and atomic operations to avoid the performance penalties associated with traditional mutexes and locks.

How does the fee work?

No upfront fee. You pay only if you hire. Agree the fee and the responsibilities covering modern c++ proficiency and lock-free synchronization in the recruiting agreement before the search proceeds.

What if the hire does not work out?

We offer a candidate replacement guarantee on standard search agreements. The applicable period and exact terms are set out in the signed client recruiting agreement. Make sure the agreed scope includes what you expect of mathematical and algorithmic rigor, rather than leaving that discussion until after the start.

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