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# Senior C++ Engineer

- **Company:** WhyHireWrong?
- **Location:** Greater London, UK (Remote available)
- **Experience:** Expert
- **Contract:** Permanent contract
- **Skills:** Artificial Intelligence, C++ (Programming Language), Profiling, Computer Programming, Data Infrastructure, Data Structures, Data Systems, Multicasting, Low Latency, Production Code, C++14
- **Published:** September 8, 2026
- **Apply:** https://www.collegerecruiter.com/job/2840619695-senior-c-engineer

## About the Role

* ~6+ years of professional C++ engineering in production low-latency systems
 * Modern C++: C++17 minimum, C++20 preferred
 * Low-latency experience from traditional financial services: proprietary trading firm, market-maker, HFT shop, investment-bank e-trading desk, or systematic hedge fund
 * Direct market-data, feed-handler, or electronic-trading exposure
 * Hands-on with lock-free programming, multicast, low-level networking, and performance profiling
 * Comfortable with fully remote work and a 12-month contract structure, * Low-latency C++ experience derived solely from crypto exchanges or crypto market-makers (traditional trading backgrounds required)
 * Purely academic or research C++ with no production low-latency systems
 * A pattern of very short tenures with no depth in one low-latency environment

Screening focuses on

 1. ~6+ years of professional C++ / low-latency engineering
 2. Low-latency C++ built inside traditional financial services
 3. Direct market-data, feed-handler, or electronic-trading experience
 4. Current base in the UK, NL, or FR and openness to a remote 12-month contract

## Description

We are hiring a senior, hands-on C++ engineer to build and optimize the low-latency hot path for a top-tier global trading firm (name shared under NDA). This is a headhunting search for one exceptional engineer, not a volume hire. You will own performance-critical trading and market-data systems in production, working alongside traders and quant researchers., * Design, build, and optimize the low-latency hot path for automated/electronic trading in modern C++ (C++17/20)

 * Build and maintain market-data infrastructure: feed handlers, ticker plant, order-book construction, and normalization
 * Implement exchange connectivity and FIX-based order flow, including smart-order-routing components
 * Drive down tick-to-trade latency using lock-free data structures, cache- and NUMA-aware design, and kernel-bypass networking (Solarflare/Onload, DPDK)
 * Profile, measure, and eliminate latency and jitter across the full stack
 * Translate strategy and execution needs from traders and quants into performant, reliable production code
 * Own components end-to-end: reliability, observability, and incident response, We use AI-assisted tools in parts of our recruitment process, including candidate sourcing and initial screening support. In line with the EU AI Act and GDPR, we want you to know:
 * Human oversight: A qualified human makes every shortlisting, interview, and hiring decision. No candidate is rejected or advanced by an automated system alone.
 * No solely automated decisions: You will not be subject to a decision based solely on automated processing (GDPR Art. 22).
 * Transparency: You will be told when you are interacting with an AI system (for example, automated outreach or any AI-assisted assessment) and what it does.
 * No prohibited practices: We do not use emotion-recognition or biometric-categorization tools in hiring.
 * Fairness: Our screening is based on job-relevant skills and experience only; we monitor for and act against discriminatory outcomes.
 * Your rights: You may request human review of any AI-assisted step, an explanation of how it works, and access to or correction/deletion of your personal data. Contact us at any stage to exercise these rights.